CN203626735U - High-performance drill rod check valve - Google Patents
High-performance drill rod check valve Download PDFInfo
- Publication number
- CN203626735U CN203626735U CN201320881645.1U CN201320881645U CN203626735U CN 203626735 U CN203626735 U CN 203626735U CN 201320881645 U CN201320881645 U CN 201320881645U CN 203626735 U CN203626735 U CN 203626735U
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- China
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- valve
- valve body
- cylindrical hole
- hole
- drill rod
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- Expired - Fee Related
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Abstract
The utility model discloses a high-performance drill rod check valve. The high-performance drill rod check valve is composed of components such as a valve body, a valve seat, a valve element and a compression spring, wherein the valve body is divided into an upper section and a lower section, the upper end of the lower-section valve body is integrally connected with the lower end of the upper-section valve body by a thread hole, a thread column, a cylindrical hole and a cylindrical column; the valve seat is installed in the cylindrical hole in the lower end surface of the upper-section valve body; the conical valve element and the compression spring are installed in the step-shaped cylindrical hole in the middle of the lower-section valve body; both of the conical valve element and the compression spring are guided by virtue of the own excircles and the wall of the step-shaped cylindrical hole in the middle of the lower-section valve body, thus the conical valve element is aligned with the inner hole of the valve seat to open and close the valve. In addition, the technical measures of surfacing hard alloy on the sealing surface of the conical valve element, adding sealing rings to the matched surfaces of the components, and the like, the high-performance drill rod check valve has the characteristics of being easier to machine, more convenient to detach and install, large in flow area, low in fluid resistance, high in guide accuracy, good in sealing performance and long in service life.
Description
Affiliated technical field
The utility model relates to petroleum machinery, the innovative design of " drill rod check valve " in drilling-production equipment.
Background technology
In oil well repairing operation, existing few with the matching used ball-and-seat kind of drilling rod, performance is not high yet, mainly exist the problem of two aspects: the one, the spool in existing product, there is a very long guide peg at heart position more therein, with coordinating with the pilot hole at valve body center, to guarantee spheroid or cone and the valve seat orifice identical and sealing effectively of spool; Its shortcoming is that stability and the degree of accuracy of guiding is poor, affects sealing performance; But also dwindled the area of passage of valve channel, and increase fluid resistance, reduce discharge value.The 2nd, existing ball-and-seat valve body, how as a whole; Its axial dimension is longer, and structure is more complicated, has increased difficulty of processing, and is unfavorable for dismounting and maintenance.
Summary of the invention
The purpose of this utility model is to provide that a kind of guiding accuracy is high, good seal performance, fluid resistance is little, area of passage is large, easy drill rod check valve is keeped in repair in dismounting.
The technical solution of the utility model is: valve body is divided into upper and lower two joints, and the lower end of the upper end of lower joint valve body and upper joint valve body, is connected into an entirety with screwed hole, post and cylindrical hole, post; In the cylindrical hole of the lower surface of upper joint valve body, valve seat is housed; In stairstepping cylindrical hole in the middle of lower joint valve body, taper valve core and Compress Spring are housed; Taper valve core and Compress Spring, all rely on the cylindrical of self and the middle stairstepping cylinder hole wall of lower joint valve body to lead, and makes taper valve core aim at valve seat endoporus, controlled valve.
Because the utility model adopts upper and lower two joint valve bodies, make to grow and more complicated valve body processing becomes more easy, and be more conducive to dismounting and maintenance; In the middle of taper valve core and valve body, there is not longer guide peg and pilot hole, therefore circulation area and flow that can intensifying valve reduce fluid resistance; Adopt the stairstepping cylinder hole wall in the middle of lower joint valve body, the cylindrical of taper valve core and Compress Spring is led, have that guiding accuracy is high, good seal performance; In addition pile-up welding hard alloy on the sealing surface of taper valve core adds the technical measures such as sealing ring on the fitting face of part, makes the technical performance of drill rod check valve obtain General Promotion.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the utility model general structure full section schematic diagram.
Fig. 2 is in the utility model Fig. 1, removes A-A place cross-sectional schematic after taper valve core and Compress Spring.
Component title shown in attached number in the figure is as follows:
1, upper joint valve body, 2, lower joint valve body, 3, valve seat, 4, hole back-up ring, 5, taper valve core, 6, Compress Spring, 7, O RunddichtringO, 8, O RunddichtringO.
The specific embodiment
In Fig. 1, the utility model is made up of parts such as valve body, valve seat, spool and Compress Springs.Difference is that valve body is divided into upper and lower two joints: the upper surface of above saving valve body (1) is to use the conical screw hole connecting with drilling rod, lower surface is the cylindrical hole for valve seat (3) are installed, and centre is the connecting hole that runs through conical screw hole and valve seat orifice.The outside of upper joint valve body (1): top is cylinder, is processed with the simple groove in 1 road on cylinder; Below is one section of screw thread cylinder and one section of cylinder, is processed with the seal groove of twice mounting O-shaped sealing ring (8) on cylinder, uses with screwed hole and the cylindrical hole of lower joint valve body (2) and is connected.The upper surface of lower joint valve body (2) is to use the screwed hole and the cylindrical hole that connect with upper joint valve body (1), lower surface is the MEDIA FLOW through hole with pencil-beam mouth, centre is the stairstepping cylindrical hole that runs through upper and lower end face, and stairstepping cylindrical hole is used for installing taper valve core (5) and Compress Spring (6).The outside of lower joint valve body (2): top is one section of cylinder growing, its diameter is identical with the exterior circular column of upper joint valve body (1) top; Below is one section of cone bar screw thread, uses with drilling rod and connects.Taper valve core (5) upper end is the frustum of a cone, contacts with its taper seat with the endoporus of valve seat (3), and valve is carried out to switch; Lower end is the thinner cylinder of a joint diameter, is inserted in the endoporus of Compress Spring (6); Centre is the shorter transition circle cylinder of length, uses with the stairstepping cylindrical hole in the middle of lower joint valve body (2) and coordinates, and play the guiding role.For improving the anti-wear performance of sealing surface, on the taper seat of taper valve core (5), heap is welded with carbide alloy.
In Fig. 2, in order to improve the circulation area of valve body, reduce fluid resistance; Under the utility model, save the middle stairstepping cylindrical hole of valve body (2), in the circle wall between the cylindrical hole of its maximum gauge and the cylindrical hole of installation Compress Spring (6), be also processed with many uniform minor diameter through holes; And the cylindrical hole of installation taper valve core (5), the minor diameter through hole uniform with many all broken wall communicates.
To adopting upper joint valve body (1) and the valve seat (3) of matched in clearance or interference fits, in the cylindrical hole of valve seat (3) is installed in upper joint valve body (1) lower surface, cut respectively one circlip groove and a road sealing groove, back-up ring for hole (4) and O RunddichtringO (7) have been housed.
In the time that the utility model gos deep into down-hole along with drilling rod, the pressure fluid of top can push like a cork taper valve core (5) open and Compress Spring (6) enters down-hole; If while there is the anomalies such as blowout, taper valve core (5), under the acting in conjunction of Compress Spring (6) and downhole fluid, promptly stops up the endoporus of valve seat (3), valve-off.
Claims (4)
1. a high performance drill rod check valve, formed by parts such as valve body, valve seat, spool and Compress Springs, it is characterized in that: valve body is divided into upper and lower two joints, the lower end of the upper end of lower joint valve body (2) and upper joint valve body (1), is connected into an entirety with screwed hole, post and cylindrical hole, post; In the cylindrical hole of the lower surface of upper joint valve body (1), valve seat (3) is housed; In the stairstepping cylindrical hole in the middle of lower joint valve body (2), taper valve core (5) and Compress Spring (6) are housed; Taper valve core (5) and Compress Spring (6), all rely on self cylindrical and the middle stairstepping cylinder hole wall guiding of lower joint valve body (2), make taper valve core (5) aim at the endoporus of valve seat (3), controlled valve.
2. drill rod check valve according to claim 1, it is characterized in that: the stairstepping cylindrical hole in the middle of lower joint valve body (2), in the circle wall between the cylindrical hole of its maximum gauge and the cylindrical hole of installation Compress Spring (6), be also processed with many uniform minor diameter through holes; And the cylindrical hole of installation taper valve core (5), the minor diameter through hole uniform with many all broken wall communicates.
3. drill rod check valve according to claim 1, it is characterized in that: to adopting upper joint valve body (1) and the valve seat (3) of matched in clearance or interference fits, in the cylindrical hole of valve seat (3) is installed in upper joint valve body (1) lower surface, cut respectively one circlip groove and a road sealing groove, back-up ring for hole (4) and O RunddichtringO (7) have been housed.
4. drill rod check valve according to claim 1, is characterized in that: on the taper seat of taper valve core (5), heap is welded with carbide alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320881645.1U CN203626735U (en) | 2013-12-24 | 2013-12-24 | High-performance drill rod check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320881645.1U CN203626735U (en) | 2013-12-24 | 2013-12-24 | High-performance drill rod check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203626735U true CN203626735U (en) | 2014-06-04 |
Family
ID=50813224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320881645.1U Expired - Fee Related CN203626735U (en) | 2013-12-24 | 2013-12-24 | High-performance drill rod check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203626735U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373095A (en) * | 2014-09-15 | 2015-02-25 | 中国石油天然气股份有限公司 | Hollow layering steam injecting system |
| CN112483019A (en) * | 2019-09-11 | 2021-03-12 | 航天科工惯性技术有限公司 | Drill collar with stepped sealing structure |
-
2013
- 2013-12-24 CN CN201320881645.1U patent/CN203626735U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104373095A (en) * | 2014-09-15 | 2015-02-25 | 中国石油天然气股份有限公司 | Hollow layering steam injecting system |
| CN112483019A (en) * | 2019-09-11 | 2021-03-12 | 航天科工惯性技术有限公司 | Drill collar with stepped sealing structure |
| CN112483019B (en) * | 2019-09-11 | 2023-01-31 | 航天科工惯性技术有限公司 | Drill collar with stepped sealing structure |
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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: 20140604 Termination date: 20201224 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |