SU1657601A1 - Means for retaining downhole device in pipe string - Google Patents

Abstract

The invention relates to the oil industry and can be used for fixing in the pipe string and extracting from it downhole devices (CS) - valves, downhole fittings, injectors, etc. The aim of the invention is to increase the reliability of operation by preventing the shear latch from premature failure. The equipment for fixing the SU in the pipe string includes a fitting nipple 1 connected to the pipe string with an annular bore 2 on the inner surface, a tool for launching “W JS C ate VJ o

Description

3, the supporting element (OE) 5. The tool for lowering 3 contains a shear element 4 installed with the possibility of destruction after fixation of the SU. The equipment also contains a cylindrical head (CG) 7 connected by a shear lock 6 with the OE. Shear clamp 6 is installed with the possibility of destruction when lifting SU. An annular groove 8 and a collar 9 are made on the outer surface of the CG. In the annular groove of the CG in the transport position there is a concentric positioning means, which is installed with the possibility of contact when removing the tool for

descent with collet 9, end face of OE and annular bore 2 nipple 1. In addition, the equipment is equipped with a sleeve 11, concentrically installed in the CG. Longitudinal grooves 12 are made under the gripping means in the CH, for inserting the fingers 13 into them. Some of the ends of the fingers are rigidly connected to the ES, others are connected to the sleeve 11. Moreover, the CH is axially displaced relative to the ES after the lock 6 is destroyed. lifting tool, sss blow up. The fingers 13 support the OE and prevent the premature cut of Fixer 6. 1 Il.

The invention relates to the oil and gas industry and can be used for fixing downhole devices — valves, bottomhole fittings, injectors, etc. — in a pipe string and for extracting from it.

The aim of the invention is to increase the reliability of operation by preventing the messenger latch from premature failure.

The drawing shows the equipment section.

The equipment for fixing the downhole device in the pipe string contains a landing nipple 1 with an annular bore 2 on the inner surface, a tool 3 for lowering with a shear element 4 installed with the possibility of destruction after fixing the downhole device associated with the pipe pipe, a supporting element and associated with it by means of a shear retainer 6 installed with the possibility of destruction when lifting a downhole device, a cylindrical head 7 with an annular groove 8 and a collar 9 on the outer surface concentrates but located in the transport position in the annular groove 8 of the head 7, the gripping means 10. installed with contact when removing the tool for descending with the collar 9, the end face of the support element 5 and the annular bore 2 nipple 1. The equipment is equipped with a sleeve 11 concentrically mounted in the cylindrical The head 7, in the latter of which, under the gripping means 10, are made longitudinal grooves 12 for inserting fingers 13 therein, some ends of which are rigidly connected with p supporting element 5, and others with sleeve 11, and ska head 7 mounted pozmozhnostyu axial movement relative to the support member 5 after shear degradation retainer 6.

The equipment works as follows.

In the transport position, the tool for lowering is fixed by a shear element 4 in the sleeve 11. The gripping means - the spring ring 10 is in the groove 8. When the seating nipple 1 is reached, the ring 10 is compressed in the groove 8 and enters the nipple and then opens in the bore 2 nipple start lifting the tool. The ring 10 interacts with the bore 2 and is fixed in this position by the collar 9. To release the tool, ss blows up, the fingers 13 support the support element 5 and prevent the shear section of the clamp 6. At the same time, the shear element 4 is unhindered and the tool is released to release the device . The device is lifted by another tool that interacts with the head 7. In this case, ss blows to move the head 7 upwards, the latch 6 is cut off, the system - the supporting element 5, the fingers 13, the sleeves 11 - moves downwards, the ring 10, leaves the collar 9 is compressed and releases the downhole device from being fixed in the nipple 1.

Claims (1)

Invention Formula Equipment for fisheries downhole device in a string of pipes, including a landing nipple with an annular bore on the inner surface associated with a pipe string, a tool for lowering with a shear element installed with the possibility of destruction after fixing the downhole device, and a supporting element associated with it with shear dnii r stopped with the possibility destruction when lifting a borehole set-up destruction of a shear fixture, a cylindrical head with a ring-torus, it is equipped with a sleeve, concentric howling groove and collar on the outer mounted in the cylindrical head, surfaces concentrically located — the last of which, under the means seized in the transport position in the annular 5, are made longitudinal grooves for fixing the head, means of gripping, placing fingers in them, one ends of which Contact-rigidly bonded to the support member, and nor when retrieving a tool for lowering another - with a sleeve, and a cylindrical with a collar, an end face of the support element and a col-head are installed with the possibility of an axial-end bore nipple, so that it is displaced relative to the support so that, in order to increase the reliability of the element after the shearing fixity of the work is destroyed by preventing the precursor.