CN103234067B - A kind of one-way valve for downhole tool - Google Patents
A kind of one-way valve for downhole tool Download PDFInfo
- Publication number
- CN103234067B CN103234067B CN201310172482.4A CN201310172482A CN103234067B CN 103234067 B CN103234067 B CN 103234067B CN 201310172482 A CN201310172482 A CN 201310172482A CN 103234067 B CN103234067 B CN 103234067B
- Authority
- CN
- China
- Prior art keywords
- spool
- guide holder
- valve body
- way valve
- downhole tool
- 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.)
- Active
Links
Landscapes
- Check Valves (AREA)
Abstract
The present invention relates to petroleum industry underground operation tool field, be specifically related to a kind of one-way valve for downhole tool, comprise spool, return spring, valve body urceolus, also comprise spool guide holder, described spool guide holder is fixedly installed in described valve body urceolus, and described spool guide holder is provided with opening, and described spool interts on described spool guide holder, and described spool and described spool guide holder are all axial arranged along described valve body urceolus; One end of described spool is provided with spring seat and return spring, and described return spring is set on described spool, and one end of described return spring contacts with described spring seat, and the other end of described return spring contacts with described spool guide holder; The other end of described spool is sealed end, and described sealed end is used for coordinating with described valve body urceolus or being separated to realize sealing and open.This one-way valve structures is simple and reliable, easy for installation, can close rapidly on spool prevention mud and return.
Description
Technical field
The present invention relates to petroleum industry underground operation tool field, be specifically related to a kind of one-way valve for downhole tool.
Background technique
Downhole tool is widely used in gaslift, well-flushing, acidifying, salvaging, well logging aspect at home and abroad, and drilling well, pressure break, seabed operation, deepened well and pipe laying work have been arrived in current development and application.But down-hole slurry pressure is high, situation and complexity thereof, be easy to occur down-hole slurry overpressure and the phenomenon of regurgitating from drill string.A check valve apparatus must be had in downhole tool for this reason, reflux to prevent mud.Current check valve apparatus structure both domestic and external is all the door type structure of rotary type, this structure uses the spring-back force of a torsion spring to control the closedown of one-way valve, when one-way valve top mud pressure is greater than bottom mud pressure, pressure difference overcomes spring torsion and opens spool, opens slurry channel; When one-way valve bottom mud pressure is greater than top mud pressure, recoil of spring power makes spool close, and closes slurry channel and prevents mud from backflowing.This one-way valve is owing to being rotational structure, and spool and valve core case would not be fine in the laminating of each sealing junction circumferential, have finedraw.Particularly one-way valve bottom mud pressure is excessive cause one-way valve to have a trickle rotation time, the one-way valve sealing effect of this structure can be affected, thus affects the sealing effect of mud.
Summary of the invention
The object of the invention is to for prior art Problems existing, a kind of one-way valve for downhole tool is provided.To achieve these goals, the technical solution used in the present invention is:
A kind of one-way valve for downhole tool, comprise spool, return spring, valve body urceolus, also comprise spool guide holder, described spool guide holder is fixedly installed in described valve body urceolus, and described spool guide holder is provided with opening, described spool interts on described spool guide holder, and described spool and described spool guide holder are all axial arranged along described valve body urceolus; One end of described spool is provided with spring seat and return spring, and described return spring is set on described spool, and one end of described return spring contacts with spring seat, and the other end of described return spring contacts with described spool guide holder; The other end of described spool is sealed end, and described sealed end is used for coordinating with described valve body urceolus or being separated to realize sealing and open.
As the preferred embodiment of the present invention, the side near described spool guide holder on described spring seat is provided with prolonged section.When described return spring is compressed to a certain degree, described prolonged section and described spool guide holder rigid contact, substitute described return spring stressed, prevent described return spring be overly compressed and lost efficacy.
As the preferred embodiment of the present invention, described valve body urceolus protrudes near the position of described sealed end and is provided with elastic seal seat; When first described sealed end contacts to realize seal action with described elastic seal seat when described valve body urceolus is close; When after described elastic seal seat compressive deformation, described sealed end directly contacts to realize seal action with described valve body urceolus.
As the preferred embodiment of the present invention, a side of described sealed end is cambered surface, and the another side of described sealed end is curved surface.
As the preferred embodiment of the present invention, also comprise the baffle plate for fixing described elastic seal seat.
As the preferred embodiment of the present invention, also comprise screw, described baffle plate is fixed on described valve body urceolus by described screw.
As the preferred embodiment of the present invention, described screw is sunk screw.
As the preferred embodiment of the present invention, also comprising a guide holder housing screw, being arranged on described valve body urceolus for compressing described spool guide holder.
As the preferred embodiment of the present invention, also comprise cap-type nut, by described cap-type nut, described spring seat is fixed on the end of described spool.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows: simple and reliable for structure, easy for installation, is soft sealing when pressure difference is less, be rigid seal when pressure is large, and spool can be closed when mud backflows rapidly stop on mud and return.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the phase diagram of mud normal circulation
Fig. 3 is that one-way valve prevents mud reflux state figure
Fig. 4 is the schematic diagram of prolonged section set on spring seat
Fig. 5 is spool guide holder three-dimensional structure diagram
Mark in figure: 1-cap-type nut, 2-spring seat, 3-spool, 4-return spring, 5-guide holder housing screw, 6-valve body urceolus, 7-spool guide holder, 8-elastic seal seat, 9-rubber base baffle plate, 10-screw, 11-sealed end, 12-prolonged section, 13-opening.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention will be further described.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
embodiment 1
During original state: as shown in Figure 1, sealed end (11) on spool (3) along the both sides of one-way valve axis without pressure difference, at this moment spool (3) is under the effect of return spring, spool (3) is made to have individual active force vertically, this power makes spool (3) and elastic seal seat (8) to combine closely compression, allows slurry channel be in closed condition.
During the flowing of mud normal circulation: as shown in Figure 2, spool (3) is pushed open by the resistance that the pressure of mud of sealed end (11) one side overcomes return spring (4), at this moment disengage between elastic seal seat (8) and spool (3), middle formation passage, mud flows through the passage of the opening (13) of spool guide holder (7) and formation between elastic seal seat (8) and spool (3).Opening (13) can be found out in Fig. 5 again.If pressure and the flow of side mud are larger, return spring (4) continues compression until the prolonged section (12) on spring seat (2) contacts with spool guide holder (7), at this moment spool (3) has just become rigid support from yielding support, like this would not excess compression return spring (4) and make spring failure, thus improve reliability of structure and Security.Fig. 4 illustrates the prolonged section (12) be arranged on spring seat (2).
When one-way valve prevents mud from refluxing: as shown in Figure 3, spool (3) is under the acting in conjunction of return spring (4) elastic force and mud pressure, sealed end (11) on spool (3) is pressed on elastic seal seat (8), passage press seal is lived, prevent mud from backflowing, if time mud pressure is large, mud pressure continues to promote spool (3) and moves up, elastic seal seat (8) is extruded sealed end (11) in distortion back valve core (3) and valve body urceolus (6) directly rigid contact compression, the cambered surface of the side of sealed end (13) can form larger area provides larger pressure to be pressed on valve body urceolus (6) by spool (3), form rigid seal, improve the Safety performance of sealing.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. the one-way valve for downhole tool, comprise spool (3), return spring (4), valve body urceolus (6), it is characterized in that, also comprise spool guide holder (7), described spool guide holder (7) is fixedly installed in described valve body urceolus (6), and described spool guide holder (7) is provided with opening (13), described spool (3) interts on described spool guide holder (7), and described spool (3) and described spool guide holder (7) are all axial arranged along described valve body urceolus (6);
Spring seat (2) and return spring (4) is provided with in one end of described spool (3), described return spring (4) is set on described spool (3), one end of described return spring (4) contacts with described spring seat (2), and the other end of described return spring (4) contacts with described spool guide holder (7);
The other end of described spool (3) is sealed end (11), and described sealed end (11) is for coordinating with described valve body urceolus (6) or being separated to realize sealing and opening.
2. the one-way valve for downhole tool according to claim 1, is characterized in that, the upper side near described spool guide holder (7) of described spring seat (2) is provided with prolonged section (12).
3. the one-way valve for downhole tool according to claim 1, is characterized in that, protrudes be provided with elastic seal seat (8) at the upper position near described sealed end (11) of described valve body urceolus (6);
First contact to realize seal action with described elastic seal seat (8) when described sealed end (11) is close to described valve body urceolus (6), when after described elastic seal seat (8) compressive deformation, described sealed end (11) directly contacts to realize seal action with described valve body urceolus (6).
4. the one-way valve for downhole tool according to claims 1 to 3 any one, is characterized in that, a side of described sealed end (11) is cambered surface, and the another side of described sealed end (11) is curved surface.
5. the one-way valve for downhole tool according to claim 3, is characterized in that, also comprises the baffle plate (9) for fixing described elastic seal seat (8).
6. the one-way valve for downhole tool according to claim 5, is characterized in that, also comprises screw (10), and described baffle plate (9) is fixed on described valve body urceolus (6) by described screw (10).
7. the one-way valve for downhole tool according to claim 6, is characterized in that, described screw (10) is sunk screw.
8. the one-way valve for downhole tool according to claims 1 to 3 any one, is characterized in that, also comprises a guide holder housing screw (5), is arranged on described valve body urceolus (6) for compressing described spool guide holder (7).
9. the one-way valve for downhole tool according to claims 1 to 3 any one, is characterized in that, also comprises cap-type nut (1), by described cap-type nut (1), described spring seat (2) is fixed on the end of described spool (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310172482.4A CN103234067B (en) | 2013-05-10 | 2013-05-10 | A kind of one-way valve for downhole tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310172482.4A CN103234067B (en) | 2013-05-10 | 2013-05-10 | A kind of one-way valve for downhole tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103234067A CN103234067A (en) | 2013-08-07 |
| CN103234067B true CN103234067B (en) | 2015-11-11 |
Family
ID=48882119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310172482.4A Active CN103234067B (en) | 2013-05-10 | 2013-05-10 | A kind of one-way valve for downhole tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103234067B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104314513B (en) * | 2014-08-15 | 2018-05-04 | 中国石油天然气股份有限公司 | Fishtail type float collar |
| NO340579B1 (en) * | 2015-05-13 | 2017-05-15 | Toolserv As | Back pressure valve for a completion string comprising sand screens |
| CN105135009A (en) * | 2015-09-30 | 2015-12-09 | 江苏神通阀门股份有限公司 | Nuclear-security-level lift check valve |
| CN108644400A (en) * | 2018-07-27 | 2018-10-12 | 四川宏华石油设备有限公司 | A kind of novel hydropower alternation switch valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1266306A (en) * | 1969-04-22 | 1972-03-08 | ||
| EP0255269A2 (en) * | 1986-07-30 | 1988-02-03 | Halliburton Company | Poppet valve |
| CN2211527Y (en) * | 1994-11-16 | 1995-11-01 | 于春湖 | Multifunctional one-way valve |
| CN201954059U (en) * | 2010-12-22 | 2011-08-31 | 南方泵业股份有限公司 | Check water drainer |
| CN202560165U (en) * | 2012-03-15 | 2012-11-28 | 中国石油化工股份有限公司 | Valve element reset system of down-hole check valve for oil and gas drilling |
| CN202790713U (en) * | 2012-09-08 | 2013-03-13 | 环球阀门集团有限公司 | Noise elimination check valve |
| CN203230890U (en) * | 2013-05-10 | 2013-10-09 | 四川宏华石油设备有限公司 | One-way valve for downhole tool |
-
2013
- 2013-05-10 CN CN201310172482.4A patent/CN103234067B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1266306A (en) * | 1969-04-22 | 1972-03-08 | ||
| EP0255269A2 (en) * | 1986-07-30 | 1988-02-03 | Halliburton Company | Poppet valve |
| CN2211527Y (en) * | 1994-11-16 | 1995-11-01 | 于春湖 | Multifunctional one-way valve |
| CN201954059U (en) * | 2010-12-22 | 2011-08-31 | 南方泵业股份有限公司 | Check water drainer |
| CN202560165U (en) * | 2012-03-15 | 2012-11-28 | 中国石油化工股份有限公司 | Valve element reset system of down-hole check valve for oil and gas drilling |
| CN202790713U (en) * | 2012-09-08 | 2013-03-13 | 环球阀门集团有限公司 | Noise elimination check valve |
| CN203230890U (en) * | 2013-05-10 | 2013-10-09 | 四川宏华石油设备有限公司 | One-way valve for downhole tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103234067A (en) | 2013-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103234067B (en) | A kind of one-way valve for downhole tool | |
| CN102817575B (en) | Downhole blow-out preventer with automatic controlling and anchoring function | |
| CN203230890U (en) | One-way valve for downhole tool | |
| CN104329073A (en) | Delay-to-open sliding sleeve | |
| CN203685115U (en) | Rubber tube protruding prevention ring for permanent packer | |
| CN202469088U (en) | Underground check valve for oil gas drilling | |
| CN203130118U (en) | Differential pressure combination valve | |
| CN112228001A (en) | Packer with low setting force and low unsetting force | |
| CN201306140Y (en) | Valve type float valve | |
| CN203847071U (en) | Downhole safety valve | |
| CN104653144A (en) | Compression packer for oil well large pressure difference washable well | |
| CN116557558B (en) | 175MPa sand control formula flatbed valve | |
| CN204082091U (en) | A kind of reducing sliding sleeve switch | |
| CN201068776Y (en) | Heavy pressure acidizing fracturing packer | |
| CN206539700U (en) | The stifled oily component of one kind | |
| CN104373055B (en) | A kind of drill rod connector | |
| CN204238870U (en) | A kind of drill rod connector | |
| CN104818956A (en) | Gate plate locking device of blowout preventer | |
| CN202946106U (en) | Grouting-free forcing type float collar | |
| CN203822246U (en) | Oil pipe blowout preventer for oil production system | |
| CN207131373U (en) | Board-like float valve | |
| CN110485963A (en) | A kind of shale gas well wellhead assembly based on Operating Pressure | |
| CN207486144U (en) | A kind of float valve core drilling tool check valves | |
| CN203515441U (en) | Special combined blowout preventer | |
| CN202867882U (en) | Nuclear security level bidirectional high-pressure sealing butterfly valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |