CN201778758U - Coiled tubing back-pressure valve - Google Patents
Coiled tubing back-pressure valve Download PDFInfo
- Publication number
- CN201778758U CN201778758U CN2010202825222U CN201020282522U CN201778758U CN 201778758 U CN201778758 U CN 201778758U CN 2010202825222 U CN2010202825222 U CN 2010202825222U CN 201020282522 U CN201020282522 U CN 201020282522U CN 201778758 U CN201778758 U CN 201778758U
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- CN
- China
- Prior art keywords
- coiled tubing
- centralizer body
- pressure valve
- valve
- spring
- Prior art date
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- Expired - Fee Related
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Abstract
A coiled tubing back-pressure valve aims at overcoming the following defect of the conventional check valve: due to a centralizing rod installed on the check valve, a flow passage becomes smaller, thereby affecting the normal operation of coiled tubing construction. The back-pressure valve comprises an upper joint, a lower joint, a valve ball, a centralizing body and a spring, wherein the upper and the lower joints are fixedly connected, the lower end part of the centralizing body is positioned in an internal hole at the lower part of the lower joint, the spring is arranged in the middle of the excircle of the centralizing body and positioned on an internal boss at the lower end of the lower joint, the valve ball is positioned in a tapered hole between the upper end of the centralizing body and the lower end of the upper joint, an axial through-hole is formed at the center of the centralizing body, a radial groove is formed on the upper end surface of the centralizing body, and a radial flow hole is formed on the rod body of the centralizing body. The utility model has the benefits that the structure is simple; and a flow passage at the lower part of a return valve is effectively enlarged, thereby providing the safety guarantee for the coiled tubing operation.
Description
Affiliated technical field
The utility model relates to the downhole tool in a kind of coiled tubing operation, especially relates to a kind of coiled tubing back-pressure valve.
Background technology
In oil and gas development coiled tubing construction operation, working solution need normally inject into well by tubing string, and cannot upwards flow along coiled tubing, thereby guarantees the safety of construction operation.The coiled tubing back-pressure valve is the security tool a kind of commonly used that carries out the coiled tubing operation, and particularly during Operating Pressure, used tubing string all needs to be equipped with back-pressure valve.The coiled tubing back-pressure valve is generally common ball-and-seat, and valve ball is realized resetting under the effect of its underpart righting rod and spring thereof, and working solution can flow downward by ball-and-seat, stops the liquid in the pit shaft upwards to flow by ball-and-seat.The ball-and-seat that uses causes fluid course to diminish because of righting rod is installed in coiled tubing construction operation process at present, influences normally carrying out of coiled tubing construction operation.
The utility model content
Cause fluid course to diminish in order to overcome existing ball-and-seat because of righting rod is installed, influence the deficiency that the coiled tubing construction operation normally carries out, the utility model provides a kind of coiled tubing back-pressure valve.
The technical scheme that its technical problem that solves the utility model adopts is: the coiled tubing back-pressure valve, comprise top connection, lower contact, valve ball, centralizer body, spring, top connection is fixedlyed connected with lower contact, the lower end part of centralizer body is in the endoporus of lower contact bottom, centralizer body cylindrical middle part is equipped with spring, spring is positioned on the inner convex platform of lower contact lower end, valve ball is between the conical bore of centralizer body upper end and top connection lower end, there is axially extending bore at the center of centralizer body, centralizer body has radial groove on the upper surface, and the radial flow of liquid hole is arranged on the centralizer body body of rod.Radial flow of liquid hole on the centralizer body body of rod is an axial long hole, and quantity is more than 2 or 2.Radial groove on the centralizer body is 2～4, is distributed on the upper surface of centralizer body.
The beneficial effects of the utility model are, and are simple in structure, effectively enlarged the fluid course of return valve bottom, for the coiled tubing operation provides safety guarantee.
Description of drawings
Fig. 1 is the utility model coiled tubing back-pressure valve structural representation.
Fig. 2 is the A-A sectional drawing of Fig. 1.
Among the figure: 1. top connection, 2. conical bore, 3. valve ball, 4. radial groove, 5. centralizer body, 6. spring, 7. lower contact, 8. radial flow of liquid hole.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
The utility model coiled tubing back-pressure valve comprises top connection 1, lower contact 7, valve ball 3, centralizer body 5, spring 6, and top connection 1 is fixedlyed connected with lower contact 7; The conical bore 2 of top connection 1 lower end is a valve seat; The endoporus of lower contact 7 is up big and down small shoulder hole, and the lower end part of centralizer body 5 is in lower contact 1 bottom endoporus, and centralizer body 5 cylindricals middle part is equipped with spring 6, and spring 6 is positioned on the lower contact 1 lower end inner convex platform.Valve ball 3 is between the conical bore of centralizer body 5 upper ends and top connection 1 lower end.Centralizer body 5 cylindricals are up big and down small multidiameter, and the axially extending bore at centralizer body 5 centers is a fluid course; Radial groove 4 is arranged on the upper surface, and the quantity of radial groove 4 is 2～4 usually, and is distributed on centralizer body 5 upper surfaces.Radial flow of liquid hole 8 is arranged on the body of rod of centralizer body 5, and radial flow of liquid hole 8 is an axial long hole, and quantity is more than 2 or 2, and along body of rod circumference uniform distribution.
The utility model coiled tubing back-pressure valve adopts ball and conical surface seal structure design, and steel ball prevents that effectively borehole fluid from upwards flowing along coiled tubing, guaranteed safety of construction under the effect of centralizer body, spring.
When borehole fluid pressure was higher than the oil pipe internal pressure, centralizer body was on the conical surface of the conical bore that under the effect of spring valve ball is pushed into the top connection lower end, and back-pressure valve is in closed condition, prevented that borehole fluid from upwards flowing.When construction operation, working solution is injected oil pipe, under the effect of working fluid pressure, promote valve ball, centralizer body is descending, back-pressure valve is opened, and working solution injects tubing string.The groove that the centralizer body upper end is uniform, make working solution enter the centralizer body centre bore along groove, there is the radial flow of liquid hole at the centralizer body middle part simultaneously, working solution enters the axially extending bore at the center of centralizer body through the radial flow of liquid hole, working solution can flow downward by two passages inside and outside the centralizer body, and enough flow quantity assurance construction operation safety is carried out smoothly.After the working solution that is through with injected, it is up that centralizer body promotes valve ball under the effect of spring, and back-pressure valve cuts out automatically.
Claims (4)
1. coiled tubing back-pressure valve, comprise top connection, lower contact, valve ball, centralizer body, spring, top connection is fixedlyed connected with lower contact, the lower end part of centralizer body is in the endoporus of lower contact bottom, centralizer body cylindrical middle part is equipped with spring, spring is positioned on the inner convex platform of lower contact lower end, valve ball is between the conical bore of centralizer body upper end and top connection lower end, it is characterized in that: there is axially extending bore at the center of centralizer body (5), centralizer body (5) has radial groove (4) on the upper surface, on centralizer body (5) body of rod radial flow of liquid hole (8) is arranged.
2. according to the described coiled tubing back-pressure valve of claim 1, it is characterized in that: the radial flow of liquid hole (8) on described centralizer body (5) body of rod is axial long hole.
3. according to the described coiled tubing back-pressure valve of claim 2, it is characterized in that: radial flow of liquid hole (8) quantity on described centralizer body (5) body of rod is more than 2 or 2.
4. according to the described coiled tubing back-pressure valve of claim 3, it is characterized in that: described, the radial groove (4) on the centralizer body (5) is 2～4, is distributed on the upper surface of centralizer body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202825222U CN201778758U (en) | 2010-08-05 | 2010-08-05 | Coiled tubing back-pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202825222U CN201778758U (en) | 2010-08-05 | 2010-08-05 | Coiled tubing back-pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201778758U true CN201778758U (en) | 2011-03-30 |
Family
ID=43791971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202825222U Expired - Fee Related CN201778758U (en) | 2010-08-05 | 2010-08-05 | Coiled tubing back-pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201778758U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457620A (en) * | 2018-03-16 | 2018-08-28 | 江苏航天鸿鹏数控机械有限公司 | Pass through the electro-hydraulic driving back-pressure valve and its control method of remote control |
| CN108468531A (en) * | 2018-03-16 | 2018-08-31 | 江苏航天鸿鹏数控机械有限公司 | Pass through the underground back-pressure valve and control method of drilling rod speed Control |
| CN108518201A (en) * | 2018-03-16 | 2018-09-11 | 江苏航天鸿鹏数控机械有限公司 | A kind of anti-overflow self-starting underground back-pressure valve |
| CN108533215A (en) * | 2018-03-16 | 2018-09-14 | 江苏航天鸿鹏数控机械有限公司 | The underground back-pressure valve and control method controlled by ground tubing string acoustic communication |
| RU211993U1 (en) * | 2022-03-24 | 2022-07-01 | Анатолий Леонтьевич Шанаурин | CHECK VALVE |
-
2010
- 2010-08-05 CN CN2010202825222U patent/CN201778758U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457620A (en) * | 2018-03-16 | 2018-08-28 | 江苏航天鸿鹏数控机械有限公司 | Pass through the electro-hydraulic driving back-pressure valve and its control method of remote control |
| CN108468531A (en) * | 2018-03-16 | 2018-08-31 | 江苏航天鸿鹏数控机械有限公司 | Pass through the underground back-pressure valve and control method of drilling rod speed Control |
| CN108518201A (en) * | 2018-03-16 | 2018-09-11 | 江苏航天鸿鹏数控机械有限公司 | A kind of anti-overflow self-starting underground back-pressure valve |
| CN108533215A (en) * | 2018-03-16 | 2018-09-14 | 江苏航天鸿鹏数控机械有限公司 | The underground back-pressure valve and control method controlled by ground tubing string acoustic communication |
| RU211993U1 (en) * | 2022-03-24 | 2022-07-01 | Анатолий Леонтьевич Шанаурин | CHECK VALVE |
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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: 20110330 Termination date: 20190805 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |