SU1601323A1 - Device for screwing on and off protection rings - Google Patents

Abstract

The invention relates to the drilling of wells. The goal is to expand the functionality and improve the operating conditions of the device. The device contains a drive, kinematically connected with it a worm gearbox 2, on the output shaft of which a key is mounted. The device has a carrier 6 with a double-sided cam 20 installed with the possibility of axial movement and fixation in two extreme positions by means of a spring-loaded ball 7 and two annular recesses, and the key is made in the form of a holder 8, in which a gear 10 is installed in the central bore pairs of toothed racks 11 and 12 located in mutually perpendicular planes in the slots of the yoke. At the same time, the gear interacts with the inner spline crown of the yoke 8. One pair of toothed racks 11 has stops at its ends that interact with the face and internal surfaces of the ring, and the other have hinges with grips 14 with compression springs 15 that interact with the internal surface of the ring and double-sided cam 20 When the gear 10 is rotated, the rails 11 and 12 are extended to the desired diameter of the screwable protective ring 19 until the stops of the rails 11 are close to the front or inner surface of the ring 19. Then the clip 8 into zvraschayut place. The crown 16 of the gear 10 is engaged with the inner splines of the holder 8, rigidly fixing the position of the stops and grippers 14. 4 Il.

Description

75

Y /// 7/7 ///.

P

Aa

F

(L

05

with y

with

Phage. 2

K4 slot grooves, and the key is made in the form of a clip 8, in the central bore of which gear 10 is installed, connected with two pairs of gear racks 11 and 12, located in mutually perpendicular planes Tsix in the slots of the clip. At the same time, the gear interacts with the inner spline crown of the cage 8. One pair of toothed racks 1 | has stops at the ends, interacting with the face and inner surfaces of the ring, and at another pivotally fitting the grippers 14 with preload springs 15,

 The invention relates to drilling, in particular, to devices associated with the manufacture and operation of drilling, casing and tubing, in particular for unscrewing and screwing in protective 1 | olec and nipples.

A: The purpose of the invention is to expand the functional capabilities and improve the operating conditions of the device. FIG. 1 shows the device, the structure; in fig. 2 shows section A-A in FIG. one; | ia of FIG. 3 shows a section BB in FIG. 2; in fig. 4 is a view of B in FIG. 2.: The device includes a drive and a key (Fig. 1). The drive is made in the form of an engine 1 and a worm gearbox 2 kinematically connected with it, mounted in housing 3 and handle 4. At the output shaft of the gear reducer 2, it is mounted on ujnoH-5 with axial movement of the carrier 6, fixed in two extreme positions by means of a spring-loaded ball 7 installed in the radial bore of the output shaft of the worm gearbox 2 and two annular bores on the inner seating surface of the carrier 6. The key is made in the form of a cage 8 (Fig. 2) consisting of two rigidly connected between parts (bolted 9), in the central bore of which gear 10 is mounted, and in the mechanical grooves there are two pairs of gear racks 11 and 12 (Fig. 3), which are arranged in mutually perpendicular directions and are in engagement with gear 10, moreover, the rails 11 have stops 13 in the form of protrusions at the ends, and at the ends of the rails 12, clamps 14 are pivotally mounted (Fig. 4), on whose axes the springs 15 of the initial preload (torsion) are mounted, pressing the ends of the clamps 14 to the carrier 6. Gear wheel 10 performed with a splined crown 16, interacting with the inner and the splines of the holder 8. To the end ui (ring crown 16, gear 10 is riveted with locking ring 17, gear 10 is mounted on the carrier 6 and fixed on it by a spring ring 18 located in bores interacting with the inner surface of the ring and a double-sided cam 20. When turning gear 10, they push rails And and 12 on the desired diameter of the screwable protective ring 19 until the stops of the rails 11 are close to the end or inner surface of the ring 19. Then the sleeve 8 is returned to its place. The crown 16 of the gear 10 engages with the inner slots of the holder 8, rigidly

fix the position of the lugs and grips 14. 4.

gear pin 10. The carrier 6 is made with a double-sided cam for contact with the grippers 14.

The device works as follows.

Manually adjusting the device to the diameter of unscrewing protective rings 19 or nipples, for which, holding the retaining ring 17, move the sleeve 8 along the carrier 6 along the carrier 6, while the spring-loaded ball 7 drops into the right annular groove of the carrier 6, and the gear spline 10 out of engagement with the splines of the casing 8. After which the 0 fixing ring 17 is turned, and with it the gear 10, the gear racks I and 12 are turned by the required diameter of the screwable protective ring or nipple 19 until the stops 13 of the gear racks 11 not near:} t-s to the face and inner surface of the ring (nipple). The sleeve 8 is then returned to its place, while the split-ring crown 16 of the gear 10 engages with the inner splines of the sleeve 8, rigidly fixing the position of the stops 13 and the claws 14. To loosen the ring 19 (nipple), 0 stops 13 and the clamps 14 are inserted inside the ring 19 (nipple), pressing the ends of the gear racks 11 and 12 to the end of the ring 19. The engine 1 is turned on, giving the carrier 6 a left-hand rotation, at the same time the holder 8 with the racks 11 and 12 remains stationary and the carrier 6 turns the grippers 14 on the axes, and, twisting the spring 15, wedges the working sections of the grippers 14 on the inner surface of the ring 19 (nipple), then the rotation of the carrier 6 is transferred to the holder 8 and through the grips 14 when it contacts with the double-sided cam 20 - to the protective ring 19, unscrewing it. After the end of unscrewing, the engine 1 is turned off, the ring 19 is removed from the stops 13 and the claws 14, while the springs 15 return 55 the holder 8 and the clamps 14 to their original position.

The device is equipped with three keys, each of which is designed for a defined 45

a wide range of pipe diameters. Adjusting the key to a specific diameter of the rings within one range is done by rotating the ring 17. The transition to another range of pipe diameters is accomplished by replacing the key, which is easily removed from the drive shaft with the planet carrier 6 and replaced with the key corresponding to the new range of pipes.

For screwing the rings (nipples) onto the pipe, all operations are repeated in the sequence indicated above, only the right rotation is applied to the engine.

Claims (1)

Invention Formula A device for unscrewing and screwing in protective rings and nipples, containing kinematically interconnected drive, a worm gear with a shaft and a key, characterized in that, in order to enhance the functionality and improve the conditions of operation, it is provided with a carrier with a double-sided cam, usC mounted on the shaft of a worm gearbox with the possibility of axial movement and fixation in extreme positions, gear with large and small outer splined rims mounted on the carrier and two pairs of gear racks, the key is made in the form of a yoke of two rigidly interconnected parts with an internal a spline crown for engagement with a large outer splined crown of the gear, end grooves, and a central bore, with the gear installed in the central bore, and its small crown is connected with two pairs of gear racks, located mutually perpendicular directions in 5 end grooves of the cage, one pair of toothed racks made with stops at the ends for engagement with the inner and end surface of the rings and nipples, and at the other pair of toothed rails hingedly mounted with the springs of the initial preload, grips for interacting with the inner surface of the rings and nipples when contacting the arms with a double-sided cam carrier. 0 Fi.g.1 AT 6 J5