CN2545353Y - Sand control joint - Google Patents
Sand control joint Download PDFInfo
- Publication number
- CN2545353Y CN2545353Y CN 02211753 CN02211753U CN2545353Y CN 2545353 Y CN2545353 Y CN 2545353Y CN 02211753 CN02211753 CN 02211753 CN 02211753 U CN02211753 U CN 02211753U CN 2545353 Y CN2545353 Y CN 2545353Y
- Authority
- CN
- China
- Prior art keywords
- piston
- lower contact
- joint
- water plugging
- lower joint
- 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
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Abstract
A sand control releasing joint relates to a tool used in the underground well of the oil field. A lower joint (1) is connected with the lower end of a piston sleeve (2), a piston (6) arranged in a circular space (12) formed by the lower joint and the piston sleeve is connected with the lower joint by a peg (3). An upper joint (11) arranged in the lower joint has one lower end connected with the lower joint by a gate piece (4), which is positioned above the peg. The top end of the piston sleeve and the step face (1-1) of the lower joint are equipped with rib sleeves (13), the upper end of which and the outside cylindrical surface of the lower joint are equipped with a pressing cap (10), a rubber sealing sleeve (9) is arranged on the rib sleeve and the outside cylindrical surface of the cap. The utility model solves the problem that a water plugging string is easily plugged by a fractured well and an easily sanding well, causing the difficulty in starting the water plugging string next time. Even a sand falls into the oil pipe of the water plugging string, a pen with a small diameter can move the sand out, the inner hole of the fishing releasing joint appears and the water plugging string is fished out, thereby guaranteeing the oil increasing effect and the technological success ratio after the water plugging.
Description
Technical field: the utility model relates to the instrument that down-hole, a kind of oil field is used.
Background technology: the back-off sub of using on the oil field at present, in the use of post-fracturing oil well and easy sand well, occur easily water plugging string sand is buried phenomenon, cause play the problem of water plugging string difficulty next time, but also influence the success rate of oil production and construction.
Summary of the invention: the utility model is a kind of Sand control joint of development, make its can be after pressure break oil well and easy sand output well use in water plugging string do not buried by sand, and make water plugging string be easy to salvage.The utility model comprises lower contact 1, top connection 11, piston bush 2, pin 3, lock dog 4, piston 6, and it also comprises seal rubber sleeve 9, pressure cap 10, fin cover 13.Lower contact 1 is connected with the lower end of piston bush 2, and piston 6 is arranged in the annular space 12 that is formed by piston bush 2 and lower contact 1, and piston 6 is connected by pin 3 with lower contact 1; Top connection 11 is arranged in the lower contact 1, the lower end of top connection 11 is connected by lock dog 4 with lower contact 1, lock dog 4 is positioned at the top of pin 3, on the step surface 1-1 of the upper end of piston bush 2 and lower contact 1, be provided with fin cover 13, on the external cylindrical surface of the upper end of fin cover 13 and lower contact 1, be provided with pressure cap 10, on the external cylindrical surface of fin cover 13 and pressure cap 10, be provided with seal rubber sleeve 9.The utility model is simple in structure, be easy to install, low cost of manufacture, solved in the past fractured well and easily sand output well water plugging string sand is buried to cause easily and plays the phenomenon of water plugging string difficulty next time.Use the utility model, even sand falls in the water plugging string oil pipe, also can it be gone out by the minor diameter nib, expose and salvage the back-off sub endoporus, water plugging string is salvaged out, it can guarantee the oil increasing effect behind the water blockoff, and can guarantee the technology success rate.
Description of drawings: Fig. 1 is a structural representation of the present utility model.
The specific embodiment: present embodiment is made up of lower contact 1, top connection 11, piston bush 2, pin 3, lock dog 4, piston 6, seal rubber sleeve 9, pressure cap 10, fin cover 13, sealing ring 5, sealing ring 7, sealing ring 8, sealing ring 15; Lower contact 1 is connected with the lower end of piston bush 2, and piston 6 is arranged in the annular space 12 that is formed by piston bush 2 and lower contact 1, and piston 6 is connected by pin 3 with lower contact 1; Top connection 11 is arranged in the lower contact 1, the lower end of top connection 11 is connected by lock dog 4 with lower contact 1, lock dog 4 is positioned at the top of pin 3, on the step surface 1-1 of the upper end of piston bush 2 and lower contact 1, be provided with fin cover 13, on the external cylindrical surface of the upper end of fin cover 13 and lower contact 1, be provided with pressure cap 10, on the external cylindrical surface of fin cover 13 and pressure cap 10, be provided with seal rubber sleeve 9.Between piston bush 2 and lower contact 1, be provided with sealing ring 15, between piston bush 2 and piston 6, be provided with sealing ring 5, between piston 6 and lower contact 1, be provided with sealing ring 7, between lower contact 1 and top connection 11, be provided with sealing ring 8.
Operating principle: the instruments such as tubing string, Sand control joint, compression packer and water blockoff device of will delivering connect the G.I.H desired depth successively.With the pump truck pressurization packer is discharged from well head, this moment, the pin 3 in the Sand control joint was cut off under hydraulic action, piston 6 moves up, and makes lock dog 4 lose outer the support, forfeiture locking effect, carry the delivery tubing string on this moment, top connection 11 will break away from lock dog 4, is tripped out ground.
Claims (2)
1, Sand control joint, it comprises lower contact (1), top connection (11), piston bush (2), pin (3), lock dog (4), piston (6), it is characterized in that it also comprises seal rubber sleeve (9), pressure cap (10), fin cover (13), lower contact (1) is connected with the lower end of piston bush (2), piston (6) is arranged in the annular space (12) that is formed by piston bush (2) and lower contact (1), and piston (6) is connected by pin (3) with lower contact (1); Top connection (11) is arranged in the lower contact (1), the lower end of top connection (11) is connected by lock dog (4) with lower contact (1), lock dog (4) is positioned at the top of pin (3), on the step surface (1-1) of the upper end of piston bush (2) and lower contact (1), be provided with fin cover (13), on the external cylindrical surface of the upper end of fin cover (13) and lower contact (1), be provided with pressure cap (10), on the external cylindrical surface of fin cover (13) and pressure cap (10), be provided with seal rubber sleeve (9).
2, Sand control joint according to claim 1, it is characterized in that between piston bush (2) and lower contact (1), being provided with sealing ring (15), between piston bush (2) and piston (6), be provided with sealing ring (5), between piston (6) and lower contact (1), be provided with sealing ring (7), between lower contact (1) and top connection (11), be provided with sealing ring (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02211753 CN2545353Y (en) | 2002-05-10 | 2002-05-10 | Sand control joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02211753 CN2545353Y (en) | 2002-05-10 | 2002-05-10 | Sand control joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2545353Y true CN2545353Y (en) | 2003-04-16 |
Family
ID=33691583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02211753 Expired - Fee Related CN2545353Y (en) | 2002-05-10 | 2002-05-10 | Sand control joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2545353Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863540A (en) * | 2016-04-12 | 2016-08-17 | 中国石油天然气股份有限公司 | Release sub assembly |
| CN109505528A (en) * | 2017-09-15 | 2019-03-22 | 刘玉友 | The application method of safety joint under fluffing of moulding sand formula oil well |
-
2002
- 2002-05-10 CN CN 02211753 patent/CN2545353Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863540A (en) * | 2016-04-12 | 2016-08-17 | 中国石油天然气股份有限公司 | Release sub assembly |
| CN105863540B (en) * | 2016-04-12 | 2018-06-26 | 中国石油天然气股份有限公司 | Release sub assembly |
| CN109505528A (en) * | 2017-09-15 | 2019-03-22 | 刘玉友 | The application method of safety joint under fluffing of moulding sand formula oil well |
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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: 20030416 Termination date: 20100510 |