CN111677706B - A hydraulic control system for a hydraulic pumping unit - Google Patents
A hydraulic control system for a hydraulic pumping unit Download PDFInfo
- Publication number
- CN111677706B CN111677706B CN202010757652.5A CN202010757652A CN111677706B CN 111677706 B CN111677706 B CN 111677706B CN 202010757652 A CN202010757652 A CN 202010757652A CN 111677706 B CN111677706 B CN 111677706B
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- pumping unit
- pump motor
- variable pump
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005086 pumping Methods 0.000 title claims abstract description 103
- 239000003921 oil Substances 0.000 claims abstract description 81
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 52
- 238000001816 cooling Methods 0.000 claims abstract description 48
- 238000006073 displacement reaction Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims description 45
- 230000002441 reversible effect Effects 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 14
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000003129 oil well Substances 0.000 description 9
- 238000000605 extraction Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/042—Controlling the temperature of the fluid
- F15B21/0423—Cooling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/129—Adaptations of down-hole pump systems powered by fluid supplied from outside the borehole
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/265—Control of multiple pressure sources
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic control system of a hydraulic pumping unit, which comprises a main hydraulic system and a cooling system. The first variable pump motor and the second variable pump motor alternately work as a motor and a pump, when the first variable pump motor is driven by hydraulic oil, the first variable pump motor and the main motor jointly drive the second variable pump motor to supply oil outwards as a pump, when the second variable pump motor is driven by hydraulic oil, the second variable pump motor and the main motor jointly drive the first variable pump motor to supply oil outwards as a pump, hydraulic elements of the system are reduced, the energy consumption is low, each cycle of hydraulic oil can be cooled by the hydraulic oil through an oil tank and an independent cooling system, the double-connection variable plunger pump motor can realize closed-loop control of working mode and displacement, the descending energy of a hydraulic pumping unit is fully utilized, and the power consumption of the pumping unit is greatly reduced.
Description
Technical Field
The invention relates to a hydraulic control system, in particular to a hydraulic control system of a hydraulic pumping unit.
Background
The prior main force army in the field of oil extraction operation of the oil field in China is the traditional beam pumping unit, the liquid supply capacity of the stratum becomes worse and worse along with the continuous oil extraction operation of the oil field, the pumping unit is deeper and deeper, the problems of high power consumption, difficult adjustment of stroke times, unsuitability for thickened oil extraction and the like are exposed, and the traditional pumping unit also has the problems of large occupied area, large weight and the like.
Compared with a beam pumping unit, the hydraulic pumping unit has the advantages of compact structure, light weight, low manufacturing cost, stable operation, easy realization of long stroke, convenient stroke frequency adjustment, easy realization of safety protection, obvious energy-saving effect and the like, and is particularly suitable for oil extraction operation in mountain areas, beaches and offshore platforms. Therefore, engineering technicians in various countries are devoted to the development and the development of the hydraulic pumping unit, so that the hydraulic pumping unit is popularized and applied in a larger range and has better economic benefit. The research developed in the aspect of the hydraulic pumping unit in China is mainly focused on the development of a principle prototype and a test prototype, and is really applied to the actual production of oil extraction operation sites. The main reasons include that the hydraulic pumping unit of ① hydraulic system adopts common switch valve, proportional valve to control hydraulic cylinder or hydraulic motor, there is larger throttling energy loss, and the recovery rate of energy is not high, and is not approved by user, the hydraulic system for ② multi-well needs all wells to stop running when one well has problem, and affects the productivity of oil field, the hydraulic system for ③ multi-well has similar stroke and load to the multi-well hydraulic pumping unit, and the requirement is higher, and even when the difference of stroke lengths of the multi-well is larger, the energy can not be collected, causing extra power consumption.
Disclosure of Invention
The invention aims at overcoming the defects in the prior art, and provides a hydraulic control system of a hydraulic pumping unit, which can reduce the energy consumption of the hydraulic system of the hydraulic pumping unit, enhance the adaptability of the hydraulic system and improve the energy-saving effect of the hydraulic pumping unit.
The technical scheme of the invention is that the hydraulic control system of the hydraulic pumping unit comprises:
The system comprises a main hydraulic system, a first variable pump motor, a second variable pump motor, a first hydraulic system and a second hydraulic system, wherein the main hydraulic system comprises a main motor, a duplex pump motor and an energy accumulator, the duplex pump motor comprises a first variable pump motor and a second variable pump motor which are mutually connected in series, and output shafts of the main motor are connected with input ends of the first variable pump motor and the second variable pump motor; the oil port at one end of the second variable pump motor is connected with the oil tank, the oil port at the other end of the second variable pump motor is provided with a third liquid path and a fourth liquid path, the fourth liquid path is connected with the lower chamber of the second pumping unit liquid cylinder, and reversing valves are respectively arranged on the first liquid path, the second liquid path, the third liquid path and the fourth liquid path;
The cooling system comprises a temperature sensor arranged in the oil tank and a cooling device arranged on a cooling circuit, and an inlet and an outlet of the cooling circuit are connected with the oil tank;
When the first variable pump motor is driven by hydraulic oil, the first variable pump motor and the main motor jointly drive the second variable pump motor to serve as a pump for supplying oil outwards, and when the second variable pump motor is driven by hydraulic oil, the second variable pump motor and the main motor jointly drive the first variable pump motor to serve as a pump for supplying oil outwards.
Preferably, the cooling device comprises a cooling pump, a cooler and an oil return filter which are sequentially arranged on the cooling loop, wherein the power input end of the cooling pump is connected with a cooling motor, and the liquid input end of the cooling pump is connected with an oil tank.
Preferably, a first high-pressure filter is arranged between the reversing valve in the first liquid path and the lower chamber of the first pumping unit liquid cylinder, and a second high-pressure filter is arranged between the reversing valve in the third liquid path and the lower chamber of the second pumping unit liquid cylinder.
Preferably, the main hydraulic system further comprises pressure sensors for measuring hydraulic oil pressure of the lower cavity of the first pumping unit hydraulic cylinder, the lower cavity of the second pumping unit hydraulic cylinder and the energy accumulator, and displacement sensors are respectively arranged in the first pumping unit hydraulic cylinder and the second pumping unit hydraulic cylinder.
Preferably, the hydraulic control system further comprises a programmable controller electrically connected with the pressure sensor, the displacement sensor, the temperature sensor, the first variable pump motor and the second variable pump motor, respectively.
Preferably, the model of the programmable controller is SIMATIC S7-1200.
Preferably, the first variable displacement pump motor and the second variable displacement pump motor are variable displacement plunger pump motors.
Preferably, the lower cavity of the first pumping unit hydraulic cylinder, the lower cavity of the second pumping unit hydraulic cylinder and the accumulator are all provided with pressure release valves for releasing hydraulic oil.
Preferably, the pressure gauges for displaying the hydraulic oil pressure of the hydraulic oil are arranged on the lower cavity of the first oil pumping unit hydraulic cylinder, the lower cavity of the second oil pumping unit hydraulic cylinder and the energy accumulator.
Preferably, the first high-pressure filter and the second high-pressure filter are bidirectional reversible filters, the reversing valve is a two-position two-way electromagnetic reversing valve, and the displacement sensor is a stay cord displacement sensor.
Compared with the prior art, the hydraulic oil pump has the advantages that the hydraulic oil in each cycle passes through the oil tank, the independent cooling system is added, the cooling of the hydraulic oil can be realized more effectively, the operation effect of the hydraulic system and the oil cylinder of the oil pumping machine is guaranteed, the ② double-variable plunger pump motor can realize the closed-loop control of the working mode and the displacement, not only can the descending energy of the hydraulic oil pumping machine be fully utilized, but also the power consumption of the oil pumping machine is greatly reduced, and independent hydraulic elements for speed regulation, pressure regulation and frequent reversing are not needed, the hydraulic impact of the system is avoided, the hydraulic elements are few, the throttling loss is less, the energy consumption is low, the ③ is suitable for the working mode of single well and multiple wells, the double well can be switched to the single well on line, the maintenance of the single well can not influence the normal work of other wells, and when the ④ double well works, the stroke and the oil quantity of the two hydraulic oil pumping machines are not required, and the adaptability is strong.
Drawings
FIG. 1 is a structural flow diagram of the present invention;
FIG. 2 is a schematic diagram of a dual well operation of an embodiment of the present invention;
FIG. 3 is a schematic diagram of a three-well operation of an embodiment of the present invention.
In the drawings, a main hydraulic system, 2, a cooling system, 101, a tank, 102, a level sensor, 103, an air cleaner, 1041, a first variable displacement pump motor, 1042, a second variable displacement pump motor, 105, a main motor, 1061, a reversing valve, 1062, a reversing valve, B,1063, a reversing valve, C,1064, a reversing valve, D,1071, a pressure gauge, 1072, a pressure gauge, B,1073, a pressure gauge, C,1081, a pressure sensor, 1082, a pressure sensor, B,1083, a pressure sensor, C,109, an accumulator, 1101, a first high pressure filter, 1102, a second high pressure filter, 1111, a pressure relief valve, A,1112, a pressure relief valve, B,1113, C,1121, a first pumping unit cylinder, 1122, a second pumping unit cylinder, 1131, a displacement sensor, 1132, a displacement sensor, B,201, a cooling pump, 202, a cooling motor, 203, a cooler, 204, an oil return filter, 205, and a temperature sensor.
Detailed Description
The invention is further illustrated by the following examples in connection with the accompanying drawings.
Example 1
Referring to fig. 1, a hydraulic control system of a hydraulic pumping unit includes a main hydraulic system 1 and a cooling system 2.
The main hydraulic system includes a main motor 105, a dual pump motor and an accumulator 109, where the dual pump motor includes a first variable pump motor 1041 and a second variable pump motor 1042 that are connected in series, and output shafts of the main motor 105 are connected with input ends of the first variable pump motor 1041 and the second variable pump motor 1042, that is, the first variable pump motor 1041 and the second variable pump motor 1042 are connected with a rotating main shaft of the main motor 105 through a common rotating main shaft. The first variable displacement pump motor 1041 and the second variable displacement pump motor 1042 both select variable displacement plunger pump motors, and the variable displacement plunger pump motors can be used as pumps (i.e. drive by power such as a motor to discharge hydraulic oil) or motors (i.e. convert hydraulic pressure energy into torque and rotational speed for external output).
An oil port at one end of the first variable pump motor 1041 is connected with the oil tank 101, an oil port at the other end of the first variable pump motor 1041 is provided with a first liquid path and a second liquid path, the first liquid path is connected with a lower cavity of the first pumping unit liquid cylinder 1121, the second liquid path is connected with the energy accumulator 109, an oil port at one end of the second variable pump motor 1042 is connected with the oil tank 101, an oil port at the other end of the second variable pump motor 1042 is provided with a third liquid path and a fourth liquid path, the third liquid path is connected with a lower cavity of the second pumping unit liquid cylinder 1122, the fourth liquid path is connected with the energy accumulator 109, and a reversing valve A1061, a reversing valve B1062, a reversing valve C1063 and a reversing valve D1064 are respectively arranged on the first liquid path, the second liquid path, the third liquid path and the fourth liquid path. The hydraulic pump comprises a first hydraulic path sequentially connected with a reversing valve B1062, a first high-pressure filter 1101 and a lower chamber of a first pumping unit hydraulic cylinder 1121, a second hydraulic path sequentially connected with a reversing valve A1061 and an accumulator 109, a third hydraulic path sequentially connected with a reversing valve C1063, a second high-pressure filter 1102 and a lower chamber of a second pumping unit hydraulic cylinder 1122, and a fourth hydraulic path sequentially connected with a reversing valve D1064 and an accumulator 109.
The cooling system comprises a temperature sensor 205 arranged in the oil tank 101 and a cooling device arranged on a cooling circuit, both the inlet and the outlet of which are connected to the oil tank 101.
When the first variable pump motor 1041 is driven by hydraulic oil, the first variable pump motor 1041 and the main motor 105 jointly drive the second variable pump motor 1042 to supply oil as a pump, and when the second variable pump motor 1042 is driven by hydraulic oil, the second variable pump motor 1042 and the main motor 105 jointly drive the first variable pump motor 1041 to supply oil as a pump.
The cooling device comprises a cooling pump 201, a cooler 203 and an oil return filter 204 which are sequentially arranged on a cooling circuit, wherein the power input end of the cooling pump 201 is connected with a cooling motor 202, and the liquid input end of the cooling pump 201 is connected with an oil tank 101. The cooling pump 201 sucks the hydraulic oil in the oil tank 101, pressurizes the hydraulic oil, passes through the cooler 203 and the return filter 204 in this order, and returns to the oil tank 101. The cooling system adopts a forced air cooling mode to cool the hydraulic oil.
