SU1368424A1 - Arrangement for removing inventory elements from well - Google Patents

Abstract

The invention relates to the mining industry and improves the efficiency of the device. It comprises a housing 1 with an axial channel 2, a low pressure chamber (k) 3 with a rupture diaphragm 4. Beneath it is a receiving K 6 with a hammer 7 in the upper part and a gripper 8 in the lower part. In K 3 and 6, side flushing channels (BK) 19 and 20 are made and valves are placed in the form of glasses (C)

Description

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9, 10 and 15, respectively, with BC 11, 12 and 16, having a locking element 14 in the upper part. Each of them is made in the form of a ring on the shear elements 13 and 17 located in the upper part 9 and BC 16. Moreover, the locking element is 14 m .b, made in the form of a stepped ring with a BC. A large stage is installed under the BC on C with a ball valve inside and forms a cavity with walls K 6. During operation of the device, pipes with K 3 are drastically lowered and diaphragm 4 is broken. Then K 3 is filled with flushing fluid (RV) and the lower part of C 15 is shifted into ring 17. Eventually, the slurry is drawn into BK 6 and C 9 is shifted 10 J by closing channels 12. Then the mud moves to C 15, lowering it, and further in the annulus through channels 21 above K6. T. arr., washing is carried out continuously. When using a valve design in the form of a ring with stages of the pancreas enters the housing 1, the ball valves isolate its flow from the annulus to K 3. When the circulating fluid returns, the axial channel 4 closes and the channels open to output the pancreas to the annulus. 1 hp f-ly, 2 ill.

The invention relates to devices used in the mining industry, primarily for cleaning the borehole and the bottom hole from foreign matter and ensuring the normal process of drilling or operating the well.

The purpose of the invention is to increase the efficiency of the device.

FIG. 1 shows the device in the initial position, a longitudinal section; FIG. 2 - a variant of the design of the valve receiving chamber.

The device includes a housing 1 with an axial channel 2 and a low pressure chamber 3 installed in the chamber 3 of a destructible diaphragm 4 and telescopically mounted in the housing 1 under the diaphragm 4 with axial movement 4 with the possibility of axial movement of the housing 5 with the receiving chamber 6, a hammer 7 in the upper part and a node 8 grip at the bottom. In the low pressure chamber 3 there is a valve in the form of a differential piston, consisting of two parts 9 and 10, with side channels 11 and 12 and fixed in the upper part 10 of the differential piston, for example, on the shear element 13, a locking element made in the form of a sleeve 14 In the receiving chamber 6 of the housing 5 there is a valve in the form of a cup 15 with side channels 16 fixed in its upper part, for example, on the shear element 17 by the sleeve 18. In the initial position of the valve, the low pressure chamber 3 and the receiving chamber 6 block the axial channels 2 and 19, and the sleeve 14. is located

under the side channels 20, made in the housing 1, and the sleeve 18 is installed in the chamber 6 with the possibility of overlapping the side channels 21 made in the housing 5 of the receiving chamber

6. The housing 5 is installed in the housing 1 by means of the slots 22 on the shear element 23.

The valve installed in the receiving chamber 6 may be made in the form

a cup 24 with an axial channel 25 and a stepped ring 26 installed in its upper part with side channels 27 and forming a cavity 28 with the body 5 in which ball valves 29 are installed under side channels 21, and a ball valve is installed in the axial channel 25 of cup 24 30. The device operates as follows.

A device is lowered into the well on the pipe string and installed on the face, on which foreign objects are located. In this case, the washing is carried out through the side channels 20.

The device is then actuated, for which by partial unloading the tubing string the body 5 is pressed against the face, the tubing string with the body 1 is turned relative to the body 5. In this case

pins 23 are cut away and

Pitch spline connection 22, which removes the pipe string from the stop. The tubes with chamber 3 are drastically lowered down by their own weight. When the housing 1 moves downwards, the diaphragm 4 hits the drummer 7 and breaks. The depressurization of the low pressure chamber 3 occurs and its filling at high speed with the flushing fluid from the well. The liquid enters it through the receiving chamber 6 with the node 8 capture.

Under the action of the pressure differential, the pins 17 are cut off, and the cup 15 is moved upwards, thereby opening the passage of fluid from the receiving chamber 6 through the channels 31, 16 and 32 into the internal cavity of the cup 15 and the low pressure chamber 3. Sludge, pieces of rock, foreign metallic and non-metallic objects together with the fluid flow are drawn into the receiving chamber 6 of the device above the gripping element 8. At this time flushing 25 C 26 and ball valves 29 and 30

performed through the side channels

20 above the chamber 3, feeding the liquid annulus around the chambers from which the liquid enters the device. After filling the chamber 3 with liquid and equalizing the pressure in it with respect to the pressure in the pipe string over the lower part 9 of the differential piston, the latter rises up to the exit of the side channels 11 into the inner spaces of the overflow chamber 33. At the same time, the lower part 9 of the piston shifts the upper part 10 from the last sleeve 14 upwards, which block the channel 20. The flushing fluid begins to move from the pipes through the bypass chamber 33, channels 12 and 11 and the cavity of chamber 3 to the valve

in the form of glass 15.

Under the pressure of the washing liquid, the cup 15 goes down and closes the axial canal 31 by opening the channels 21. Thus, the access of the washing liquid to the receiving chamber 6 and protecting the gripping unit 8 from shock loads caused by the pulsation of the device after operation of the device is blocked. Wash fluid begins to flow into the annulus through the side channels

21 above the receiving chamber 6. The flushing is almost constant at all times.

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approach of the device to foreign objects, when it is triggered and when rising to the surface. In this case, the receiving chamber completely overlaps from the entry of the washing liquid into it.

If for any reason there is an obstacle to the flow of fluid into the well through the channels 21, then at a certain overpressure in the bypass chamber 33, the pins 13 are cut and the sleeve 14 moves downwards. The channels 20 are opened and the flush fluid enters the annulus.

After completion of the work to remove sludge from the bottom of the well, the device is raised to the surface and the receiving chamber 6 is cleaned from the collected sludge.

When performing the design of the valve installed in the receiving chamber 6, in the form of glass 24, stepped col 0

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(Fig. 2) the device operates as follows.

After the diaphragm 4 is destroyed, the fluid from the well through the receiving chamber 6 and the axial channel 25 of the cup 24 enters the cavity of the housing 1. At the same time, the ball valves 29, blocking the side channels 27 of the ring 26, isolate the flow of fluid from the annulus into the low pressure chamber 3. During the reverse circulation of fluid, the ball valve 30 closes the axial channel 25 of the cup 24, and the ball valves 29, lifted by the fluid flow, open the side channels 27 of the ring 26, and the fluid passing through the channels 21 of the housing 5 enters the annulus.

The use of the proposed device allows the well to be constantly flushed during its descent, actuation and recovery, which prevents the device from sticking in the well, and also increases the durability of the capture unit by eliminating the fluid pulsation in the receiving chamber after the device has triggered.

Claims (2)

1. An apparatus for removing foreign objects from a well, comprising a housing with an axial channel, a camel a low pressure plow with a destructible diaphragm installed in it, tele- scopically installed in the housing under the destructible diaphragm with the possibility of axial movement of the receiving chamber with a drummer in the upper part and the gripping unit in the lower part, o, t that, in order to improve the efficiency of the device, the low pressure chamber body and the receiving chamber are equipped with valves in the initial position of the axial channel and made in the receiving chamber in the form of a glass with side channels, and in the low pressure chamber, in the form of a differential piston with side channels and shut-off elements located between the housing and the valves, made in the form of bushings and fixed relative to the latter, for example, shear elements The side washing channels are made in the low pressure chamber and in the receiving chamber, the sleeve in the receiving chamber is installed with the possibility of shutting off the latter in the initial position, and the sleeve in the low pressure chamber is installed under the side washing channels of the housing. 2. The device is pop.1, which differs from the fact that the locking element is made in the form of a stepped ring with side channels installed by its larger step on the glass with the formation of a cavity with the walls of the receiving chamber and placed in it under the side channels of the receiving chamber With the possibility of blocking the side channels of the ring with ball valves, a ball valve is installed in the glass, which in its initial position divides the chamber with the cavity. guv