SU1709070A1 - Well completion and operation device - Google Patents

Abstract

The invention relates to the mining industry and is intended for the development, operation and maintenance of wells without pre-killing them;) Gelennym1 || fluids. The goal is to expand the functionality by reversing the work of the bypass valve-translator. The device consists of a hollow body (PC) 1c with a radial channel in which a check valve 2 and an additional radial channel 3 are installed. The invention relates to the mining industry, namely to packer devices for development and operation, as well as repairing wells without them pre-jamming with used liquids. The goal is to expand the functionality due to the reversing operation of the bypass valve sub. FIG. 1 shows a general view of the device in the initial position before installation in the wellbore; figure 2 - the same, in / female under the main. On the inner surface of PC 1, a ring groove (KP) 4 and an additional KP 5 are successively located below channel 3. PC 1 has a sealing element 6 fixed to PC 1. The bypass valve-sub (PP) 8 with a central 1 axial channel and successively located radial holes, PP 8 and. PC 1 are connected by a spline connection 11 and a spring element 12. In the initial position of the device, opening 9 is aligned with the radial channel of the valve 2. element 12 - with an additional gearbox 5, and channel 3 of the PC 1 is blocked by the software 8, At the bottom of PP 8 via the shear pin 13 is fixed with a spring ring 14 is an annular abutment 15, while the upper part in an axial channel threadably mounted washer 16 with axial holes. The device is lowered onto a casing column in a casing and is placed at a predetermined interval. When creating an overpressure, which through the port 9 of the PP 8 and the radial channel of the valve 2 of the PC 1 is transferred under the sealing element 6 and tightly presses it against the inner wall of the casing. 4 il. Packaged condition during well operation; fig.Z - the same, when disconnecting the reservoir; 4 is the same when the relief valve of the sub is extracted. The device for the development and operation of wells consists of a hollow body 1 with a radial channel in which a check valve 2 is installed and an additional radial channel 3 located below the main one. On the inner surface of the hollow body 1 under the additional sake-VJOYo41O

Description

An annular groove 4 and an additional annular groove 5 are sequentially arranged in the channel channel 3. A sealing element 6 is fixed to the outer surface of the hollow body 1 by means of end fittings 7. In the hollow body 1, a bypass valve sub 8 is installed with a central axial channel and successively spaced radial openings 9 and 10. The relief valve-sub 8 and the housing 1 are interconnected by a spline connection 11 and a spring element 12. In the initial position of the device, the radial hole 9 is joint with a radial bore of the non-return valve 2, the spring element 12 with a hub; 1 with a circular groove 5. And the additional radial bore 3 of the hollow body 1 is blocked by a relief valve-sub 8. On the lower part of the relief-sub 8, a ring is fixed with a shear pin 13 14 with a spring ring stop 15, and in the upper part in the axial channel a washer 16 with axial holes is installed on the threads.

The device works as follows.

The device is lowered on the string of pipes 17 8 casing 18 and placed in a predetermined interval of the well above the reservoir, the development of which must be held. An overpressure is created in the pipe string 17, which through the radial opening 9 of the relief valve sub 8 and the radial channel of the check valve 2 of the hollow body 1 is transferred under the sealing element 6 and firmly presses it to the casing 18. After installing the device in the casing 18, the pipe string 17 turn and lift to the surface. In the well down the well pump (not shown) and reduce the level of fluid in the casing 18 by a predetermined amount. Due to the created pressure differential, the relief valve-sub 8 moves up to the stop. The annular abutment 15 moves into the hollow-body 1. The spring element 12 enters the annular groove 4, and the radial hole 10 is aligned with the additional radial channel | 3. A further decrease in the level of fluid in the well causes the G1 of the fluid from the reservoir to operate the well.

If a borehole pump needs to be replaced, the reservoir is shut off without using well liquid. To do this, create in the casing 18 through the annular space.

the calculated overpressure, by which the bypass valve 8 moves downward and separates the additional radial channel 3 and the radial orifice 10, and the spring element 12 is re-inserted into the additional annular groove 5. Then the pressure in the well is released and the well pump is removed and its subsequent replacement.

To replace the worn out valve 8 in service operation of the well, or to carry out any treatment of the bottomhole formation zone, the tubing string 17 is again lowered and screwed with the biasing valve 8. Then, the tubing 17 and the subductor 8 are raised up. When this is cut shear pin 13 and the ring 14 falls to the bottom. The bypass valve-sub 8 is raised to the surface and the worn-out elements are replaced and the new ring 14 is installed with an annular stop 15.

If necessary, the device can be easily drilled, because its main parts are made of aluminum alloys or other similar materials.

For MV of the Invention A device for well development and operation, comprising a hollow body with a radial channel and an annular groove on the inner surface, a sealing element mounted on the outer surface of the body, telescopically mounted in the body cavity and a spill valve connected to it with a splined joint with radial holes and a plug with an emphasis in the lower part, a check valve installed in the radial channel of the housing, and a fixing unit of the bypass valve-steam of an elevator in the form of a spring element installed in the lower part of the relief valve-sub for fixing in the annular groove of the housing in the extreme upper position of the relief valve-sub, characterized in that, in order to extend the functionality by reversing the operation of the relief valve-g (transom, in the housing under sealing element. m made additional radial channel and additional annular groove on the inner surface, located under the main, and the additional radial channel of the housing in the original position overlapped sub-bypass valve, and a stub formed as a stop ring mounted on the plug shear pin, and an annular spring abutment mounted on the outer surface of the ring.

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Claims (1)

A device for the development and operation of wells, including a hollow body with a radial channel and an annular groove on the inner surface, a sealing element mounted on the outer surface of the body, telescopically mounted in the cavity of the body and connected with a spline connection bypass valve-sub with radial holes and a plug with with a stop in the lower part, a non-return valve installed in the radial channel of the housing, and a fixing unit for the bypass valve of the pilot in the form of a spring element, is installed about in the lower part of the bypass valve-sub for fixing in the annular groove of the body in the extreme upper position of the bypass valve-sub, characterized in that, in order to expand the functionality due to the reversible operation of the bypass valve-sub, an additional radial a channel and an additional annular groove on the inner surface, located under the main, and the additional radial channel of the housing in the initial position is closed bypass th valve-sub, and the stopper of the plug is made in the form of a ring, for 5 1709070 ο. mounted on the plug with a shear pin, and a spring ring stop mounted on the outer surface of the ring.