CN215565828U - Corrosion-resistant oil recovery wellhead assembly's metal seal - Google Patents

Abstract

The utility model belongs to the technical field of oil development, and particularly relates to a corrosion-resistant metal seal of an oil extraction wellhead device. Through setting up sealing device, the design trachea among the sealing device, ventilate sealing device through connecting outside high-pressurepipe for whole sealing device forms a high-pressure strip tower constructional device, and the oil from oil pipe transport forms a balanced relation with the high pressure of outside transport, and fastener passes through the effect control hydraulic telescoping rod of hydraulic telescoping cylinder, reaches an easy fastener who controls easily, thereby has reached the not enough problem of revealing easily of leakproofness to well head device sealed effect solution.

Description

Corrosion-resistant oil recovery wellhead assembly's metal seal

Technical Field

The utility model belongs to the technical field of petroleum development, and particularly relates to a corrosion-resistant metal seal of an oil extraction wellhead device.

Background

The oil extraction engineering is a general term for various engineering technical measures taken on an oil reservoir through a production well and an injection well according to development targets in the oil field exploitation process, is used as a comprehensive application subject, and researches theories, engineering design methods and implementation technologies of the engineering technical measures which can economically and effectively act on the oil reservoir to improve the yield of the oil well and the recovery ratio of crude oil. In the field of oil extraction in oil fields, in order to prevent well fluid from leaking from a wellhead, a metal sealing device is required to be installed on the wellhead for oil extraction.

The wellhead assembly is in the use, and oil leaks easily, and current most wellhead assembly sealing performance is relatively poor, and serious influence the efficiency of oil development, caused unnecessary wasting of resources, it is more inconvenient to use, is unfavorable for the staff operation, delays the time that the staff repaired and detected, influences work efficiency.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides the metal seal of the corrosion-resistant oil extraction wellhead device, which has the advantages of better sealing property of the oil extraction wellhead, difficulty in leakage, convenience in fastening and convenience in replacing the sealing device, and solves the problems of insufficient sealing property, easiness in leakage, inconvenience in fastening and inconvenience in replacement in the prior art.

(II) technical scheme

In order to achieve the purpose, the utility model provides the following technical scheme: a corrosion-resistant metal seal of an oil extraction wellhead device comprises a fixed seat, wherein a fastening device is arranged on the upper surface of the fixed seat and fixedly connected with the outer surface of the sealing device, the sealing device comprises an end cover, the end cover is fixedly connected with a first box body through a first screw, a gasket is arranged on the lower surface of the end cover, the first box body is fixedly connected with a first spherical end socket through the first screw, the first box body is fixedly connected with a second box body through a second screw, the top of the second box body is fixedly connected with a pipeline joint, the top of the pipeline joint is communicated with an air pipe, the second box body is fixedly connected with a second spherical end socket through a third screw, an external threaded pipe penetrates through the inside of the sealing device, the external threaded pipe is fixedly connected with a limiting pipe, and an internal threaded pipe penetrates through the inside of the fixed seat, one side of the fixed seat is communicated with a first conduit, and the other side of the fixed seat is communicated with a second conduit.

Preferably, the outer surfaces of the first spherical end socket and the second spherical end socket are wrapped with sealing layers.

By adopting the scheme, the sealing layer is wrapped outside the spherical sealing head, so that a certain isolation effect is achieved on the spherical sealing head, and the sealing performance is improved.

Preferably, the first spherical end socket and the second spherical end socket are made of beryllium copper, and the sealing layer is made of rubber.

By adopting the scheme, the spherical end socket is made of beryllium copper, the beryllium copper has a certain plasticity effect, and the sealing layer is made of rubber, so that the plasticity, the corrosion resistance and the high temperature resistance are realized, and the sealing effect is improved.

Preferably, the diameter of the limiting pipe is larger than that of the opening of the second spherical end socket.

Through adopting above-mentioned scheme, the diameter of spacing pipe is greater than the spherical head of second, and spacing pipe is difficult for being extracted behind the spherical head of second, plays certain separation effect.

