SU657166A1 - Device for lowering-raising operations in boreholes - Google Patents

Description

one

The invention relates to equipment for launching and lifting operations in wells, in particular, to devices for launching multi-instrument seismic probes, each device of which is equipped with a clamp with a follow-up mechanism, revealing the clamping device with a slight rise.

A device for tripping in wells, containing a drilling rig with crown, made in the form of a three-stage mechanism P.

However, the known device has the disadvantage that it will not allow the descent of multi-instrument probes.

A device for tripping operations in wells is known, comprising a block-balance roller, a stand and guide rollers 2.

The known device has the disadvantage that it is suitable for lowering into the well only multi-instrument probes, the instruments of which do not have an individual locking clamp, since they allow a slight rise in the instruments already in the well and the premature opening of their clamps.

The purpose of the invention is to increase the reliability of the descent of multi-instrument probes.

This goal is achieved by the fact that the device is equipped with a swivel unit mounted above the block-balance roller and made in the form of an equilateral polygon, with guide rollers installed in the eyebins of which.

FIG. 1 - a general view of the device with a swivel unit and a fixed position; in fig. 2 is a side view of the device; FIG. 3 - section A-A of FIG. 2

The device for lifting and lifting operations in wells contains a frame 1 mounted at the wellhead, the roller-balancer roller 2, a above it, on the cantilever axis 3, is fixed and fixed with a double-acting ratchet stop, equilateral triangular rotary unit 4, with direction rollers 5 on the axis x 6 in its tops and hub 7 in the center.

Claims (2)

The double-sided ratchet stop consists of two ratchet gears 8 fixed rigidly to the hub 7 of the swivel block 4, two dogs 9, on axles 10 fixed on the frame 1. Dogs 9 are strengthened by means of a cam 11, handles 12 and a spring 13 Each ratchet wheel 8 has three teeth and p sweats with its dog 9 only when descending or ascending, that is, in one direction. Angle a and size E (see Fig. 1) are selected in such a way that the device 14, when the cable 5 is installed, is guided by the roller 5 to the wellhead 16. The device for lowering and lifting operations in the wells works as follows. The probe starts to enter cargo 17 and the device 14 suspension above the wellhead at the wellhead. After charging, the cable 15 unloads the cable 15 from the elevator winch and the load 17 and the device 14 rushes into the well to pull the remaining devices 18 of the multi-instrument probe. When approaching device 18 to the upper guide roller 5, with the aid of the handle 12 and the cam and the dog 9, the ratchet wheels 8 are disengaged from the ratchet wheel 8 and the rotary unit 4 by / a. M load 17 and the device 14 rotates one third turn the cantilever axis 3 and forcibly stopped by the pawl 9., which is pushed into the teeth of the ratchet wheel 8 by the action of the spring 13. The device 18 is transferred from the horizontal position to the vertical one and places the next guide roller 5 to the position of the upper roller. After charging the iipiioopa 18 clamping mechanism, the cable 15 is etched off until the next device of the multi-instrument probe is pepeved into the vertical position. When the last device is on the level ;; the wellhead 6 inserts it into the groove. The plug and the probe are located on the plug. The cable 15 from the roller 5 is transferred to the rocker block of the balancer 2 and the further descent of the probe is carried out in the usual manner known in the art. Lifting the probe devices is done in reverse order. At the beginning, only the balance-unit roller 2 is not used, and then, when the upper unit reaches the earth's surface, the rotary unit 4 is used. with the help of a winch lift. The last device, released from the plug, passes to the roller 5, through which the probe is pulled out of the borehole, the pens 12 and the ratchet wheels 8 are disconnected by the handle 12, which frees the rotary unit 4 and it, turning one third of a turn clockwise around axis 3, moves the device from vertical to horizontal position. The rotary unit 4, having made 1/3 of a turn, is forcibly stopped, as under the action of the spring 13, the pawl 9 sliding along the serrated surface of the ratchet wheels 8 sink into the corresponding teeth. Next, the probe is pulled out of the well through the guide roller 5. The last device, having passed the rotary unit 4, continues to move in the direction of the elevator, and at this time the next, penultimate device approaches roller 5 and the process repeats. In this way, all instruments of the multi-instrument probe are removed from the well. In order to reduce the weight of the device and facilitate its service conditions, it is possible to alternately install the block-balancer 2 roller or the rotary block 4 on the bed 1 in the course of the lowering and lifting operations. The invention is a device for tripping and drilling in wells, containing a block-balancer roller, a frame and a directional roller, characterized in that, in order to improve the reliability of the multi-instrument probes, it is equipped with a rotatable blockJ mounted above the roller-balancer and made in the form of an equal-sided polygon in the vertices of which guide rollers are installed. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 413259, cl. E 21 B 15/00, 1972. 2. USSR author's certificate L 234688, cl. G 01 V 1/00, 1967.