CN200952381Y - Charging self-releasing ball seak - Google Patents
Charging self-releasing ball seak Download PDFInfo
- Publication number
- CN200952381Y CN200952381Y CNU2005200855330U CN200520085533U CN200952381Y CN 200952381 Y CN200952381 Y CN 200952381Y CN U2005200855330 U CNU2005200855330 U CN U2005200855330U CN 200520085533 U CN200520085533 U CN 200520085533U CN 200952381 Y CN200952381 Y CN 200952381Y
- Authority
- CN
- China
- Prior art keywords
- ball seat
- sliding sleeve
- sliding bushing
- tubing string
- seating nipple
- 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 provides a self-relief pressure ball seat for a pipe column pressure test device, mainly consisting of an upper contact, a sliding bushing, a working barrel, a ball seat, a support sleeve and a spring. The upper part of the upper contact is connected with the pipe column need pressure test. The upper part of the working barrel is connected with the upper contact by thread buckle. The sliding bushing is sheathed inside the upper contact and the outside diameter matches with the contact interface of the inner diameter of the upper contact inner cavity. The upper part of the ball seat is connected with the sliding bushing and the outside diameter of the ball seat matches with the contact interface of the sliding bushing. And the lower part is held tightly by the support sleeve through the thread buckle. The upper part of the support sleeve is connected with the lower part of the sliding bushing by the thread buckle. The spring in compression state is arranged between the sliding bushing and the working barrel. The utility model has the advantages of simple structure, convenient operation and production safety, and also could guarantee the liquid in the oil pipe to automatically flow into the oil well after pipe pressure test, with no influence on other functions of the whole pipe column and no pollution on the oil well.
Description
Technical field
The utility model relates to a kind of tubing string pressure testing device of oil well repairing operation, especially a kind of automatic pressure relief ball seat of tubing string pressure testing device.
Prior art
Existing tubing string pressure testing device is in the oil well pipe bottom that needs pressure testing, the ball seat of an oil well pump is installed, in the time of the needs pressure testing, drop into steel ball from the top of tubing string, steel ball falls on the ball seat, seals whole tubing string, after suppressing, to whole tubing string pressure testing, the sealing of checking tubing string, whether decision takes next step operation.Its weak point is: if whole tubing string does not leak, when tripping out tubing string, the liquid of tubing string inside is because can not self-unloading, the inevitable oil well of taking out of along with the oil pipe that trips out, when shackle, make dirty easily worker clothes of workman, pollute the environment in well site, cause the wet and slippery of well head, be easy to generate security incident.
Summary of the invention
The purpose of this utility model is to overcome the defective of present prior art, and a kind of automatic pressure relief ball seat of tubing string pressure testing device is provided.
For achieving the above object, technical characterictic of the present utility model is such: a kind of automatic pressure relief ball seat, mainly by top connection, sliding sleeve, seating nipple, ball seat, support set, spring is formed, top connection top is connected with the tubing string that needs pressure testing, seating nipple top and top connection are by screwed connection, sliding sleeve is contained in the inside of top connection, its external diameter has the requirement of cooperation with the inner chamber internal diameter contact surface of top connection, ball seat top connects sliding sleeve, the external diameter of ball seat has the requirement of cooperation with the contact surface of sliding sleeve, and the supported cover in bottom compresses by screw thread, and support set top and cover bottom, Weihe are by screwed connection, spring becomes compressive state between sliding sleeve and seating nipple.
Technical characterictic of the present utility model can also be: the lower end screw thread of seating nipple can be connected with the sand washing nib.
Compared with prior art, the utility model has simple in structure, and is easy to operate, and tubing string is after pressure testing, and the liquid of assurance oil pipe inside can be let out in the oil well automatically and go, and does not influence other function of whole tubing string again, does not pollute advantages such as oil well, production safety.
Description of drawings
Accompanying drawing is the utility model structure chart.
The specific embodiment
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
A kind of automatic pressure relief ball seat, mainly by top connection 1, sliding sleeve 3, seating nipple 4, ball seat 6, support set 7, spring 8 is formed, top connection 1 top is connected with the tubing string that needs pressure testing, seating nipple 4 tops and top connection 1 are by screwed connection, sliding sleeve 3 is contained in the inside of top connection 1, its external diameter has the requirement of cooperation with the inner chamber internal diameter contact surface of top connection 1, ball seat 6 tops connect sliding sleeve 3, the external diameter of ball seat 6 has the requirement of cooperation with the contact surface of sliding sleeve 3, the supported cover in ball seat 6 bottoms 7 compresses by screw thread, support set 7 tops and sliding sleeve 3 bottoms are by screwed connection, and spring 8 becomes compressive state between sliding sleeve 3 and seating nipple.
The lower end screw thread of seating nipple 4 can be connected with the sand washing nib.
When needs carry out pressure testing to tubing string, drop into steel ball from well head, steel ball falls on the ball seat 6, and sealed ball seat 6 is divided into chamber (A) 2, chamber (B) 10 liang of chambeies with tubing string.Pumping liquid in tubing string, liquid by sliding sleeve 3 unload liquid hole 5 time produce throttling action, at this moment chamber (A) 2 internal pressures improve, it is descending to promote sliding sleeve 3, and compression spring 8, and the duct of unloading in liquid hole 5 and the top connection 1 on the sliding sleeve 3 produces displacement simultaneously, close and unload the liquid passage, under the sealing of sealing ring, chamber (A) 2 pressure continue to improve, and whole tubing string is carried out pressure testing.The compression of spring 8 is controlled by the step on the seating nipple 4.The pressure that produces on the sliding sleeve 3 is all born by support set 7 and seating nipple 4.After the tubing string pressure testing finishes, the well head release, at this moment sliding sleeve 3 resets under the promotion of spring 8, unloads discharge orifice 5 alignment, unloads the liquid passage and opens, and the liquid in the tubing string slides space UNICOM by unloading liquid hole 5 with sliding sleeve 3, has kept the balance of inside and outside liquid level.
When lift pipe string, the liquid in the above tubing string in ground all is discharged in the oil well by unloading liquid passage 9, has avoided the pollution in well site.This device can be finished technologies such as normal well-flushing, sand washing before not having pitching.
Claims (2)
1, a kind of automatic pressure relief ball seat, mainly form by top connection, sliding sleeve, seating nipple, ball seat, support set, spring, it is characterized in that top connection top is connected with the tubing string that needs pressure testing, seating nipple top and top connection are by screwed connection, and sliding sleeve is contained in the inside of top connection, and ball seat top connects sliding sleeve, the supported cover in bottom compresses by screw thread, support set top and sliding sleeve bottom are by screwed connection, and spring becomes compressive state between sliding sleeve and seating nipple.
2, automatic pressure relief ball seat according to claim 1 is characterized in that the lower end screw thread of seating nipple is connected with the sand washing nib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200855330U CN200952381Y (en) | 2005-07-29 | 2005-07-29 | Charging self-releasing ball seak |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200855330U CN200952381Y (en) | 2005-07-29 | 2005-07-29 | Charging self-releasing ball seak |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200952381Y true CN200952381Y (en) | 2007-09-26 |
Family
ID=38810683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200855330U Expired - Fee Related CN200952381Y (en) | 2005-07-29 | 2005-07-29 | Charging self-releasing ball seak |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200952381Y (en) |
-
2005
- 2005-07-29 CN CNU2005200855330U patent/CN200952381Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |