CN203835322U - Wellhead and casing connecting device - Google Patents

Wellhead and casing connecting device Download PDF

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Publication number
CN203835322U
CN203835322U CN201420236399.9U CN201420236399U CN203835322U CN 203835322 U CN203835322 U CN 203835322U CN 201420236399 U CN201420236399 U CN 201420236399U CN 203835322 U CN203835322 U CN 203835322U
Authority
CN
China
Prior art keywords
casing
setting
pipe
wellhead
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420236399.9U
Other languages
Chinese (zh)
Inventor
张传忠
秦永志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANDONG YONGZHI PETROLEUM EQUIPMENT Co Ltd
Original Assignee
SHANDONG YONGZHI PETROLEUM EQUIPMENT Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANDONG YONGZHI PETROLEUM EQUIPMENT Co Ltd filed Critical SHANDONG YONGZHI PETROLEUM EQUIPMENT Co Ltd
Priority to CN201420236399.9U priority Critical patent/CN203835322U/en
Application granted granted Critical
Publication of CN203835322U publication Critical patent/CN203835322U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a wellhead and casing connecting device. According to the technical scheme, the joint of a casing is connected with a wellhead through a packer block, a locking ring is fixed to the outer portion of the packer block through a bolt, a check ring is arranged on the top of the packer block, a wear-resisting sleeve is annularly arranged in the packer block, a sealing element is mounted between the locking ring and the packer block, the outer portion of the locking ring is provided with a threaded groove, the check ring is provided with a threaded protrusion matched with the threaded groove in the locking ring, the lower portion of the packer block is provided with a surface casing, the surface casing is connected with the locking ring through threads of the surface casing, and the packer block is provided with a lateral inlet. The wellhead and casing connecting device has the advantages that connecting operation in site construction is simple, safety is effectively improved, potential safety hazards are reduced, the situation that the surface casing and an oil-string casing are subjected to well completion at the wellhead by welding an annular steel plate is avoided, connection stability is ensured, and well drilling safety is enhanced.

Description

Wellhead casing pipe linkage
Technical field
The utility model relates to a kind of cover pipe connection, particularly a kind of wellhead casing pipe linkage.
Background technology
The box cupling of petroleum casing pipe is a kind of in petroleum pipeline fixture, is widely used in field of petroleum exploitation; The existing box cupling for petroleum casing pipe comprises wellhead flange, reinforces pipe nipple, slips, inner sleeve, bleeder pipe, upper flange and lower flange, inner sleeve connects wellhead flange, between wellhead flange and upper flange, by reinforcing pipe nipple, be fixedly connected with, upper flange and lower flange link together, between lower flange and inner sleeve, by slips, fix, inner sleeve between upper flange and wellhead flange is provided with bleeder pipe, the outside fixed jacket pipe of inner sleeve, and upper flange and lower flange junction are provided with sealing ring; This box cupling for petroleum casing pipe is used to be found, due to the winter cold, causes whole box cupling to use.In oil drilling oil recovery process, wellhead casing pipe linkage is a kind of parts of splicing sleeve and various wellhead assemblies, and in order to bear the various stressed of protective casing and production string, the annular space between Sealing Technology sleeve pipe and production string, installs preventer.
Chinese patent literature number: CN 202731821 U, patent name is < < thermal production well wellhead casing pipe linkage > >, comprise fixed cover, sleeve pipe suspension joint, black box, casing joint, plug, housing, black box is arranged in housing, black box lower seat is on enclosure interior shoulder, sleeve pipe suspension joint seat is on black box, connecting thread is arranged at sleeve pipe suspension joint top, sleeve pipe suspension joint bottom is connected with casing joint top, production string screw thread is arranged at casing joint bottom, lower housing portion has protective casing screw, on housing, there is side direction import, plug is arranged in side direction import, the bottom of fixed cover is fixed in housing top, black box is pushed down in the lower surface of fixed cover, there is steel ring slot the upper surface of housing, this protective casing and production string are to carry out completion by welding doughnut-shaped steel plate at well head place, the length of wanting protective casing to expand with heat and contract with cold with production string during due to thermal recovery steam injection is different, therefore, when above-mentioned completion mode is not suitable for heavy oil wells heat extraction by steam injection, also need to cut open at the scene doughnut-shaped steel plate, bring very large potential safety hazard, when drilling well two is simultaneously opened, preventer can not be effectively installed, two occur that emergency episode is difficult for processing while opening, and have increased the danger of drilling well.
Summary of the invention
The purpose of this utility model is exactly in view of the foregoing defects the prior art has, and a kind of wellhead casing pipe linkage is provided, simple to operate, has effectively improved safety, has reduced potential safety hazard.
Its technical scheme is: comprise sleeve pipe, locating snap ring, retaining ring, setting, side direction import, surface pipe, surface pipe screw thread, wearing bush, seal, the junction of sleeve pipe is by setting connection, the described outside of setting is bolted retaining ring, the described top of setting is provided with locating snap ring, the inside annular space of setting is provided with wearing bush, between described retaining ring and setting, seal is installed, the outside of described retaining ring is provided with thread groove, locating snap ring is provided with the protruding gear of the screw thread matching with thread groove in retaining ring, surface pipe is arranged at the bottom of setting, surface pipe is threaded by surface pipe with retaining ring, on setting, there is side direction import.
The interior lower end face of above-mentioned locating snap ring is provided with outer W shape threaded block, and the upper surface of setting is provided with the interior W shape threaded block matching with outer W shape threaded block on locating snap ring.
The beneficial effects of the utility model are: by latch segment, fix setting validity that has guaranteed that sleeve pipe is setting, it is loosening that the locating snap ring on latch segment prevents that latch segment rotation from causing, and connects simply, guarantees the stability connecting; Site operation attended operation is simple, has effectively improved safety, has reduced potential safety hazard, and having avoided surface pipe and production string is to carry out completion by welding doughnut-shaped steel plate at well head place, guarantees the stability of connection, has increased the safety of drilling well.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model;
Accompanying drawing 2 is local structure for amplifying schematic diagrames of A portion in Fig. 1;
In upper figure: sleeve pipe 1, locating snap ring 2, retaining ring 3, setting 4, side direction import 5, surface pipe 6, surface pipe screw thread 7, wearing bush 8, seal 9, outer W shape threaded block 2.1, the protruding gear 2.2 of screw thread, thread groove 3.1, interior W shape threaded block 4.1.
The specific embodiment
1-2 by reference to the accompanying drawings, the utility model will be further described:
The utility model comprises sleeve pipe 1, locating snap ring 2, retaining ring 3, setting 4, side direction import 5, surface pipe 6, surface pipe screw thread 7, wearing bush 8, seal 9, the junction of sleeve pipe 1 connects by setting 4, the described outside of setting 4 is bolted retaining ring 3, the described top of setting 4 is provided with locating snap ring 2, the inside annular space of setting 4 is provided with wearing bush 8, between described retaining ring 3 and setting 4, seal 9 is installed, the outside of described retaining ring 3 is provided with thread groove 3.1, locating snap ring 2 is provided with the protruding gear 2.2 of the screw thread matching with thread groove 3.1 in retaining ring 3, surface pipe 6 is arranged at the bottom of setting 4, surface pipe 6 is connected by surface pipe screw thread 7 with retaining ring 3, on setting 4, there is side direction import 5, by latch segment, fix setting validity that has guaranteed that sleeve pipe is setting, locating snap ring on latch segment prevents that latch segment rotation from causing loosening, connect simple, guarantee the stability connecting.
The interior lower end face of locating snap ring 2 is wherein provided with outer W shape threaded block 2.1, the upper surface of setting 4 is provided with the interior W shape threaded block 4.1 matching with outer W shape threaded block 2.1 on locating snap ring 2, the interior W shape threaded block 4.1 of the upper surface of setting 4 matches with the outer W shape threaded block 2.1 on locating snap ring 2, better guarantee the compactness coordinating, improved the safety of job execution.
The beneficial effects of the utility model are: by latch segment, fix setting validity that has guaranteed that sleeve pipe is setting, it is loosening that the locating snap ring on latch segment prevents that latch segment rotation from causing, and connects simply, guarantees the stability connecting; Site operation attended operation is simple, has effectively improved safety, has reduced potential safety hazard, and having avoided surface pipe and production string is to carry out completion by welding doughnut-shaped steel plate at well head place, guarantees the stability of connection, has increased the safety of drilling well.

Claims (2)

1. a wellhead casing pipe linkage, it is characterized in that: comprise sleeve pipe (1), locating snap ring (2), retaining ring (3), setting (4), side direction import (5), surface pipe (6), surface pipe screw thread (7), wearing bush (8), seal (9), the junction of sleeve pipe (1) connects by setting (4), the outside of described setting (4) is bolted retaining ring (3), the top of described setting (4) is provided with locating snap ring (2), the inside annular space of setting (4) is provided with wearing bush (8), between described retaining ring (3) and setting (4), seal (9) is installed, the outside of described retaining ring (3) is provided with thread groove (3.1), locating snap ring (2) is provided with the protruding gear of screw thread (2.2) matching with the upper thread groove (3.1) of retaining ring (3), surface pipe (6) is arranged at the bottom of setting (4), surface pipe (6) is connected by surface pipe screw thread (7) with retaining ring (3), on setting (4), there is side direction import (5).
2. wellhead casing pipe linkage according to claim 1, it is characterized in that: the interior lower end face of described locating snap ring (2) is provided with outer W shape threaded block (2.1), the upper surface of setting (4) is provided with the interior W shape threaded block (4.1) matching with outer W shape threaded block (2.1) on locating snap ring (2).
CN201420236399.9U 2014-05-09 2014-05-09 Wellhead and casing connecting device Expired - Fee Related CN203835322U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420236399.9U CN203835322U (en) 2014-05-09 2014-05-09 Wellhead and casing connecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420236399.9U CN203835322U (en) 2014-05-09 2014-05-09 Wellhead and casing connecting device

Publications (1)

Publication Number Publication Date
CN203835322U true CN203835322U (en) 2014-09-17

Family

ID=51513179

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201420236399.9U Expired - Fee Related CN203835322U (en) 2014-05-09 2014-05-09 Wellhead and casing connecting device

Country Status (1)

Country Link
CN (1) CN203835322U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109098681A (en) * 2018-09-11 2018-12-28 扬州市驰城石油机械有限公司 A kind of well head sealing device between conduit and casing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109098681A (en) * 2018-09-11 2018-12-28 扬州市驰城石油机械有限公司 A kind of well head sealing device between conduit and casing

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140917

Termination date: 20170509