CN203430452U - Bypass valve with good sealing performance for screw drill rod - Google Patents
Bypass valve with good sealing performance for screw drill rod Download PDFInfo
- Publication number
- CN203430452U CN203430452U CN201320532298.1U CN201320532298U CN203430452U CN 203430452 U CN203430452 U CN 203430452U CN 201320532298 U CN201320532298 U CN 201320532298U CN 203430452 U CN203430452 U CN 203430452U
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- hole
- valve body
- spool
- bypass valve
- spring
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Abstract
The utility model discloses a bypass valve with good sealing performance for a screw drill rod. The bypass valve comprises a valve body and a valve element. An external conical threaded connector is arranged on the lower portion of the valve body. A through hole is formed in the valve body, and an internal conical threaded connector is arranged on the upper portion of the through hole. An annular spring mounting seat is arranged in the through hole and located at the lower end of the internal conical threaded connector. A spring is arranged on the spring mounting seat, the valve element is arranged in the through hole and located on the upper portion of the spring, the valve element can press the spring to move up and down, a bypass hole communicated with the through hole is further formed in the circumferential face of the valve body, a screening plate I is arranged in the bypass hole, a limit ring is further arranged in the through hole in the valve body, the limit ring is arranged under the bypass hole, an annular sealing groove I is further formed in the limit ring, and an O-shaped sealing ring is arranged in the sealing groove I. The bypass valve for the screw drill rod is good in sealing performance, and high in practicability and protectiveness.
Description
Technical field
The utility model relates to a kind of bypass valve, relates in particular a kind of screw rod drilling rod bypass valve of good airproof performance.
Background technology
In oil and natural gas industry, need to use a large amount of helicoid hydraulic motors.Helicoid hydraulic motor is comprised of four major parts, is respectively by-pass valve assembly, motor assembly, universal drive shaft assembly and driving-shaft assembly.By-pass valve assembly is assemblied in helicoid hydraulic motor topmost, and first its effect is to connect drill collar or centralizer sub, and it two is that bypass valve core is closed voluntarily when drilling fluid is with pressure while flowing through bypass valve endoporus, and drilling fluid is all for the work of drive screw drilling tool and circulation; After hydraulic pump cuts out, bypass spool up being under spring action opened shape, carries in process on drilling tool, and the drilling fluid in drilling tool is discharged and entered in well by sieve aperture.
When spool is subject to drilling liquid pressure descending, drilling fluid passes through by bypass valve endoporus, can not enter in by-pass prot, mostly at this kind of state, there is next time the situation of improper leakage in present bypass valve, be that spool is in off position time, drilling fluid has small part and enters by-pass prot, makes a trip and more easily causes leakage during bit change, affects bit change-over and use.
Utility model content
The utility model has solved a kind of screw rod drilling rod bypass valve of good airproof performance, has solved the problem that bit change-over and use were easily revealed, affected to drilling fluid when bypass valve core is closed in the past.
For solving above-mentioned technical problem, the utility model is by the following technical solutions: the screw rod drilling rod bypass valve of good airproof performance, comprise valve body and spool, valve body lower portion is provided with outer cone nipple, described valve inner is provided with through hole, through hole top is provided with female cone nipple, described through hole is provided with annular spring mounting seat in female cone nipple lower end, on spring mounting seat, be placed with spring, described spool is placed in through hole and is positioned at spring top, spool compressible spring moves up and down, described valve body periphery is also provided with the by-pass prot being communicated with through hole, in by-pass prot, be provided with sieve plate I, described valve body inner via hole is also provided with spacing ring, spacing ring is positioned at by-pass prot below, on described spacing ring, be also provided with annular seal groove I, in seal groove I, be provided with O RunddichtringO.During work, drilling fluid flows in through hole and forces spool to move downward, Compress Spring, spool is blocked by-pass prot on valve body, and (annular space is led in by-pass prot, annular space refers to be suspended from the space of the tubing string surrounding in well, annular space outer wall can be bore hole or the larger tubing string of external diameter, is sometimes called as annular space), make drilling fluid to dirty.While quitting work, owing to there is no the pressure of drilling fluid, under the effect of spring, spool moves upward, and makes the hole on valve body be communicated with drilling rod inner space and annular space.Spool O RunddichtringO distortion under spool extruding when closing separates bypass valve endoporus and by-pass prot sealing, and bypass valve endoporus and by-pass prot are separated completely, there will not be leakage phenomenon, can not affect and make a trip and more bit change and normally use, practical.
Described spacing ring is positioned at by-pass prot below 12-25 millimeter.When spool Compress Spring moves downward, it is descending excessively that spacing ring can limit spool, avoids excess compression spring and cause spring failure, also can protect spool not to be destroyed simultaneously, fabulous protection spring and spool, extended the two application life, practicality and safe; The pressure producing when the too high spool of spacing ring is larger, and spacing ring easy fracture, is unfavorable for permanent use; Spacing ring is too low can not play good limit effect, and spring is equally fragile, so spacing ring is positioned at by-pass prot below 12-25 millimeter to reach protection spacing ring and good limit effect.
Described O RunddichtringO is Teflon O type sealing ring.Polytetrafluoroethylene (PTFE) is a kind of artificial synthesized polymer material that has used fluorine to replace all hydrogen atoms in polyethylene, this material has the feature of antiacid alkali resistant, anti-various organic solvents, be dissolved in hardly all solvents, simultaneously, polytetrafluoroethylene (PTFE) has resistant to elevated temperatures feature, there is one of decay resistance optimal material in good chemical stability, the corrosion resistance ，Shi world today; O RunddichtringO adopts Teflon O type sealing ring to extend sealing life, and its stability and durability high.
It also includes sieve plate II, in the through hole of described sieve plate II between female cone nipple and spool.Drilling fluid contains partial impurities, impurities accumulation more at most can blocking valve gate open hole or by-pass prot, affected the circulation of valve integral body, required drilling fluid needs the removal of impurities valve internal of being allowed for access, and drilling fluid is less through sieve plate II filtration rear impurity, can reduce the congestion affects of drilling fluid to valve.
The 304 steel matter that described sieve plate I and sieve plate II adopt plating zinc on surface to process.304 steel are stainless steel materials of a kind of versatility, good antirust property, and price is low, has good stainless decay resistance and good anti intercrystalline corrosion performance.Sieve plate I directly contacts with drilling fluid with sieve plate II, not only easily get rusty but also perishable, so adopt 304 steel to extend the application life of sieve plate I and sieve plate II, its plating zinc on surface makes its chemical property more stable, has extended to greatest extent the application life of sieve plate I and sieve plate II simultaneously.
Described outer cone nipple outside tapered tread thread root is provided with seal groove II.For strengthening the sealing of outer cone nipple and bottom jointed rod or drill bit, in seal groove, add sealing ring, the squeeze pressure by junction compresses sealing ring, raising sealing effectiveness.
Described valve body and spool all adopt 40cr stainless steel.40Cr steel is one of most popular steel of machinery manufacturing industry.After modifier treatment, there is good comprehensive mechanical property, its moderate cost, handling ease can obtain certain toughness, plasticity and abrasion resistance after suitable heat treatment, and intensity is high.Valve body and spool all adopt 40cr stainless steel can not only extend the application life of the two, and price reduction, have reduced cost.
Compared with prior art, the beneficial effects of the utility model are: the screw rod drilling rod bypass valve good sealing effect of this good airproof performance of the utility model design, practicality and protectiveness are strong.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the structural representation of the utility model spool while closing.
Structural representation when Fig. 2 is the unlatching of the utility model spool.
Arrow in figure represent drilling liquid flow to.
Label in figure is: 1, female cone nipple; 2, sieve plate II; 3, spring mounting seat; 4, sieve plate I; 5, seal groove I; 6, spacing ring; 7, seal groove II; 8, outer cone nipple; 9, valve body; 10, spool; 11, spring; 12, by-pass prot.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is further described.Embodiment of the present utility model includes but not limited to the following example.
Embodiment
The screw rod drilling rod bypass valve of good airproof performance as shown in Figure 1, comprise valve body 9 and spool 10, valve body 9 bottoms are provided with outer cone nipple 8, described valve body 9 inside are provided with through hole, through hole top is provided with female cone nipple 1, described through hole is provided with annular spring mounting seat 3 in female cone nipple 1 lower end, on spring mounting seat 3, be placed with spring 11, described spool 10 is placed in through hole and is positioned at spring 11 tops, spool 10 compressible spring 11 move up and down, described valve body 9 peripheries are also provided with the by-pass prot 12 being communicated with through hole, in by-pass prot 12, be provided with sieve plate I 4, described valve body 9 inner via holes are also provided with spacing ring 6, spacing ring 6 is positioned at by-pass prot 12 belows, on described spacing ring 6, be also provided with annular seal groove I 5, in seal groove I 5, be provided with O RunddichtringO.
Described spacing ring 6 is positioned at by-pass prot 12 below 12-25 millimeters.
Described O RunddichtringO is Teflon O type sealing ring.
It also includes sieve plate II 2, in the through hole of described sieve plate II 2 between female cone nipple 1 and spool 10.
The 304 steel matter that described sieve plate I 4 and sieve plate II 2 adopt plating zinc on surface to process.
Described outer cone nipple 8 outside tapered tread thread root is provided with seal groove II 7.
Described valve body 9 and spool 10 all adopt 40cr stainless steel.
During the utility model work, drilling fluid forces spool 10 to move downward, Compress Spring 11, and spool 10 is blocked the by-pass prot 12 on valve body 9, makes drilling fluid to dirty; While quitting work, owing to there is no the pressure of drilling fluid, under the effect of spring 11, spool 10 moves upward, and makes the by-pass prot 12 on valve body 9 be communicated with drilling rod inner space and annular space.
The utility model is by adding the structure of spacing ring 6; limited the descending degree of depth of spool 10; fabulous protection spool 10 and spring 11; avoid excessive spool 10 and the spring 11 of causing of drilling liquid pressure to damage, on spacing ring 6, added seal groove I 5 simultaneously, in seal groove I 5, added sealing ring to strengthen the sealing effectiveness of bypass valve; avoid making a trip and more during bit change the drilling fluid in drill string overflow and affect and change and use; total is simple, and cost is low, safety, practicality and good airproof performance.
Be as mentioned above embodiment of the present utility model.The utility model is not limited to above-mentioned embodiment, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technical scheme, within all falling into protection domain of the present utility model.
Claims (7)
1. the screw rod drilling rod bypass valve of good airproof performance, comprise valve body (9) and spool (10), valve body (9) bottom is provided with outer cone nipple (8), described valve body (9) inside is provided with through hole, through hole top is provided with female cone nipple (1), it is characterized in that: described through hole is provided with annular spring mounting seat (3) in female cone nipple (1) lower end, on spring mounting seat (3), be placed with spring (11), described spool (10) is placed in through hole and is positioned at spring (11) top, spool (10) compressible spring (11) moves up and down, described valve body (9) periphery is also provided with the by-pass prot (12) being communicated with through hole, in by-pass prot (12), be provided with sieve plate I (4), described valve body (9) inner via hole is also provided with spacing ring (6), spacing ring (6) is positioned at by-pass prot (12) below, on described spacing ring (6), be also provided with annular seal groove I (5), seal groove I is provided with O RunddichtringO in (5).
2. the screw rod drilling rod bypass valve of good airproof performance according to claim 1, is characterized in that: described spacing ring (6) is positioned at by-pass prot (12) below 12-25 millimeter.
3. the screw rod drilling rod bypass valve of good airproof performance according to claim 1, is characterized in that: described O RunddichtringO is Teflon O type sealing ring.
4. the screw rod drilling rod bypass valve of good airproof performance according to claim 1, is characterized in that: it also includes sieve plate II (2), and described sieve plate II (2) is positioned at the through hole between female cone nipple (1) and spool (10).
5. the screw rod drilling rod bypass valve of good airproof performance according to claim 2, is characterized in that: the 304 steel matter that described sieve plate I (4) and sieve plate II (2) adopt plating zinc on surface to process.
6. the screw rod drilling rod bypass valve of good airproof performance according to claim 1, is characterized in that: described outer cone nipple (8) outside tapered tread thread root is provided with seal groove II (7).
7. the screw rod drilling rod bypass valve of good airproof performance according to claim 1, is characterized in that: described valve body (9) and spool (10) all adopt 40cr stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532298.1U CN203430452U (en) | 2013-08-29 | 2013-08-29 | Bypass valve with good sealing performance for screw drill rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320532298.1U CN203430452U (en) | 2013-08-29 | 2013-08-29 | Bypass valve with good sealing performance for screw drill rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203430452U true CN203430452U (en) | 2014-02-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320532298.1U Expired - Fee Related CN203430452U (en) | 2013-08-29 | 2013-08-29 | Bypass valve with good sealing performance for screw drill rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203430452U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437727A (en) * | 2013-08-29 | 2013-12-11 | 成都科盛石油科技有限公司 | Bypass valve good in sealing performance |
| CN104110228A (en) * | 2014-07-23 | 2014-10-22 | 成都高普石油工程技术有限公司 | Sand-proof bypass valve device for drill rod |
| CN104141466A (en) * | 2014-07-23 | 2014-11-12 | 成都高普石油工程技术有限公司 | Drill rod bypass valve device |
| CN104141466B (en) * | 2014-07-23 | 2017-01-04 | 林文士 | Drilling rod by-pass valve device |
-
2013
- 2013-08-29 CN CN201320532298.1U patent/CN203430452U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103437727A (en) * | 2013-08-29 | 2013-12-11 | 成都科盛石油科技有限公司 | Bypass valve good in sealing performance |
| CN104110228A (en) * | 2014-07-23 | 2014-10-22 | 成都高普石油工程技术有限公司 | Sand-proof bypass valve device for drill rod |
| CN104141466A (en) * | 2014-07-23 | 2014-11-12 | 成都高普石油工程技术有限公司 | Drill rod bypass valve device |
| CN104141466B (en) * | 2014-07-23 | 2017-01-04 | 林文士 | Drilling rod by-pass valve device |
| CN104110228B (en) * | 2014-07-23 | 2017-06-30 | 杨耿纯 | Drilling rod sand prevention by-pass valve device |
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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: 20140212 Termination date: 20140829 |
|
| EXPY | Termination of patent right or utility model |