CN201474626U - Reverse buckle double joint - Google Patents
Reverse buckle double joint Download PDFInfo
- Publication number
- CN201474626U CN201474626U CN200920225902XU CN200920225902U CN201474626U CN 201474626 U CN201474626 U CN 201474626U CN 200920225902X U CN200920225902X U CN 200920225902XU CN 200920225902 U CN200920225902 U CN 200920225902U CN 201474626 U CN201474626 U CN 201474626U
- Authority
- CN
- China
- Prior art keywords
- joint
- reverse buckle
- face
- hand thread
- external screw
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000012856 packing Methods 0.000 claims description 12
- 230000007704 transition Effects 0.000 claims description 9
- 210000001503 joint Anatomy 0.000 abstract 4
- 238000011065 in-situ storage Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model relates to a reverse buckle double joint for fitting the pipe string of oil-water well in oil field, which comprises an upper joint (1), two sealing rings (2, 3), a middle joint (4) and a lower joint (5); wherein the lower end of the excircle of the upper joint (1) is provided with a cylinder surface provided with a sealing ring groove, the upper end of the cylinder surface is provided with a reverse buckle external screw, the upper end of the reverse buckle external screw is provided with a sealing ring groove, the excircle is provided with a flat square group (6), the reverse buckle external screw at lower part is connected with the middle joint (4), the upper and the lower parts of the inner hole of the middle joint (4) are provided with reverse buckle internal screws, while the middle part has cylinder surface, two ends of the inner hole are provided with a step respectively, the reverse buckle internal screw at the lower end of the middle joint (4) is connected with the lower joint (5), the upper end of the excircle of the lower joint (5) is provided with a cylinder surface provided with a sealing ring groove, the lower end of the cylinder surface is provided with a reverse buckle external screw which lower end is provided with a sealing ring groove, and the middle part of the excircle is provided with a flat square group (7). The reverse buckle double joint has the advantages of simple structure and easy in-situ application.
Description
One, technical field:
The utility model relates to a kind of left-hand thread twin adapter, be a kind of when being used for oilfield downhole operation tubing string meet the instrument of card back-off.
Two, background technology:
At present, the safety joint that field use tubing string when underground work is met the card back-off divides two kinds basically: a kind of is peg type, the upper lifting pipe post is cut off the disengagement of pin tubing string when tubing string is met card, tubing string more than the stuck point is proposed, so that handle the tubing string that card is met in the bottom, this structure has that tubing string is met card or oil pipe in going into the well, instrument is suppressed when testing with Louing, easily causes pin to be cut off and causes construction to fail.Another kind is to adopt the left-hand thread structure, and is most with one-level left-hand thread structures, the drawback of this structure be because get rusty, fouling, the rate of outwarding winding when causing meeting card is not high, influences construction speed; The patent No. is 200420039036.2 structures that two left-hand threads are provided, though simple in structure, connect during site operation, dismounting is inconvenient, uses operating characteristics poor.
Three, summary of the invention:
The purpose of this utility model is: provide a kind of simple in structure, site operation connects, the left-hand thread twin adapter of convenient disassembly.
The utility model is achieved in that the utility model is by top connection, sealing ring, transition joint, lower contact is formed, there is a face of cylinder cylindrical lower end of top connection, its face of cylinder is provided with the ring packing ring recess, upper end, face of cylinder adjacent has the external screw thread of a left-hand thread, also there is the ring packing ring recess the externally threaded upper end of left-hand thread, one group of flat side is arranged on the cylindrical, transition joint is the identical structures in top and the bottom, on the endoporus, the internal thread of left-hand thread is all arranged at the bottom, the centre has one section column sealed, its two interior bore ends respectively has a step, there is a face of cylinder cylindrical upper end of lower contact, its face of cylinder is provided with the ring packing ring recess, lower end, face of cylinder adjacent has the external screw thread of a left-hand thread, the externally threaded lower end of left-hand thread also is provided with the ring packing ring recess, one group of flat side is arranged, in the transition joint on the cylindrical, the left-hand thread internal thread of lower end connects the external screw thread of top connection lower end and lower contact upper end respectively.
The utility model beneficial effect is: site operation is convenient, improves operating efficiency.
Four, description of drawings:
Accompanying drawing 1 is a structural representation of the present utility model.
Among the figure: 1-top connection, 2, the 3-sealing ring, 4-transition joint, 5-lower contact, 6, the flat side of 7-
Five, embodiment:
Below in conjunction with accompanying drawing embodiment of the present utility model is further elaborated:
The utility model is by top connection (1), sealing ring (2), (3), transition joint (4), lower contact (5) is formed, there is a face of cylinder cylindrical lower end of top connection (1), its face of cylinder is provided with the ring packing ring recess, sealing ring (3) is installed, the upper end adjacent on the face of cylinder has the external screw thread of left-hand thread, also there is the ring packing ring recess the externally threaded upper end of left-hand thread, sealing ring (2) is installed, one group of flat side (6) is arranged on its cylindrical, transition joint (4) is the identical structures in top and the bottom, on the endoporus, the bottom is, the internal thread that left-hand thread is arranged, the centre has one section column sealed, respectively there is a stepped hole at its endoporus both ends, there is a face of cylinder cylindrical upper end of lower contact (5), the face of cylinder is provided with the ring packing ring recess, sealing ring (3) is installed, lower end, face of cylinder adjacent has the external screw thread of left-hand thread, the externally threaded bottom of left-hand thread also is provided with the ring packing ring recess, sealing ring (2) is installed, one group of flat side (7) is arranged, in the transition joint (4) on the cylindrical, the left-hand thread internal thread of lower end connects the external screw thread of top connection (1) lower end and lower contact (5) upper end respectively.
Claims (1)
1. left-hand thread twin adapter, by top connection (1), sealing ring (2), (3), transition joint (4), lower contact (5) is formed, it is characterized in that: there is a face of cylinder cylindrical lower end of top connection (1), its face of cylinder is provided with the ring packing ring recess, upper end, face of cylinder adjacent has the external screw thread of a left-hand thread, the externally threaded upper end of left-hand thread also is provided with the ring packing ring recess, one group of flat side (6) is arranged on the cylindrical, transition joint (4) is an identical structure up and down, on its endoporus, the bottom is equipped with the internal thread of left-hand thread, the centre has one section column sealed, respectively there is a stepped hole at its endoporus both ends, there is a face of cylinder cylindrical upper end of lower contact (5), the face of cylinder is provided with the ring packing ring recess, and lower end, face of cylinder adjacent has the external screw thread of a left-hand thread, and the externally threaded bottom of left-hand thread also is provided with the ring packing ring recess, one group of flat side (7) is arranged, in the transition joint (4) on its cylindrical, the left-hand thread internal thread of lower end connects the external screw thread of top connection (1) lower end and lower contact (5) upper end respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920225902XU CN201474626U (en) | 2009-09-02 | 2009-09-02 | Reverse buckle double joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920225902XU CN201474626U (en) | 2009-09-02 | 2009-09-02 | Reverse buckle double joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201474626U true CN201474626U (en) | 2010-05-19 |
Family
ID=42410874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920225902XU Expired - Fee Related CN201474626U (en) | 2009-09-02 | 2009-09-02 | Reverse buckle double joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201474626U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644444A (en) * | 2012-04-24 | 2012-08-22 | 山东东宝钢管有限公司 | Double-seal anti-corrosion water injection well oil pipe |
| CN103982147A (en) * | 2014-06-05 | 2014-08-13 | 山西华鑫电气有限公司 | Automatic mounting and demounting connector for auger stem of underground drill rig |
-
2009
- 2009-09-02 CN CN200920225902XU patent/CN201474626U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102644444A (en) * | 2012-04-24 | 2012-08-22 | 山东东宝钢管有限公司 | Double-seal anti-corrosion water injection well oil pipe |
| CN103982147A (en) * | 2014-06-05 | 2014-08-13 | 山西华鑫电气有限公司 | Automatic mounting and demounting connector for auger stem of underground drill rig |
| CN103982147B (en) * | 2014-06-05 | 2016-01-20 | 山西华鑫电气有限公司 | A kind of underground drill rig auger stem Auto-mounting and dismounting joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20120902 |