CN1737331A - Automatic pressure relief ball seat - Google Patents
Automatic pressure relief ball seat Download PDFInfo
- Publication number
- CN1737331A CN1737331A CN 200510044685 CN200510044685A CN1737331A CN 1737331 A CN1737331 A CN 1737331A CN 200510044685 CN200510044685 CN 200510044685 CN 200510044685 A CN200510044685 A CN 200510044685A CN 1737331 A CN1737331 A CN 1737331A
- Authority
- CN
- China
- Prior art keywords
- ball seat
- sliding sleeve
- pressure relief
- automatic pressure
- 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.)
- Pending
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Abstract
This invention provides a self releasing tee of the pipe column pressure testing device, which comprises upper adaptor, sleeve, mandrel, tee, supporting sleeve and spring; after the pipe column being pressure tested, it can ensure the fluid in the oil pipe flow to the oil well automatically without affecting other function of the whole oil pipe; besides, it does not pollute the oil well.
Description
Technical field
The present invention 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 objective of the invention is to overcome the defective of present prior art, 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 invention 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 sliding sleeve bottom are by screwed connection, spring becomes compressive state between sliding sleeve and seating nipple.
Technical characterictic of the present invention can also be: the lower end screw thread of seating nipple can be connected with the sand washing nib.
Compared with prior art, the present invention 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 a structure chart of the present invention.
The specific embodiment
Describe embodiments of the invention 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 2,10 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 2 cavity pressures improve, it is descending to promote sliding sleeve 3, and compression spring 8, and the duct 5 of unloading in liquid hole 5 and the top connection 1 on the sliding sleeve 3 produces displacements simultaneously, close and unload the liquid passage, under the sealing of sealing ring, 2 cavity pressures 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 (4)
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, a kind of automatic pressure relief ball seat according to claim 1 is characterized in that the external diameter of sliding sleeve has the requirement of cooperation with the inner chamber internal diameter contact surface of top connection.
3, a kind of automatic pressure relief ball seat according to claim 1 is characterized in that the external diameter of ball seat has the requirement of cooperation with the contact surface of sliding sleeve.
4, a kind of automatic pressure relief ball seat according to claim 1 is characterized in that the lower end screw thread of seating nipple can be connected with the sand washing nib.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510044685 CN1737331A (en) | 2005-09-09 | 2005-09-09 | Automatic pressure relief ball seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510044685 CN1737331A (en) | 2005-09-09 | 2005-09-09 | Automatic pressure relief ball seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1737331A true CN1737331A (en) | 2006-02-22 |
Family
ID=36080250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510044685 Pending CN1737331A (en) | 2005-09-09 | 2005-09-09 | Automatic pressure relief ball seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1737331A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769140A (en) * | 2010-01-07 | 2010-07-07 | 曲占庆 | Device for displacing oil underground, preventing reflow and automatically relieving pressure |
| CN106609664A (en) * | 2015-12-24 | 2017-05-03 | 陕西创源石油科技有限公司 | Multifunctional pressure test ball seat for well repair |
-
2005
- 2005-09-09 CN CN 200510044685 patent/CN1737331A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101769140A (en) * | 2010-01-07 | 2010-07-07 | 曲占庆 | Device for displacing oil underground, preventing reflow and automatically relieving pressure |
| CN101769140B (en) * | 2010-01-07 | 2013-06-05 | 西安石油大学 | Device for displacing oil underground, preventing reflow and automatically relieving pressure |
| CN106609664A (en) * | 2015-12-24 | 2017-05-03 | 陕西创源石油科技有限公司 | Multifunctional pressure test ball seat for well repair |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |