RU38815U1 - UPPER DRIVE DRILLING DRIVE - Google Patents

Abstract

The utility model "Top power drive for drilling rigs" refers to the field of engineering, mainly to the field of lifting and drilling equipment, and more specifically to mobile units for the repair of oil and gas wells. The top power drive is designed for drilling oil and gas wells, contains a power swivel with a carriage. mounted on a guide, made on the basis of a high-torque hydraulic motor with a bore in the rotor. The case of the hydraulic motor of the upper power drive is a supporting element, and the rotor of the hydraulic motor provides a direct drive for the rotation of the pipe string; a hydraulic brake built into the hydraulic motor ensures the spring of the pipe string during stopping. The supply of drilling fluid occurs through the hollow shaft of the rotor of the hydraulic motor. In the upper part of the upper power drive there are slings for hanging it on the hook block of the drilling rig and gander for supplying flushing solution while drilling, in the lower part on the upper power drive case there are slings with an elevator for "gripping the pipe from the platform and balcony, the slings have a deflection system with the help of hydraulic cylinders for convenience - capture of a pipe.

Description

1. - The technical field to which the utility model belongs. The inventive model relates to the field of engineering. mainly to the field of lifting and drilling equipment, and more specifically to mobile units for the repair of oil and gas wells.

2. - The prior art.

The design of the upper power drives (VSP) depends on the requirements for the created moment and the necessary load capacity. Information about the various designs and technical characteristics is given in catalogs, reference books and specialized printed publications.

There are various designs of top power drives.

One of the analogues is the upper power drive (utility model patent No. 29551 application No. 2003103536, priority dated February 13, 2003), which includes: a gearbox built into the upper power drive housing, a disk brake and two hydraulic motors. having a variable displacement. By changing the working volume, the rotation speed of the drill pipe string is ensured. The disadvantage of this design is:

- the presence of a gear reducer. This is a complex assembly and the most expensive, it is the main part of the top power drive and increases its weight.

- 2 hydraulic motors, which complicates the control system of hydraulic motors (additional controls are needed: hydraulic and electric).

3. The essence of the claimed utility model

The essence of the claimed utility model "Top power drive for drilling rigs" is. that a hydraulic motor with a through hole in the rotor causes the pipe string to rotate directly from the hollow shaft installed in the slots of the rotor, the solution is supplied through the hollow shaft. The hydromotor is powered by an adjustable pump through a hydraulic distributor. The regulation of the flow of the working fluid by the pump makes it possible to smoothly change the speed in all modes.

Installation of a hydraulic motor on a drill pipe string makes it possible to exclude the gear part from the structure, which allows to reduce the mass of the upper power drive and increase reliability. A spring brake is provided in the hydraulic motor for controlled removal of reactive torque from the string of pipes during drilling.

Designation in the figures 1 - adapter eleven - gander 2 - Top sling 12 - hydraulic cylinders 3 - Lower strop thirteen - carriage 4 - elevator 14 - Section of a lifting installation 5 - Case fifteen - pipe 6 - Gylrogormoz 16 - pipe string 7 - Hydro motor 17 - spider 8 - Val 18 - work site 9 - bearings 19 - Guide of the upper power drive 10 - valve 20 - Top power drive

4. Description of utility model

A high-torque hydraulic motor 7 with a hydraulic brake 6 and a set of three bearings 9 is installed in the welded housing. The bearings 9 absorb axial and radial loads and allow for the rotation of the shaft 8 of the power drive during drilling operations. ("at the top of the housing 5 is installed a gander 11 with a seal assembly for transmitting drilling fluid to the rotating hollow shaft 8.

The rotating shaft 8 of the actuator is equipped with two shut-off valves 10, duplicating each other. One valve is controlled remotely-hydraulically, the second has manual control in case of failure of the first. On the housing 5 of the upper power drive there is a system for attaching the upper and lower slings 2, 3. By the upper slings 2, the power drive is attached to the hook block. Lower slings 3 having a hydraulic deflection system using hydraulic cylinders 12 and equipped with an elevator 4 capture a pipe string 16 when they are supplied from bridges or from the balcony. The upper power drive housing is pivotally connected to the carriage 13, which moves along a guide 19 fixed to the mast of the drilling rig.

Description of the utility model

The operation of the upper power drive (VSP) is shown in FIG. 3.

When the pipe string 16 is located on the spider 17, the upper power drive 20 is lowered by means of a winch to the platform 18, along the slope of which a pipe is fed with the help of an auxiliary winch, rejects the sling 3 with the elevator 4, and captures the fed pipe by the elevator. The top drive 20 rises to the height of the balcony. The pipe 15 is installed in the coupling of the pipe string 16. located on the spider I ⁷ and is screwed with it using a wrench. Then the pipe 15 is freed from the capture of the elevator 4 and the upper part is screwed into the lead pipe of the upper power drive 20. After that, the column is released from the clamp in the spider and the drilling process begins. After completion of the drilling process to a depth equal to the length of the pipe (candle), the pipe string is installed on the spider. The upper power drive by reverse rotation of the hydraulic motor is unscrewed from the pipe (candles? And the work cycle is repeated.

5. Use of utility model

The upper power drive (VSP) is used to rotate the drilling tool, maintaining the weight of the pipe string. performing hoisting operations and supplying drilling fluid to the well as part of well repair facilities driven by a standard hydraulic system of the installation. Compared to rotary drilling, the top power drive reduces the complexity when building the column during drilling and increases labor productivity. When controlling, hydraulic motor control lines are also used.

Top power drive used:

• when drilling wells.

• at the opening of the formation with the expected content in the formation fluid of hydrogen sulfide of more than 6 (volume) percent.

• when you set an angle with a radius of curvature of less than 30 m in directional wells,

• when drilling a horizontal section of a wellbore longer than 300 m in wells deeper than 3000 m.

6. The possibility of implementing the claimed utility model

Pa top power drive (VSP) design documentation is developed.

In 2003, a prototype will be made. Start of serial production is planned for 2004. The top power drive (VSP) will be used in installations for the repair of oil and gas wells with a carrying capacity of 127, 160 tons.

Claims (3)

1. The upper power drive, characterized in that it uses one high-torque hydraulic motor, which is connected via splines to the hollow shaft and the driving pipe. 2. The upper power drive according to claim 1, characterized in that the hollow shaft is located inside the rotor of the hydraulic motor. 3. The upper power drive according to claim 1, characterized in that it has a hydraulic brake integrated in the hydraulic motor controlling a swirling pipe string.