CN102418496A - Self-balanced underground full-bore check valve - Google Patents
Self-balanced underground full-bore check valve Download PDFInfo
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- CN102418496A CN102418496A CN2011102366057A CN201110236605A CN102418496A CN 102418496 A CN102418496 A CN 102418496A CN 2011102366057 A CN2011102366057 A CN 2011102366057A CN 201110236605 A CN201110236605 A CN 201110236605A CN 102418496 A CN102418496 A CN 102418496A
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Abstract
The invention provides a self-balanced underground full-bore check valve which comprises a first connector (10), a second connector (20), a switch valve (30) and a sliding sleeve (40), wherein the switch valve (30) comprises a valve seat (31) and a valve sheet (32); a first seal cavity (211) communicated with a space in a pipe and a second seal cavity (212) communicated with a space outside the pipe are respectively defined by the sliding sleeve (40) together with the first connector (10), the second connector (20) and the switch valve (30); and the valve sheet (32) is provided with a first working state of closing a valve port when the external pressure of an operating pipe column is greater than the internal pressure of the operating pipe column and a second working state of opening the valve port when the internal pressure of the operating pipe column is greater than or equal to the external pressure of the operating pipe column. The self-balanced underground full-bore check valve provided by the invention can be automatically opened or closed in time according to the real-time change of the internal and external pressure difference of the pipe column, thereby preventing blowout accidents from happening, improving the production safety, shortening the operation time and lowering the operation cost.
Description
Technical field
The present invention relates to formation testing of oil gas field completion and underground work field, especially, relate to a kind of from all-pass footpath, the formula down-hole ball-and-seat that weighs.
Background technology
At present both at home and abroad in completion formation testing and underground work construction, usually run into because of strata pressure makes the phenomenon of the existing overflow of scurrying out on the liquid in the tubing string greater than the tubing string internal pressure, severe patient can cause blowout; The tubing string external and internal pressure is uneven to have an accident owing to swabbing action also possibly cause when carrying tubing string in addition, or the like these situation safety of seriously jeopardizing the down-hole construction operation.At present, kill-job commonly used and closing well are avoided this accident.
Yet, adopt closing well, kill-job to eliminate the well control risk and have many drawbacks: the one, can not know in time that borehole pressure changes, and causes having little time closing well; The 2nd, the kill-job meeting causes oil layer pollution; The 3rd, closing well, kill-job have prolonged the construction operation time, have reduced operating efficiency, have increased operating cost.
Summary of the invention
It is a kind of from the formula down-hole all-pass footpath ball-and-seat that weighs that the object of the invention is to provide, can be according to the real-time change of tubing string inside and outside differential pressure and timely switch voluntarily, prevent the generation of gas blowout accident; Improved production security; Shorten the activity duration, improved operating efficiency greatly, reduced operating cost.
For realizing above-mentioned purpose, according to an aspect of the present invention, provide a kind of from all-pass footpath, the formula down-hole ball-and-seat that weighs, it is characterized in that comprise: first joint has the oil circuit latus rectum; Second joint has the oil circuit latus rectum, and first end is fixedly connected with first joint, forms container cavity, and the second end inwall is provided with first location structure, second joint on the inwall between first location structure and first joint, also include annular internal projection; Switch valve; With first joint and the coaxial setting of second joint, and be positioned at container cavity, comprise valve seat with oil circuit latus rectum and the valve block that is arranged on the port of export of valve seat; Valve seat is fixedly connected with first joint, and the outer wall that is positioned at annular internal projection top of valve seat is provided with second location structure; Sliding sleeve is arranged in the annular chamber of second joint and switch valve formation, and sliding sleeve in axial direction slides between first location structure and second location structure, and is connected with the valve block driving, and sliding sleeve is provided with flange near first end of first joint; Sliding sleeve surrounds respectively with first joint, second joint and switch valve and manages first seal chamber that interior space communicates, and second seal chamber that communicates with the pipe external space; Valve block has in first duty of external pressure close port during greater than interior press and in interior pressure opens second duty of valve port during more than or equal to external pressure.
Further; Offer interior communication passage on the ring wall of the switch valve between first location structure and second location structure; Offer the extension passage on the ring wall of communication passage in the sliding sleeve correspondence, interior communication passage cooperates with the extension passage, the space and first seal chamber in common communicating pipe; Offer outer communication passage on the ring wall of second joint between the bottom surface of second location structure and first joint, outer communication passage is communicated with second seal chamber and the pipe external space.
Further, valve block is arranged on the exit of valve seat rotationally through the rotating shaft that is arranged on valve seat one side, and valve block comprises the valve block main body that is positioned at rotating shaft first side, and the cam that is positioned at rotating shaft second side; The position of the corresponding cam of sliding sleeve is provided with the adjusting opening, and cam stretches into to be regulated in the opening, according to the state of the position adjustments valve block main body of regulating opening.
Further, be set with a pair of lug on the end face of the port of export one lateral edges of valve seat, rotating shaft is arranged on the lug rotationally.
Further, regulating opening and comprise upper edge and lower edge, fits with the upper side of cam when valve block sealing valve port in the upper edge, and the lower edge is when valve block is opened fully and the applying of the downside of cam.
Further; The axial length of interior communication passage is the stroke that endwisely slips of sliding sleeve; The upper edge of extending passage flushes with the upper edge of communication passage when sliding sleeve is positioned at the limes superiors position, and the lower edge of extending passage flushes with the lower edge of communication passage when sliding sleeve is positioned at the limit inferior position.
Further, sliding sleeve is divided into upper sliding sleeve and low sleeve in regulating opening part along circumferential direction, and upper sliding sleeve is fixedly connected with low sleeve.
Further, second joint comprises upper end and the bottom that is fixed together, and the upper end comprises annular internal projection, and the bottom comprises first location structure.
Further, valve block is the butterfly valve block that is removably disposed in the rotating shaft.
Further, the exit end face of valve seat is provided with soft metal layer or mild alloy layer.
The present invention has following beneficial effect:
1. sliding sleeve surrounds respectively with first joint, second joint and one way valve and manages first seal chamber that interior space communicates; And second seal chamber that communicates with the pipe external space; Sliding sleeve and valve block drive and are connected, and first duty of close port is perhaps opened second duty of valve port during more than or equal to external pressure when making valve block be in external pressure greater than interior the pressure in interior pressure.Owing to through the tubing string inside and outside differential pressure switching of ball-and-seat is controlled, ball-and-seat can be according to the real-time change of inside and outside differential pressure and timely switch voluntarily, has improved production security, has shortened the activity duration, has improved operating efficiency.
2. regulating opening and comprise upper edge and lower edge, fits with the cam upper side when valve block sealing valve port in the upper edge, and the lower edge is when valve block is opened fully and the applying of the downside of cam.Because regulating the last lower edge of opening is that face contacts with the side up and down of cam respectively, makes valve block to open fully or to close, and has guaranteed the duty of valve block.
3. valve block is the butterfly valve block that is removably disposed in the rotating shaft, when valve block damages or lost efficacy, can in time change valve block on the one hand, and on the other hand, butterfly valve block adjusting function is good, can bear higher pressure.
Except top described purpose, feature and advantage, the present invention also has other purpose, feature and advantage.To do further detailed explanation to the present invention with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation when the formula down-hole all-pass footpath ball-and-seat that weighs is in closed condition according to an embodiment of the invention;
Fig. 2 is the structural representation when the formula down-hole all-pass footpath ball-and-seat that weighs is in open mode according to an embodiment of the invention;
Fig. 3 is the structure for amplifying sketch map according to the L place of Fig. 1;
Fig. 4 is that A-A according to Fig. 1 is to the sectional structure sketch map; And
Fig. 5 is the structure for amplifying sketch map according to the R place of Fig. 4.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
As depicted in figs. 1 and 2, according to embodiments of the invention, the formula that weighs certainly down-hole all-pass footpath ball-and-seat comprises that first end of first joint 10 and second joint, 20, the first joints 10 and second joint 20 is fixedly connected, and this fixed connection mode for example is welding.Be formed with container cavity 21 in second joint 20, be provided with switch valve 30 in the container cavity 21.Be provided with sliding sleeve 40 in switch valve 30 and second joint, the 20 formed annular housings, sliding sleeve 40 is set on the switch valve 30, and can slide along the axial direction of switch valve 30.
Ball-and-seat is installed on the pipeline of working string; In case the tubing string external pressure occurs unusual; Cause the tubing string external pressure greater than the tubing string internal pressure; Then ball-and-seat can be closed the valve port of switch valve 30 owing to the effect of pipe external and internal pressure, prevents because of the variation of borehole pressure security incidents such as overflow or blowout to take place, and guarantees the safety of completion formation testing and underground work construction.In case it is normal that the tubing string external and internal pressure recovers, then the switch valve in the ball-and-seat is in time opened valve port owing to the variation of external and internal pressure, and formation testing and underground work are proceeded.
In conjunction with referring to Fig. 1, first joint, 10 first ends have the step installing hole, and wherein the endoporus in big footpath is used for being connected with working string, and the endoporus internal diameter of path is identical with the internal diameter of working string, is convenient to the transmission of fluid etc.Second end of first joint 10 has the structure that matches with second joint 20 and switch valve 30.Second joint 20 is connected on the outside step of first joint, 10 second ends, and the inner wall sleeve of second joint 20 is located on the step outer wall of first joint 10, forms respectively axially and location structure radially.Switch valve 30 is connected on the inner side step of first joint 10, and the inwall of the inner side step of the outer wall of switch valve 30 and first joint 10 fits.
First end of the bottom 26 of second joint 20 is fixedly connected with second end of upper end 25; The second end bottom of bottom 26 is provided with first location structure 22; First location structure, 22 outstanding being arranged on the sliding path of sliding sleeve 40 are to confirm the extreme lower position of sliding sleeve 40 to lower slider.The internal diameter of first location structure 22 is greater than the internal diameter of sliding sleeve 40, and the below is provided with the oil circuit latus rectum that is communicated with working string.The second end end of bottom 26 is provided with outside jointing, is convenient to be connected with the oil circuit tubing string.
In another embodiment; Second joint 20 also can be a monolithic construction; Be that upper end 25 processes for one with bottom 26; The positioning step that wherein limits the movement position of sliding sleeve 40 is positioned at the bottom of second joint 20, and annular internal projection 23 is positioned on the inwall of second joint 20 of positioning step top, and outer communication passage 24 is arranged on the outer wall of second joint 20 of annular internal projection 23 tops.
In conjunction with referring to Fig. 3, Fig. 4 and Fig. 5, switch valve 30 and first joint 10 and the 20 coaxial settings of second joint comprise valve seat 31 and valve block 32 with oil circuit latus rectum.Valve block 32 is arranged on second end (the being the port of export) port position of valve seat 31, and has two kinds of duties of the valve port of opening or closing valve seat 31.
First end of valve seat 31 is fixedly connected with first joint 10, and the oil circuit latus rectum on it docks with the oil circuit latus rectum of first joint 10.The outer wall on valve seat 31 tops is provided with second location structure 311.Second location structure 311 is arranged on communication passage 24 belows, is used to limit the extreme higher position that sliding sleeve 40 moves upward.Second location structure 311 is for annular outer plays structure, and and the inwall of second joint 20 between have the gap, guarantee that the annular space of second location structure, 311 both sides is interconnected.The barrel of the valve seat 31 of second location structure, 311 belows is provided with interior communication passage 33.Interior communication passage 33 runs through the barrel of valve seat 31, and the inner space of valve seat 31 is communicated with container cavity 21.
The end face of the second end end, one side of valve seat 31 is provided with a pair of lug 312.Lug 312 is positioned at the end face edge of the end construction of valve seat 31, and stretches out along the axial direction of valve seat 31.Be relatively set with shaft hole on the sustained height of two lugs 312, rotating shaft 34 is arranged on the lug 312 rotationally.The end face arranged outside that lug 312 is set on valve seat 31 has recess, and the inner space of this recess and valve seat 31 is isolated.The end face of all sides of the second end internal oil passages latus rectum of valve seat 31 flushes end face and is provided with soft metal or mild alloy coating.Soft metal or mild alloy coating can guarantee that not only coating can bear higher external pressure; Improve the practicality of valve seat 31; And, can be partially submerged in soft metal or the mild alloy coating because the material behavior of soft metal and mild alloy makes valve block 32 when the sealing valve port; It is tightr to make valve block 32 and valve seat 31 fit, and has guaranteed the sealing performance of ball-and-seat.
The edge of valve block 32 is provided with shaft hole, and the shaft hole two ends have and cooperate with lug 312 and be fastened on two structures between the lug 312.Valve block 32 is arranged between the lug 312, and through rotating shaft 34 valve block 32 and valve seat 31 is linked together.Valve block 32 is arranged on the port position of valve seat 31 rotationally, and has dismountable syndeton.Valve block 32 perhaps receives owing to year is of a specified duration and impacts excessive the damage when perhaps losing efficacy, and dismountable structure can in time be changed the staff to valve block 32, and does not influence the use of other parts of ball-and-seat, can effectively practice thrift cost.
Valve block 32 is that the boundary is divided into two parts with the central axis of shaft hole, is positioned at the valve block main body 321 and the cam 322 that is positioned at central axis second side of central axis first side.The upper surface of valve block main body 321 for the plane that end face structure fits that flushes of second end of valve seat 31, soffit is the curved surfaces structure.The curved surfaces structure of soffit and the inner wall surface of sliding sleeve 40 adapt; Make valve block main body 321 when opening fully; Soffit can fit with the inner wall surface of sliding sleeve 40, increases the lifting surface area of valve block main body 321, reduces the force intensity that receives of valve block main body 321.
The both sides of cam 322 are installed in the lug 312, and are fixedly connected through rotating shaft 34.Cam 322 makes and forms blunt shape bending angle between cam 322 and the valve block main body 321 along the oblique bending down of the radial direction of valve block main body 321.The head of cam 322 is the arc transition structure.Cam 322 can rotate in the recess of the end face outside of valve seat 31, sliding sleeve 40 can be rotated through control cam 322 regulate opening or closed condition of valve port.
Sliding sleeve 40 is arranged in the annular space between first location structure 22 of second location structure 311 and second joint 20 of valve seat 31, and the outer wall of inwall and opening valve 30 fits.Sliding sleeve 40 comprises the upper sliding sleeve 44 and low sleeve 45 two parts of fixed connection, and the link position place of upper sliding sleeve 44 and low sleeve 45 includes and regulates opening 43, and cam 322 is arranged on to be regulated in the opening 43.Regulate opening 43 and comprise upper edge 431 and lower edge 432, upper sliding sleeve 44 and low sleeve 45 are the boundary with the upper edge 431 of adjusting opening 43 and the circumferential plane between the lower edge 432, are divided into two parts.
The first end end position of the upper sliding sleeve 44 of sliding sleeve 40 includes flange 41, and the inwall of the upper end 25 of the outer wall of flange 41 and second joint 20 fits, and the upper surface of flange 41 can upwards slide into the soffit of second location structure 311 of applying valve seat 31.It is isolated with the interior space of pipe that the flange 41 of sliding sleeve 40, the upper end of second joint 20 25, first joint 10 and valve seat 31 surround second seal chamber, 212, the second seal chambers 212, and be communicated with the pipe external space through outer communication passage 24.
The bottom of upper sliding sleeve 44 comprises upper edge 431, upper edge 431 when valve block 32 is closed fully with the upper side applying of cam 322, make valve block 32 have good position location, and can make valve block 32 seal valve port better through the pressure of sliding sleeve 40.Surface contact structure can provide under the situation of enough pressure upper edge 431 for valve block 32, reduces valve block 32 because unbalance stress produces the possibility of distortion, improves the durability of valve block 32.
The flange 41 of upper sliding sleeve 44, barrel cooperate with barrel, the interior annular protrusion 23 of second joint 20, form first seal chamber 211.First seal chamber 211 is isolated with the pipe external space.The barrel of corresponding interior communication passage 33 is provided with and extends passage 42 on the upper sliding sleeve 44.Extend the barrel that passage 42 runs through upper sliding sleeve 44, and communicate with interior communication passage 33, the space is communicated with first seal chamber 211 in will managing.The opening length of the axial direction of interior communication passage 33 equals the endwisely slip stroke of sliding sleeve 40 in annular space; The upper edge of extending passage 42 flushes with the upper edge of communication passage 33 when sliding sleeve is positioned at the position location that moves upward; The lower edge of extending passage 42 flushes with the lower edge of communication passage 33 when sliding sleeve 40 is positioned at the limit inferior position, and it is effective in the sliding stroke of sliding sleeve 40 all the time to guarantee to extend passage 42.
Fixed connection mode between low sleeve 45 and the upper sliding sleeve 44 can be connected or welding etc. for bolt.Valve block can be butterfly valve sheet or ligulate valve block etc.In the present embodiment, valve block is the butterfly valve block.
In another embodiment, sliding sleeve 40 also can be integral structure, is connected through hinge between the lower end of sliding sleeve 40 and the cam 322, and is provided with the slip elongated slot in the cam 322, and hinge can slide in cam 322.Through the upper-lower position and the position of hinge in the slip elongated slot of cam 322 of control sliding sleeve 40, can control the valve port that valve seat 31 was opened or closed to valve block 32, realize control function automatically.
In another embodiment, valve block 32 also can be set directly at the end position of valve seat 31, and does not need to increase lug 312 in the end of valve seat 31.This set mode need be transformed the syndeton of valve seat 31; And the surface structure of valve block 32 is carried out corresponding transformation according to the port shape of valve seat 31; To guarantee that valve block 32 can arrive limes superiors position (being the position location, top) time at sliding sleeve 40 and open complete closed when sliding sleeve 40 reaches limit inferior position (being the position location, bottom) fully.
Can be arranged on any position of working string according to the ball-and-seat of present embodiment, and can on working string, be provided with a plurality of, good airproof performance, simple in structure.
When ball-and-seat is assembled; At first valve seat 31 is fixedly connected with first joint 10; Upper sliding sleeve 44 with sliding sleeve 40 is installed in outside the valve seat 31 then; Afterwards valve block 32 is installed in lug 312 places of valve seat 31 ends, with rotating shaft 34 valve block 32 and valve seat 31 is linked together, and make cam 322 be positioned at adjusting opening 43 places on the upper sliding sleeve 44.Afterwards low sleeve 45 is alignd with upper sliding sleeve 44, and upper sliding sleeve 44 and low sleeve 45 are linked together through bolt.The upper end 25 of second joint 20 is set in outside the sliding sleeve 40, and is fixedly connected, alignd with upper end 25 in the bottom 26 of second joint 20 at last, and connect, accomplish the assembling of ball-and-seat through bolt with first joint 10.Afterwards the ball-and-seat that assembles is installed on the working string.
When carrying out oil gas well completion formation testing or underground work,, then can around tubing string, produce high-pressure slurry etc. in case the generation of pipe external space pressure is unusual, and sharply raises.High-pressure slurry gets in second seal chamber 212 from outer communication passage 24.Owing to manage external space pressure greater than space pressure in the pipe, high-pressure slurry orders about the inner tubal wall of sliding sleeve 40 edges second joint 20 to lower slider, the interior space of entering pipe, communication passage 33 back in the mud in first seal chamber 211 is then flowed through from extension passage 42.In the sliding process of sliding sleeve 40, the upper edge 431 of the adjusting opening 43 of sliding sleeve 40 touches the upper surface of the cam 322 of valve block 32, and to lower compression cam 322, thereby valve block 32 34 is rotated around the shaft, valve block main body 321 rises gradually, and blocks valve port gradually.
When sliding sleeve 40 moves downward first location structure, 22 places; Sliding sleeve 40 stops to move downward, and the upper edge 431 of regulating opening 43 this moment fits the port of export end face applying of the upper surface of valve block main body 321 and valve seat 31 with the upper surface of the cam 322 of valve block 32; The valve port sealing; High-pressure slurry can't overflow outside pipe through space in managing, thereby has avoided the generation of security incidents such as overflow or blowout, has improved the safety of producing.
After operating personnel handled pipe external space pressure anomaly, make pipe external space pressure reply normally, space pressure began greater than pipe external space pressure in the pipe.The interior space of pipe this moment mud etc. gets in first seal chamber 211 after interior communication passage 33 is flowed through extension passage 42, and the high-pressure slurry in first seal chamber 211 etc. orders about sliding sleeve 40 to begin to move upward.In the sliding process of sliding sleeve 40; The lower edge 432 of the adjusting opening 43 of sliding sleeve 40 touches the soffit of the cam 322 of valve block 32, and upwards oppresses cam 322, thereby valve block 32 34 is rotated around the shaft; Valve block main body 321 is fallen gradually, and begins to open valve port gradually.Since high-pressure slurry constantly in manage the space get in first seal chamber 211, so sliding sleeve 40 constantly moves upward under the effect of high-pressure slurry, drives valve block 32 and constantly opens valve port.
When sliding sleeve 40 moved upward to second location structure, 311 places, because the barrier effect of second location structure 311, sliding sleeve 40 stopped to move upward.The lower edge 432 of regulating opening 43 this moment fits with the soffit of the cam 322 of valve block 32; The interior wall construction of the soffit of valve block main body 321 and sliding sleeve 40 fits; Valve port is opened fully; High-pressure slurry is carried to the pipe external space from managing interior space, thereby guarantees proceeding of oil gas well completion formation testing or underground work.
From above description, can find out; According to embodiments of the invention; Sliding sleeve surrounds respectively with first joint, second joint and one way valve and manages first seal chamber that interior space communicates; And with second seal chamber that communicates of the pipe external space, sliding sleeve drives with valve block and is connected, first duty of close port is perhaps opened second duty of valve port during more than or equal to external pressure when making valve block be in external pressure greater than interior pressure in interior pressure.Owing to through the tubing string inside and outside differential pressure switching of ball-and-seat is controlled, ball-and-seat can be according to the real-time change of inside and outside differential pressure and timely switch voluntarily, has improved production security, has shortened the activity duration, has improved operating efficiency.Regulating opening and comprise upper edge and lower edge, fits with the cam upper side when valve block sealing valve port in the upper edge, and the lower edge is when valve block is opened fully and the applying of the downside of cam.Because regulating the last lower edge of opening is that face contacts with the side up and down of cam respectively, makes valve block to open fully or to close, and has guaranteed the duty of valve block.Valve block is the butterfly valve block that is removably disposed in the rotating shaft, when valve block damages or lost efficacy, can in time change valve block on the one hand, and on the other hand, butterfly valve block adjusting function is good, can bear higher pressure.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. all-pass footpath, the formula down-hole ball-and-seat that weighs certainly is characterized in that, comprising:
First joint (10) has the oil circuit latus rectum;
Second joint (20); Has said oil circuit latus rectum; First end of said second joint (20) is fixedly connected with said first joint (10); Form container cavity (21), the second end inwall of said second joint (20) is provided with first location structure (22), and being positioned on the inwall between said first location structure (22) and said first joint (10) of said second joint (20) also includes annular internal projection (23);
Switch valve (30); With said first joint (10) and the coaxial setting of said second joint (20); And be positioned at said container cavity (21); Comprise the valve block (32) of valve seat (31) with said oil circuit latus rectum and the port of export that is arranged on said valve seat (31), said valve seat (31) is fixedly connected with said first joint (10), and the outer wall that is positioned at said annular internal projection (23) top of said valve seat (31) is provided with second location structure (311);
Sliding sleeve (40); Be arranged in the annular chamber of said second joint (20) and said switch valve (30) formation; Said sliding sleeve (40) in axial direction slides between said first location structure (22) and said second location structure (311); And drive with said valve block (32) and to be connected, said sliding sleeve (40) is provided with flange (41) near first end of said first joint (10);
Said sliding sleeve (40) surrounds respectively with said first joint (10), said second joint (20) and said switch valve (30) and manages first seal chamber (211) that interior space communicates, and second seal chamber (212) that communicates with the pipe external space;
Said valve block (32) has in first duty of external pressure close port during greater than interior press and in interior pressure opens second duty of valve port during more than or equal to external pressure.
2. all-pass footpath, the formula down-hole ball-and-seat that weighs certainly according to claim 1 is characterized in that,
Offer interior communication passage (33) on the ring wall of the said switch valve (30) between said first location structure (22) and said second location structure (311); Offer on the ring wall of communication passage (33) in said sliding sleeve (40) is corresponding said and extend passage (42); Communication passage (33) cooperates with said extension passage (42) in said, is communicated with space and said first seal chamber (211) in the said pipe jointly;
Offer outer communication passage (24) on the ring wall of second joint (20) between the bottom surface of said second location structure (311) and said first joint (10), said outer communication passage (24) is communicated with said second seal chamber (212) and the said pipe external space.
3. all-pass footpath, the formula down-hole ball-and-seat that weighs certainly according to claim 2 is characterized in that,
Said valve block (32) is arranged on the exit of said valve seat (31) rotationally through the rotating shaft (34) that is arranged on said valve seat (31) one sides; Said valve block (32) comprises the valve block main body (321) that is positioned at said rotating shaft (34) first sides, and the cam (322) that is positioned at said rotating shaft (34) second sides;
The position of the corresponding said cam of said sliding sleeve (40) (322) is provided with regulates opening (43), and said cam (322) stretches in the said adjusting opening (43), according to the state of the said valve block main body of the position adjustments of said adjusting opening (43) (321).
4. according to claim 3 from all-pass footpath, the formula down-hole ball-and-seat that weighs, it is characterized in that be set with a pair of lug (312) on the end face of the port of export one lateral edges of said valve seat (31), said rotating shaft (34) is arranged on the said lug (312) rotationally.
5. according to claim 3 from all-pass footpath, the formula down-hole ball-and-seat that weighs; It is characterized in that; Said adjusting opening (43) comprises upper edge (431) and lower edge (432); Fit with the upper side of said cam (322) when the said valve port of said valve block (32) sealing in said upper edge (431), said lower edge (432) are at said valve block (32) when opening fully and the applying of the downside of said cam (322).
6. according to claim 2 from all-pass footpath, the formula down-hole ball-and-seat that weighs; It is characterized in that; The axial length of communication passage (33) is the stroke that endwisely slips of said sliding sleeve (40) in said; The upper edge of said extension passage (42) flushes with the upper edge of said communication passage (33) when said sliding sleeve is positioned at the limes superiors position, and the lower edge of said extension passage (42) flushes with the lower edge of said communication passage (33) when said sliding sleeve (40) is positioned at the limit inferior position.
7. according to each described all-pass footpath, formula down-hole ball-and-seat that weighs certainly in the claim 3 to 5; It is characterized in that; Said sliding sleeve (40) is located to be divided into upper sliding sleeve (44) and low sleeve (45) along circumferential direction in said adjusting opening (43), and said upper sliding sleeve (44) is fixedly connected with said low sleeve (45).
8. according to each described all-pass footpath, formula down-hole ball-and-seat that weighs certainly in the claim 1 to 6; It is characterized in that; Said second joint (20) comprises upper end (25) and bottom (26) that are fixed together; Said upper end (25) comprises said annular internal projection (23), and said bottom (26) comprise said first location structure (22).
9. according to each described all-pass footpath, formula down-hole ball-and-seat that weighs certainly in the claim 1 to 6, it is characterized in that said valve block (32) is for being removably disposed in the butterfly valve block in the rotating shaft (34).
10. according to each described all-pass footpath, formula down-hole ball-and-seat that weighs certainly in the claim 1 to 6, it is characterized in that the exit end face of said valve seat (31) is provided with soft metal layer or mild alloy layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110236605.7A CN102418496B (en) | 2011-08-17 | 2011-08-17 | Self-balanced underground full-bore check valve |
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| CN201110236605.7A CN102418496B (en) | 2011-08-17 | 2011-08-17 | Self-balanced underground full-bore check valve |
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| CN102418496A true CN102418496A (en) | 2012-04-18 |
| CN102418496B CN102418496B (en) | 2014-01-22 |
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| CN201110236605.7A Expired - Fee Related CN102418496B (en) | 2011-08-17 | 2011-08-17 | Self-balanced underground full-bore check valve |
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| CN105164365A (en) * | 2013-09-20 | 2015-12-16 | 弗洛泊威尔技术公司 | System and method for controlling flow in a pipe using a finger valve |
| CN106223899A (en) * | 2016-09-21 | 2016-12-14 | 库尔勒施得石油技术服务有限公司 | The method that single current bypass valve and use single current bypass valve carry out kill-job |
| CN107339080A (en) * | 2017-09-06 | 2017-11-10 | 刘书豪 | The production method of fluid separation apparatus, hoistway structure and oil or natural gas |
| CN107503712A (en) * | 2017-09-06 | 2017-12-22 | 刘书豪 | The production method of fluid separation apparatus, hoistway structure and oil or natural gas |
| CN111434881A (en) * | 2019-01-15 | 2020-07-21 | 中国石油天然气股份有限公司 | Check valve |
| CN112253043A (en) * | 2020-12-09 | 2021-01-22 | 中国石油天然气集团有限公司 | High-pressure well cementing cement head |
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| CN105164365A (en) * | 2013-09-20 | 2015-12-16 | 弗洛泊威尔技术公司 | System and method for controlling flow in a pipe using a finger valve |
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| CN111434881A (en) * | 2019-01-15 | 2020-07-21 | 中国石油天然气股份有限公司 | Check valve |
| CN112253043A (en) * | 2020-12-09 | 2021-01-22 | 中国石油天然气集团有限公司 | High-pressure well cementing cement head |
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| CN102418496B (en) | 2014-01-22 |
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