WO2024114815A1 - Oil well tubular column hydraulic clamp torque test system and test method - Google Patents

Abstract

An oil well tubular column hydraulic clamp torque test system, comprising an oil well tubular column hydraulic clamp torque meter (110), a bearing body (120), a bearing body torque meter (130) and a controller (140), wherein the bearing body (120) is used for bearing torque applied by an oil well tubular column hydraulic clamp (200), the oil well tubular column hydraulic clamp torque meter (110) is used for being connected with the oil well tubular column hydraulic clamp (200), the bearing body torque meter (130) is connected to the bearing body (120), the oil well tubular column hydraulic clamp torque meter (110) and the bearing body torque meter (130) are both electrically connected to the controller (140), and the controller (140) is used for acquiring and comparing an output torque value and a bearing torque value, and obtaining a precision value of a torque output of the oil well tubular column hydraulic clamp (200). The oil well tubular column hydraulic clamp torque test system provided by the present invention directly measures the output torque value at an output terminal of the oil well tubular column hydraulic clamp, so that the accuracy of the torque value output by the oil well tubular column hydraulic clamp is relatively high. Further provided is an oil well tubular column hydraulic clamp torque test method.

Description

A hydraulic tongs torque testing system and method for oil well pipe string Technical Field

The present application relates to the technical field of testing devices, and in particular to a torque testing system and method for hydraulic tongs of an oil well tubular column.

Background technique

Oil well tubing is an indispensable and important tool in the exploration and production of oil and gas.

The oil well tubular string includes multiple sections of oil well tubular segments connected in sequence, and the oil well tubular segments are connected in series in sequence through threaded connections to form an oil well tubular string. The sealing properties of the threaded connections between the oil well tubular segments are required to be high. The threaded connection between the oil well tubular segments is usually carried out using an oil well tubular string hydraulic tong. If the make-up torque of the hydraulic tong is too large or too small, it will cause accidents such as sticking, leakage, and fracture failure at the threaded connection of the oil well tubular segment. Therefore, it is necessary to regularly test the output torque working parameters of the oil well tubular string hydraulic tongs. In the related art, the output torque working parameter test of the oil well tubular string hydraulic tongs is usually carried out by separately detecting and calibrating the sensors, hydraulic meters and other measurable elements in the oil well tubular string hydraulic tongs.

The torque value output by the hydraulic tongs for oil well tubing after the sensors and hydraulic gauges have been tested and calibrated is of low accuracy.

Summary of the invention

The purpose of the present application is to provide a torque testing system and method for hydraulic tongs of oil well tubing, which can measure the output torque value directly at the output terminal of the hydraulic tongs of oil well tubing, so that the torque value output by the hydraulic tongs of oil well tubing is more accurate.

In the first aspect, an embodiment of the present application provides an oil well tubular hydraulic tongs torque testing system, comprising an oil well tubular hydraulic tongs torque meter, a carrier, a carrier torque meter and a controller; the carrier is used to bear the torque applied by the oil well tubular hydraulic tongs; the oil well tubular hydraulic tongs torque meter is used to be connected to the oil well tubular hydraulic tongs to test at least one output torque value of the oil well tubular hydraulic tongs; the carrier torque meter is connected to the carrier to test at least one bearing torque value of the carrier, wherein the bearing torque value corresponds to the output torque value one-to-one; the oil well tubular hydraulic tongs torque meter and the carrier torque meter are both connected to the controller, and the controller is used to obtain and compare the output torque value and the bearing torque value, and to derive the accuracy value of the torque output of the oil well tubular hydraulic tongs.

In a possible embodiment, the carrier includes a first clamping part and a second clamping part; the first clamping part is engaged by the main clamp of the oil well tubing hydraulic tongs of the oil well tubing hydraulic tongs and bears the torque applied by the main clamp of the oil well tubing hydraulic tongs; the second clamping part is engaged by the back clamp of the oil well tubing hydraulic tongs of the oil well tubing hydraulic tongs.

In a possible implementation, the oil well tubing hydraulic tongs torque meter includes a first torque sensor and a first signal processor, the first torque sensor is used to connect to the torque output mechanism in the oil well tubing hydraulic tongs, and the first torque sensor and the controller are both electrically connected to the first signal processor.

In a possible implementation, the carrier torque meter includes a second torque sensor and a second signal processing The second torque sensor is arranged on the carrier and is located between the first clamping part and the second clamping part; the second torque sensor and the controller are both electrically connected to the second signal processor.

In a possible embodiment, the carrier is a columnar structure, and the carrier is provided with a cavity; along the axial direction of the carrier, the carrier includes a first end and a second end opposite to each other; the carrier is provided with a first port connected to the cavity, and the first port is located on the end surface of the first end; the carrier is provided with a second port connected to the cavity, and the second port is located on the end surface of the second end.

In a possible embodiment, the carrier torque meter also includes a torsion angle sensor arranged on the inner surface of the cavity; the torsion angle sensor is signal-connected to the second signal processor, and the second signal processor is configured to calculate the torque value borne by the carrier based on the torsion angle collected by the torsion angle sensor.

In one possible embodiment, the signal processing system includes a signal conversion module and a comparison module; the signal conversion module is configured to convert the signals collected by the torque sensor and the torsion angle sensor into a first torque value and a second torque value; the comparison module is configured to obtain the actual error value between the first torque value and the second torque value, and compare it with a preset error value to determine whether the carrier torque meter is accurate.

In a possible implementation manner, the first port is provided with a first protective cover to seal the first port, and the second port is further provided with a second protective cover to seal the second port; the first protective cover and the second protective cover are respectively provided with through holes for the signal line to pass through.

In a possible implementation, the carrier torque meter further includes a third protective cover; the third protective cover is sleeved on the outer circumferential surface of the carrier and is located between the first clamping portion and the second clamping portion, and the third protective cover covers the second torque sensor.

In one possible implementation, the controller includes a data processor and a display; the data processor and the display are electrically connected; the data processor is used to calculate the accuracy value of the torque output of the hydraulic tongs of the oil well tubing, and the display is used to display the accuracy value of the torque output of the hydraulic tongs of the oil well tubing.

In a possible implementation, a hydraulic pump is further included, and the hydraulic pump is used to be connected to a torque output mechanism in the hydraulic tongs of the oil well tubing string.

In a second aspect, an embodiment of the present application provides a method for testing the torque of a hydraulic tong of an oil well tubular column, which is used to test the accuracy value of the torque output of a hydraulic tong of an oil well tubular column. The method for testing the torque of a hydraulic tong of an oil well tubular column comprises:

Obtain the output torque value of the hydraulic tongs of the oil well pipe string;

Obtain the bearing torque value of the bearing body;

The accuracy value of the torque output of the hydraulic tongs of the oil well tubular column is calculated according to the output torque value and the load torque value.

In a possible implementation manner, obtaining the output torque value of the oil well tubular hydraulic tongs includes: obtaining a plurality of output torque values uniformly distributed between 0% and 100% of the maximum output torque value of the oil well tubular hydraulic tongs.

In a possible implementation, the obtaining of a plurality of output torque values uniformly distributed between 0% and 100% of the maximum output torque value of the oil well tubing hydraulic tongs also includes: obtaining a plurality of bearing torque values corresponding one-to-one to the plurality of output torque values.

In a possible implementation, the accuracy value of the torque output of the hydraulic tongs of the oil well tubing string calculated based on the output torque value and the bearing torque value includes: the accuracy of the torque output of the hydraulic tongs of the oil well tubing string is equal to (1-(output torque value minus the absolute value of the corresponding bearing torque value divided by the bearing torque value))*100%.

In combination with the above technical solution, the present application provides a hydraulic tongs torque testing system and testing method for oil well pipe strings. The oil well tubing hydraulic tongs torque test system is provided with an oil well tubing hydraulic tongs torque meter, a bearing body, a bearing body torque meter and a controller; the bearing body is used to bear the torque applied by the oil well tubing hydraulic tongs; the oil well tubing hydraulic tongs torque meter is used to test the output torque value of the oil well tubing hydraulic tongs; the bearing body torque meter is used to test the bearing torque value of the bearing body; the controller is used to obtain the output torque value and the bearing torque value, and to obtain the accuracy value of the torque output of the oil well tubing hydraulic tongs.

The oil well tubular hydraulic tongs torque testing system provided in the present application can simulate the real working environment of the oil well tubular hydraulic tongs by making the oil well tubular hydraulic tongs apply torque on the bearing body. The output torque value tested by the oil well tubular hydraulic tongs torque meter is the theoretical torque of the tongs structure design applied on the bearing body, and the bearing torque value measured by the bearing body torque meter is the torque actually borne by the bearing body. The precision value calculated by the controller based on these two torque values is relatively accurate. After the oil well tubular hydraulic tongs are tested and calibrated by the precision value calculated by the controller, the accuracy of the output torque value of the oil well tubular hydraulic tongs is relatively high.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a diagram showing a use state of a hydraulic tong torque testing system for a well tubular column provided by an embodiment of the present application;

FIG. 2 is a second diagram of the use state of the oil well tubular hydraulic tongs torque testing system provided by an embodiment of the present application;

FIG3 is a diagram showing a third state of use of the oil well tubular hydraulic tongs torque testing system provided by an embodiment of the present application;

FIG4 is a schematic diagram of a carrier torque meter and a carrier arrangement according to an embodiment of the present application;

FIG5 is a second schematic diagram of the arrangement of a carrier torque meter and a carrier provided in an embodiment of the present application;

FIG6 is a schematic diagram of the arrangement of a torsion angle sensor and a second torque sensor provided in an embodiment of the present application;

FIG7 is a schematic diagram of the arrangement of the first protective cover, the second protective cover and the third protective cover provided in an embodiment of the present application;

FIG8 is a fourth diagram of the use state of the oil well tubular hydraulic tongs torque testing system provided by the embodiment of the present application;

FIG9 is a flow chart of a method for testing the torque of a hydraulic tong in an oil well tubing string according to an embodiment of the present application.

Description of reference numerals:
100-Oil well pipe string hydraulic tongs torque test system;
110-oil well pipe string hydraulic tongs torque meter; 111-first torque sensor; 112-first signal processor;
120-carrying body; 121-first clamping portion; 122-second clamping portion; 123-cavity; 124-through hole;
130- Bearing body torque meter;
131 - second torque sensor; 132 - second signal processor; 133 - first signal transmission line;
134-torsion angle sensor; 135-second signal transmission line; 136-first protective cover; 137-second protective cover; 138-
Third protective cover;
140-controller; 141-data processor; 142-display;
150-Hydraulic pump;
160-Hydraulic pipeline;
L- bearing body axial direction;
200-Hydraulic tongs for oil well pipe string;
210-oil well pipe string hydraulic tongs body; 211-torque output mechanism;
220-Hydraulic tongs for oil well pipe string;
230-Hydraulic tongs for oil well pipe strings;
240-Coupling.

Detailed ways

Oil well tubing is an indispensable and important tool in the exploration and production of oil and gas.

The oil well tubular string includes multiple oil well tubular sections connected in sequence, and the oil well tubular sections are connected in series in sequence through threaded connections to form an oil well tubular string. The oil well tubular string is subjected to high temperature, high pressure, external extrusion, bending, torsion and other composite loads during operation, so the sealing of the threaded connection between the oil well tubular sections is required to be high. The threaded connection between the oil well tubular sections is usually carried out with an oil well tubular string hydraulic tong. If the tightening torque of the oil well tubular string hydraulic tong is too large or too small, it will cause accidents such as sticking, leakage and fracture failure at the threaded connection of the oil well tubular section. Therefore, it is necessary to regularly test the working parameters in the oil well tubular string hydraulic tong.

The oil well tubular hydraulic tongs include a hydraulic mechanism and a torque output mechanism. The hydraulic energy of the hydraulic mechanism is converted into torque and output by the torque output mechanism. In the related art, the test of the oil well tubular hydraulic tongs is usually to test the hydraulic pressure of the hydraulic mechanism through a hydraulic gauge and to test the torque of the torque output mechanism through a sensor. In other words, each component of the oil well tubular hydraulic tongs is tested and calibrated separately using testers such as sensors and hydraulic gauges.

However, when problems such as leakage in the hydraulic mechanism, wear and loosening of the mating surfaces of the transmission parts in the torque output mechanism, and loosening of the sensor occur, even if the values measured by the hydraulic gauge and the sensor are still within the error range, the torque output by the hydraulic tongs of the oil well tubing has deviated, resulting in low accuracy of the output torque value of the hydraulic tongs of the oil well tubing.

The reason is that the oil well tubing hydraulic tongs are a complex mechanical component, including a complex transmission system, and the torsional force of the tongs is provided by the liquid pressure through the mechanical energy conversion. The torque value is equal to the product of the force and the length of the lever arm. The sensor only senses the magnitude of the force applied by the main tongs, and the hydraulic gauge only detects the accuracy of the liquid pressure value flowing through the tongs. Therefore, the detection and calibration of the sensor and the hydraulic gauge is only the detection of the force value, and cannot detect the change of the lever arm value during the use of the hydraulic tongs, nor can it detect the real output torque value.

The output torque value accuracy of the hydraulic tongs of the oil well tubular string is low, so the torque acting on the oil well tubular string does not match the required torque, and cannot meet the torque value required for the threaded connection between the oil well tubular sections in the oil well tubular string.

Based on this, the present application provides a torque testing system and method for hydraulic tongs of oil well tubing strings, which measures the output torque value directly at the output terminal of the hydraulic tongs of oil well tubing strings, so that the torque value output by the hydraulic tongs of oil well tubing strings has higher accuracy.

The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

Since multiple components in the oil well tubing hydraulic tongs torque testing system 100 are connected to the oil well tubing hydraulic tongs 200, the structural schematic diagram of the oil well tubing hydraulic tongs torque testing system 100 is not shown separately in Figure 1 and subsequent similar views. Instead, a usage status diagram of the oil well tubing hydraulic tongs torque testing system 100 and the oil well tubing hydraulic tongs 200 is directly shown to clearly show the connection relationship between the oil well tubing hydraulic tongs torque testing system 100 and the oil well tubing hydraulic tongs 200.

As shown in FIG1 , the oil well tubular hydraulic tongs torque testing system 100 provided in the present application includes an oil well tubular hydraulic tongs torque meter 110, a carrier 120, a carrier torque meter 130 and a controller 140; the carrier 120 is used to bear the torque applied by the oil well tubular hydraulic tongs 200; the oil well tubular hydraulic tongs torque meter 110 is used to be connected to the oil well tubular hydraulic tongs 200 to test the output torque value of the oil well tubular hydraulic tongs 200; the carrier torque meter 130 is connected to the carrier 120 to test the bearing torque value of the bearing body 120; the oil well tubular hydraulic tongs torque meter 110 and the carrier torque meter 130 are both electrically connected to the controller 140, and the controller 140 is used to obtain the output torque value and the bearing torque value, and to obtain the oil well tubular hydraulic Precision value of torque output of tongs 200.

The oil well tubular hydraulic tongs 200 are devices for providing torque to connect the oil well tubular sections in the oil well tubular string, and the oil well tubular hydraulic tongs 200 apply torque to the carrier 120. In this embodiment, the carrier 120 can be made according to the appearance of the oil well tubular string to simulate the actual working environment of the oil well tubular hydraulic tongs 200.

The oil well tubular hydraulic tongs torque meter 110 is used to test the output torque value of the oil well tubular hydraulic tongs 200. Specifically, when testing the output torque value of the oil well tubular hydraulic tongs 200, the maximum output torque value of the oil well tubular hydraulic tongs 200 can be tested, and the values of 20%, 40%, 60% and 80% of the maximum output torque value of the oil well tubular hydraulic tongs 200 can also be tested, thereby, the output torque value of each numerical range of the oil well tubular hydraulic tongs 200 can be tested.

It is understandable that the values corresponding to 20%, 40%, 60% and 80% of the maximum output torque value of the oil well tubing hydraulic tongs 200 are only examples. In actual operation, the values at different percentages of the maximum output torque value can be selected for testing according to the specific specifications of the oil well tubing hydraulic tongs 200, as long as the range of the output torque value of the oil well tubing hydraulic tongs 200 can be covered.

The bearing body torque meter 130 is used to test the bearing torque value borne by the bearing body 120. Specifically, when testing the bearing torque value of the bearing body 120, the bearing torque value of the bearing body 120 corresponding to the maximum output torque value of the oil well tubular hydraulic tongs 200 can be tested, and the bearing torque value of the bearing body 120 corresponding to the values of 20%, 40%, 60% and 80% of the maximum output torque value of the oil well tubular hydraulic tongs 200 can also be tested.

The output torque value tested by the oil well tubing hydraulic tongs torque meter 110 is transmitted to the controller 140, and the bearing torque value tested by the bearing body torque meter 130 is also transmitted to the controller 140. After obtaining the output torque value and the bearing torque value, the controller 140 calculates the accuracy value of the torque output of the oil well tubing hydraulic tongs 200 based on the output torque value and the bearing torque value.

Specifically, the controller 140 can calculate the accuracy value of the torque output of the oil well tubing hydraulic tongs 200 in the following manner:

The accuracy value of the torque output of the oil well tubular hydraulic tongs 200 = (1-(output torque value-absolute value of the load torque value)/load torque value)*100%. It can be understood that when the controller 140 calculates the accuracy value of the torque output of the oil well tubular hydraulic tongs 200, the load torque value and the output torque value are one-to-one corresponding.

That is to say, when the output torque value is the maximum output torque value, the load torque value corresponding to the maximum output torque value needs to be used; when the output torque value is 80% of the maximum output torque value, the load torque value corresponding to 80% of the maximum output torque value needs to be used, and so on. Thus, multiple precision values of the torque output of the oil well tubular hydraulic tongs 200 within the test range can be calculated one by one according to the output torque value and the corresponding load torque value, so as to comprehensively test the torque output of the oil well tubular hydraulic tongs 200.

The controller 140 may also use other methods to calculate the accuracy value of the torque output of the oil well tubing hydraulic tongs 200, which will not be described in detail here.

The accuracy value of the torque output of the oil well tubular hydraulic tongs 200 needs to be greater than or equal to 95%. When the accuracy value of the torque output of the oil well tubular hydraulic tongs 200 is less than 95%, the operator can calibrate the oil well tubular hydraulic tongs 200 according to the accuracy value fed back by the controller 140. Among them, at the points of the output working torque value of the oil well tubular hydraulic tongs 200 (for example, 40%, 60% and 80% of the maximum output torque value), the accuracy value of the torque output of the oil well tubular hydraulic tongs 200 needs to be greater than or equal to 96.5%.

By making the oil well pipe string hydraulic tongs 200 apply torque on the bearing body 120, the real working environment of the oil well pipe string hydraulic tongs 200 can be simulated. The output torque value of the oil well pipe string hydraulic tongs 200 tested by the oil well pipe string hydraulic tongs torque meter 110 is the theoretical torque acting on the bearing body 120, and the bearing torque value measured by the bearing body torque meter 130 is the torque actually borne by the bearing body 120. Therefore, the oil well pipe string hydraulic tongs are controlled according to the accuracy value calculated by the controller 140. After the detection and calibration of 200, the accuracy of the output torque value of the oil well pipe string hydraulic tongs 200 is higher.

The oil well tubular hydraulic tongs torque testing system 100 provided in the present application is provided with an oil well tubular hydraulic tongs torque meter 110, a carrier 120, a carrier torque meter 130 and a controller 140; the carrier 120 is used to bear the torque applied by the oil well tubular hydraulic tongs 200; the oil well tubular hydraulic tongs torque meter 110 is used to test the output torque value of the oil well tubular hydraulic tongs 200; the carrier torque meter 130 is used to test the bearing torque value of the carrier 120; the controller 140 is used to obtain the output torque value and the bearing torque value, and to obtain the accuracy value of the torque output of the oil well tubular hydraulic tongs 200.

The oil well tubing hydraulic tongs torque testing system 100 provided in the present application can simulate the real working environment of the oil well tubing hydraulic tongs 200 by making the oil well tubing hydraulic tongs 200 apply torque on the carrier 120. The output torque value of the oil well tubing hydraulic tongs 200 tested by the oil well tubing hydraulic tongs torque meter 110 is the theoretical torque acting on the carrier 120, and the bearing torque value measured by the carrier torque meter 130 is the torque actually borne by the carrier 120. The precision value calculated by the controller 140 based on these two torque values is relatively accurate. After the oil well tubing hydraulic tongs 200 are tested and calibrated by the precision value calculated by the controller 140, the accuracy of the torque value output by the oil well tubing hydraulic tongs 200 is higher.

As shown in FIG2 , the oil well tubular hydraulic tong 200 provided in the embodiment of the present application comprises an oil well tubular hydraulic tong body 210, an oil well tubular hydraulic tong main tong 220 and an oil well tubular hydraulic tong backup tong 230. The oil well tubular hydraulic tong body 210 is used to support and connect the oil well tubular hydraulic tong main tong 220 and the oil well tubular hydraulic tong backup tong 230.

Specifically, a torque output mechanism 211 is provided in the oil well tubular hydraulic tong body 210, and the torque output mechanism 211 is connected to the oil well tubular hydraulic tong main tong 220 through a coupling 240. The oil well tubular hydraulic tong main tong 220 can rotate relative to the oil well tubular hydraulic tong body 210 around the bearing body axial direction L. The oil well tubular hydraulic tong backup tong 230 is fixedly connected to the oil well tubular hydraulic tong body 210.

Next, the specific manner in which the oil well tubular hydraulic tongs 200 apply torque to the carrier 120 is described.

As shown in Figures 3 and 4, the carrier body 120 provided in the embodiment of the present application is configured to receive the output torque from the hydraulic tongs 200 of the oil well tubing when the output torque of the hydraulic tongs 200 of the oil well tubing is tested, that is, the carrier body 120 can be made to imitate the appearance of the oil well tubing.

Specifically, the carrier 120 includes a first clamping portion 121 and a second clamping portion 122; the first clamping portion 121 is engaged by the main hydraulic tongs 220 of the oil well tubular hydraulic tongs 200 and bears the torque applied by the main hydraulic tongs 220 of the oil well tubular hydraulic tongs; the second clamping portion 122 is engaged by the back-up hydraulic tongs 230 of the oil well tubular hydraulic tongs 200.

For example, the carrier 120 can be cylindrical, the axial direction of the carrier 120 is called the carrier axial direction L, the first clamping portion 121 and the second clamping portion 122 are spaced apart along the carrier axial direction L, and the first clamping portion 121 and the second clamping portion 122 are respectively located on the outer peripheral surface of the carrier 120, and an arrangement area of the second torque sensor 131 is formed between the first clamping portion 121 and the second clamping portion 122.

The hydraulic tongs back-up tongs 230 of the oil well tubular column are engaged with the second clamping part 122, and the hydraulic tongs main tongs 220 of the oil well tubular column are engaged with the first clamping part 121. At the same time, the hydraulic tongs main tongs 220 of the oil well tubular column apply torque on the first clamping part 121 around the axial direction L of the carrier body, so that torque is generated between the first clamping part 121 and the second clamping part 122 due to torsional deformation. The carrier body torque meter 130 can test the torque value, that is, the bearing torque value of the carrier body 120.

The specific connection method between the oil well tubular hydraulic tongs torque meter 110 and the oil well tubular hydraulic tongs 200 is described below.

Continuing to refer to FIG. 3 , the oil well tubular hydraulic tongs torque meter 110 includes a first torque sensor 111 and a first signal processor 112 . The first torque sensor 111 is used to connect to the torque output mechanism 211 in the oil well tubular hydraulic tongs 200 . The first torque sensor 111 and the controller 140 are both electrically connected to the first signal processor 112 .

The first torque sensor 111 is used to test the torque of the torque output mechanism 211 and transmit the torque to the first signal processor 112. The torque is processed by the first signal processor 112 to obtain an output torque value. The first signal processor 112 transmits the output torque value to the controller 140.

Furthermore, the carrier torque meter 130 provided in the embodiment of the present application includes a second torque sensor 131 and a second signal processor 132 . The second torque sensor 131 is disposed on the carrier 120 . The second torque sensor 131 and the controller 140 are both electrically connected to the second signal processor 132 .

The second torque sensor 131 can be arranged between the first clamping part 121 and the second clamping part 122. For example, the second torque sensor 131 can be arranged on the outer peripheral surface of the carrier 120 and located between the first clamping part 121 and the second clamping part 122. Such arrangement facilitates the test of the torque generated due to torsional deformation between the first clamping part 121 and the second clamping part 122, that is, the second torque sensor 131 can obtain the torque applied to the carrier 120 by the oil well tubular hydraulic tongs 200. Further, the second torque sensor 131 transmits this torque to the second signal processor 132, and the torque is processed by the second signal processor 132 to obtain the bearing torque value. The second signal processor 132 transmits the bearing torque value to the controller 140.

The controller 140 provided in the embodiment of the present application includes a data processor 141 and a display 142, the data processor 141 and the display 142 are electrically connected, the data processor 141 is used to calculate the accuracy value of the torque output of the oil well tubular hydraulic tongs 200, and the display 142 is used to test the accuracy value of the torque output of the oil well tubular hydraulic tongs 200. The accuracy value of the oil well tubular hydraulic tongs torque testing system 100 calculated by the data processor 141 is displayed through the display 142, which can be convenient for operators to view.

The second torque sensor 131 in the embodiment of the present application is connected to the second signal processor 132. The second signal processor 132 can be arranged outside the carrier 120 and is connected to the second torque sensor 131 signal through a signal transmission line. The second signal processor 132 is used to receive the torque signal from the second torque sensor 131 and convert it into a torque value, and output it.

For example, the second signal processor 132 provided in the embodiment of the present application includes a signal conversion module, which can convert the torque signal collected by the second torque sensor 131 into a numerical signal, and output the numerical signal to the controller 140. The controller 140 includes the above-mentioned display 142, and the display 142 is connected to the second signal processor 132. The torque value output by the second signal processor 132 can be further displayed in the display 142, so that the tester can more intuitively obtain the output torque of the current oil well tubing hydraulic tongs 200.

When the output torque of the oil well tubular hydraulic tongs 200 is tested by using the bearing body torque meter 130 provided in the embodiment of the present application, the two force application arms of the oil well tubular hydraulic tongs 200 can be clamped at the first clamping part 121 and the second clamping part 122 respectively, and torque is applied to the bearing body 120. The second torque sensor 131 obtains the torque borne by the bearing body 120 and transmits it to the second signal processor 132. The second signal processor 132 can obtain the torque value on the bearing body 120 at this time and output it, so that the tester can obtain the current output torque value of the oil well tubular hydraulic tongs 200.

Compared with the solution in the related art that detects and calibrates the accuracy of individual components such as sensors and hydraulic gauges of the oil well tubular hydraulic tongs, this solution does not consider the influence of the entire torque transmission system on the output torque, and the output torque test of the oil well tubular hydraulic tongs is not accurate enough. For example, when there is leakage in the hydraulic system, loose sensors, wear and loosening of the mating surfaces between transmission parts, etc., even if the accuracy of the hydraulic gauge and the sensor are still in good condition, the output torque has deviated from the theoretical calculation result (the displayed value on the torque meter).

The carrier torque meter 130 provided in the embodiment of the present application uses the carrier 120 as the oil well pipe string in the actual operation process, and sets a second torque sensor 131 on the carrier 120 to detect the final output torque value of the oil well pipe string hydraulic tongs 200, which can truly reflect the real torque acting on the threaded connection of the oil well pipe string and can accurately measure the torque of the oil well pipe string. Apply appropriate make-up torque when connecting the oil well pipe threads; thereby avoiding accidents such as sticking, leakage and fracture failure of the oil well pipe threads during use caused by too small or too large make-up torque during the thread connection of the oil well pipe.

As shown in FIG. 5 , along the axial direction of the carrier 120 , the carrier 120 includes a first end and a second end opposite to each other, wherein the first end of the carrier 120 is provided with a first port, the first port is located on the end surface of the first end, and the first port is communicated with the cavity 123 .

Exemplarily, the carrier 120 is a columnar structure as a whole, and the carrier 120 is provided with a cavity 123 along its axial direction. For example, the carrier 120 is a cylindrical structure as a whole, and the ratio of its outer diameter to its wall thickness can range from 8:1 to 10:1, and the length of the carrier 120 along its axial direction can be 300mm. Furthermore, the material of the carrier 120 is a metal material with high strength, high elastic limit, and high fatigue strength; preferably, the structural strength of the carrier 120 is greater than 830MPa.

The carrier 120 is a cylindrical structure with a certain wall thickness. The carrier 120 is provided with a through hole 124 penetrating its side wall, and the through hole 124 is connected to the cavity 123. The through hole 124 is provided close to the second torque sensor 131 and is located between the first clamping portion 121 and the second clamping portion 122.

A first signal transmission line 133 is arranged between the second signal processor 132 and the second torque sensor 131. One end of the first signal transmission line 133 is connected to the second signal processor 132. The other end of the first signal transmission line 133 enters the cavity 123 through the first port, and then passes through the through hole 124 to be connected to the signal of the second torque sensor 131 located on the outer peripheral surface of the carrier 120.

In this way, the layout of the first signal transmission line 133 can be optimized, and part of the first signal transmission line 133 can be arranged in the cavity 123 to protect the first signal transmission line 133. Furthermore, compared with the first signal transmission line 133 being arranged on the outer peripheral surface of the carrier 120, the first signal transmission line 133 is arranged in the cavity 123, which can avoid interference or damage to the first signal transmission line 133 when the force arm clamps the carrier 120.

As shown in FIG6 , the carrier torque meter 130 provided in the embodiment of the present application further includes a torsion angle sensor 134, which can be arranged on the inner surface of the cavity 123, and a second signal transmission line 135 is arranged between the torsion angle sensor 134 and the second signal processor 132, one end of the second signal transmission line 135 is connected to the second signal processor 132, and the other end of the second signal transmission line 135 enters the cavity 123 from the first port and is connected to the torsion angle sensor 134. Further, in order to shorten the wiring length of the second signal transmission line 135, since the second signal processor 132 is arranged close to the first port of the carrier 120, the torsion angle sensor 134 can be arranged on the side wall close to the first port.

The second signal processor 132 in the embodiment of the present application is configured to calculate the torque value borne by the carrier 120 according to the torsion angle collected by the torsion angle sensor 134. Specifically, in the embodiment of the present application, not only the second torque sensor 131 but also the torsion angle sensor 134 are provided on the carrier 120, and both are connected to the second signal processor 132 through corresponding signal transmission lines; the above-mentioned signal conversion module is not only used to convert the torque signal collected by the second torque sensor 131 into a numerical signal (first torque value), but also can convert the torsion angle information collected by the torsion angle sensor 134 into a numerical signal (second torque value).

In this way, the first torque value and the second torque value can be used to determine whether the current carrier torque meter 130 is accurate. Exemplarily, the second signal processor 132 provided in the embodiment of the present application also includes a comparison module, and the comparison module is preset with an error value between the first torque value and the second torque value, and this error value is defined as a preset error value; further, the preset error value is less than or equal to 5% of the first torque value.

The comparison module in the embodiment of the present application is configured to obtain the actual error value between the first torque value and the second torque value, and compare it with the preset error value to determine whether the carrier torque meter 130 is accurate. If the actual error value is less than or equal to the preset error value, the second signal processor 132 will output the first torque value; if the actual error value is greater than the preset error value, the carrier If there is a problem with the torque meter 130 itself and its measurement result is not accurate enough, the second signal processor 132 will output an error alarm prompt of the carrier torque meter 130 to remind the operator to check the carrier torque meter 130 .

In this way, the embodiment of the present application forms two independent torque sensing systems and analysis systems by respectively arranging a second torque sensor 131 and a torsion angle sensor 134 on the carrier 120, so as to perform self-comparison verification on the torque value applied to the carrier 120. If the actual error value between the two detection values is within the preset error value range, the torque value is selectively output and displayed, thereby effectively ensuring the test precision and accuracy of the carrier torque meter 130, making the test results more accurate and reliable.

On the basis of the above-mentioned embodiment, the carrier torque meter 130 provided in the embodiment of the present application further has a second port disposed on the second end of the carrier 120, and the second port is located on the end surface of the second end, and the second port is disposed opposite to the first port. For example, the carrier 120 may be a circular tubular structure with openings at both ends.

As shown in FIG. 7 , in order to prevent foreign matter from entering the cavity 123 of the carrier 120 , a first protective cover 136 is provided at the first port in the embodiment of the present application, and the first protective cover 136 seals the first port; a second protective cover 137 is provided at the second port, and the second protective cover 137 seals the second port.

Exemplarily, the outer circumferences of the first end and the second end of the carrier 120 are respectively provided with threaded sections, and the first protective cover 136 and the second protective cover 137 are respectively provided with internal threads that match the threaded sections, that is, the first protective cover 136 and the second protective cover 137 are connected to the carrier 120 by threads. Of course, the carrier 120 and the first protective cover 136 and the second protective cover 137 can also be connected in other ways, such as clamping, etc. The first protective cover 136 and the second protective cover 137 can be made of hard resin material, which is not limited in this embodiment.

It should be noted that the end face of the first protective cover 136 is provided with a via hole for the first signal transmission line 133 and the second signal transmission line 135 to pass through, that is, the via hole passes through the end face of the first protective cover 136 to connect the cavity 123 and the external environment, so that part of the first transmission line and the second transmission line extend into the cavity 123.

On the basis of the above-mentioned embodiment, the torque testing device for the oil well tubular hydraulic tongs 200 provided in the embodiment of the present application further includes a third protective cover 138, which can be made of a metal material and has a certain structural strength. The third protective cover 138 is sleeved on the outer peripheral surface of the carrier 120 and is located between the first clamping portion 121 and the second clamping portion 122, and the third protective cover 138 covers the second torque sensor 131, that is, the third protective cover 138 can provide protection for the second torque sensor 131.

As shown in FIG8 , the oil well tubular hydraulic tongs torque testing system 100 provided in the embodiment of the present application further includes a hydraulic pump 150, which is used to connect with the torque output mechanism 211 in the oil well tubular hydraulic tongs 200. Specifically, the hydraulic pump 150 is connected to the torque output mechanism 211 in the oil well tubular hydraulic tongs 200 through the hydraulic pipeline 160 to transmit hydraulic energy to the torque output mechanism 211, and the torque output mechanism 211 converts the hydraulic energy into mechanical energy, and applies it to the carrier 120 through the main tongs 220 of the oil well tubular hydraulic tongs.

The minimum hydraulic pressure of the hydraulic pump 150 is greater than 10MPa, and the minimum displacement is greater than 35L/min, thereby meeting the testing requirements of most oil well tubular hydraulic tongs 200. According to the actual situation of the oil well tubular hydraulic tongs 200, the hydraulic pump 150 can be adjusted and replaced accordingly to meet the hydraulic power requirements required for the test.

As shown in FIG9 , the embodiment of the present application is based on the oil well tubular hydraulic tongs torque testing system provided in the above embodiment, and tests the accuracy of the torque output of the oil well tubular hydraulic tongs. The testing method includes the following steps:

S101, obtaining the output torque value of the oil well tubular hydraulic tongs 200.

The oil well tubular hydraulic tongs torque meter 110 tests the output torque value of the oil well tubular hydraulic tongs 200 and transmits the output torque value to the controller 140 .

S102 , obtaining a bearing torque value of the bearing body 120 .

The load bearing torque meter 130 tests the load bearing torque value borne by the load bearing body 120 and transmits the load bearing torque value to the controller 140 .

S103, calculating the accuracy value of the torque output of the oil well tubular hydraulic tongs 200 according to the output torque value and the load torque value.

The controller 140 can calculate the accuracy value of the torque output of the oil well pipe string hydraulic tongs 200 in the following manner:

The accuracy value of the torque output of the oil well tubular hydraulic tongs 200 = (1-(output torque value-absolute value of the load torque value)/load torque value)*100%.

Wherein, obtaining the output torque value of the oil well pipe string hydraulic tongs 200 includes:

A plurality of output torque values evenly distributed between 0% and 100% of the maximum output torque value of the oil well tubular string hydraulic tongs 200 are obtained.

For example, the oil well tubular hydraulic tongs torque meter 110 can test 20%, 40%, 60% and 80% of the maximum output torque value of the oil well tubular hydraulic tongs 200, thereby testing the output torque values of each numerical segment of the oil well tubular hydraulic tongs 200. It can be understood that the values corresponding to 20%, 40%, 60% and 80% of the maximum output torque value of the oil well tubular hydraulic tongs 200 are only examples, and in actual operation, different percentage values can be selected for testing according to the specific specifications of the oil well tubular hydraulic tongs 200, as long as the range of the output torque value of the oil well tubular hydraulic tongs 200 can be covered.

Acquiring multiple output torque values uniformly distributed between 0% and 100% of the maximum output torque value of the oil well tubular hydraulic tongs 200 also includes: acquiring multiple load-bearing torque values corresponding to the multiple output torque values one by one.

Taking the values of 20%, 40%, 60% and 80% of the maximum output torque value of the oil well tubular hydraulic tongs 200 as an example, when the oil well tubular hydraulic tongs torque meter 110 tests 80% of the maximum output torque value, the bearing body torque meter 130 simultaneously tests the bearing torque value corresponding to 80% of the maximum output torque value; when the oil well tubular hydraulic tongs torque meter 110 tests 60% of the maximum output torque value, the bearing body torque meter 130 simultaneously tests the bearing torque value corresponding to 60% of the maximum output torque value, and so on. Thus, multiple precision values of the torque output of the oil well tubular hydraulic tongs 200 within the test range can be calculated one by one according to the output torque value and the corresponding bearing torque value, so as to comprehensively test the torque output of the oil well tubular hydraulic tongs 200.

The accuracy of the torque output of the oil well pipe string hydraulic tongs 200 is calculated based on the output torque value and the bearing torque value, including:

The accuracy value of the oil well tubular hydraulic tongs torque testing system 100 = (1 - (output torque value - absolute value of bearing torque value) / bearing torque value) * 100%.

The accuracy value of the torque output of the oil well tubular hydraulic tongs 200 needs to be greater than or equal to 95%. When the accuracy value of the torque output of the oil well tubular hydraulic tongs 200 is less than 95%, the operator can detect and calibrate the oil well tubular hydraulic tongs 200 according to the accuracy value fed back by the controller 140. Among them, at the points of the output torque value of the oil well tubular hydraulic tongs 200 (for example, 40%, 60% and 80% of the maximum output torque value), the accuracy value of the torque output of the oil well tubular hydraulic tongs 200 needs to be greater than or equal to 96.5%.

It should be noted that when the oil well tubular hydraulic tongs 200 to be calibrated are equipped with an oil well tubular hydraulic tongs torque meter 110 , the oil well tubular hydraulic tongs torque testing system 100 can directly use the oil well tubular hydraulic tongs torque meter 110 .

The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims (15)

An oil well tubular hydraulic tongs torque test system, characterized in that it comprises an oil well tubular hydraulic tongs torque meter, a bearing body, a bearing body torque meter and a controller; The bearing body is used to bear the torque applied by the hydraulic tongs of the oil well pipe string; The oil well tubular hydraulic tongs torque meter is used to be connected to the oil well tubular hydraulic tongs to test at least one output torque value of the oil well tubular hydraulic tongs; The bearing body torque meter is connected to the bearing body to test at least one bearing torque value of the bearing body, wherein the bearing torque value corresponds to the output torque value one by one; The oil well tubular hydraulic tongs torque meter and the bearing body torque meter are both connected to the controller, and the controller is used to obtain and compare the output torque value and the bearing torque value, and obtain the accuracy value of the oil well tubular hydraulic tongs torque output. The oil well tubular hydraulic tongs torque testing system according to claim 1, characterized in that the carrier comprises a first clamping portion and a second clamping portion; The first clamping portion is engaged by the main tongs of the oil well tubular hydraulic tongs and bears the torque applied by the main tongs of the oil well tubular hydraulic tongs; The second clamping portion is engaged by the oil well tubular string hydraulic tongs backup tongs of the oil well tubular string hydraulic tongs. The oil well tubing hydraulic tongs torque testing system according to claim 2 is characterized in that: The oil well tubular hydraulic tongs torque meter comprises a first torque sensor and a first signal processor, wherein the first torque sensor is used to connect to a torque output mechanism in the oil well tubular hydraulic tongs, and the first torque sensor and the controller are both electrically connected to the first signal processor. The oil well tubular hydraulic tongs torque testing system according to claim 3, characterized in that the carrier torque meter comprises a second torque sensor and a second signal processor, the second torque sensor is arranged on the carrier and located between the first clamping part and the second clamping part; The second torque sensor and the controller are both electrically connected to the second signal processor. The oil well tubular hydraulic tongs torque testing system according to claim 4, characterized in that the carrier is a columnar structure, and the carrier is provided with a cavity; Along the axial direction of the carrier, the carrier includes a first end and a second end opposite to each other; The carrier is provided with a first port communicating with the cavity, the first port is located on the end surface of the first end, and the carrier is provided with a second port communicating with the cavity, the second port is located on the end surface of the second end. The oil well tubular hydraulic tongs torque testing system according to claim 5, characterized in that the bearing body torque meter further comprises a torsion angle sensor disposed on the inner surface of the cavity; The torsion angle sensor is signal-connected to the second signal processor, and the second signal processor is configured to calculate the torque value borne by the carrier according to the torsion angle collected by the torsion angle sensor. The oil well tubular hydraulic tongs torque testing system according to claim 6, characterized in that the signal processing system comprises a signal conversion module and a comparison module; The signal conversion module is configured to convert the signals collected by the torque sensor and the torsion angle sensor into a first torque value and a second torque value; The comparison module is configured to obtain an actual error value between the first torque value and the second torque value, and compare it with a preset error value to determine whether the carrier torque meter is accurate. The oil well tubular hydraulic tongs torque testing system according to claim 5, characterized in that the first port is provided with a first protective cover to seal it, and the second port is also provided with a second protective cover to seal it; The first protective cover and the second protective cover are respectively provided with through holes for the signal line to pass through. The oil well tubular hydraulic tongs torque testing system according to claim 8, characterized in that the bearing body torque meter further comprises a third protective cover; The third protective sleeve is sleeved on the outer circumferential surface of the carrier and is located between the first clamping portion and the second clamping portion, and the third protective sleeve covers the second torque sensor. The oil well tubular hydraulic tongs torque testing system according to claim 4, characterized in that the controller comprises a data processor and a display; The data processor is electrically connected to the display; the data processor is used to calculate the precision value of the torque output of the hydraulic tongs of the oil well tubular column, and the display is used to display the precision value of the torque output of the hydraulic tongs of the oil well tubular column. The oil well tubular hydraulic tongs torque testing system according to any one of claims 1 to 10 is characterized in that it also includes a hydraulic pump, which is used to connect to the torque output mechanism in the oil well tubular hydraulic tongs. A method for testing the torque of a hydraulic tong of an oil well tubular column, characterized in that it is used to test the accuracy value of the torque output of the hydraulic tong of an oil well tubular column, and the method for testing the torque of the hydraulic tong of an oil well tubular column comprises: Obtain the output torque value of the hydraulic tongs of the oil well pipe string; Obtain the bearing torque value of the bearing body; The accuracy value of the torque output of the hydraulic tongs of the oil well tubing string is calculated according to the output torque value and the load torque value. The method for testing the torque of the hydraulic tongs of the oil well tubular column according to claim 12 is characterized in that obtaining the output torque value of the hydraulic tongs of the oil well tubular column comprises: A plurality of output torque values uniformly distributed between 0% and 100% of the maximum output torque value of the oil well tubular hydraulic tongs are obtained. The method for testing torque of hydraulic tongs of a tubular column of oil wells according to claim 13, characterized in that the step of obtaining a plurality of output torque values uniformly distributed between 0% and 100% of the maximum output torque value of the hydraulic tongs of the tubular column of oil wells simultaneously comprises: A plurality of the load-bearing torque values corresponding one-to-one to the plurality of the output torque values are obtained. The method for testing the torque of the hydraulic tongs of the oil well tubular column according to any one of claims 12 to 14 is characterized in that the accuracy value of the torque output of the hydraulic tongs of the oil well tubular column is calculated according to the output torque value and the bearing torque value, comprising: The accuracy of the torque output of the oil well tubular hydraulic tongs is equal to (1-(output torque value minus the absolute value of the corresponding load torque value divided by the load torque value))*100%.