CN203961860U - Anti-pricked bypass valve - Google Patents
Anti-pricked bypass valve Download PDFInfo
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- CN203961860U CN203961860U CN201420359523.0U CN201420359523U CN203961860U CN 203961860 U CN203961860 U CN 203961860U CN 201420359523 U CN201420359523 U CN 201420359523U CN 203961860 U CN203961860 U CN 203961860U
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- spool
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- shoulder hole
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Abstract
The utility model relates to oilfield drilling and production technology field, relate in particular to a kind of anti-pricked bypass valve, comprise valve body, spool, spring and back-up ring, described spool, spring and back-up ring are arranged in the inner chamber of valve body, and described back-up ring is located at valve body and bottom, the large end of spool cooperation place; The through hole of described valve body is provided with the first shoulder hole outward, junction from described the first shoulder hole and through hole is provided with successively dividing plate, sieve plate, dividing plate and jump ring outside the first shoulder hole, on the inwall of the both sides of described through hole valve body, be respectively equipped with cannelure and the first sealing ring, in described cannelure, sealing shroud is installed, described sealing shroud coordinates with the end part seal of described spool; Distance between described the first sealing ring and described back-up ring is less than the length of described spool.Avoided by-pass prot thorn to leak, reduced the risk of underground work, changed accessory convenient, the possibility of foreign body from blocking, under seal protection, has been reduced in spring position.
Description
Technical field
The utility model relates to oilfield drilling and production technology field, relates in particular to a kind of anti-pricked bypass valve.
Background technology
At present, while using down-hole helicoid hydraulic motor in the drilling engineering of petroleum gas, for the pressure inside and outside balance drilling tool in the process of lower brill, in the process pulling out of hole, make drilling mud in drilling tool can flow into fast in pit shaft and can not take ground pollution rig floor to, in drilling process, make drilling fluid become the machine power that promotes drill bit, general in the combination of drilling tool all with a drilling tool by-pass valve, the spool of general drilling tool by-pass valve, spring and valve seat and be to put into successively valve body from male joint one end of valve body, circlip groove is set one on valve body inner edge, back-up ring is installed, to prevent spool, valve seat is fallen in well.
Applicant has applied for the simple and easy bypass valve of rear installed for a kind of helicoid hydraulic motor a few days ago, the patent No.: 201310099568.9, it comprises valve body, spool, spring and back-up ring, described spool, spring and back-up ring are arranged in the inner chamber of valve body, at valve body male thread end, be provided with the locating shoulder for retainer spring mounting center, described back-up ring is located at valve body and bottom, the large end of spool cooperation place; The through hole of described valve body is provided with shoulder hole outward, from the junction of described the first shoulder hole and through hole, dividing plate, sieve plate, dividing plate and jump ring is installed outside the first shoulder hole successively.To its objective is in order solving and to prevent that spool from dropping, avoid bulk landwaste to enter the technical problem in bypass valve inner chamber.Applicant finds due in whole drilling process in actual use, the situation more complicated of down-hole can cause spool to be not closed completely, cause bypass valve to leak in by-pass prot place thorn, make the inner and outside annular space of drilling tool UNICOM, the serious disconnected whole bypass valve of meeting thorn causes down-hole accident.
Utility model content
The purpose of this utility model is to overcome the deficiency of above-mentioned technology, and a kind of anti-pricked bypass valve is provided, and prevents that bypass valve from leaking in by-pass prot place thorn, improves the sealing of bypass valve.
The utility model for achieving the above object, by the following technical solutions: a kind of anti-pricked bypass valve, comprise valve body, spool, spring and back-up ring, described spool, spring and back-up ring are arranged in the inner chamber of valve body, and described back-up ring is located at valve body and bottom, the large end of spool cooperation place; The through hole of described valve body is provided with the first shoulder hole outward, junction from described the first shoulder hole and through hole is provided with successively dividing plate, sieve plate, dividing plate and jump ring outside the first shoulder hole, it is characterized in that: on the inwall of the both sides of described through hole valve body, be respectively equipped with cannelure and the first sealing ring, in described cannelure, sealing shroud is installed, described sealing shroud coordinates with the end part seal of described spool; Distance between described the first sealing ring and described back-up ring is less than the length of described spool.
Preferably, the lower end of described through hole is provided with shoulder hole, and described spring is placed in this shoulder hole, and shoulder hole is provided with ladder platform, and described spool locks at this ladder platform place.Spool is in the situation that closing, and one end of spool can lock at this ladder platform place, prevents that spool from continuing mobile, and after spool is stuck in herein, the other end of spool is just fitted with sealing shroud, thereby has guaranteed the sealing between spool and valve body.
Preferably, on described spool, the one end near described back-up ring is provided with double-layer seal rings.Improve the sealing performance of spool and valve body part.
The beneficial effects of the utility model are: this apparatus structure is simply easy to processing, by-pass prot on spool in prior art is removed, spool is shortened, in the inside of valve body, a sealing shroud coordinating with spool is installed again, prevent that mud from flowing out from the gap between spool and valve body, in the situation that seal spool is not tight, the inner mud pressure of drilling tool is high, flow velocity is fast, easily by the by-pass prot earial drainage on spool, bypass valve is caused to waterpower cutting, cause the meeting that drilling tool internal pressure loss is serious to make drilling tool fracture cause down-hole accident, so just avoided by-pass prot thorn to leak, reduced cost of production, replacing accessory is convenient, spring position is under seal protection, reduced the possibility of foreign body from blocking.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
In figure: 1, valve body; 2, spool; 3, spring; 4, shoulder hole; 5, jump ring; 6, dividing plate; 7, sieve plate; 8, dividing plate; 9, through hole; 10, ladder platform; 11, cannelure; 12, sealing shroud; 13, sealing ring; 14, shoulder hole; 15, sealing ring; 16, sealing ring; 17, jump ring.
The specific embodiment
Below in conjunction with accompanying drawing and preferred embodiment, describe the specific embodiment of the present utility model in detail.As shown in Figure 1, a kind of anti-pricked bypass valve, comprises valve body 1, spool 2, spring 3 and back-up ring 17, and described spool, spring and back-up ring are arranged in the inner chamber of valve body, and described back-up ring is located at valve body and bottom, the large end of spool cooperation place, the through hole of described valve body is provided with the first shoulder hole 4 outward, junction from described the first shoulder hole and through hole 9 is provided with successively dividing plate 8 outside the first shoulder hole, sieve plate 7, dividing plate 6 and jump ring 5, on the inwall of the both sides of described through hole valve body, be respectively equipped with cannelure 11 and the first sealing ring 13, sealing shroud 12 is installed in described cannelure, described sealing shroud coordinates with the end part seal of described spool, this structure is and difference of the prior art, by by the contraction in length of spool, guarantee that spool is communicated with valve inner at the effect lower through-hole of spring, thereby saved and on spool, outputed by-pass prot, prior art has been saved the operation of perforate on the one hand relatively, avoided by-pass prot thorn to leak, seal spool cover can coordinate closely with sealing shroud on the other hand, thereby guaranteed that mud is from the sealing between spool and valve body.Distance between described the first sealing ring and described back-up ring is less than the length of described spool, like this spool move up and down the effect that can play switch, through hole can be blocked, during lifting, can expose through hole again.
In order to control the travel distance of spool, the lower end of described through hole is provided with shoulder hole 14, and described spring is placed in this shoulder hole, and shoulder hole is provided with ladder platform 10, and described spool locks at this ladder platform place.Spool is in the situation that closing, and one end of spool can lock at this ladder platform place, prevents that spool from continuing mobile, and after spool is stuck in herein, the other end of spool is just fitted with sealing shroud, thereby has guaranteed the sealing between spool and valve body.One end near described back-up ring on described spool is provided with double-layer seal rings 15,16.Improve the sealing performance of spool and valve body part.
In the process of lower brill, because slush pump does not start, there is no pressure, therefore spool is opened under the effect of spring, the drilling mud that enters drilling tool in well enters annular space by the through hole valve body, owing to there is no by-pass prot, thereby, mud can directly enter from the through hole of valve body, to spool lower area, play the effect of the inside and outside head of liquid of balance drilling tool, lower brill is complete, start to creep into, after slush pump starts, drilling fluid can promote the elastic force that spool overcomes spring downwards, the sidewall of spool blocks through hole, thereby close the through hole that outwards flows, the thrust of drilling fluid is concentrated on helicoid hydraulic motor, pressure is converted to mechanical rotation energy, drive drill bit is put into.
This apparatus structure is simply easy to processing, by-pass prot on spool in prior art is removed, spool is shortened, in the inside of valve body, a sealing shroud coordinating with spool is installed again, prevent that mud from flowing out from the gap between spool and valve body, spool is in the situation that opening, the drilling mud that enters drilling tool in well enters in valve body by the through hole valve body, rather than pass through again the by-pass prot on spool in prior art, so just avoided by-pass prot thorn to leak, reduced cost of production, replacing accessory is convenient, spring position is under seal protection, reduced the possibility of foreign body from blocking.
The above is only preferred embodiment of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. an anti-pricked bypass valve, comprises valve body, spool, spring and back-up ring, and described spool, spring and back-up ring are arranged in the inner chamber of valve body, and described back-up ring is located at valve body and bottom, the large end of spool cooperation place; The through hole of described valve body is provided with the first shoulder hole outward, junction from described the first shoulder hole and through hole is provided with successively dividing plate, sieve plate, dividing plate and jump ring outside the first shoulder hole, it is characterized in that: on the inwall of the both sides of described through hole valve body, be respectively equipped with cannelure and the first sealing ring, in described cannelure, sealing shroud is installed, described sealing shroud coordinates with the end part seal of described spool; Distance between described the first sealing ring and described back-up ring is less than the length of described spool.
2. anti-pricked bypass valve according to claim 1, is characterized in that: the lower end of described through hole is provided with shoulder hole, and described spring is placed in this shoulder hole, and shoulder hole is provided with ladder platform, and described spool locks at this ladder platform place.
3. anti-pricked bypass valve according to claim 2, is characterized in that: the one end near described back-up ring on described spool is provided with double-layer seal rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420359523.0U CN203961860U (en) | 2014-06-30 | 2014-06-30 | Anti-pricked bypass valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420359523.0U CN203961860U (en) | 2014-06-30 | 2014-06-30 | Anti-pricked bypass valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203961860U true CN203961860U (en) | 2014-11-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420359523.0U Active CN203961860U (en) | 2014-06-30 | 2014-06-30 | Anti-pricked bypass valve |
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| Country | Link |
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| CN (1) | CN203961860U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735925A (en) * | 2016-04-29 | 2016-07-06 | 天津立林石油机械有限公司 | Semi-closed piston bypass valve for screw rod drilling tool |
-
2014
- 2014-06-30 CN CN201420359523.0U patent/CN203961860U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105735925A (en) * | 2016-04-29 | 2016-07-06 | 天津立林石油机械有限公司 | Semi-closed piston bypass valve for screw rod drilling tool |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |