CN104314491A - Method for protecting spring of drill pipe bypass valve - Google Patents
Method for protecting spring of drill pipe bypass valve Download PDFInfo
- Publication number
- CN104314491A CN104314491A CN201410412896.4A CN201410412896A CN104314491A CN 104314491 A CN104314491 A CN 104314491A CN 201410412896 A CN201410412896 A CN 201410412896A CN 104314491 A CN104314491 A CN 104314491A
- Authority
- CN
- China
- Prior art keywords
- spring
- plane
- bypass valve
- valve body
- spool
- 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.)
- Pending
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/10—Valve arrangements in drilling-fluid circulation systems
- E21B21/103—Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a method for protecting a spring of a drill pipe bypass valve. During the protection process, the vertical movement of the slope is transferred to the horizontal movement, and the amount of compression of the spring is lowered, so that the spring is prevented from over compression; a limiting plane I and a limiting plane II are used to limit the distance of the vertical movement, so that the over compression of the spring can be further prevented, the service life of the spring is prolonged, and furthermore the service life of the whole bypass valve is prolonged.
Description
Technical field
The present invention relates to helicoid hydraulic motor field, particularly, relate to a kind of method for drilling rod bypass valve protection spring.
Background technology
Need to use a large amount of helicoid hydraulic motors in oil and natural gas industry.Helicoid hydraulic motor is made up of four major parts, is bypass valve, motor, universal drive shaft and power transmission shaft respectively.Existing bypass valve is the accessory of helicoid hydraulic motor, be arranged on helicoid hydraulic motor in upper end, first its effect is connect drill collar and centralizer sub, it is two when to be that drilling fluid is with pressure when turn on pump flow through bypass valve inner via hole, motion is downward vertically until close voluntarily for bypass valve core, and drilling fluid is used for the work of drive screw drilling tool and circulation; Make bypass valve inner via hole space be communicated with annular space when termination of pumping, be the space of the drill string surrounding be suspended from well, annular space outer wall can be also the tubing string that external diameter is larger, is sometimes called as annular space.Cooling fluid flows to annular space, avoid making a trip and more bit change time drill string in drilling fluid overflow.
Existing bypass valve operating principle: during work, valve cuts out, and pump is opened, and drilling fluid forces spool to move downward, Compress Spring, and spool blocks the hole on valve body, and annular space is led in this hole, makes drilling fluid dirty.When quitting work, valve is opened, and pump cuts out, and owing to not having the pressure of drilling fluid, under the action of the spring, spool moves upward, and makes the hole on valve body be communicated with drilling rod inner space and annular space.The hole that valve body has also is provided with filter, for filtering foreign matter.
The shortcoming of existing bypass valve is: when drilling liquid pressure is excessive, and spring is overly compressed, and exceeds its spring limit, and high strength Compress Spring repeatedly easily produces metal fatigue makes spring failure.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method for drilling rod bypass valve protection spring, overcomes because excessive and high-frequency Compress Spring cause the problem of spring failure.
The present invention's adopted technical scheme that solves the problem is: a kind of method for drilling rod bypass valve protection spring, comprise the following steps, first, bypass valve comprises valve body and spool, the through hole for injecting drilling fluid is provided with at valve inner, in through hole upper end, female cone nipple is set, drilling rod is connected on female cone nipple, sieve plate I is provided with in through hole, make sieve plate I between female cone nipple and spool, sieve plate I can filter the drilling fluid injected, valve body lower end is provided with outer cone nipple, drill collar is connected on outer cone nipple, secondly, one side adjacent with valve body for spool is offered into inclined-plane I, lower end, inclined-plane I is provided with spacing plane I, then lateral aperture is offered at valve inner, in lateral aperture inside, spring is set, and the resetting block to be connected with spring, resetting block one end is that plane is connected with spring, the other end is that inclined-plane II coordinates with the inclined-plane I of spool, spacing horizontal plane II is also provided with in lateral aperture lower end, spacing horizontal plane II can control the distance that whole spool vertically declines, it is made to remain at a safe distance, Compress Spring that can not be excessive.Impurity in the through hole being arranged so that in valve body of sieve plate I reduces, reduce the probability of bypass valve through hole blocking, impurity content in simultaneously also less drilling well, outer cone nipple is namely at the threaded connector that valve body lower end outer circumference surface contact ring vacancy is offered, the threaded connector that female cone nipple and valve body upper end inner peripheral surface contact interior bone place offer, inclined-plane I is small top and big bottom annular section, this tangent plane is equivalent to the long short isosceles trapezoid of going to the bottom of upper base and rotates around central axis and form, inclined-plane II is big top and small bottom annular section, this tangent plane is equivalent to a short long isosceles trapezoid of going to the bottom of upper base and rotates around central axis and form, inclined-plane I and inclined-plane II are parallel to each other, spacing plane I is for being opened in the horizontal annular tangent plane of spool outer wall, spacing Planar Mechanism is the horizontal annular tangent plane being opened in valve interior wall, spacing plane I and spacing Planar Mechanism is parallel to each other and vertical direction has lap, lateral aperture is annular horizontal hole and through hole is pointed in perforate, spring is inserted in annular horizontal hole, again annular resetting block is installed on spring, annular resetting block offers inclined-plane II, when turn on pump, when injecting drilling fluid in valve body inner via hole, drilling fluid starts squeezing through-hole inwall and produces pressure, due to the effect spool vertical downward movement of pressure, when spool move downward inclined-plane I to contact with inclined-plane II and to start to extrude time, resetting block starts to apply a horizontal applied force to spring, spool continues to move downward, resetting block starts slowly extrusion spring, in spring makes resetting block be headed into by spool in valve body lateral aperture because the extruding being subject to resetting block starts to shrink, until spacing horizontal plane I contacts with spacing horizontal plane II lap and starts to extrude, when closing pump, in through hole, pressure reduces, spring starts to recover deformation and produces restoring force, under the effect of spring-return power, spool upwards pushes up by resetting block until spring deformation is replied completely.The present invention will be moved both vertically by inclined-plane and be converted into horizontal movement, the decrement of the spring reduced, thus prevent spring to be overly compressed, spacing plane I and spacing Planar Mechanism limit the distance moved both vertically, prevent spring to be overly compressed further, thus overcome because of excessively and high-frequency Compress Spring cause the problem of spring failure.
Further, valve body periphery is also provided with the by-pass prot be communicated with through hole, is provided with sieve plate II in by-pass prot.Be connected with through hole in by-pass prot, be connected with annular space outward, arranging on the one hand when termination of pumping of sieve plate II, drilling liquid flow filters drilling fluid again to during annular space, impurity is avoided to enter in drilling well, in the through hole preventing the impurity in annular space from entering in bypass valve on the other hand.
Further, sieve plate II is waveform foldable structure.Add contact area during filtration, make filtration more abundant, reduce impurity content further.
To sum up, the invention has the beneficial effects as follows:
1, overcome because of excessively and high-frequency Compress Spring cause the problem of spring failure.
2, decrease the impurity content entering liquid in bypass valve, improve the application life of whole bypass valve.
Accompanying drawing explanation
Fig. 1 is the structural representation of bypass valve;
Fig. 2 is the structural representation of resetting-mechanism.
Mark and corresponding component title in accompanying drawing:
1-female cone nipple; 2-sieve plate I; 3-valve body; 4-inclined-plane I; 5-resetting block; 6-inclined-plane II; 7-spring; 8-lateral aperture; 9-spool; 10-spacing plane I; 11-spacing Planar Mechanism; 12-sieve plate II; 13-by-pass prot; 14-outer cone nipple.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, to the detailed description further of invention do, but embodiments of the present invention are not limited thereto.
Embodiment: as Fig. 1, as indicated with 2, a kind of method for drilling rod bypass valve protection spring, comprise the following steps, first, bypass valve comprises valve body 3 and spool 9, the through hole for injecting drilling fluid is provided with in valve body 3 inside, in through hole upper end, female cone nipple 1 is set, drilling rod is connected on female cone nipple 1, sieve plate I 2 is provided with in through hole, make sieve plate I 2 between female cone nipple 1 and spool 9, sieve plate I 2 can filter the drilling fluid injected, valve body 3 lower end is provided with outer cone nipple 14, drill collar is connected on outer cone nipple 14, secondly, one side adjacent with valve body 3 for spool 9 is offered into inclined-plane I 4, lower end, inclined-plane I 4 is provided with spacing plane I 10, then lateral aperture 8 is offered in valve body 3 inside, in lateral aperture 8 inside, spring 7 is set, and the resetting block 5 to be connected with spring 7, resetting block 5 one end is that plane is connected with spring 7, the other end is that inclined-plane II 6 coordinates with the inclined-plane I 4 of spool 9, spacing horizontal plane II 11 is also provided with in lateral aperture 8 lower end, spacing horizontal plane II 11 can control the distance that whole spool 9 vertically declines, it is made to remain at a safe distance, Compress Spring that can not be excessive, valve body 3 periphery is also provided with the by-pass prot 13 be communicated with through hole, sieve plate II 12 is provided with in by-pass prot, sieve plate II 12 is waveform foldable structure, This structure increases contact area during filtration, make filtration more abundant, be connected with through hole in by-pass prot 13, be connected with annular space outward, sieve plate II 12 arrange on the one hand when termination of pumping, drilling liquid flow filters drilling fluid again to during annular space, impurity is avoided to enter in drilling well, in the through hole preventing the impurity in annular space from entering in bypass valve on the other hand.。
As mentioned above, the present invention can be realized preferably.
Claims (3)
1. the method for drilling rod bypass valve protection spring, it is characterized in that, comprise the following steps, first, bypass valve comprises valve body (3) and spool (9), the through hole for injecting drilling fluid is provided with in valve body (3) inside, female cone nipple (1) is set in through hole upper end, drilling rod is connected on female cone nipple (1), sieve plate I (2) is provided with in through hole, sieve plate I (2) is made to be positioned between female cone nipple (1) and spool (9), sieve plate I (2) can filter the drilling fluid injected, valve body (3) lower end is provided with outer cone nipple (14), drill collar is connected on outer cone nipple (14), secondly, one side adjacent with valve body (3) for spool (9) is offered into inclined-plane I (4), lower end, inclined-plane I (4) is provided with spacing plane I (10), then lateral aperture (8) is offered in valve body (3) inside, in lateral aperture (8) inside, spring (7) is set, and the resetting block (5) to be connected with spring (7), resetting block (5) one end is that plane is connected with spring (7), the other end is that inclined-plane II (6) coordinates with the inclined-plane I (4) of spool (9), spacing horizontal plane II (11) is also provided with in lateral aperture (8) lower end, spacing horizontal plane II (11) can control the distance that whole spool (9) vertically declines, it is made to remain at a safe distance, Compress Spring that can not be excessive.
2. a kind of method for drilling rod bypass valve protection spring according to claim 1, it is characterized in that, described valve body (3) periphery is also provided with the by-pass prot (13) be communicated with through hole, is provided with sieve plate II (12) in by-pass prot.
3. a kind of method for drilling rod bypass valve protection spring according to claim 1, it is characterized in that, described sieve plate II (12) is waveform foldable structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410412896.4A CN104314491A (en) | 2014-08-21 | 2014-08-21 | Method for protecting spring of drill pipe bypass valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410412896.4A CN104314491A (en) | 2014-08-21 | 2014-08-21 | Method for protecting spring of drill pipe bypass valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104314491A true CN104314491A (en) | 2015-01-28 |
Family
ID=52369787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410412896.4A Pending CN104314491A (en) | 2014-08-21 | 2014-08-21 | Method for protecting spring of drill pipe bypass valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104314491A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916443A (en) * | 2018-09-30 | 2018-11-30 | 山西风雷钻具有限公司 | A kind of valve body |
-
2014
- 2014-08-21 CN CN201410412896.4A patent/CN104314491A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108916443A (en) * | 2018-09-30 | 2018-11-30 | 山西风雷钻具有限公司 | A kind of valve body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |
|
| WD01 | Invention patent application deemed withdrawn after publication |