CN201236634Y - Reverse circulation connector - Google Patents
Reverse circulation connector Download PDFInfo
- Publication number
- CN201236634Y CN201236634Y CNU2008201097659U CN200820109765U CN201236634Y CN 201236634 Y CN201236634 Y CN 201236634Y CN U2008201097659 U CNU2008201097659 U CN U2008201097659U CN 200820109765 U CN200820109765 U CN 200820109765U CN 201236634 Y CN201236634 Y CN 201236634Y
- Authority
- CN
- China
- Prior art keywords
- joint body
- reverse circulation
- shoulder
- spring
- slide block
- 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
The utility model relates to a reverse circulation joint which is characterized in that the joint comprises a drift diameter joint body , and a sliding block housing in sleeved connection with the excircle of the drift diameter joint body; a shoulder and a pressure balancing hole are formed on the joint body; the space between the shoulder of the joint body and the sliding block housing forms a closed chamber; the lower end of the closed chamber is communicated with a main fluid pathway of the joint body through the pressure balancing hole; a spring push rod, a spring gasket and a reset spring are mounted in sequence from top to bottom inside the closed chamber; seal rings are arranged on the inner wall and the outer wall of the spring push rod respectively; and a reverse circulation hole is further formed on the joint body. The utility model has the following advantages: by adopting the structure of a larger drift diameter, the tool can be used for realizing the pipe column cleaning and the well killing prior to the well repairing; and after the pressure applied to the annular fluid is suspended, the reset spring pushes the push rod, thereby automatically closing the flow channel between the push rod and the annular reverse circulation hole. Furthermore, the joint has the advantages of simple structure, convenient operation, low manufacturing cost, and safe and reliable use.
Description
Technical field
The utility model belongs to the oilfield well completion technical field, particularly a kind ofly relates to the reverse circulation sub that the oilfield well completion operation is used.
Background technology
In present known oil well repairing operation, in order to trip out flow string, keep the cleaning and the safety of flow string to trip out flow string, carry out anti-circulation well cleanup and kill job, general way is to add gate gurgle valve in the flow string down at present, break gate gurgle valve by caber and carry out anti-circulation well cleanup, open gate gurgle valve, realize so above-mentioned instrument is difficult and be difficult to throw by the method for the bigger oil well of hole deviation or rate of over-all angle change.
Summary of the invention
The utility model provides a kind of simple in structure, reverse circulation sub of being convenient to operate for solving the technical problem that exists in the known technology.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: reverse circulation sub, it is characterized in that: comprise a latus rectum joint body and by the slide block outer cover on its cylindrical of screw thread socket, on joint body, be shaped on shoulder and pressure compensation opening, constitute an airtight chamber between joint body shoulder and the slide block outer cover, link up by pressure compensation opening between airtight chamber lower end and joint body primary flow channel, spring push-rod is housed in the airtight chamber from top to bottom successively, spring shim and back-moving spring, be respectively equipped with sealing ring on the spring push-rod inner and outer wall, also be shaped on reversing port on the described joint body.
The utility model can also adopt following technical scheme:
Reversing port on the described joint body is evenly to distribute.
Described pressure compensation opening is positioned at joint body shoulder and slide block outer cover airtight chamber lower end.
Described slide block outer cover inwall is shaped on the locating shoulder that is used for the spring push-rod location.
Back-moving spring between described joint body shoulder and slide block outer cover in the chamber is positioned at outside the primary flow channel.
Advantage and the good effect that the utlity model has are: because the utility model adopts big latus rectum structure design, carry out anti-circulation well cleanup and kill-job by reverse circulation sub before the well workover, clean out the oil gas in the above oil pipe of reverse circulation sub.On carry flow string, the following crimp head in the oil layer protection valve is extracted the oil layer protection valve; Again reverse circulation washing kuppe and top tubing string with the anti-pit shaft that recycles of the oil gas in the whole production tubing string, trip out flow string and carry out follow-up workover treatment.The utility model also has advantages such as simple, the easy to operate and cost of manufacture of structure design is cheap in addition.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1, joint body; 1-1, shoulder; 2, O RunddichtringO; 3, reversing port; 4, spring push-rod; 5, spring shim; 6, back-moving spring; 7, slide block outer cover; 7-1, locating shoulder; 7-2, cannelure; 8, O RunddichtringO; 9, screw thread; 10, pressure compensation opening.
The specific embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1, reverse circulation sub, comprise a latus rectum joint body 1 and by the slide block outer cover 7 on its cylindrical of screw thread 9 sockets, slide block outer cover inwall is shaped on the shoulder 7-1 that is used for the spring push-rod location, on joint body, be shaped on shoulder 1-1 and pressure compensation opening 10, constitute an airtight chamber between joint body shoulder 1-1 and the slide block outer cover 7, link up by pressure compensation opening 10 between airtight chamber lower end and joint body primary flow channel.Spring push-rod 4, spring shim 5 and back-moving spring 6 are housed in the airtight chamber from top to bottom successively, and the spring push-rod head is stuck in shoulder 7-1 place in the slide block outer cover, and spring one end withstands joint body shoulder 1-1, and the other end connects spring push-rod 4.Described spring push-rod is two, is respectively equipped with twice O RunddichtringO 2 on spring push-rod 4 inner and outer walls, also evenly is shaped on reversing port 3 on joint body.Slide block outer cover inwall relevant position is shaped on cannelure 7-2.Joint body and slide block outer cover screw thread 9 socket places are equipped with O RunddichtringO 8.Because this joint adopts latus rectum maximization design, when operation, the annular fluid between shell and the sleeve pipe is suppressed, pressure acts on the bottom of two spring push-rods, and then the compression spring, after the two seals circle on the spring push-rod pushed away corresponding seal groove, passage is opened, and sets up anti-circulation.After removing the annular fluid applied pressure, back-moving spring promotes push rod and closes the anti-passage that circulates automatically.
Operating principle of the present utility model is: the carrier that the utility model uses is short circuit head, fashionable under fastening means, its lower end connects a ball seat, carries out anti-circulation well cleanup and kill-job by reverse circulation sub before the well workover, cleans out the oil gas in the above oil pipe of reverse circulation sub.On carry flow string, the following crimp head in the oil layer protection valve is extracted the oil layer protection valve; Again reverse circulation washing kuppe and top tubing string with the anti-pit shaft that recycles of the oil gas in the whole production tubing string, trip out flow string and carry out follow-up workover treatment.
Claims (5)
1. reverse circulation sub, it is characterized in that: comprise a latus rectum joint body and by the slide block outer cover on its cylindrical of screw thread socket, on joint body, be shaped on shoulder and pressure compensation opening, constitute an airtight chamber between joint body shoulder and the slide block outer cover, link up by pressure compensation opening between airtight chamber lower end and joint body primary flow channel, spring push-rod, spring shim and back-moving spring are housed in the airtight chamber from top to bottom successively, be respectively equipped with sealing ring on the spring push-rod inner and outer wall, also be shaped on reversing port on the described joint body.
2. reverse circulation sub according to claim 1 is characterized in that: the reversing port on the described joint body is for evenly distributing.
3. reverse circulation sub according to claim 1 is characterized in that: described pressure compensation opening is positioned at joint body shoulder and slide block outer cover airtight chamber lower end.
4. reverse circulation sub according to claim 1 is characterized in that: described slide block outer cover inwall is shaped on the locating shoulder that is used for the spring push-rod location.
5. reverse circulation sub according to claim 1 is characterized in that: the back-moving spring between described joint body shoulder and slide block outer cover in the chamber is positioned at outside the primary flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201097659U CN201236634Y (en) | 2008-08-11 | 2008-08-11 | Reverse circulation connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201097659U CN201236634Y (en) | 2008-08-11 | 2008-08-11 | Reverse circulation connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201236634Y true CN201236634Y (en) | 2009-05-13 |
Family
ID=40649373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201097659U Expired - Fee Related CN201236634Y (en) | 2008-08-11 | 2008-08-11 | Reverse circulation connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201236634Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942972A (en) * | 2010-08-23 | 2011-01-12 | 四川宏华石油设备有限公司 | Balancer for protecting joint |
| CN110005379A (en) * | 2019-05-28 | 2019-07-12 | 西南石油大学 | A kind of voltage-controlled sleeve type spray head of gas hydrates layer jet crushing |
-
2008
- 2008-08-11 CN CNU2008201097659U patent/CN201236634Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101942972A (en) * | 2010-08-23 | 2011-01-12 | 四川宏华石油设备有限公司 | Balancer for protecting joint |
| CN101942972B (en) * | 2010-08-23 | 2013-07-31 | 四川宏华石油设备有限公司 | Balancer for protecting joint |
| CN110005379A (en) * | 2019-05-28 | 2019-07-12 | 西南石油大学 | A kind of voltage-controlled sleeve type spray head of gas hydrates layer jet crushing |
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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 |
Granted publication date: 20090513 Termination date: 20160811 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |