CN202706942U - Screwed joint for shale gas development - Google Patents
Screwed joint for shale gas development Download PDFInfo
- Publication number
- CN202706942U CN202706942U CN 201220299082 CN201220299082U CN202706942U CN 202706942 U CN202706942 U CN 202706942U CN 201220299082 CN201220299082 CN 201220299082 CN 201220299082 U CN201220299082 U CN 201220299082U CN 202706942 U CN202706942 U CN 202706942U
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- factory
- shoulder
- spot
- shale gas
- sealing cone
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Abstract
The utility model relates to a screwed joint for shale gas development. The screwed joint comprises a factory end, a field end and a coupling, a main shoulder of the factory end and a main shoulder of the field end form a toroidal surface matching, an auxiliary shoulder of the factory end and an auxiliary shoulder of the field end form a toroidal surface matching, and a sealing conical surface of the factory end and a sealing conical surface of the field end form a main sealing between a spherical surface and the conical surface. According to the screwed joint for the shale gas development, the technical problems that prior American Petroleum Institute (API) screwed joints can not meet the requirement of low pressure air sealing under the conditions of high torsion resistance, compression and bending, the processing cost is high, the scratching is prone to occur during fastening and unfastening, and the interchangeablity of the API screwed joints and API threads is poor are solved, the provided screwed joint for the shale gas development can meet the requirements of low pressure air sealing under the conditions of high torsion resistance, compression and bending, and an excellent interchangeablity between the screwed joint for the shale gas development and downhole tool joints is achieved.
Description
Technical field
The utility model coverage is the completion flow string, specifically, is that a kind of assurance shale gas exploitation is with satisfying high torque resistant, high compression, the nipple that is applicable to sleeve pipe of macrobending, low pressure gas sealing.
Background technology
China's shale gas reserves account for 1/3 of domestic natural gas.The exploitation shale gas with nipple in the down-hole, to bear large bending (20 °/30m) and high frac pressure and satisfy the high antitorque and high incompressible of horizontal well.
The API nipple that adopts at present can't satisfy the low pressure gas sealing under high antitorque and compression and the bending condition; Though the sealing of tradition Special threading connector is stablized, is had anti-stick button and crosses the characteristics of moment of torsion and compression performance excellence, but processing cost is high, box cupling cooperates formation independent sealed and shoulder with external screw thread, external screw thread factory end holds pipe end to the top with the scene, form sealing and shoulder, shoulder easily scratches in the upper shackle process, bending condition lower seal weak effect, poor with API screw thread interchangeability, being connected with existing downhole tool need crossover sub.
Summary of the invention
In order to solve existing API nipple, can't satisfy the requirement of the low pressure gas sealing under high antitorque and compression and the bending condition and processing cost is high, easily scratch in the upper shackle process, the technical problem poor with API screw thread interchangeability, the utility model provides a kind of shale gas exploitation nipple, can satisfy the requirement of the low pressure gas sealing under high antitorque and compression and the bending condition, and with the downhole tool joint good interchangeability be arranged.
Technical solution of the present utility model is:
A kind of shale gas exploitation nipple, comprise factory's end, on-the-spot end and box cupling, the inwall of described box cupling is provided with partially trapezoidal coupling inner thread, described factory end arranged outside has partially trapezoidal factory end external screw thread, described on-the-spot end arranged outside has partially trapezoidal on-the-spot end external screw thread, described factory end forms with box cupling by factory's end external screw thread and coupling inner thread and is threaded, described on-the-spot end forms with box cupling by scene end external screw thread and coupling inner thread and is threaded, it is characterized in that: described factory end forms factory's end slave station shoulder 13 successively with the end face ecto-entad that contacts of on-the-spot end, main shoulder 14 is held by factory's end sealing cone 12 and factory, and the middle part of described factory end sealing cone 12 is the sealing sphere;
Described on-the-spot end forms on-the-spot end slave station shoulder 23, on-the-spot end sealing cone 22 and the main shoulder 24 of on-the-spot end from outside to inside successively with the end face that contacts of factory's end;
Described factory holds main shoulder and the main shoulder of on-the-spot end to consist of anchor ring to cooperate, and described factory end slave station shoulder consists of anchor ring with on-the-spot end slave station shoulder and cooperates, and described factory end sealing cone holds sealing cone formation sphere to the primary seal of the conical surface with the scene.
It is 2～3mm that main height of shoulder H holds in above-mentioned factory, it is 2～3mm that secondary height of shoulder HF holds in described factory, the ball sealer radius surface R of described factory end sealing cone is 30～50mm, the angle Qg of described factory end sealing cone and horizontal direction is 20～30 °, the angle Q of described on-the-spot end sealing cone and horizontal direction is 15～25 °, described on-the-spot end slave station shoulder end face is 8～11mm with the distance L of the main shoulder end face of on-the-spot end, and it is 3～6mm to the sealing station of the conical surface and the main shoulder end face of on-the-spot end apart from B that described factory holds main shoulder and the main shoulder of on-the-spot end to form sphere.
All carry out the phosphatization processing on the contact surface of above-mentioned coupling inner thread and factory's end and on-the-spot end and form phosphatization coating, described phosphatization thickness of coating 20～30um.
Be coated with the API thread compound on above-mentioned on-the-spot end external screw thread and the factory's end external screw thread.
The beneficial effects of the utility model:
1, the utility model adopts factory's end external screw thread inwall to be processed to form shoulder and sealing surface cooperates with on-the-spot end external screw thread outer wall conical surface seal, and elimination box cupling shoulder relatively reduces coupling length and wall thickness with traditional special thread; Main shoulder has incompressible and crosses torque capability; The slave station shoulder has moment of torsion and the high compression ability of resisting; Factory's end sealing cone forms sphere to the primary seal of the conical surface with on-the-spot end sealing cone, can satisfy bending condition lower seal effect.
2, sealing guiding angle is controlled at 20～30 °, so that in the upper button process, on-the-spot end conical surface seal imports smoothly, satisfies the reliability of economy and shale gas exploitation needs.
2, the utility model screw thread adopts API buttress thread and downhole tool joint that good interchangeability is arranged.
Description of drawings
Below in conjunction with the drawings and specific embodiments present embodiment is described further.
Fig. 1 is spiral-lock figure on the utility model nipple;
Fig. 2 is the utility model factory end male connection structural representation;
Fig. 3 is the on-the-spot end of the utility model male connection structural representation;
Reference numeral: 1-factory end, 2-box cupling, the on-the-spot end of 3-, 11-factory end external screw thread, 12-factory end sealing cone, 13-factory end slave station shoulder, main shoulder is held by 14-factory, the on-the-spot end of 21-external screw thread, the on-the-spot end of 22-sealing cone, the on-the-spot end of 23-slave station shoulder, the main shoulder of the on-the-spot end of 24-.
The specific embodiment
A kind of shale gas exploitation nipple, comprise factory's end, on-the-spot end and box cupling, the inwall of box cupling is provided with partially trapezoidal coupling inner thread, factory's end arranged outside has partially trapezoidal factory end external screw thread, on-the-spot end arranged outside has partially trapezoidal on-the-spot end external screw thread, factory's end is threaded with box cupling by factory's end external screw thread and coupling inner thread, on-the-spot end is threaded with box cupling by scene end external screw thread and coupling inner thread, factory's end forms factory's end slave station shoulder 13 successively with the contact surface of on-the-spot end from box cupling to the nipple central axial direction, main shoulder 14 is held by factory's end sealing cone 12 and factory, has one section to be the sealing sphere in factory's end sealing cone;
On-the-spot end forms on-the-spot end slave station shoulder 23, on-the-spot end sealing cone 22 and the main shoulder 24 of on-the-spot end successively with the contact surface of factory's end from box cupling to the nipple central axial direction,
Factory holds main shoulder to cooperate with the main shoulder anchor ring of on-the-spot end, and factory's end slave station shoulder cooperates with on-the-spot end slave station shoulder anchor ring, and described factory end sealing cone forms sphere to the primary seal of the conical surface with on-the-spot end sealing cone.
Factory's end/main height of shoulder H of on-the-spot end is 2～3mm, factory's end/secondary height of shoulder HF of on-the-spot end is 2～3mm, ball sealer radius surface R is 30～50mm, the angle Qg of factory's end sealing cone and horizontal direction is 20～30 °, the angle Q of on-the-spot end sealing cone and horizontal direction is 15～25 °, on-the-spot end slave station shoulder end face is 8～11mm with the distance L of the main shoulder end face of on-the-spot end, and it is 3～6mm to the sealing station of the conical surface and the main shoulder end face of on-the-spot end apart from B that factory holds main shoulder and the main shoulder of on-the-spot end to form sphere.
Box cupling and body are with grade of steel or a high grade of steel, and the internal thread of box cupling and factory's end inwall adopt phosphatization to process thickness of coating 20 ~ 30um.The API thread compound is evenly smeared at two ends during upper button, and the upper button of clamping box cupling factory end is according to API buttress thread regulation, and opsition dependent is controlled upper button.Coupling length lacks 25.4mm than the API regulation and namely deducts the J value; Detain to the triangular marker base on the factory end, detain to more than the triangular marker base on the on-the-spot end, locate smoothly by the pipe end cone match and import factory's end inwall, on detain to shouldering torgue and occur.
Claims (4)
1. a shale gas exploitation is used nipple, comprise factory's end, on-the-spot end and box cupling, the inwall of described box cupling is provided with partially trapezoidal coupling inner thread, described factory end arranged outside has partially trapezoidal factory end external screw thread, described on-the-spot end arranged outside has partially trapezoidal on-the-spot end external screw thread, described factory end forms with box cupling by factory's end external screw thread and coupling inner thread and is threaded, described on-the-spot end forms with box cupling by scene end external screw thread and coupling inner thread and is threaded, it is characterized in that: described factory end forms factory's end slave station shoulder (13) successively with the end face ecto-entad that contacts of on-the-spot end, main shoulder (14) is held by factory's end sealing cone (12) and factory, and the middle part of described factory's end sealing cone (12) is the sealing sphere;
Described on-the-spot end forms on-the-spot end slave station shoulder (23), on-the-spot end sealing cone (22) and on-the-spot end main shoulder (24) from outside to inside successively with the end face that contacts of factory's end;
Described factory holds main shoulder and the main shoulder of on-the-spot end to consist of anchor ring to cooperate, and described factory end slave station shoulder consists of anchor ring with on-the-spot end slave station shoulder and cooperates, and described factory end sealing cone holds sealing cone formation sphere to the primary seal of the conical surface with the scene.
2. shale gas according to claim 1 exploitation is used nipple, it is characterized in that: it is 2～3mm that main height of shoulder (H) is held by described factory, it is 2～3mm that secondary height of shoulder (HF) is held by described factory, the ball sealer radius surface (R) of described factory end sealing cone is 30～50mm, the angle (Qg) of described factory end sealing cone and horizontal direction is 20～30 °, the angle (Q) of described on-the-spot end sealing cone and horizontal direction is 15～25 °, it is 8～11mm that described on-the-spot end slave station shoulder end face is held the distance (L) of main shoulder end face with the scene, and it is 3～6mm to the sealing station of the conical surface and the distance (B) of the main shoulder end face of on-the-spot end that main shoulder and the main shoulder formation of on-the-spot end sphere are held by described factory.
3. nipple is used in shale gas exploitation according to claim 1 and 2, it is characterized in that: all carry out phosphatization on the contact surface that described coupling inner thread and factory hold and hold at the scene and process formation phosphatization coating, described phosphatization thickness of coating 20～30um.
4. nipple is used in described shale gas exploitation according to claim 3, it is characterized in that: be coated with the API thread compound on described on-the-spot end external screw thread and the factory's end external screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220299082 CN202706942U (en) | 2012-06-25 | 2012-06-25 | Screwed joint for shale gas development |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220299082 CN202706942U (en) | 2012-06-25 | 2012-06-25 | Screwed joint for shale gas development |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202706942U true CN202706942U (en) | 2013-01-30 |
Family
ID=47587251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220299082 Withdrawn - After Issue CN202706942U (en) | 2012-06-25 | 2012-06-25 | Screwed joint for shale gas development |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202706942U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704864A (en) * | 2012-06-25 | 2012-10-03 | 西安三环科技开发总公司 | Threaded nipple for development of shale gases |
| CN105899753A (en) * | 2013-12-16 | 2016-08-24 | 伊藤忠丸红钢管美国公司 | Threaded connection |
-
2012
- 2012-06-25 CN CN 201220299082 patent/CN202706942U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102704864A (en) * | 2012-06-25 | 2012-10-03 | 西安三环科技开发总公司 | Threaded nipple for development of shale gases |
| CN102704864B (en) * | 2012-06-25 | 2015-10-28 | 西安三环科技开发总公司 | Shale gas exploitation nipple |
| CN105899753A (en) * | 2013-12-16 | 2016-08-24 | 伊藤忠丸红钢管美国公司 | Threaded connection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20151028 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |