The key pipe hydraulic

 

(57) Abstract:

The invention relates to a device for screwing or unscrewing the threaded connection during drilling and repair of wells. Key hydraulic pipe contains a split housing, a rotary clamping device located in the housing, the hydraulic motor and yoke. It is provided by the retaining device and system for measuring torque, rotational clamping device is made reversible as noted between the rollers open gear with the annular grooves on the upper and lower planes, while its inner surface is located between the two joint flanges, top and bottom, with the guide slots, which are provided for removable gripping head with springs for their forced cultivation, the upper flange is associated with a braking device mounted on the cover of the rotary clamping device, while the rotational locking device to prevent axial and radial displacement of the gear relative to the flanges in the slots installed, and on the flanges of the fixed fingers with rollers, in addition, the key hydraulic pipe provided by the latch on the top flange with vosmojnostei gear and the gear of the motor, fold and hook to provide a power circuit housing of the clamping device, while the flanges have a Zev. The result is a high torque, grip and fixing the entire range of pipe diameters without changing Cams. 1 C.p. f-crystals, 7 Il.

The invention relates to a device for screwing or unscrewing the threaded connection during drilling and repair of wells.

Know the key for screwing-unscrewing drill tool containing split housing located therein a clamping device having a stepped groove and including shafts-gears and Cams, controls to bring the key items in the original position, comprising a lever mounted in the stepped groove of the control limit, and the hydraulic motor, the key is supplied also mounted on the chassis by a hydraulic cylinder and a destination switch, and managing the emphasis made in the form having a cross-section of the diamond rod mounted to rotate on the clamping device and connected through levers with the end switch and cylinder. In addition, to increase ease of use, the key is provided with a head plate, and Cams mounted on leaving the corps, and the United grasses is independent of the device, what affects the inability to use offline this unit, the absence of a closed loop on the clamping device, which does not ensure the reliability of the capture and fixation of pipe diameters.

The objective of the proposed technical solution is to achieve a high torque, grip and fixing the entire range of pipe diameters without changing Cams, eliminating turn when you switch from "breakaway" mode "screwing" and Vice versa, quenching the reactive torque on the key.

For solving the problem in key hydraulic pipe containing a split housing, a rotary clamping device located in the housing, the hydraulic motor and yoke, is provided by the retaining device and system for measuring torque, rotational clamping device is made reversible as noted between the rollers open gear with the annular grooves on the upper and lower planes, while its inner surface is located between the two joint flanges, top and bottom, with the guide slots, which are provided for removable gripping head with springs for forced breeding the upper flange is connected with mormonom device to prevent axial and radial displacement of the gear relative to the flanges in the slots installed, and on the flanges of the fixed fingers with rollers, in addition, the key hydraulic pipe includes a latch on the top flange with the ability to interact with emphasis on the pinion gear, a pair of symmetrical gears interacting with open-gear and the gear of the motor, shutter and hook to provide a power circuit housing of the clamping device, while the flanges have a mouth.

This object is achieved in that the retaining device key hydraulic pipe made in the form of gear resting on the rollers and interacting with three shafts-gears from the Cams, and the ends of the shafts of the gears are closed traverse, while on the bottom plate includes a latch of the specified direction, and a hydraulic cylinder associated with the gear of the locking device and the control node of the locking device.

In Fig. 1 shows the key pipe hydraulic, General view; Fig.2 is a view of a of Fig.1 (rotational clamping device), and Fig.3 - capture mechanism; Fig. 4 - section d-D of Fig.3; Fig.5 - section b-B of Fig.3; Fig.6 - locking device; Fig.7 - section G-G of Fig.1.

Key hydraulic pipe consists of the following main parts: the rotational Sam 3, system for measuring torque 4, motor 5, line warm-up 6 of the motor for operation in winter time, which is a system of pipelines and klinovuyu valve.

Rotary clamping device 1 includes enclosed in the housing 7, the capture mechanism in the form of a gear 8 that is installed between two flanges 9 (top) and 10 (bottom), United by the tie-rods 11. To prevent axial and radial misalignment of the flanges on the upper and lower planes of the gears machined ring grooves. In the slots are installed and fixed on the flanges fingers 12 with rollers 13. The body of the gear 8 has an orifice providing a supply of key to the pipe. In the United flanges 9, 10 has two guide groove (not shown), which are replaceable gripping head 14. For forced breeding on the top flange 9 of the springs 15. The upper flange 9 is in contact with the tape 16 of the braking device 17. The gear has a stop 18, necessary for the operation of the latch 19 to the given direction of motion, mounted on the top flange. When the flanges have a mouth.

A pair of symmetrical gears 20 and 21 are in engagement with the gear 8 and the gear of hydromotive for gear and retainer gear 8. The shutter 24 is required to provide power to the circuit body 7, is installed on the housing by the shaft 25 and consists of a body with the installed hook 26. The brake device 17 is installed on the cover 27 of the clamping device and consists of the brake belt 16 with two tensioning devices 28.

The hydraulic motor 5 is mounted on the lid 27 of the clamping device 1. On the housing of the motor installed: panel 29, valve 30, and two relief valve 31.

The retaining device is designed as a gear 32, which is his ring gear in mesh with three shafts-gears 33 with the Cam 34 on each of them, and cylinder 35 mounted on the bottom plate 36. His rod is fixed on the pinion bearings which are mounted on the axes of the rollers 37 and 38. Gear, shafts-gears, rollers located between the joint pins of the upper 39 and lower plates 36. The ends of the shafts of the gears are closed by a head plate 40. The latch 41 is located on the bottom plate.

The control node of the locking device 3 consists of a panel with a control valve 43 and the high pressure hose 42 to provide a hydraulic connection of the valve with hydraulic cylinder and panel pack the springs, mounted on the guides 49, which includes a number of holes for adjustment of the locking device according to the height.

Replacement set of two gripping heads is chosen depending on the size of the pipe. Each gripping head has a body 44 defined therein a roller 45, the covers 46 and two crackers 47.

For suspension of a key over the mouth of the well is applied yoke 48, which represents the weld metal structure.

The key pipe hydraulic works as follows.

Screwing (unscrewing) the tubing is clamping device 1. Reactive torque arising at the same time, perceived the locking device 2.

In the neutral position spools of the control valves 30 and 43 of the hydraulic power unit connected to the key works on the "drain".

The switching valve 43 from the neutral position, the working fluid is supplied, depending on the screwing or unscrewing, rod or piston cylinder chamber 35. The piston rod of the hydraulic cylinder through the gear 32 and shaft-gear 33 rotates the Cams 34, which threatens the stationary pipe. Freedom of rotation at the right is the same. The switching valve 30 from the neutral position, the working fluid is in corresponding to the screwing or unscrewing the cavity of the motor. By means of gears comprising gears 20 and 21, the torque from the motor is transmitted to the gear 8. The flanges of the gear 8 at this time held against rotation braking device. Freedom of rotation in the desired direction, the gear 8 receives the translation of the latch 19 in position specified on the top flange.

Gripping head 14 before the beginning of operations by screwing or unscrewing divorced springs. When turning the gear 8 moves the gripping head in the direction of the pipe to contact crackers with its surface. In response to the resistance of the pipe surface further movement of the gripping heads in the hydraulic system increases the pressure increasing torque gear 8, up to a point sufficient to disrupt the flanges of the tape brake device. After that, the gear 8 rotates together with the joint flanges, through the process of screwing or unscrewing the threaded connection.

To limit the torque of the clamping device, in zavistlivye 31, excluding the possibility of obtaining a torque wrench is more valid. Control of torque during operation screwing (unscrewing) the tubing - visual - scale momentaner 4.

After the process is completed by screwing (unscrewing) of the pipe string, the handle of the valve 30 is translated in the opposite position. The hydraulic motor 5 and the gear 8 rotates in the opposite direction. Release the gripping head springs are discharged from the pipe surface. When the lock pin 18 in the retainer 19 Zev gear and Zev flanges combined. Transfer arm valve 30 to the neutral position when a match is shed gear capture mechanism with similar maw rotational clamping unit rotating mechanism of capture is terminated.

The switching valve 43, the working fluid is in the opposite the beginning of the operation of screwing up (unscrewing) the cylinder chamber 35. Gear 32 of the locking device 2 is turned to its original position, limited by the latch 41, and the Cams 34 releases the string of pipe.

Sources of information

1. USSR author's certificate N 1430246, MCI 25 In my case, rotary clamping device located in the housing, the hydraulic motor and yoke, characterized in that it is provided by the retaining device and system for measuring torque, rotational clamping device is made reversible as noted between the rollers open gear with the annular grooves on the upper and lower planes, while its inner surface is located between the two joint flanges, top and bottom, with the guide slots, which are provided for removable gripping head with springs for their forced cultivation, the upper flange is associated with a braking device mounted on the cover of the rotary clamping device, at the same time, the rotational locking device to prevent axial and radial displacement of the gear relative to the flanges in the slots installed, and the flanges are fixed fingers with rollers, in addition, the key hydraulic pipe provided by the latch on the top flange with the ability to interact with emphasis on the pinion gear, a pair of symmetrical gears interacting with open-gear and the gear of the motor, shutter and hook to provide a power circuit housing Saginov the locking device is designed as a gear, based on the videos and interacting with three shafts-gears from the Cams, and the ends of the shafts of the gears are closed traverse, while on the bottom plate includes a latch of the specified direction, and a hydraulic cylinder associated with the gear of the locking device and the control node of the locking device.

 

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