Preferably, the fastening device comprises an annular fastening clamp, the surface of the annular fastening clamp is fixedly connected with a connecting block, the connecting block is fixedly connected with the hydraulic telescopic cylinder through a fastening screw, the upper surface of the annular fastening clamp is fixedly connected with a nut, the upper surface of the annular fastening clamp is fixedly connected with a threaded sleeve, and the nut is in threaded connection with a bolt.

Through adopting above-mentioned scheme, be provided with fastener, fastener fixes sealing device and makes its stability and leakproofness reinforcing.

Preferably, the fastening device is movably connected with the sealing device.

By adopting the scheme, the fastening device is movably connected with the sealing device, so that the sealing device is convenient to detach and replace.

(III) advantageous effects

Compared with the prior art, the utility model provides a corrosion-resistant metal seal of an oil extraction wellhead device, which has the following beneficial effects:

1. this corrosion-resistant oil recovery wellhead assembly's metal seal, through setting up sealing device, design the trachea among the sealing device, ventilate sealing device through connecting outside high-pressurepipe, make whole sealing device form a high-pressure strip tower constructional device, form a balanced relation from oil pipe transport's oil and outside high pressure of carrying, itself sealing head is beryllium copper material and peripheral parcel one deck sealing layer, thereby reach sealed effect to wellhead assembly and solved the not enough problem of revealing easily of leakproofness.

2. The outer surface of the sealing device is provided with the fastening device, the fastening device controls the hydraulic telescopic rod through the action of the hydraulic telescopic cylinder to achieve the fastening device easy to control, the tightness of the bolt is manually adjusted after the hydraulic telescopic cylinder is closed, and the process of fastening again is achieved, so that the fastening process between the sealing device and the fixing seat is achieved.

3. When the external thread pipe and the internal thread pipe run through the sealing device, the head part of the thread pipe is connected with a limiting pipe structure, the limiting pipe structure can form the effect of a blocking block, the blocking thread pipe is loosened when being lifted and pulled, and the blocking thread pipe is tightly attached to the spherical end socket to form a certain sealing effect.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic cross-sectional view of a sealing device according to the present invention;

FIG. 3 is a schematic top view of the fastening device of the present invention;

in the figure: 1. a fixed seat; 2. a fastening device; 201. an annular fastening clip; 202. connecting blocks; 203. fastening screws; 204. a hydraulic telescopic cylinder; 205. a nut; 206. a threaded sleeve; 207. a bolt; 3. a sealing device; 301. an end cap; 302. a gasket; 303. a first screw; 304. a first case; 305. a first spherical end enclosure; 306. a second screw; 307. a pipe joint; 308. an air tube; 309. a second case; 310. a third screw; 311. a second spherical end enclosure; 313. a sealing layer; 4. an externally threaded tube; 5. an internally threaded tube; 6. a first conduit; 7. a second conduit; 8. and a limiting pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

A corrosion-resistant metal seal of an oil extraction wellhead device comprises a fixed seat 1, wherein a fastening device 2 is arranged on the upper surface of the fixed seat 1, the fastening device 2 is fixedly connected with the outer surface of a sealing device 3, the sealing device 3 comprises an end cover 301, the end cover 301 is fixedly connected with a first box body 304 through a first screw 303, a gasket 302 is arranged on the lower surface of the end cover 301, the first box body 304 is fixedly connected with a first spherical end socket 305 through the first screw 303, the first box body 304 is fixedly connected with a second box body 309 through a second screw 306, the top of the second box body 309 is fixedly connected with a pipe joint 307, the top of the pipe joint 307 is communicated with an air pipe 308, the second box body 309 is fixedly connected with a second spherical end socket 311 through a third screw 310, an external threaded pipe 4 penetrates through the inside of the sealing device 3, the external threaded pipe 4 is fixedly connected with a limiting pipe 8, an internal threaded pipe 5 penetrates through the inside of the fixed seat 1, a first conduit 6 is communicated with one side of the fixed seat 1, and a second conduit 7 is communicated with the other side of the fixed seat 1.

The outer surfaces of the first spherical end socket 305 and the second spherical end socket 311 are wrapped with sealing layers 313, the first spherical end socket 305 and the second spherical end socket 311 are made of beryllium copper, the sealing layers 313 are made of rubber, and the diameter of the limiting pipe 8 is larger than that of an opening of the second spherical end socket 311.

Referring to fig. 1-3, first, an external threaded pipe 4 is connected, the external threaded pipe 4 penetrates through the whole sealing device 3, the top of the external threaded pipe 4 is connected with a limiting pipe 8, the limiting pipe 8 can form a stopper structure to be clamped on a second spherical end socket 311, so that an external device can drive the sealing device 3 to move to a wellhead for installation, external high pressure is communicated through an air pipe 308 after installation is finished, a high-pressure environment is formed for the sealing device 3, the second spherical end socket 311 is beryllium copper, a sealing layer 313 is wrapped on the periphery of the second spherical end socket, the sealing effect is better, the number of the spherical end sockets is two, a double-insurance effect is achieved, and the problem that the sealing performance is insufficient and leakage is easy is solved.

Example two

The design of the fastening device is increased on the basis of the first embodiment.

The fastening device 2 comprises an annular fastening clamp 201, a connecting block 202 is fixedly connected to the surface of the annular fastening clamp 201, the connecting block 202 is fixedly connected with a hydraulic telescopic cylinder 204 through a fastening screw 203, a nut 205 is fixedly connected to the upper surface of the annular fastening clamp 201, a threaded sleeve 206 is fixedly connected to the upper surface of the annular fastening clamp 201, the nut 205 is in threaded connection with a bolt 207, and the fastening device 2 is movably connected with the sealing device 3.

Referring to fig. 1-3, outside fastener 2 has been increased on sealing device 3's basis, fastener 2 fastens annular fastening clamp 201 through the effect of hydraulic telescoping cylinder 204, and the bolt fastening is once more operated after the fastening for interact fastens between sealing device 3 and the fixing base 1, is difficult not hard up, makes sealing device 3 have better stability, and sealed effect is better, and fastener 2 and sealing device 3 swing joint, convenient to detach and change.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a corrosion-resistant oil recovery wellhead assembly's metal seal, includes fixing base (1), its characterized in that: the upper surface of the fixed seat (1) is provided with a fastening device (2), the fastening device (2) is fixedly connected with the outer surface of the sealing device (3), the sealing device (3) comprises an end cover (301), the end cover (301) is fixedly connected with a first box body (304) through a first screw (303), the lower surface of the end cover (301) is provided with a gasket (302), the first box body (304) is fixedly connected with a first spherical end socket (305) through a first screw (303), the first box body (304) is fixedly connected with a second box body (309) through a second screw (306), the top of the second box body (309) is fixedly connected with a pipeline joint (307), the top of the pipeline joint (307) is communicated with an air pipe (308), and the second box body (309) is fixedly connected with a second spherical end socket (311) through a third screw (310), the utility model discloses a sealing device, including sealing device (3), the inside of sealing device (3) is run through and is had external screw thread pipe (4), external screw thread pipe (4) the spacing pipe of fixedly connected with (8), the inside of fixing base (1) is run through and is had internal thread pipe (5), one side intercommunication of fixing base (1) has first pipe (6), the opposite side intercommunication of fixing base (1) has second pipe (7).

2. A corrosion resistant metal seal for a production wellhead as claimed in claim 1 wherein: the outer surfaces of the first spherical seal head (305) and the second spherical seal head (311) are wrapped with sealing layers (313).

3. A corrosion resistant metal seal for a production wellhead as claimed in claim 2 in which: the first spherical sealing head (305) and the second spherical sealing head (311) are made of beryllium copper, and the sealing layer (313) is made of rubber.

4. A corrosion resistant metal seal for a production wellhead as claimed in claim 1 wherein: the diameter of the limiting pipe (8) is larger than that of the opening of the second spherical seal head (311).

5. A corrosion resistant metal seal for a production wellhead as claimed in claim 1 wherein: fastening device (2) include annular fastening clamp (201), the fixed surface of annular fastening clamp (201) is connected with connecting block (202), connecting block (202) are through fastening screw (203) and hydraulic telescoping cylinder (204) fixed connection, the fixed surface of annular fastening clamp (201) is connected with nut (205), the fixed surface of the upper surface of annular fastening clamp (201) is connected with swivel nut (206), nut (205) and bolt (207) threaded connection.

6. A corrosion resistant metal seal for a production wellhead according to claim 5 wherein: the fastening device (2) is movably connected with the sealing device (3).

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