CN102418496B - Self-balanced underground full-bore check valve - Google Patents
Self-balanced underground full-bore check valve Download PDFInfo
- Publication number
- CN102418496B CN102418496B CN201110236605.7A CN201110236605A CN102418496B CN 102418496 B CN102418496 B CN 102418496B CN 201110236605 A CN201110236605 A CN 201110236605A CN 102418496 B CN102418496 B CN 102418496B
- Authority
- CN
- China
- Prior art keywords
- joint
- valve
- sliding sleeve
- seat
- valve block
- 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.)
- Expired - Fee Related
Links
- 238000004891 communication Methods 0.000 claims description 31
- 210000000664 rectum Anatomy 0.000 claims description 13
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 239000000956 alloy Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 240000006909 Tilia x europaea Species 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 230000004323 axial length Effects 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004904 shortening Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 8
- 238000010276 construction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Landscapes
- Taps Or Cocks (AREA)
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 the formation testing of oil gas field completion and underground work field, especially, relate to a kind of self-balance formula down-hole full-bore ball-and-seat.
Background technology
At present both at home and abroad in completion formation testing and Downhole Construction, usually run into because strata pressure is greater than tubing string internal pressure make to scurry out on liquid in the tubing string phenomenon of existing overflow, severe patient can cause blowout; When carrying tubing string, because swabbing action also may cause, tubing string external and internal pressure is uneven to have an accident in addition, etc. these situations seriously jeopardize the safety of underground construction operation.At present, conventional kill-job and closing well are avoided this accident.
Yet, adopt closing well, kill-job to eliminate 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, kill-job meeting causes oil layer pollution; The 3rd, closing well, kill-job have extended the construction operation time, have reduced operating efficiency, have increased operating cost.
Summary of the invention
The object of the invention is to provide a kind of self-balance formula down-hole full-bore ball-and-seat, can be according to the real-time change of tubing string inside and outside differential pressure and switch in time voluntarily, prevent the generation of gas blowout accident, improved production security, shorten the activity duration, greatly improved operating efficiency, reduced operating cost.
For achieving the above object, according to an aspect of the present invention, provide a kind of self-balance formula down-hole full-bore ball-and-seat, it is characterized in that, having comprised: the first joint, has oil circuit latus rectum; The second joint, has oil circuit latus rectum, and first end is fixedly connected with the first joint, forms container cavity, on the second end inwall, is provided with the first location structure, the second joint on the inwall between the first location structure and the first joint, also include annular internal projection; Switch valve, coaxially arrange with the first joint and the second joint, and be positioned at container cavity, comprise the valve block that there is the valve seat of oil circuit latus rectum and be arranged on the port of export of valve seat, valve seat is fixedly connected with the first joint, on the outer wall that is positioned at annular internal projection top of valve seat, is provided with the second location structure; Sliding sleeve, is arranged in the annular chamber of the second joint and switch valve formation, and sliding sleeve in axial direction slides between the first location structure and the second location structure, and drives and be connected with valve block, and sliding sleeve is provided with flange near the first end of the first joint; Sliding sleeve and the first joint, the second joint and switch valve surround respectively and first seal chamber of managing interior space and communicating, and the second seal chamber communicating with the pipe external space; Valve block has the first duty of close port when external pressure is greater than interior pressure and the second duty of opening valve port when interior pressure is more than or equal to external pressure.
Further, on the ring wall of the switch valve between the first location structure and the second location structure, offer interior communication passage, in sliding sleeve correspondence, on the ring wall of communication passage, offer extension passage, interior communication passage coordinates with extension passage, space and the first seal chamber in common communicating pipe; On the ring wall of the second joint between the bottom surface of the second location structure and the first joint, offer outer communication passage, outer communication passage is communicated with the second seal chamber and the pipe external space.
Further, valve block is arranged on the exit of valve seat rotationally by being arranged on the rotating shaft of valve seat one side, and valve block comprises the valve block main body that is positioned at rotating shaft the first side, and the cam that is positioned at rotating shaft the second side; The position of the corresponding cam of sliding sleeve is provided with adjusting opening, and cam stretches into and regulates in opening, according to the state that regulates the position adjustments valve block main body of opening.
Further, on the end face of the port of export one lateral edges of valve seat, be fixedly installed a pair of lug, rotating shaft is arranged on lug rotationally.
Further, regulate opening to comprise upper edge and lower edge, upper edge when valve block sealing valve port with the upper side laminating of cam, lower edge when valve block is opened completely and the downside of cam fit.
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 limes superiors position, and the lower edge of extending passage flushes with the lower edge of communication passage when sliding sleeve is positioned at limit inferior position.
Further, sliding sleeve is in regulating opening part to be divided into upper sliding sleeve and low sleeve along circumferential direction, and upper sliding sleeve is fixedly connected with low sleeve.
Further, the second joint comprises upper end and the bottom being fixed together, and upper end comprises annular internal projection, and bottom comprises the first location structure.
Further, valve block is the butterfly valve block being removably disposed in rotating shaft.
Further, on the exit end face of valve seat, be provided with soft metal layer or mild alloy layer.
The present invention has following beneficial effect:
1. sliding sleeve and the first joint, the second joint and one way valve surround respectively and first seal chamber of managing interior space and communicating, and the second seal chamber communicating with the pipe external space, sliding sleeve and valve block drive and are connected, the first duty of close port or open the second duty of valve port when interior pressure is more than or equal to external pressure while making valve block be in external pressure to be greater than interior pressure.Owing to by tubing string inside and outside differential pressure, the switching of ball-and-seat being controlled, ball-and-seat can be according to the real-time change of inside and outside differential pressure and switch in time voluntarily, has improved production security, has shortened the activity duration, has improved operating efficiency.
2. regulate opening to comprise upper edge and lower edge, upper edge when valve block sealing valve port with the laminating of cam upper side, lower edge when valve block is opened completely and the downside of cam fit.Owing to regulating the upper lower edge of opening, be that face contacts with the upper and lower side of cam respectively, make valve block to open completely or to close, guaranteed the duty of valve block.
3. valve block is the butterfly valve block being removably disposed in rotating shaft, when valve block damages or lost efficacy, can to valve block, change in time on the one hand, and on the other hand, butterfly valve block adjusting function is good, can bear higher pressure.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of self-balance according to an embodiment of the invention formula down-hole full-bore ball-and-seat when closed condition;
Fig. 2 is the structural representation of self-balance according to an embodiment of the invention formula down-hole full-bore ball-and-seat when open mode;
Fig. 3 is according to the structure for amplifying schematic diagram at the L place of Fig. 1;
Fig. 4 is to sectional structure schematic diagram according to the A-A of Fig. 1; And
Fig. 5 is according to the structure for amplifying schematic diagram at 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, self-balance formula down-hole full-bore ball-and-seat comprises that the first joint 10 and the second joint 20, the first joints 10 are fixedly connected with the first end of the second joint 20, and this is fixedly connected with mode is for example welding.In the second joint 20, be formed with container cavity 21, in container cavity 21, be provided with switch valve 30.In switch valve 30 and the formed annular housing of the second joint 20, be provided with sliding sleeve 40, sliding sleeve 40 is set on switch valve 30, and can slide along the axial direction of switch valve 30.
The first joint 10, the second joint 20 and switch valve 30 have included oil circuit latus rectum, and oil circuit latus rectum is not less than the internal diameter of working string.Sliding sleeve 40, the first joint 10, the second joint 20 and switch valve 30 cooperatively interact, and form the first seal chamber 211 communicating with space in pipe and the second seal chamber 212 communicating with the pipe external space.Switch valve 30 has the first duty of close port when external pressure is greater than interior pressure, and the second duty of opening valve port when interior pressure is greater than external pressure.
Ball-and-seat is arranged on the pipeline of working string, once tubing string external pressure occurs abnormal, cause tubing string external pressure to be greater than tubing string internal pressure, ball-and-seat can be due to the pipe effect of external and internal pressure the valve port of closing switch valve 30, prevent from, because of the variation of borehole pressure, the security incidents such as overflow or blowout occur, guarantee the safety of completion formation testing and Downhole Construction.Once it is normal that tubing string external and internal pressure recovers, the switch valve in ball-and-seat is opened valve port in time due to the variation of external and internal pressure, and formation testing and underground work are proceeded.
In conjunction with referring to Fig. 1, the first joint 10 first ends have step installing hole, and wherein the endoporus in large footpath is for being connected with working string, and the endoporus internal diameter of path is identical with the internal diameter of working string, are convenient to the transmission of fluid etc.The second end of the first joint 10 has the structure matching with the second joint 20 and switch valve 30.The second joint 20 is connected on the outside step of the first joint 10 second ends, and the inner wall sleeve of the second joint 20 is located on the step outer wall of the first joint 10, forms respectively location structure axially and radially.Switch valve 30 is connected in the inner side step of the first joint 10, and the inwall of the inner side step of the outer wall of switch valve 30 and the first joint 10 fits.
The second joint 20 comprises 25He bottom, upper end 26 two parts.25He bottom, upper end 26 is fixed together, and surrounds container cavity 21 with the first joint 10.The first end of upper end 25 and the first joint 10 are welded and fixed, and the end position of the second end is provided with annular internal projection 23, and the outer wall of the inwall of annular internal projection 23 and sliding sleeve 40 fits.On the annular tube wall of the upper end 25 above annular internal projection 23, be provided with outer communication passage 24, outer communication passage 24 connects the barrel of upper end 25, and the space outerpace of working string is connected with container cavity 21.
The first end of the bottom 26 of the second joint 20 is fixedly connected with the second end of upper end 25, the second end bottom of bottom 26 is provided with the first location structure 22, the first location structure 22 is given prominence to and is arranged on the sliding path of sliding sleeve 40, to determine the extreme lower position of sliding sleeve 40 down slidings.The internal diameter of the first location structure 22 is greater than the internal diameter of sliding sleeve 40, and below is provided with the oil circuit latus rectum being communicated with working string.The second end end of bottom 26 is provided with outside jointing, is convenient to be connected with oil circuit tubing string.
In another embodiment, the second joint 20 can be also a monolithic construction, be that 25He bottom, upper end 26 is integrated and processes, the positioning step that wherein limits the movement position of sliding sleeve 40 is positioned at the bottom of the second joint 20, annular internal projection 23 is positioned on the inwall of the second joint 20 of positioning step top, and outer communication passage 24 is arranged on the outer wall of the 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 the first joint 10 and the second joint 20 coaxially arrange, and comprise valve seat 31 and the valve block 32 with oil circuit latus rectum.Valve block 32 is arranged on the second end (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.
The first end of valve seat 31 is fixedly connected with the first joint 10, and the oil circuit latus rectum on it docks with the oil circuit latus rectum of the first joint 10.On the outer wall on valve seat 31 tops, be provided with the second location structure 311.The second location structure 311 is arranged on communication passage 24 belows, the extreme higher position moving upward for limiting sliding sleeve 40.The second location structure 311 is for annular outer plays structure, and and the inwall of the second joint 20 between there is gap, guarantee that the annular space of the second location structure 311 both sides is interconnected.On the barrel of the valve seat 31 of the second location structure 311 belows, be 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.
On the end face of the second end end one side of valve seat 31, be 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.On the sustained height of two lugs 312, be relatively set with shaft hole, rotating shaft 34 is arranged on 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.Valve seat 31 second end internal oil passages latus rectum week side end face, on end face, be provided with soft metal or mild alloy coating flushing.Soft metal or mild alloy coating not only can guarantee that coating can bear higher external pressure, improve the practicality of valve seat 31, and due to the material behavior of soft metal and mild alloy, make valve block 32 when sealing valve port, can be partially submerged in soft metal or mild alloy coating, make valve block 32 tightr with valve seat 31 laminatings, guaranteed the sealing performance of ball-and-seat.
The edge of valve block 32 is provided with shaft hole, and shaft hole two ends have and coordinate with lug 312 and be fastened on two structures between lug 312.Valve block 32 is arranged between lug 312, and by 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 due to year for a long time or be subject to impacting excessive when damaging or losing efficacy, dismountable structure can be changed staff in time to valve block 32, and does not affect the use of other parts of ball-and-seat, can be effectively cost-saving.
The both sides of cam 322 are arranged in lug 312, and are fixedly connected with by rotating shaft 34.Cam 322, along the oblique lower bending of radial direction of valve block main body 321, makes to form obtuse bending angle between cam 322 and valve block main body 321.The head of cam 322 is arc transition structure.Cam 322 can rotate in recess outside the end face of valve seat 31, makes sliding sleeve 40 regulate opening or closed condition of valve port by controlling cam 322 rotations.
Sliding sleeve 40 is arranged in the annular space between the second location structure 311 of valve seat 31 and the first location structure 22 of the second joint 20, and the outer wall of inwall and opening valve 30 fits.Sliding sleeve 40 comprises upper sliding sleeve 44 and low sleeve 45 two parts that are fixedly connected with, and the link position place of upper sliding sleeve 44 and low sleeve 45 includes and regulates opening 43, cam 322 to be arranged in adjusting opening 43.Regulate opening 43 to comprise 431He lower edge, upper edge 432, upper sliding sleeve 44 and low sleeve 45 take that to regulate the circumferential plane between the 431He lower edge, upper edge 432 of opening 43 be boundary, 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 the second joint 20 fits, the upper surface of flange 41 can upward sliding to the soffit of the second location structure 311 of the valve seat 31 of fitting.It is isolated with the interior space of pipe that the flange 41 of sliding sleeve 40, the upper end of the second joint 20 25, the first joint 10 and valve seat 31 surround the second seal chamber 212, the second seal chambers 212, and be communicated with the pipe external space by outer communication passage 24.
The bottom of upper sliding sleeve 44 comprises that 431， upper edge 431, upper edge fits with the upper side of cam 322 when valve block 32 is completely closed, makes valve block 32 have good position location, and can by the pressure of sliding sleeve 40, make valve block 32 seal better valve port.Surface contact structure makes upper edge 431 in the situation that providing enough pressure for valve block 32, reduce 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 coordinate with barrel, the interior annular protrusion 23 of the second joint 20, form the first seal chamber 211.The first seal chamber 211 is isolated with the pipe external space.In corresponding on upper sliding sleeve 44, on the barrel of communication passage 33, be provided with and extend passage 42.Extend passage 42 and run through the barrel of upper sliding sleeve 44, and communicate with interior communication passage 33, in managing, space is communicated with the first seal chamber 211.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 moving upward, the lower edge of extending passage 42 flushes with the lower edge of communication passage 33 when sliding sleeve 40 is positioned at limit inferior position, guarantees to extend passage 42 effective in the sliding stroke of sliding sleeve 40 all the time.
Low sleeve 45 comprises the lower edge 432 that regulates opening 43.The lower edge 432 of low sleeve 45 when valve block 32 is opened completely and the downside of cam 322 fit, when valve block 32 is opened completely between the lower edge of low sleeve 45 and the downside of cam 322 for face contacts, prevent cam 322 unbalance stress of valve block 32 and be out of shape.Because the soffit of valve block main body 321 has the structure that the inwall with sliding sleeve 40 fits, guarantee that valve block 32 can open completely, make runner keep smooth and easy.
The mode that is fixedly connected with between low sleeve 45 and 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 butterfly valve block.
In another embodiment, sliding sleeve 40 can be also integral type structure, passes through stud connection, and in cam 322, be provided with slip elongated slot between the lower end of sliding sleeve 40 and cam 322, and hinge can be in the interior slip of cam 322.By controlling upper-lower position and the position of hinge in the slip elongated slot of cam 322 of sliding sleeve 40, can control the valve port that valve seat 31 was opened or closed to valve block 32, realize automatic control function.
In another embodiment, valve block 32 also can be set directly at the end position of valve seat 31, and need not increase lug 312 in the end of valve seat 31.This setup need to be transformed the syndeton of valve seat 31, and according to the port shape of valve seat 31, the surface structure of valve block 32 is carried out to corresponding transformation, to guarantee that valve block 32 can arrive limes superiors position (being position location, top) time at sliding sleeve 40 and open completely, at sliding sleeve 40, reach limit inferior position (being position location, bottom) time and seal completely.
According to the ball-and-seat of the present embodiment, can be arranged on any position of working string, and can on working string, arrange a plurality of, good airproof performance, simple in structure.
When ball-and-seat is assembled, first valve seat 31 is fixedly connected with the first joint 10, then the upper sliding sleeve of sliding sleeve 40 44 is arranged on outside valve seat 31, afterwards valve block 32 is arranged on to lug 312 places of valve seat 31 ends, with rotating shaft 34, valve block 32 and valve seat 31 are linked together, and make cam 322 be positioned at adjusting opening 43 places on upper sliding sleeve 44.Afterwards low sleeve 45 is alignd with upper sliding sleeve 44, and together with upper sliding sleeve 44 is bolted to connection with low sleeve 45.The upper end of the second joint 20 25 is set in outside sliding sleeve 40, and is fixedly connected with the first joint 10, finally by 25 alignment of the 26Yu upper end, bottom of the second joint 20, and be bolted to connection, complete the assembling of ball-and-seat.Afterwards the ball-and-seat assembling is arranged on working string.
When carrying out oil gas well completion formation testing or underground work, once the generation of pipe external space pressure is abnormal, and sharply raises, can produce high-pressure slurry etc. around at tubing string.High-pressure slurry enters in the second seal chamber 212 from outer communication passage 24.Because pipe external space pressure is greater than space pressure in pipe, high-pressure slurry orders about sliding sleeve 40 along the inner tubal wall down sliding of the second joint 20, and the mud in the first seal chamber 211 enters space in pipe after extension passage 42 is flowed through interior communication passage 33.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 gradually valve port.
When sliding sleeve 40 moves downward the first location structure 22 place, sliding sleeve 40 stops moving downward, now regulate the upper edge 431 of opening 43 to fit with the upper surface of the cam 322 of valve block 32, the port of export end face laminating of the upper surface of valve block main body 321 and valve seat 31, valve port sealing, high-pressure slurry cannot overflow by managing interior space outside pipe, thereby has avoided the generation of the security incidents such as overflow or blowout, has improved the safety of producing.
When operating personnel process pipe external space pressure anomaly, make to manage after the reply normally of external space pressure, in pipe, space pressure starts to be greater than pipe external space pressure.Now in pipe, space mud etc. is flowed through after extending passage 42 and is entered in the first seal chamber 211 from interior communication passage 33, and the high-pressure slurry in the first seal chamber 211 etc. orders about sliding sleeve 40 to start 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 starts gradually to open valve port.Because high-pressure slurry constantly enters in the first seal chamber 211 from managing interior space, so sliding sleeve 40 constantly moves upward under the effect of high-pressure slurry, and band moving valve plate 32 is constantly opened valve port.
When sliding sleeve 40 moves upward to the second location structure 311 place, due to the barrier effect of the second location structure 311, sliding sleeve 40 stops moving upward.Now regulate the lower edge 432 of opening 43 to fit 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 completely, 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.
Can find out from the above description, according to embodiments of the invention, sliding sleeve and the first joint, the second joint and one way valve surround respectively and first seal chamber of managing interior space and communicating, and the second seal chamber communicating with the pipe external space, sliding sleeve and valve block drive and are connected, the first duty of close port or open the second duty of valve port when interior pressure is more than or equal to external pressure while making valve block be in external pressure to be greater than interior pressure.Owing to by tubing string inside and outside differential pressure, the switching of ball-and-seat being controlled, ball-and-seat can be according to the real-time change of inside and outside differential pressure and switch in time voluntarily, has improved production security, has shortened the activity duration, has improved operating efficiency.Regulate opening to comprise upper edge and lower edge, upper edge when valve block sealing valve port with the laminating of cam upper side, lower edge when valve block is opened completely and the downside of cam fit.Owing to regulating the upper lower edge of opening, be that face contacts with the upper and lower side of cam respectively, make valve block to open completely or to close, guaranteed the duty of valve block.Valve block is the butterfly valve block being removably disposed in rotating shaft, when valve block damages or lost efficacy, can to valve block, change in time on the one hand, and on the other hand, butterfly valve block adjusting function is good, can bear higher pressure.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a self-balance formula down-hole full-bore ball-and-seat, is characterized in that, comprising:
The first joint (10), has oil circuit latus rectum;
The second joint (20), there is described oil circuit latus rectum, the first end of the second joint (20) is fixedly connected with described the first joint (10), form container cavity (21), on the second end inwall of the second joint (20), be provided with the first location structure (22), being positioned on the inwall between described the first location structure (22) and described the first joint (10) of described the second joint (20) also includes annular internal projection (23);
Switch valve (30), coaxially arrange with described the first joint (10) and described the second joint (20), and be positioned at described container cavity (21), comprise the valve block (32) that there is the valve seat (31) of described oil circuit latus rectum and be arranged on the port of export of described valve seat (31), described valve seat (31) is fixedly connected with described the first joint (10), on the outer wall that is positioned at described annular internal projection (23) top of described valve seat (31), is provided with the second location structure (311);
Sliding sleeve (40), be arranged in the annular chamber of described the second joint (20) and described switch valve (30) formation, described sliding sleeve (40) in axial direction slides between described the first location structure (22) and described the second location structure (311), and drive and be connected with described valve block (32), described sliding sleeve (40) is provided with flange (41) near the first end of described the first joint (10);
Described sliding sleeve (40) and described the first joint (10), described the second joint (20) and described switch valve (30) surround respectively and first seal chamber (211) of managing interior space and communicating, and the second seal chamber (212) communicating with the pipe external space;
On the ring wall of the described switch valve (30) between described the first location structure (22) and described the second location structure (311), offer interior communication passage (33), on the ring wall of the corresponding described interior communication passage of described sliding sleeve (40) (33), offer and extend passage (42), described interior communication passage (33) coordinates with described extension passage (42), is jointly communicated with space and described the first seal chamber (211) in described pipe;
On the ring wall of the second joint (20) between the bottom surface of described the second location structure (311) and described the first joint (10), offer outer communication passage (24), described outer communication passage (24) is communicated with described the second seal chamber (212) and the described pipe external space;
Described valve block (32) has the first duty of close port when external pressure is greater than interior pressure and the second duty of opening valve port when interior pressure is more than or equal to external pressure.
2. self-balance formula according to claim 1 down-hole full-bore ball-and-seat, is characterized in that,
Described valve block (32) is arranged on the exit of described valve seat (31) rotationally by being arranged on the rotating shaft (34) of described valve seat (31) one sides, described valve block (32) comprises the valve block main body (321) that is positioned at described rotating shaft (34) first sides, and the cam (322) that is positioned at described rotating shaft (34) second sides;
The position of the corresponding described cam of described sliding sleeve (40) (322) is provided with and regulates opening (43), and described cam (322) stretches in described adjusting opening (43), according to the state of valve block main body (321) described in the position adjustments of described adjusting opening (43).
3. self-balance formula according to claim 2 down-hole full-bore ball-and-seat, it is characterized in that, on the end face of the port of export one lateral edges of described valve seat (31), be fixedly installed a pair of lug (312), described rotating shaft (34) is arranged on described lug (312) rotationally.
4. self-balance formula according to claim 2 down-hole full-bore ball-and-seat, it is characterized in that, described adjusting opening (43) comprises upper edge (431) and lower edge (432), described upper edge (431) is when described valve block (32) seals described valve port and the upper side of described cam (322) laminating, and fit with the downside of described cam (322) when described valve block (32) is opened completely described lower edge (432).
5. self-balance formula according to claim 1 down-hole full-bore ball-and-seat, it is characterized in that, the axial length of described interior communication passage (33) is the stroke that endwisely slips of described sliding sleeve (40), the upper edge of described extension passage (42) flushes with the upper edge of described communication passage (33) when described sliding sleeve is positioned at limes superiors position, and the lower edge of described extension passage (42) flushes with the lower edge of described communication passage (33) when described sliding sleeve (40) is positioned at limit inferior position.
6. according to the self-balance formula down-hole full-bore ball-and-seat described in any one in claim 2 to 4, it is characterized in that, described sliding sleeve (40) is located to be divided into upper sliding sleeve (44) and low sleeve (45) along circumferential direction in described adjusting opening (43), and described upper sliding sleeve (44) is fixedly connected with described low sleeve (45).
7. according to the self-balance formula down-hole full-bore ball-and-seat described in any one in claim 1 to 5, it is characterized in that, described the second joint (20) comprises upper end (25) and bottom (26) that are fixed together, described upper end (25) comprises described annular internal projection (23), and described bottom (26) comprise described the first location structure (22).
8. according to the self-balance formula down-hole full-bore ball-and-seat described in any one in claim 1 to 5, it is characterized in that, described valve block (32) is for being removably disposed in the butterfly valve block in rotating shaft (34).
9. according to the self-balance formula down-hole full-bore ball-and-seat described in any one in claim 1 to 5, it is characterized in that, on the exit end face of described valve seat (31), be provided with soft metal layer or mild alloy layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110236605.7A CN102418496B (en) | 2011-08-17 | 2011-08-17 | Self-balanced underground full-bore check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110236605.7A CN102418496B (en) | 2011-08-17 | 2011-08-17 | Self-balanced underground full-bore check valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102418496A CN102418496A (en) | 2012-04-18 |
| CN102418496B true CN102418496B (en) | 2014-01-22 |
Family
ID=45943116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110236605.7A Expired - Fee Related CN102418496B (en) | 2011-08-17 | 2011-08-17 | Self-balanced underground full-bore check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102418496B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2013395452B2 (en) * | 2013-09-20 | 2017-10-12 | Flowpro Well Technology | System and method for controlling flow in a pipe using a finger valve |
| CN106223899B (en) * | 2016-09-21 | 2019-01-18 | 库尔勒施得石油技术服务有限公司 | Single current by-passing valve and the method for carrying out kill-job using single current by-passing valve |
| CN107503712B (en) * | 2017-09-06 | 2020-07-17 | 成都百胜野牛科技有限公司 | Fluid separation device, well structure, and method for producing oil or natural gas |
| CN107339080B (en) * | 2017-09-06 | 2020-10-30 | 成都百胜野牛科技有限公司 | Fluid separation device, well structure, and method for producing 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3344480A1 (en) * | 1983-12-06 | 1985-06-20 | Moller, Falk von, Dipl.-Ing. (FH), 3100 Celle | Safety shut-off valve |
| US5862864A (en) * | 1995-02-03 | 1999-01-26 | Petroleum Engineering Services Limited | Well safety system |
| CN201202430Y (en) * | 2008-06-02 | 2009-03-04 | 四川海洋特种技术研究所 | Boring tool inner blowout preventer |
| CN101629480A (en) * | 2009-07-31 | 2010-01-20 | 中国石油集团西部钻探工程有限公司准东钻井公司 | Inner blowout preventer of full-port drilling tool |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6769490B2 (en) * | 2002-07-01 | 2004-08-03 | Allamon Interests | Downhole surge reduction method and apparatus |
| US7798229B2 (en) * | 2005-01-24 | 2010-09-21 | Halliburton Energy Services, Inc. | Dual flapper safety valve |
| US8191634B2 (en) * | 2009-05-19 | 2012-06-05 | Baker Hughes Incorporated | Magnetic flapper shock absorber |
-
2011
- 2011-08-17 CN CN201110236605.7A patent/CN102418496B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3344480A1 (en) * | 1983-12-06 | 1985-06-20 | Moller, Falk von, Dipl.-Ing. (FH), 3100 Celle | Safety shut-off valve |
| US5862864A (en) * | 1995-02-03 | 1999-01-26 | Petroleum Engineering Services Limited | Well safety system |
| CN201202430Y (en) * | 2008-06-02 | 2009-03-04 | 四川海洋特种技术研究所 | Boring tool inner blowout preventer |
| CN101629480A (en) * | 2009-07-31 | 2010-01-20 | 中国石油集团西部钻探工程有限公司准东钻井公司 | Inner blowout preventer of full-port drilling tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102418496A (en) | 2012-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102418496B (en) | Self-balanced underground full-bore check valve | |
| US6196261B1 (en) | Flapper valve assembly with seat having load bearing shoulder | |
| US6422317B1 (en) | Flow control apparatus and method for use of the same | |
| AU733356B2 (en) | Flow control apparatus for use in a subterranean well and associated methods | |
| US6263910B1 (en) | Valve with secondary load bearing surface | |
| US5137089A (en) | Streamlined flapper valve | |
| CN107013190A (en) | Steam flooding well flow string and implementation | |
| CN104948148B (en) | A kind of stepless volume control device | |
| CN101832121A (en) | Horizontal well circulating gravel packing sand retention device | |
| CN108105420B (en) | High-pressure water pump outlet control valve | |
| CN105781508A (en) | Constant-pressure throttling device for small-diameter water injection well | |
| CN109736737A (en) | Method for snubbing tripping of reservoir gas drilling well | |
| CN204299841U (en) | A kind of thin oil horizontal well oil pump | |
| CN105781488A (en) | Small-diameter constant-pressure throttling device for water injection well | |
| CN104847306A (en) | Underground rod pipe safety valve | |
| CN201078483Y (en) | Hoisting type single pair tight seal cock valve | |
| CN113494258A (en) | Remote automatic control ultrahigh pressure fracturing wellhead device | |
| CN104533335A (en) | Integrated oil and gas reservoir protection tool assembly | |
| CN201202430Y (en) | Boring tool inner blowout preventer | |
| WO2015188452A1 (en) | Valve seat ring and multi-way valve having valve seat ring | |
| CN106089663B (en) | Continuous two-way lifting oil pump | |
| CN209924961U (en) | Underground manual blowout prevention switch valve | |
| CN111927352A (en) | Continuous circulation device for drilling fluid and using method thereof | |
| CN110513070A (en) | Turnover plate type down-hole oil tube liquid controlled blowout preventing device | |
| CN205805531U (en) | Operating Pressure annulus logging wellhead assembly |
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 | ||
| C56 | Change in the name or address of the patentee |
Owner name: HUNAN GANGTUO ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER NAME: CHANGSHA GANGTUO ENERGY TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 410015 Hunan province city Changsha Yingpan Road No. 108 building room 922 Lingyu Patentee after: HUNAN GANGTUO ENERGY TECHNOLOGY CO.,LTD. Address before: 410015 Hunan province city Changsha Yingpan Road No. 108 building room 922 Lingyu Patentee before: CHANGSHA GANGTUO ENERGY TECHNOLOGY Co.,Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 410008 Xiangjiang Road, Hunan province Changsha Kaifu District, three No. 1200 Beichen Delta D3 District 1 building 4001 room Patentee after: HUNAN GANGTUO ENERGY TECHNOLOGY CO.,LTD. Address before: 410015 Hunan province city Changsha Yingpan Road No. 108 building room 922 Lingyu Patentee before: HUNAN GANGTUO ENERGY TECHNOLOGY CO.,LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140122 |