In addition, the reversing valves A1061, B1062, C1063 and D1064 are two-position two-way electromagnetic reversing valves, and are in a liquid path disconnection state when the electromagnetic reversing valves are not electrified and in a liquid path communication state when the electromagnetic reversing valves are electrified. The main hydraulic system 1 is provided with a pressure gauge A1071, a pressure gauge B1072 and a pressure gauge C1073 which are respectively used for displaying the hydraulic oil pressure of hydraulic oil in the lower cavity of the first pumping unit hydraulic cylinder 1121, the lower cavity of the second pumping unit hydraulic cylinder 1122 and the accumulator 109, and is provided with a pressure release valve A1111, a pressure release valve B1112 and a pressure release valve C1113 which are respectively used for releasing the hydraulic oil in the lower cavity of the first pumping unit hydraulic cylinder 1121, the lower cavity of the second pumping unit hydraulic cylinder 1122 and the accumulator 109. The high pressure filter selects a bi-directional reversible filter. An air cleaner 103 is mounted on the upper end of the oil tank 101.
The pressure sensor A1081, the pressure sensor B1082 and the pressure sensor C1083 are respectively used for measuring the hydraulic oil pressure of the hydraulic oil in the lower cavity of the first pumping unit hydraulic cylinder 1121, the lower cavity of the second pumping unit hydraulic cylinder 1122 and the energy accumulator 109, and the first pumping unit hydraulic cylinder 1121 and the second pumping unit hydraulic cylinder 1122 are respectively provided with a displacement sensor A1131 and a displacement sensor B1132 which are respectively used for measuring the displacement of a hydraulic cylinder piston and are stay rope displacement sensors;
The hydraulic control system further includes a programmable controller, which may be a PLC programmable controller, electrically connected to the pressure sensor, the displacement sensor, the temperature sensor 205, the first variable pump motor 1041, and the second variable pump motor 1042, respectively. The model of the programmable controller is SIMATIC S7-1200. The hydraulic system can monitor the oil pressure, temperature, liquid level, displacement of the piston of the hydraulic cylinder and the electric parameters of the variable pump motor in real time, and control the start and stop of the main hydraulic system 1 and the cooling system 2, the working states of the electromagnetic directional valves, the working modes and the displacement of the first variable pump motor 1041 and the second variable pump motor 1042.
Example two
This embodiment is an embodiment of a hydraulic control system of a hydraulic pumping unit for double well operation, as shown in fig. 2. The double-well work is that a set of hydraulic pumping unit hydraulic control system simultaneously provides hydraulic sources for the hydraulic pumping units of two wells, at the moment, the second liquid path and the fourth liquid path of the hydraulic control system do not participate in the work, the reversing valve A1061 and the reversing valve D1064 are placed in a liquid path disconnection state, and the reversing valve B1062 and the reversing valve C1063 are placed in a liquid path connection state.
When the first oil well sucker rod descends, the piston rod of the first oil pumping unit hydraulic cylinder 1121 is driven to descend, and after hydraulic oil in the lower cavity of the first oil pumping unit hydraulic cylinder 1121 passes through the first high-pressure filter 1101 and the reversing valve B1062, the first variable pump motor 1041 is driven to rotate and the second variable pump motor 1042 is driven by the main motor 105 together to supply oil outwards in a pump mode. The hydraulic oil passing through the first variable pump motor 1041 does work and returns to the oil tank 101, the hydraulic oil sucked and pumped by the second variable pump motor 1042 from the oil tank 101 sequentially passes through the reversing valve C1063 and the second high-pressure filter 1102 to reach the lower chamber of the second pumping unit hydraulic cylinder 1122, and the piston rod of the second pumping unit hydraulic cylinder 1122 is pushed to drive the pumping rod of the second oil well to ascend, so that one-time oil lifting of the second oil well is completed.
When the second oil well sucker rod descends, the piston rod of the second oil pumping unit hydraulic cylinder 1122 is driven to descend, hydraulic oil in the lower cavity of the second oil pumping unit hydraulic cylinder 1122 drives the second variable pump motor 1042 to rotate through the second high-pressure filter 1102 and the reversing valve C1063, and the second variable pump motor 1041 is driven by the second variable pump motor together with the main motor 105 to supply oil outwards in a pump mode. The hydraulic oil passing through the second variable pump motor 1042 is returned to the oil tank 101 after acting, the hydraulic oil sucked from the oil tank 101 by the first variable pump motor 1041 then pumped out sequentially passes through the reversing valve B1062 and the first high-pressure filter 1101 to reach the lower chamber of the first pumping unit hydraulic cylinder 1121, and the piston rod of the first pumping unit hydraulic cylinder 1121 is pushed to drive the pumping rod of the first oil well to ascend, so that one-time oil lifting of the first oil well is completed.
The automatic control device can monitor the oil pressure, temperature, liquid level, displacement of the piston of the hydraulic cylinder and the electric parameters of the variable pump motor in real time, and control the start and stop of the cooling system 2, the working state of the electromagnetic reversing valve, the working mode and displacement of the variable pump motor. The automatic control device automatically starts and stops the cooling system 2 according to the set range of the hydraulic oil temperature, and controls the hydraulic oil temperature in the oil tank 101 within the target temperature range. The automatic control device automatically matches the displacement of the variable pump motor and the motor rotation speed according to the hydraulic oil pressure in the lower chamber of the first pumping unit hydraulic cylinder 1121 and the lower chamber of the second pumping unit hydraulic cylinder 1122, and the displacement of the piston of the first pumping unit hydraulic cylinder 1121 and the displacement of the piston of the second pumping unit hydraulic cylinder 1122, so that the descending gravity of the pumping rod can be utilized to the greatest extent, and the purpose of energy conservation is achieved.
Example III
This embodiment is an embodiment of a hydraulic control system of a hydraulic pumping unit for single well operation, as shown in fig. 3. In the double-well working process, when one well needs to be operated and maintained, one well needs to be stopped for operation, and the other well needs to maintain normal oil extraction operation, and in the embodiment, compared with the second embodiment, the second oil pumping unit is stopped, and the first oil pumping unit is continuously operated. At this time, only the reversing valve a1061 and the reversing valve C1063 are required to be placed in the liquid path disconnected state, and the reversing valve B1062 and the reversing valve D1064 are required to be placed in the liquid path connected state, so that the first liquid path and the fourth liquid path participate in the work, and the second liquid path and the third liquid path do not participate in the work.
When the first oil well sucker rod descends, the piston rod of the first oil pumping unit hydraulic cylinder 1121 is driven to descend, hydraulic oil in the lower cavity of the first oil pumping unit hydraulic cylinder 1121 passes through the first high-pressure filter 1101 and the reversing valve B1062 to drive the first variable pump motor 1041 to rotate, and the first variable pump motor and the main motor 105 together drive the second variable pump motor 1042 to supply oil outwards in a pump mode. The hydraulic oil passing through the first variable pump motor 1041 is returned to the oil tank 101 after working, and the hydraulic oil sucked and pumped from the oil tank 101 by the second variable pump motor 1042 passes through the directional valve D1064 to reach the accumulator 109. After the piston rod of the first pumping unit hydraulic cylinder 1121 falls to the lowest point, hydraulic oil in the accumulator 109 passes through the reversing valve D1064 and drives the second variable pump motor 1042 to rotate, and the second variable pump motor 1041 is driven by the main motor 105 together to supply oil outwards in a pump mode. The hydraulic oil passing through the second variable pump motor 1042 is returned to the oil tank 101 after acting, the hydraulic oil sucked from the oil tank 101 by the first variable pump motor 1041 then pumped out sequentially passes through the reversing valve B1062 and the first high-pressure filter 1101 to reach the lower chamber of the first pumping unit hydraulic cylinder 1121, and the piston rod of the first pumping unit hydraulic cylinder 1121 is pushed to drive the pumping rod of the first oil well to ascend, so that one-time oil lifting of the first oil well is completed.
The automatic control device monitors the oil pressure, temperature, liquid level, displacement of the piston of the hydraulic cylinder and electric parameters of the variable pump motor in real time, and controls the start and stop of the main hydraulic system 1 and the cooling system 2, the working state of the reversing valve, the working mode and the displacement of the variable pump motor. The automatic control device automatically starts and stops the cooling system 2 according to the set range of the hydraulic oil temperature, and controls the hydraulic oil temperature in the oil tank 101 within the target temperature range. The automatic control device automatically matches the displacement of the variable pump motor and the motor speed according to the lower cavity of the first pumping unit hydraulic cylinder 1121 and the pressure of hydraulic oil in the accumulator 109 and the displacement of the piston of the first pumping unit hydraulic cylinder 1121, so that the descending gravity of the pumping rod can be utilized to the greatest extent, and the purpose of energy conservation is achieved.
In the embodiment, in the normal working process, the reversing valve is in a connection or disconnection state, so that the situation of frequent reversing does not exist, and hydraulic impact of the system is avoided.
The system has the advantages of reduced hydraulic elements and low energy consumption, the cooling of the hydraulic oil can be more effectively realized by adding an independent cooling system to each circulating cycle of the hydraulic oil through the oil tank, the double-connection variable plunger pump motor can realize the closed-loop control of the working mode and the displacement, the descending energy of the hydraulic pumping unit is fully utilized, and the power consumption of the pumping unit is greatly reduced.
The present invention is not limited to the above-described embodiments, and various changes may be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the contents after the changes still fall within the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010757652.5A CN111677706B (en) | 2020-07-31 | 2020-07-31 | A hydraulic control system for a hydraulic pumping unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010757652.5A CN111677706B (en) | 2020-07-31 | 2020-07-31 | A hydraulic control system for a hydraulic pumping unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111677706A CN111677706A (en) | 2020-09-18 |
| CN111677706B true CN111677706B (en) | 2025-01-07 |
Family
ID=72438449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010757652.5A Active CN111677706B (en) | 2020-07-31 | 2020-07-31 | A hydraulic control system for a hydraulic pumping unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111677706B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114962395B (en) * | 2022-07-13 | 2023-02-28 | 北京航空航天大学 | A hybrid new energy hydraulic pumping unit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212225644U (en) * | 2020-07-31 | 2020-12-25 | 山东巨能液压机械有限公司 | A hydraulic control system for a hydraulic pumping unit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203383788U (en) * | 2013-04-27 | 2014-01-08 | 王文雯 | Flywheel energy-saving hydraulic pumping unit |
| CN104141644B (en) * | 2013-05-10 | 2017-12-15 | 博世力士乐（常州）有限公司 | The power unit of hydraulic oil pumping unit and corresponding hydraulic oil pumping unit |
| CN108425893B (en) * | 2018-04-17 | 2023-11-17 | 福建工程学院 | Hydraulic system of distributed direct-driven excavator with servo motor driven double variable pumps |
| CN111120429A (en) * | 2019-12-20 | 2020-05-08 | 燕山大学 | An Asymmetric Cylinder Hydraulic Power Unit |
-
2020
- 2020-07-31 CN CN202010757652.5A patent/CN111677706B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212225644U (en) * | 2020-07-31 | 2020-12-25 | 山东巨能液压机械有限公司 | A hydraulic control system for a hydraulic pumping unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111677706A (en) | 2020-09-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101638980B (en) | Full-balance hydraulic transmission oil sucking machine | |
| CN105715597B (en) | Constant backpressure Direct Drive Electro-hydraulic Servo System and its control method | |
| CN202055807U (en) | Hydraulic twin-well oil pumping unit utilizing back pressure of closed loop | |
| CN113306194B (en) | A press hydraulic system with energy saving, high efficiency and low noise | |
| CN105502234B (en) | Adjustable speed high thrust hydraulic elevator platform | |
| WO2014180322A1 (en) | Power unit of hydraulic pumping unit and corresponding hydraulic pumping unit | |
| CN203383788U (en) | Flywheel energy-saving hydraulic pumping unit | |
| CN101592026A (en) | A new type of energy-saving hydraulic pumping unit | |
| CN1325756C (en) | Enclosed return circuit hydraulic beam-pumping unit utilizing frequency conversion technology | |
| CN111677706B (en) | A hydraulic control system for a hydraulic pumping unit | |
| CN205446224U (en) | Formula electricity liquid servo is directly driven to invariable backpressure | |
| CN102434127A (en) | Pulsating reciprocating hydraulic oil pumping unit | |
| CN103671306A (en) | Hydraulic power device and potential energy converting and operating methods thereof | |
| CN105114392B (en) | A kind of oil cylinder, the closed Hydraulic system and control method using the oil cylinder | |
| CN202007654U (en) | Hydraulic pumping unit with pressure compensation device | |
| CN101082334A (en) | General beam type secondary regulation hydraulic energy saving system of secondary regulation | |
| CN103742490A (en) | Hybrid pumping unit | |
| CN217401077U (en) | Electric cylinder driven liquid injection pumping device | |
| CN212225644U (en) | A hydraulic control system for a hydraulic pumping unit | |
| CN111677705B (en) | Hydraulic pumping unit with hydraulic control system | |
| CN212297077U (en) | A hydraulic pumping unit with hydraulic control system | |
| CN105240241A (en) | Full-hydraulic modularized fracturing pump | |
| CN203939795U (en) | Hydraulic power unit | |
| CN207131569U (en) | A kind of water pump of stable work in work | |
| CN115977583A (en) | Multifunctional hydraulic pumping unit and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |