CN213928299U

CN213928299U - Well head sealing device for workover operation

Info

Publication number: CN213928299U
Application number: CN202022329400.0U
Authority: CN
Inventors: 哈尔恒·吐尔松; 尹晓敏; 史永祥; 马磊
Original assignee: Xinjiang Kelin Side New Energy Co ltd
Current assignee: Xinjiang Kelin Side New Energy Co ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2021-08-10
Anticipated expiration: 2030-10-19

Abstract

The utility model belongs to coal bed gas exploitation field, concretely relates to workover well head sealing device, including the well body, the upper end fixed mounting of the well body has the well head cover, the upper end scarf joint of well head cover has the sealing washer, the upper end contact of sealing washer is connected with sealed lid, there is sealed lid the upper end of well head cover through threaded connection, the inside welding of sealed lid has the sleeve, sliding connection has the cable in the sleeve, there is the adapter sleeve telescopic upper end through threaded connection, install the seal cover in the adapter sleeve, the cable has been alternate in the seal cover. This scheme seals up the gas well as the main part through design well head cover and sealed lid, and covers the structure such as design sleeve, adapter sleeve, seal cover at sealed, seals cable department, and the cable conveniently relieves the locking and receive and release, still designs the pressure release structure on the blast pipe of sealed lid, can carry out timely pressure release, avoids taking place the risk of bursting.

Description

Well head sealing device for workover operation

Technical Field

The utility model belongs to coal bed gas exploitation field, concretely relates to workover well head sealing device.

Background

At present, because the work load is limited in the well repairing operation process, the well repairing operation is carried out in a daytime construction mode and a night stop mode in the operation process, and when the gas well with large gas quantity or the gas well operation in the later drainage and production period is met, the gas well can still carry out gas self-injection even if the drainage and production equipment stops pumping and discharging.

However, after the pipe column part is lifted out of the shaft, because the cable of the underground pressure gauge is long, the cable is not easy to normally penetrate through a cable outlet in production to seal a wellhead, gas produced during shutdown freely escapes, so that resource waste is caused, and meanwhile, certain hidden danger is brought to safe production in a production field.

Disclosure of Invention

An object of the utility model is to provide a workover well head sealing device, the sealed problem of well head when having solved workover, still design pressure release structure, carry out pressure protection, through the cable with the pressure gauge pass sealed lid, conveniently receive and release the regulation.

In order to achieve the purpose, the utility model provides a workover wellhead sealing device, which comprises a wellhead body, wherein the upper end of the wellhead body is fixedly provided with a wellhead sleeve, the upper end of the wellhead sleeve is embedded with a sealing ring, the upper end of the sealing ring is in contact connection with a sealing cover, the upper end of the wellhead sleeve is in threaded connection with the sealing cover, the sealing cover is internally welded with a sleeve, a cable is slidably connected in the sleeve, the upper end of the sleeve is in threaded connection with a fastening sleeve, the fastening sleeve is internally provided with a sealing sleeve, the cable is inserted in the sealing sleeve, the lower end of the sealing sleeve is sleeved with the upper end of the sleeve, the sealing cover is internally welded with an exhaust pipe, the exhaust pipe is provided with a valve, the left end of the exhaust pipe is welded with a pressure relief pipe, the pressure relief pipe is internally provided with a vent groove and a pressure relief port, and the left end of the pressure relief pipe is in threaded connection with an end cover, the middle part of end cover has seted up the through-hole, sliding connection has the guide arm in the through-hole, the spring has been cup jointed in the outside of guide arm, the right-hand member welding of guide arm has the piston, piston and pressure release pipe sliding connection, the right-hand member bonding of piston has sealed the pad, sealed pad and pressure release pipe sliding connection.

The principle of the utility model lies in: when a gas well needs to be sealed, a wellhead sleeve is firstly pressed at the upper end of a well body in advance, then a sealing cover and the wellhead sleeve are connected and sealed through threads, then a sealing sleeve and a fastening sleeve are sleeved outside a cable of a pressure gauge, the cable penetrates through a sleeve on the sealing cover, then a handle is rotated, the fastening sleeve and the sleeve are locked through threads, the fastening sleeve extrudes the sealing sleeve, a gap between the cable and the sleeve can be sealed, the sealing effect is good, when the cable needs to be wound and unwound, the handle only needs to be reversed, and the fastening sleeve is unlocked; when the pressure in the well is too high, the air pressure can push the sealing gasket and the piston in the pressure relief pipe, the sealing gasket and the piston move leftwards, the spring is compressed, when the piston and the sealing gasket pass through the pressure relief opening, the air can be discharged through the pressure relief opening, and the explosion risk caused by pressure overload is avoided.

The beneficial effects of the utility model reside in that: this scheme seals up the gas well as the main part through design well head cover and sealed lid, and covers the structure such as design sleeve, adapter sleeve, seal cover at sealed, seals cable department, and the cable conveniently relieves the locking and receive and release, still designs the pressure release structure on the blast pipe of sealed lid, can carry out timely pressure release, avoids taking place the risk of bursting.

Further, the outside of well head cover is provided with the arch, bellied quantity is a plurality of, and a plurality of archs are the symmetric distribution in the outside of well head cover. Through the design of the bulge, the wellhead sleeve is firmer at the wellhead.

Furthermore, a wire groove is formed in the upper end of the fastening sleeve, and a cable is inserted into the wire groove. Through the design of wire casing, provide the interlude space for the cable.

Further, the outside welding of adapter sleeve has the handle, the quantity of handle is two, two the handle is the symmetric distribution in the both sides of adapter sleeve. Through the design of handle, conveniently rotate the adapter sleeve, operate the adapter sleeve.

Furthermore, the left end of the spring is in contact with the end cover, and the right end of the spring is in contact connection with the piston. By the design of the spring, a spring force can be provided, the maximum spring force value of which should be equivalent to the pressure limit in the well.

Drawings

FIG. 1 is a schematic view of a wellhead sealing device for workover operations according to an embodiment of the present invention;

FIG. 2 is an enlarged view of the portion A of the wellhead sealing device in the workover operation of the embodiment of the invention;

FIG. 3 is an enlarged view of the portion B of FIG. 1 of the wellhead sealing device for workover operations according to the embodiment of the present invention;

FIG. 4 is a top view of the adapter sleeve of FIG. 2 of an embodiment of the present invention in a workover wellhead sealing device;

fig. 5 is a block diagram of the sleeve of fig. 2 of a workover wellhead sealing device in accordance with an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the well body 1, a well head sleeve 2, a protrusion 3, a sealing ring 4, a sealing cover 5, a sleeve 6, a cable 7, a fastening sleeve 8, a wire casing 9, a sealing sleeve 10, a handle 11, an exhaust pipe 12, a valve 13, a pressure relief pipe 14, a vent groove 14, a pressure relief opening 16, an end cover 17, a through hole 18, a guide rod 19, a spring 20, a piston 21 and a sealing gasket 22.

As shown in fig. 1, the embodiment provides a workover wellhead sealing device, including the well body 1, the upper end fixed mounting well head cover 2 of the well body 1, the outside of well head cover 2 sets up protruding 3, protruding 3's quantity is a plurality of, a plurality of protruding 3 are the symmetric distribution in the outside of well head cover 2, design through protruding 3 can make well head cover 2 more firm in well head department, well head cover 2's upper end scarf joint sealing washer 4, the sealed lid 5 of upper end contact connection of sealing washer 4, sealing washer 4 is made by rubber materials, the leakproofness is good.

As shown in fig. 1, 2, 4 and 5, the upper end of the wellhead housing 2 is connected with a sealing cover 5 through a screw thread, a sleeve 6 is welded inside the sealing cover 5, a cable 7 is connected inside the sleeve 6 in a sliding way, the upper end of the sleeve 6 is connected with a fastening sleeve 8 through a screw thread, a wire slot 9 is arranged at the upper end of the fastening sleeve 8, the cable 7 is inserted into the wire slot 9, through the design of the wire groove 9, a penetrating space is provided for the cable 7, a sealing sleeve 10 is arranged in the fastening sleeve 8, the cable 7 is penetrated in the sealing sleeve 10, the lower end of the sealing sleeve 10 is sleeved with the upper end of the sleeve 6, the upper end of the sleeve 6 is of a conical surface structure, under the extrusion of adapter sleeve 8, can make seal cover 10 compress tightly cable 7, the outside welding handle 11 of adapter sleeve 8, the quantity of handle 11 is two, and two handles 11 are the symmetric distribution in the both sides of adapter sleeve 8, through the design of handle 11, conveniently rotate adapter sleeve 8, operate adapter sleeve 8.

As shown in fig. 1 and 3, an exhaust pipe 12 is welded inside a sealing cover 5, a valve 13 is installed on the exhaust pipe 12, a pressure relief pipe 14 is welded at the left end of the exhaust pipe 12, a vent groove 15 and a pressure relief opening 16 are formed inside the pressure relief pipe 14, the left end of the pressure relief pipe 14 is connected with an end cover 17 through threads, a through hole 18 is formed in the middle of the end cover 17, a guide rod 19 is connected in the through hole 18 in a sliding mode, a spring 20 is sleeved outside the guide rod 19, the left end of the spring 20 is in contact with the end cover 17, the right end of the spring 20 is in contact with a piston 21, through the design of the spring 20, elastic force can be provided, the maximum elastic force value of the elastic force is equivalent to the limit value of the pressure in the well, the piston 21 is welded at the right end of the guide rod 19, the piston 21 is in sliding connection with the pressure relief pipe 14, a sealing gasket 22 is bonded at the right end of the piston 21, the sealing gasket is in sliding connection with the pressure relief pipe 14, and mechanical sealing is formed between the piston 21 and the pressure relief pipe 14.

The utility model discloses the concrete implementation process as follows: when a gas well needs to be sealed, the wellhead sleeve 2 is firstly pressed at the upper end of a well body 1 in advance, then the sealing cover 5 and the wellhead sleeve 2 are connected and sealed through threads, then the outer side of a cable 7 of the pressure gauge is sleeved with the sealing sleeve 10 and the fastening sleeve 8, then the cable 7 penetrates through the sleeve 6 on the sealing cover 5, then the handle 11 is rotated, the fastening sleeve 8 and the sleeve 6 are locked through threads, the fastening sleeve 8 extrudes the sealing sleeve 10, the gap between the cable 7 and the sleeve 6 can be sealed, the sealing effect is good, when the cable 7 needs to be wound and unwound, only the handle 11 needs to be reversed, and the fastening sleeve 8 is unlocked; when the pressure in the well is too high, the air pressure can push the sealing gasket 22 and the piston 21 in the pressure relief pipe 14, the sealing gasket 22 and the piston 21 move leftwards, the spring 20 is compressed, and when the piston 21 and the sealing gasket 22 pass through the pressure relief opening 16, air can be exhausted through the pressure relief opening 16, so that the explosion risk caused by pressure overload is avoided.

This scheme seals up the gas well as the main part through design well head cover 2 and sealed lid 5, and designs sleeve 6, adapter sleeve 8, seal cover 10 isotructure on sealed lid 5, seals 7 departments of cable, and cable 7 conveniently relieves the locking and receive and release, still designs the pressure release structure on sealed lid 5's blast pipe 12, can in time release pressure, avoids taking place the risk of bursting.

It should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used broadly in the present invention, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides a workover wellhead sealing device, includes the well body, its characterized in that: the upper end of the well body is fixedly provided with a well head sleeve, the upper end of the well head sleeve is embedded with a sealing ring, the upper end of the sealing ring is in contact connection with a sealing cover, the upper end of the well head sleeve is in threaded connection with the sealing cover, the sealing cover is welded inside the sealing cover, a cable is slidably connected in the sleeve, the upper end of the sleeve is in threaded connection with a fastening sleeve, a sealing sleeve is installed in the fastening sleeve, the cable is inserted in the sealing sleeve, the lower end of the sealing sleeve is sleeved with the upper end of the sleeve, an exhaust pipe is welded inside the sealing cover, a valve is installed on the exhaust pipe, a pressure relief pipe is welded at the left end of the exhaust pipe, a vent groove and a pressure relief port are formed in the pressure relief pipe, the left end of the pressure relief pipe is connected with an end cover through threads, the middle part of the end cover is provided with a through hole, and a guide rod is slidably connected in the through hole, the spring is sleeved on the outer side of the guide rod, a piston is welded at the right end of the guide rod and is in sliding connection with the pressure relief pipe, a sealing gasket is bonded at the right end of the piston and is in sliding connection with the pressure relief pipe.

2. The workover wellhead sealing device of claim 1, wherein: the outside of well head cover is provided with the arch, bellied quantity is a plurality of, and a plurality of archs are the symmetric distribution in the outside of well head cover.

3. The workover wellhead sealing device of claim 1, wherein: the upper end of the fastening sleeve is provided with a wire groove, and a cable is inserted in the wire groove.

4. The workover wellhead sealing device of claim 1, wherein: the outside welding of adapter sleeve has the handle, the quantity of handle is two, two the handle is the symmetric distribution in the both sides of adapter sleeve.

5. The workover wellhead sealing device of claim 1, wherein: the left end of the spring is in contact with the end cover, and the right end of the spring is in contact connection with the piston.