CN203769690U - Check valve for drilling tool - Google Patents
Check valve for drilling tool Download PDFInfo
- Publication number
- CN203769690U CN203769690U CN201420176869.7U CN201420176869U CN203769690U CN 203769690 U CN203769690 U CN 203769690U CN 201420176869 U CN201420176869 U CN 201420176869U CN 203769690 U CN203769690 U CN 203769690U
- Authority
- CN
- China
- Prior art keywords
- valve
- seal receptacle
- valve body
- flap
- sealing
- 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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- Check Valves (AREA)
Abstract
The utility model relates to a petroleum tool, in particular to a check valve for a drilling tool. The check valve comprises a valve body (1) and a valve element arranged in the valve body. The valve element is composed of a sealing base (2) and a valve clack (3). The sealing base (2) is a cylindrical body with one end closed, an overflowing channel (4) penetrated from front to back is formed in the outer surface of the sealing base (2), the portion, close to the closed end, of the overflowing channel (4) of the sealing base (2) is provided with an overflowing hole (5), and the sealing base (2) is fixed in the valve body (1). The valve clack (3) is a tubular body, one end of the valve clack (3) is inserted in the cavity of the sealing base (2), and a piston (6) is arranged on the outer wall of the other end of the valve clack (3) and matched with the inner wall of the valve body (1) in a sealing mode. A shoulder is arranged on the inner wall of the valve body (1), a spring (7) is arranged between the shoulder and the valve clack (3), and the valve clack (3) is inserted in one end of the sealing base (2) and blocks the overflowing hole (5) under the effect of the spring (7). The check valve has the advantages of being reasonable in structure and reliable in sealing. Drilling fluid does not directly erode the sealing portion, so that the service life is greatly prolonged.
Description
Technical field
The utility model relates to petroleum tool, is specifically related to the architecture advances of drilling tool check valve.
Background technology
Drilling tool check valve (drilling tool check valve such as arrow type flap valve, drilling tool float valve) is the effective tool that prevents blowout in drilling tool, belongs to the one-way control valve in the drill string circulating system.In drilling process, when preventing from making up a joint or pulling out of hole, the drilling fluid in annular space returns to drilling tool and then is sprayed onto on rig floor, and for preventing that bottom fluid from entering the phenomenons such as drilling tool generation well kick and blowout, often connects a drilling tool back-pressure valve in drill string bottom.Traditional drilling tool check valve has arrow valve, butterfly valve, drop-in check valve, cone valve etc., these flap valve come with some shortcomings in structure, sealing, and application life is short, and drilling fluid directly washes away sealing position, sealing position is very easy to erosive wear and lost efficacy, and causes sealing.If erosion was lost efficacy in drilling tool check valve use procedure, just do not have the effect of ball-and-seat, this is very fatal problem.
Summary of the invention
Technical problem to be solved in the utility model is: provide a kind of rational in infrastructure, seal reliable drilling tool check valve.
Technical solution of the present utility model is: it comprises valve body and is located at the spool in valve body, described spool is made up of seal receptacle and flap, seal receptacle is the cylindrical body of one end sealing, seal receptacle external surface is provided with the flow channels before and after connecting, seal receptacle is provided with flowing hole near the flow channels of blind end, seal receptacle is fixed in described valve body, flap is tubular body, flap one end is inserted in the chamber of seal receptacle, the flap other end is provided with piston and valve interior wall is sealed and matched in outer wall, valve interior wall is provided with shoulder, between this shoulder and flap, be provided with spring, under the effect of spring, flap inserts one end of seal receptacle and blocks flowing hole.
Technique effect of the present utility model is: it have rational in infrastructure, seal reliable advantage, direct erosion sealing position of drilling fluid, greatly extend application life.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the sectional view at flap flowing hole place in Fig. 1.
Detailed description of the invention
As illustrated in fig. 1 and 2, it comprises valve body 1 and is located at the spool in valve body, described spool is made up of seal receptacle 2 and flap 3, seal receptacle 2 is the cylindrical body of one end sealing, seal receptacle 2 external surfaces are provided with the flow channels 4 before and after connecting, seal receptacle 2 is provided with flowing hole 5 near the flow channels 4 of blind end, seal receptacle 2 is fixed in described valve body 1, flap 3 is tubular body, flap 3 one end are inserted in the chamber of seal receptacle 2, flap 3 other ends are provided with piston 6 in outer wall and coordinate with valve body 1 inner wall sealing, valve body 1 inwall is provided with shoulder, between this shoulder and flap 3, be provided with spring 7, under the effect of spring 7, flap 3 inserts one end of seal receptacle 2 and blocks flowing hole 5.
In described seal receptacle 2, be provided with sealing lacquer disk(-sc) 8 in blind end, the end of described flap 3 is against on sealing lacquer disk(-sc) 8.
The blind end of described seal receptacle 2 is provided with the water conservancy diversion conical surface 9 in outer face.
In described valve body 1, be provided with the shoulder for locating described seal receptacle 2 non-blind ends, in valve body 1, be provided with positioning seat 10 and be against the blind end of seal receptacle 2.
The inwall of described valve body 1 is provided with annular groove 11, is provided with the external member being made up of jump ring 12, support set 13 and split collar 14 in this annular groove 11, for fixing described positioning seat 10.
The utility model is that drilling liquid pressure promotes flap (non-tight face) Compress Spring, and flap separates drilling liquid flow circulation passage and is opened with seal receptacle, and drilling liquid flow is to flap inside, and one way valve one-way passage forms.Flap carries out specially treated near the surface of sealing one side and improves surperficial erosion resistance ability, has so more increased the application life of this structure flap valve.
The utility model has changed the problem of conventional seals position direct drilled well liquid erosion, and this instrument is different from the check valve structure such as float valve, arrow type valve, sealing principle in the past.This instrument is in the past that drilling liquid pressure directly overcomes spring force by sealing surface and opens, and drilling fluid directly washes away sealing position, and sealing position is very easy to erosive wear and lost efficacy, and causes sealing.The direct erosion non-tight of the utility model drilling fluid position, in the time that pressure overcomes spring force, Compress Spring promotion seal member moves down, and drilling fluid passes through valve body by circulation passage.
Claims (5)
1. drilling tool check valve, comprise valve body (1) and be located at the spool in valve body, it is characterized in that, described spool is made up of seal receptacle (2) and flap (3), seal receptacle (2) is the cylindrical body of one end sealing, seal receptacle (2) external surface is provided with the flow channels (4) before and after connecting, seal receptacle (2) is provided with flowing hole (5) near the flow channels (4) of blind end, seal receptacle (2) is fixed in described valve body (1), flap (3) is tubular body, flap (3) one end is inserted in the chamber of seal receptacle (2), flap (3) other end is provided with piston (6) in outer wall and coordinates with valve body (1) inner wall sealing, valve body (1) inwall is provided with shoulder, between this shoulder and flap (3), be provided with spring (7), under the effect of spring (7), flap (3) inserts one end of seal receptacle (2) and blocks flowing hole (5).
2. drilling tool check valve as claimed in claim 1, is characterized in that, in described seal receptacle (2), is provided with sealing lacquer disk(-sc) (8) in blind end, and the end of described flap (3) is against on sealing lacquer disk(-sc) (8).
3. drilling tool check valve as claimed in claim 1 or 2, is characterized in that, the blind end of described seal receptacle (2) is provided with the water conservancy diversion conical surface (9) in outer face.
4. drilling tool check valve as claimed in claim 1, is characterized in that, is provided with the shoulder for locating the non-blind end of described seal receptacle (2) in described valve body (1), is provided with positioning seat (10) and is against the blind end of seal receptacle (2) in valve body (1).
5. drilling tool check valve as claimed in claim 4, it is characterized in that, the inwall of described valve body (1) is provided with annular groove (11), is provided with the external member being made up of jump ring (12), support set (13) and split collar (14) in this annular groove (11), for fixing described positioning seat (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420176869.7U CN203769690U (en) | 2014-04-14 | 2014-04-14 | Check valve for drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420176869.7U CN203769690U (en) | 2014-04-14 | 2014-04-14 | Check valve for drilling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203769690U true CN203769690U (en) | 2014-08-13 |
Family
ID=51286891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420176869.7U Expired - Fee Related CN203769690U (en) | 2014-04-14 | 2014-04-14 | Check valve for drilling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203769690U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948135A (en) * | 2015-06-29 | 2015-09-30 | 中国石油集团渤海钻探工程有限公司 | Piston type float collar float shoe |
-
2014
- 2014-04-14 CN CN201420176869.7U patent/CN203769690U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104948135A (en) * | 2015-06-29 | 2015-09-30 | 中国石油集团渤海钻探工程有限公司 | Piston type float collar float shoe |
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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: 20140813 Termination date: 20190414 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |