CN103541686A - Switchable reverse circulation valve - Google Patents
Switchable reverse circulation valve Download PDFInfo
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- CN103541686A CN103541686A CN201310464323.1A CN201310464323A CN103541686A CN 103541686 A CN103541686 A CN 103541686A CN 201310464323 A CN201310464323 A CN 201310464323A CN 103541686 A CN103541686 A CN 103541686A
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- urceolus
- pipe
- ball seat
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Abstract
The invention discloses a switchable reverse circulation valve. The switchable reverse circulation valve comprises a first connector, a core tube, an outer barrel, a spring, a valve tube, a ball seat and a second connector. The two ends of the outer barrel are fixedly connected with the first connector and the second connector respectively. The core tube, the valve tube and the ball seat are sequentially arranged in the outer barrel. The ball seat is fixedly connected with the second connector. One end of the core tube is fixedly connected with the first connector. The valve tube is provided with two sections with different outer diameters, wherein the section with the larger diameter of the valve tube is inserted between the core tube and the outer barrel and is connected between the outer barrel and the core tube in a sliding and sealing mode. The core tube is sleeved with the spring. The two ends of the spring act on the first connector and the valve tube respectively. The core tube is provided with pressure transmission holes in the radial direction. An inner spherical surface is formed on the end portion of the ball seat. The end portion of the valve tube is provided with an outer spherical surface which is matched with the inner spherical surface. The outer barrel is provided with radial through holes. The first connector and the outer barrel are sealed through an O-shaped ring, and the ball seat and the second connector are sealed through an O-shaped ring. The switchable reverse circulation valve can meet operation requirements repeatedly and improve production efficiency.
Description
Technical field
The present invention relates to a kind of can switching regulator reverse circulation valve, belong to Oil/gas Well downhole tool technical field.
Background technology
In order to improve oil, gas recovery ratio, oil field at home is more and more valued the drilling mode of horizontal well, and in the completion mode of horizontal well, a lot of wells are selection level well subsection acidizing pressure break barefoot completion mode again, in implementing acid fracturing volume increase work progress, reverse circulation valve is for the instrument of the anti-circulation well cleanup after deep well fracturing, and it is in order to guarantee the circulation seal in direct circulation process, can meet the requirement of anti-circulation well cleanup again simultaneously.Traditional reverse circulation valve is when implementing Oil/gas Well underground work, is mainly used in straight well or open hole completion of horizontal well segmentation volume increase transformation process.After completing pitching pressure break, carry out, in manufacturing process, occurring sand plug, by annular space, suppress the shear pin making on reverse circulation valve and cut off, expose circulation canal after setting, make to set up in annular space and oil pipe the effect being communicated with.Can realize the object of removing sand plug, but cannot guarantee the requirement of working continuously, need changing-over tubing string again, thereby also need to enhance productivity and reliability.
In view of problem and defect that above-mentioned existing reverse circulation valve in use exists, the inventor is actively studied and is innovated, with invent a kind of can switching regulator reverse circulation valve, eliminate the defect that prior art exists, make it more there is practicality.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of can switching regulator reverse circulation valve, can meet the in the situation that of lift pipe string not, can repetitiously realize job requirements, greatly reduced duty cycle and cost, improved and produced efficiency.
In order to solve the problems of the technologies described above, the present invention has adopted following technical scheme:
A kind of can switching regulator reverse circulation valve, comprise: the first joint, core pipe, urceolus, spring, valve pipe, ball seat and the second joint, wherein the two ends of urceolus are fixedly connected with the second joint with the first joint respectively, and described the first joint and the second joint stretch into respectively in described urceolus, in described urceolus, from the first joint to the second joint direction, be followed successively by core pipe, valve pipe and ball seat, described ball seat is fixedly connected with described the second joint, one end of described core pipe is inserted in the first joint and is fixedly connected with the first joint, between described core pipe and urceolus, form annular space, described valve pipe has two sections that external diameter does not wait, one section that the external diameter of described valve pipe is larger is positioned at described annular space, between the external diameter of described valve pipe larger a section and urceolus and core pipe, slipper seal is connected, described spring housing is in the outside of core pipe, and the two ends of spring act on respectively described the first joint and described valve pipe, on described core pipe, radially offer pressure transmission hole, described pressure transmission hole is communicated with the annular space part between core pipe inside and core pipe and urceolus, the end of described ball seat forms Internal Spherical Surface, the end of less one section of the external diameter of described valve pipe has the spherical outside surface matching with the Internal Spherical Surface of described ball seat, on described urceolus, have radial direction through hole, described radial direction through hole is corresponding to less one section of the external diameter of described valve pipe, between described the first joint and urceolus and between ball seat and the second joint, pass through seal with O ring.
As preferably, the two ends of described urceolus are connected with the second joint screw thread with the first joint respectively.
As preferably, described urceolus and the first joint and the second joint are fixed by hold-down screw.
As preferably, between described core pipe and described the first joint, be tightly connected.
As preferably, described pressure transmission hole is opened in core pipe near the first joint one side.
As preferably, described the first joint is for having internal thread female joint, and the second joint is for having external screw thread male joint.
As preferably, on the outside wall surface of described the first joint and internal face, have annular seal groove, in annular seal groove, be provided for respectively the O shape circle sealing between the first joint and urceolus and core pipe.
As preferably, in the outside wall surface of described ball seat, have annular seal groove, in described annular seal groove, be provided for the O shape circle sealing between the second joint and ball seat.
As preferably, on the outside wall surface of described valve pipe and internal face, have annular seal groove, O shape circle is set in described annular seal groove, described valve pipe is by O shape circle and described urceolus and the described core seal of tube.
Compared with prior art, beneficial effect of the present invention is:
Of the present invention can switching regulator reverse circulation valve be the sealing means that has utilized valve pipe and ball seat, rationally utilized fully the function of spring and oil pressure, by the pressure transmission hole on core pipe, tubing pressure is applied on valve pipe, push valve pipe to ball seat place, make the spherical outside surface of valve pipe and the Internal Spherical Surface of ball seat is airtight contacts, close circulation canal, its feature is exactly that tubing pressure is higher, and sealing performance is better.Casing pressure can allow casing pressure act on valve pipe by the radial direction through hole on urceolus.When casing pressure acts on axial force on valve pipe and is greater than axial force on valve pipe of tubing pressure and spring acting in conjunction, pressure is separated valve pipe and ball seat by the radial direction through hole on urceolus, forms circulation canal.So the present invention can meet repeatedly the requirement of switch circulation, is a kind of safe and reliable novel product.
Accompanying drawing explanation
Fig. 1 of the present inventionly a kind ofly can switching regulator reverse circulation valve structure partly cut open figure.
Fig. 2 is A portion enlarged drawing in Fig. 1.
Fig. 3 is the structural representation of valve pipe.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, but not as a limitation of the invention.
Fig. 1 of the present inventionly a kind ofly can switching regulator reverse circulation valve structure partly cut open figure.Fig. 2 is A portion enlarged drawing in Fig. 1.Fig. 3 is the structural representation of valve pipe.As shown in Figure 1 to Figure 3, a kind of can switching regulator reverse circulation valve, comprise: the first joint 1, core pipe 2, urceolus 3, spring 4, valve pipe 5, ball seat 6 and the second joint 7, the first joint 1 with the second joint 7 for reverse circulation valve of the present invention is connected with other pipe fittings (oil pipe etc.), wherein the two ends of urceolus 3 are fixedly connected with the second joint 7 with the first joint 2 respectively, and the first joint 1 and the second joint 7 stretch into respectively in urceolus 3, in urceolus 3, from the first joint 1 to second joint 7 directions, be followed successively by core pipe 2, valve pipe 5 and ball seat 6, ball seat 6 is fixedly connected with the second joint 7, one end of core pipe 2 is inserted in the first joint 1 and is fixedly connected with the first joint 1, between core pipe 2 and urceolus 3, form annular space 8, valve pipe 5 has two sections that external diameter does not wait, thereby form stress surface product moment, one section 501 that the external diameter of valve pipe 5 is larger is stretched in the annular space 8 forming between core pipe 2 and urceolus 3, and 2 slipper seals are connected larger one section 501 of the external diameter of valve pipe 5 with core pipe with urceolus 3 respectively, spring 4 is enclosed within the outside of core pipe 2, it is the annular space 8 that spring 4 is positioned at urceolus 3 and 2 formation of core pipe, and the two ends of spring 4 act on respectively the first joint 1 and valve pipe 5, on core pipe 2, radially offer pressure transmission hole 201, pressure transmission hole 201 is communicated with the annular space 8 between core pipe 2 inside and core pipe 2 and urceolus 3, the end of ball seat 6 forms Internal Spherical Surface, the end of less one section 502 of the external diameter of valve pipe 5 has the spherical outside surface 503 matching with the Internal Spherical Surface of ball seat 6, on urceolus 3, have radial direction through hole 301, radial direction through hole 301 is corresponding to less one section 502 of the external diameter of valve pipe 5, between the first joint 1 and urceolus 3 and between ball seat 5 and the second joint 7, by O shape circle 9, seal.Radial direction through hole 301 on urceolus 3 is upwards uniformly distributed at urceolus for 3 weeks.In Fig. 1, broken circle represents the circle at spherical outside surface 503 places of valve pipe 5 ends.Between two sections that the external diameter of valve pipe 5 of the present invention does not wait, form step 504.In the internal face of valve pipe 5 and outside wall surface, have annular seal groove, and O shape circle 9 is set in annular seal groove, to realize the sealing between valve pipe 5 and urceolus 3 and core pipe 2.
The two ends of urceolus 3 are fixedly connected with by screw thread with the second joint 7 with the first joint 1 respectively.For further increasing the steadiness connecting, urceolus 3 and the first joint 1 and the second joint 7 are fixing by hold-down screw 10 again.Certainly, the two ends of urceolus 3 also can adopt other modes to be fixedly connected with the first joint 1 and the second joint.
Between core pipe 2 and the first joint 1, be also tightly connected.Sealing in the present invention between each parts can be by seal with O ring, can be also to realize sealing by the cooperation between parts or other modes.When adopting seal with O ring, on one or two that can be in two parts that are connected, open annular seal groove, then O shape circle is located in annular seal groove.Such as offering respectively annular seal groove on the outside wall surface at the first joint 1 and internal face, O shape circle is set respectively for sealing between the first joint 1 and urceolus 3 and core pipe 2 in annular seal groove.In the outside wall surface of ball seat 6, have annular seal groove, O shape circle is set for the sealing between the second joint 7 and ball seat 6 in annular seal groove.
The first joint 1 has the internal thread for being connected with other pipe fittings, and the first joint 1 is female joint, and the second joint 7 has the external screw thread for being connected with other pipe fittings, and the second joint is male joint.
The ball face sealing mode of valve pipe 5 with ball seat 6 of can switching regulator reverse circulation valve having utilized of the present invention, rationally utilized fully the function of spring and oil pressure, by the pressure transmission hole on the radial direction through hole on urceolus and core pipe, can allow casing pressure and tubing pressure be applied on valve pipe.When casing pressure acts on axial force on valve pipe step and is greater than tubing pressure and spring action in the axial force of valve tube end, valve pipe and ball seat are separated, and form circulation canal.When tubing pressure and spring action are when the axial force of valve tube end is greater than casing pressure and acts on the axial force on valve pipe step, axial power back into ball seat place by valve pipe, close circulation canal, its feature is exactly that tubing pressure is higher, and the sealing performance between valve pipe and ball seat is better.The present invention can meet repeatedly the requirement of switch circulation, is a kind of safe and reliable novel product.
Of the present invention can assembling as follows:
First O shape circle is installed in corresponding seal groove, core pipe 2 and the first joint 1 are threaded connection and are integrated, then the first joint 1 is threaded connection with urceolus 3, spring 4 is enclosed within to the outside of core pipe 2, valve pipe 5 is encased in urceolus 3, ball seat 6 and the second joint 7 are connected as one, again the second joint 7 is connected valve pipe 5 is stretched in annular space 8 with its urceolus 3, after screw thread between the first joint 1 and the second joint 7 and urceolus 3 is tightened, finally also on the first joint 1 and the second joint 7, stamp 4 M10 hold-down screws respectively, further that the first joint 1 and the second joint 7 is fixing with urceolus 3 respectively, assembled.
The simple and convenient easy operation of this Product Assembly, utilize the elastic force of spring-compressed, under free state, valve pipe is tightly pushed away with ball seat and is sealed and matched, the variation by casing pressure and oil pipe internal pressure realizes the conducting and the sealing that deciliter realize circulation canal between valve pipe and ball seat.
Above embodiment is only exemplary embodiment of the present invention, is not used in restriction the present invention, and protection scope of the present invention is defined by the claims.Those skilled in the art can make various modifications or be equal to replacement the present invention in essence of the present invention and protection domain, this modification or be equal to replacement and also should be considered as dropping in protection scope of the present invention.
Claims (9)
- One kind can switching regulator reverse circulation valve, it is characterized in that, comprise: the first joint, core pipe, urceolus, spring, valve pipe, ball seat and the second joint, wherein the two ends of urceolus are fixedly connected with the second joint with the first joint respectively, and described the first joint and the second joint stretch into respectively in described urceolus, in described urceolus, from the first joint to the second joint direction, be followed successively by core pipe, valve pipe and ball seat, described ball seat is fixedly connected with described the second joint, one end of described core pipe is inserted in the first joint and is fixedly connected with the first joint, between described core pipe and urceolus, form annular space, described valve pipe has two sections that external diameter does not wait, one section that the external diameter of described valve pipe is larger is positioned at described annular space, between the external diameter of described valve pipe larger a section and urceolus and core pipe, slipper seal is connected, described spring housing is in the outside of core pipe, and the two ends of spring act on respectively described the first joint and described valve pipe, on described core pipe, radially offer pressure transmission hole, described pressure transmission hole is communicated with the annular space between core pipe inside and core pipe and urceolus, the end of described ball seat forms Internal Spherical Surface, the end of less one section of the external diameter of described valve pipe has the spherical outside surface matching with the Internal Spherical Surface of described ball seat, on described urceolus, have radial direction through hole, described radial direction through hole is corresponding to less one section of the external diameter of described valve pipe, between described the first joint and urceolus and between ball seat and the second joint, pass through seal with O ring.
- 2. according to claim 1 can switching regulator reverse circulation valve, it is characterized in that, the two ends of described urceolus are connected with the second joint screw thread with the first joint respectively.
- 3. according to claim 1 can switching regulator reverse circulation valve, it is characterized in that, described urceolus and the first joint and the second joint are fixed by hold-down screw.
- 4. according to claim 1 can switching regulator reverse circulation valve, it is characterized in that, between described core pipe and described the first joint, be tightly connected.
- 5. according to claim 1 can switching regulator reverse circulation valve, it is characterized in that, described pressure transmission hole is opened in core pipe near the first joint one side.
- 6. according to claim 1 can switching regulator reverse circulation valve, it is characterized in that, described the first joint is for having internal thread female joint, the second joint is for having external screw thread male joint.
- 7. according to claim 1 can switching regulator reverse circulation valve, it is characterized in that, on the outside wall surface of described the first joint and internal face, have annular seal groove, in annular seal groove, be provided for respectively the O shape circle sealing between the first joint and urceolus and core pipe.
- 8. according to claim 1 can switching regulator reverse circulation valve, it is characterized in that, in the outside wall surface of described ball seat, have annular seal groove, in described annular seal groove, be provided for the O shape circle sealing between the second joint and ball seat.
- 9. according to claim 1 can switching regulator reverse circulation valve, it is characterized in that, on the outside wall surface of described valve pipe and internal face, have annular seal groove, O shape circle is set in described annular seal groove, described valve pipe is by O shape circle and described urceolus and the described core seal of tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310464323.1A CN103541686A (en) | 2013-10-08 | 2013-10-08 | Switchable reverse circulation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310464323.1A CN103541686A (en) | 2013-10-08 | 2013-10-08 | Switchable reverse circulation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103541686A true CN103541686A (en) | 2014-01-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310464323.1A Pending CN103541686A (en) | 2013-10-08 | 2013-10-08 | Switchable reverse circulation valve |
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| Country | Link |
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| CN (1) | CN103541686A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196491A (en) * | 2014-08-20 | 2014-12-10 | 何富全 | Oil-water well hydraulic power assisted oil sleeve technological communication device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5484022A (en) * | 1991-08-08 | 1996-01-16 | Exploration & Production Services (North Sea) Ltd. | Tubing test valve |
| CN2471927Y (en) * | 2001-03-28 | 2002-01-16 | 李华林 | Oil production device for sand washover and without killing well |
| CN201265391Y (en) * | 2008-09-18 | 2009-07-01 | 吐哈石油勘探开发指挥部工程技术研究院 | High-pressure difference large-aperture gas-tight back-flushing valve for oil-gas field |
| CN202249949U (en) * | 2011-10-13 | 2012-05-30 | 中国石油集团西部钻探工程有限公司 | External-pressure opening type reverse circulation valve |
| CN203081400U (en) * | 2013-01-23 | 2013-07-24 | 中国石油化工股份有限公司江苏油田分公司 | Double-seal flowback preventing check valve |
-
2013
- 2013-10-08 CN CN201310464323.1A patent/CN103541686A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5484022A (en) * | 1991-08-08 | 1996-01-16 | Exploration & Production Services (North Sea) Ltd. | Tubing test valve |
| CN2471927Y (en) * | 2001-03-28 | 2002-01-16 | 李华林 | Oil production device for sand washover and without killing well |
| CN201265391Y (en) * | 2008-09-18 | 2009-07-01 | 吐哈石油勘探开发指挥部工程技术研究院 | High-pressure difference large-aperture gas-tight back-flushing valve for oil-gas field |
| CN202249949U (en) * | 2011-10-13 | 2012-05-30 | 中国石油集团西部钻探工程有限公司 | External-pressure opening type reverse circulation valve |
| CN203081400U (en) * | 2013-01-23 | 2013-07-24 | 中国石油化工股份有限公司江苏油田分公司 | Double-seal flowback preventing check valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104196491A (en) * | 2014-08-20 | 2014-12-10 | 何富全 | Oil-water well hydraulic power assisted oil sleeve technological communication device |
| CN104196491B (en) * | 2014-08-20 | 2016-07-06 | 何富全 | Oil water well hydraulic power-assisted oil jacket technique intercommunicating device |
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Application publication date: 20140129 |