CN212508129U - Air-tight screw-connected pipe joint - Google Patents
Air-tight screw-connected pipe joint Download PDFInfo
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- CN212508129U CN212508129U CN202021607014.7U CN202021607014U CN212508129U CN 212508129 U CN212508129 U CN 212508129U CN 202021607014 U CN202021607014 U CN 202021607014U CN 212508129 U CN212508129 U CN 212508129U
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- casing head
- threaded connection
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Abstract
The utility model belongs to the technical field of the petroleum machinery, especially, relate to a pipe joint of airtight threaded connection, its characterized in that includes the bottom sprag, passes through bolted connection's end flange with the casing head body, bottom and top casing nipple joint through airtight female connection, top extension neck with the casing head body top layer casing coupling connector that is connected, the setting is in metal seal and the flange seal backing ring between top layer casing coupling connector and casing head body. The utility model has novel structure, simple operation, stable performance and safe and reliable use; the installation direction can be adjusted, field management is convenient, the surface casing connector is reliable in sealing, the surface casing connector can be lowered to a preset position through a drilling blowout preventer, and the gas well connector is suitable for long-term exploitation of a gas-tight threaded connection natural gas well at the bottom of a casing head.
Description
Technical Field
The utility model belongs to the technical field of the oil machinery, especially, relate to a pipe joint of airtight threaded connection.
Background
The conventional connection modes of the surface casing and the casing head in the petroleum drilling process are a threaded type, a welded type and an inverted slip type, and can meet the requirements of the general oil and gas exploitation well drilling and completion process, but under the condition of a high-pressure gas well, the connection modes with the surface casing are not desirable, and are mainly reflected as follows:
1. the bottom of the casing head adopts a threaded type: the sealing thread connection is adopted, such as TPCQ, BG-T1/T2 and the like, the thread must strictly reach the specified tightening torque to realize metal sealing, the sealing is reliable, but the direction of the casing head is not adjustable; and the sleeve head is connected by adopting non-airtight threads, so that the direction of the sleeve head is adjustable, but the sealing is unreliable.
2. The bottom of the casing head adopts the disadvantages of inverted slip connection: the connection technology of the inverted slip and the surface casing is mature, but the sealing between the inverted slip and the casing head usually adopts non-metal sealing such as BT, P, FS and the like, and due to erosion of corrosive gas, aging of rubber products and other reasons, the long-time sealing effect is difficult to guarantee, leakage is difficult to compensate, and the potential safety hazard is large.
3. The welding mode adopted at the bottom of the casing head is not applicable to high-pressure acid-containing gas wells.
4. The method of one more casing head can be adopted, and the drilling operation cost of each well is increased by about million yuan.
Disclosure of Invention
The utility model aims at providing a pipe joint which can carry out air-tight threaded connection on a sleeve head surface layer sleeve and a sleeve head shell under the condition of not increasing a primary sleeve head, so that the direction of the sleeve head is adjustable and the sealing is reliable; the sealing device has the advantages of compact structure, simplicity and convenience in installation, excellent sealing, durability in use, safety, reliability and the like.
The purpose of the utility model is realized by the following technical scheme:
the utility model discloses an airtight threaded connection's coupling, its characterized in that includes the bottom sprag, passes through bolted connection's end flange with the casing head body, bottom and top casing nipple joint pass through airtight internal thread connection, top extension neck with the casing head body the top casing coupling connector that is connected, set up and be in metal seal and the flange seal backing ring between top casing coupling connector and casing head body.
The bottom of the surface casing coupling connector is provided with an air-tight internal thread, and the surface casing coupling connector is in threaded connection with the bottom flange.
The utility model has the advantages that:
(1) the air-tight threaded pipe joint has the advantages of novel structure, simple operation, stable performance and safe and reliable use;
(2) the air-tight threaded connection pipe joint has strong field applicability, greatly reduces the production operation cost and reduces the safety risk;
(3) the air-tight threaded connection pipe joint of the utility model can realize adjustable installation direction, is convenient for field management, and can test the metal sealing effect through field test after the installation is finished;
(4) the pipe joint in the air-tight threaded connection has reliable sealing of the surface casing connector and can be put into a preset position through a drilling blowout preventer;
(5) the utility model discloses an airtight threaded connection's coupling is applicable to the gas well long-term exploitation of the airtight threaded connection in casing head bottom.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
As shown in fig. 1, the utility model discloses an airtight threaded connection's coupling, its characterized in that includes bottom sprag 2, passes through bolted connection's end flange 4 with casing head body 7, bottom and top casing nipple 1 through airtight female connection, top extension neck with the casing head body 7 the top casing coupling connector 3 that is connected, the setting is in metal seal 6 and flange seal backing ring 5 between top casing coupling connector 3 and casing head body 7.
The bottom of the surface casing coupling connector 3 is provided with an air-tight internal thread, and the surface casing coupling connector 3 is in threaded connection with the bottom flange 4.
The utility model discloses an airtight threaded connection's coupling mainly designs a surface casing coupling connector 3, adopts threaded connection with bottom flange 4, and surface casing coupling connector 3 bottom is airtight internal thread and is connected with surface casing nipple 1, and the top extension neck is designed for metal seal 6 with casing head body 7 bottom, and metal seal 6 is used for realizing the permanent seal between surface casing coupling connector 3 and casing head body 7, and the modern design is safe and reliable; the bottom flange 4 is connected with the casing head body 7 through bolts, and the bolts are tightened through standard torque, so that the metal seal 6 between the casing head body 7 and the surface casing coupling connector 3 can be excited; the lower part of the surface casing coupler 3 is connected with the airtight thread of the surface casing string on a drill floor, the airtight torque requirement is met through the measurement of a torque measuring instrument, and the sealing is reliable; the bottom flange 4 and the surface casing coupling connector 3 can be realized by a square drill rod through a torque flange, and the square drill rod is rotated to align the direction of the casing head after the hand is tightly spaced. The base support 2 is used to support the casing head body 7. The bottom flange 4 is a standard API6A flange and is internally threaded within the bottom flange 4 for connection to the surface casing coupler 3 and the casing head body 7. The flange gasket ring 5 is an API standard flange gasket ring. The casing head body is connected in a flange mode from top to bottom, and the bottom and the surface casing form metal sealing.
The air-tight threaded pipe joint has the advantages of novel structure, simple operation, stable performance and safe and reliable use; the field applicability is strong, the production operation cost is greatly reduced, and the safety risk is reduced; the installation direction can be adjusted, the field management is convenient, and the effect of the metal seal 6 can be tested through field test after the installation is finished; the surface sleeve connector 3 of the air-tight threaded connection pipe joint of the utility model is reliable in sealing and can be put into a preset position through a drilling blowout preventer; the gas well gas-tight screw-thread connection sleeve head is suitable for long-term exploitation of a gas well with the bottom of the sleeve head hermetically sealed and connected by the screw threads.
Claims (2)
1. The air-tight seal threaded connection pipe joint is characterized by comprising a bottom support, a bottom flange, a surface casing coupling connector, a metal seal and flange seal backing ring, wherein the bottom flange is connected with a casing head body through a bolt, the bottom of the surface casing coupling connector is connected with a surface casing short section through an air-tight seal internal thread, and a top extension neck is connected with the casing head body.
2. The hermetically sealed threaded connection of claim 1, wherein said skin sleeve coupler is threaded to said bottom flange with internal threads for hermetic sealing at the bottom of said skin sleeve coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021607014.7U CN212508129U (en) | 2020-08-05 | 2020-08-05 | Air-tight screw-connected pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021607014.7U CN212508129U (en) | 2020-08-05 | 2020-08-05 | Air-tight screw-connected pipe joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212508129U true CN212508129U (en) | 2021-02-09 |
Family
ID=74442912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021607014.7U Active CN212508129U (en) | 2020-08-05 | 2020-08-05 | Air-tight screw-connected pipe joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212508129U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963076A (en) * | 2020-08-05 | 2020-11-20 | 中国石油天然气集团有限公司 | Air-tight screw-connected pipe joint |
| RU211191U1 (en) * | 2021-12-15 | 2022-05-25 | Управляющая компания общество с ограниченной ответственностью "ТМС групп" | Stringing device with coupling high-tight suspension |
-
2020
- 2020-08-05 CN CN202021607014.7U patent/CN212508129U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963076A (en) * | 2020-08-05 | 2020-11-20 | 中国石油天然气集团有限公司 | Air-tight screw-connected pipe joint |
| RU211191U1 (en) * | 2021-12-15 | 2022-05-25 | Управляющая компания общество с ограниченной ответственностью "ТМС групп" | Stringing device with coupling high-tight suspension |
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