CN101906949B - Underbalanced well completion tool - Google Patents
Underbalanced well completion tool Download PDFInfo
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- CN101906949B CN101906949B CN 201010260027 CN201010260027A CN101906949B CN 101906949 B CN101906949 B CN 101906949B CN 201010260027 CN201010260027 CN 201010260027 CN 201010260027 A CN201010260027 A CN 201010260027A CN 101906949 B CN101906949 B CN 101906949B
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Abstract
The invention relates to the technical field of underbalanced well completion downhole tools of oilfields, in particular to an underbalanced well completion tool which comprises an upper joint, a rubber cylinder blocking device, a suppressing device, a one-way liquid drainage device and a rubber plug, wherein the rubber cylinder blocking device which can expand and block a casing annulus after filling liquid is mounted at the lower part of the upper joint, the suppressing device is mounted at the lower part of the rubber cylinder blocking device, and the one-way liquid drainage device which can drain the internal pressure liquid is mounted at the lower part of the suppressing device. The underbalanced well completion tool has reasonable and compact structure and convenient use, and can lead the suppressing device to carry out pressure suppression by inputting the rubber plug, a rubber plug seat in the suppressing device cuts off a shear screw and goes downwards, and the pressure liquid simultaneously goes upwards through a check valve and enters into the rubber cylinder blocking device, thereby expanding a blocking rubber cylinder, blocking the annulus, then opening a sizing collar for carrying out well cementing operation, further effectively separating all oil and gas reservoirs, avoiding the liquid in a water outlet horizon to enter into a pipe, not affecting other horizons of oil reservoirs and having the characteristics of safety, reliability, simpleness and high efficiency.
Description
Technical field
The present invention relates to oil field insufficient balance well completion downhole tool technical field, is a kind of underbalanced well completion tool.
Background technology
For the underbalance well, completion mode commonly used mainly contains both at home and abroad: barefoot completion, liner-type well completion and casing cementing perforation completion at present.Wherein barefoot completion and liner-type well completion can not carry out the interlayer packing to reservoir; And the casing cementing perforation completion is under normal conditions, all will be first before completion by improve mud density well press steady after, again setting of casing cement the well, completion practice, thereby the effect of under balance pressure drilling protection in early stage oil reservoir is had a greatly reduced quality.Therefore, the completion method that existing underbalance well adopts has the following disadvantages in actual use: can't effectively separate each oil and gas reservoir, water exit liquid easily enters in the pipe, thereby easily affect other layers position oil reservoir, can not effectively protect oil-gas Layer.
Summary of the invention
The invention provides a kind of underbalanced well completion tool, it has solved that existing balance well completion method exists can't effectively separate each oil and gas reservoir, water exit liquid easily enters the problem in the pipe.
Technical scheme of the present invention realizes by following measures: a kind of underbalanced well completion tool, comprise top connection, packing element baffling device, pressure device, unidirectional pumping equipment and plug, the bottom of top connection is equipped with and is filled with the packing element baffling device that can expand and intercept casing annulus behind the liquid, the bottom of packing element baffling device is equipped with that dropping into can build the pressure behind the plug makes liquid enter the pressure device of packing element baffling device, and the bottom of pressure device is equipped with the unidirectional pumping equipment that internal pressure liquid is discharged.
The below is the further optimization and/or improvements to the foregoing invention technical scheme:
Above-mentioned pressure device can comprise the body that builds the pressure, plug seat, ball-and-seat and be no less than one shear screw; The inside of the body tube chamber that builds the pressure builds the pressure, the upper outside of body of building the pressure is intervally distributed with axial drainage trough, form the drainage boss between two adjacent axial drainage troughs, the build the pressure bottom of top by splicing sleeve and packing element baffling device of body is fixed together, and the tube chamber of the tube chamber that builds the pressure by splicing sleeve is connected with the tube chamber of packing element baffling device; The body internal upper part of body of building the pressure has the hole that axially builds the pressure, and suppresses connecting socket on the upper surface of the body that builds the pressure and is installed with and suppress union, suppresses the lower end of connecting socket and is connected with the upper end in the hole that axially builds the pressure; Build the pressure and suppress the liquid hole on the inwall of tube chamber, the respective shaft on the drainage boss lateral surface of body of building the pressure is equipped with radially single current valve opening to the hole lower end position that builds the pressure, the tube chamber that builds the pressure is connected with the single current valve opening by suppressing the liquid hole, and ball-and-seat is installed on the body that builds the pressure by the single current valve opening and the unidirectional inflow of tube chamber internal pressure liquid that builds the pressure is axially built the pressure in the hole; The plug cover for seat is contained in the tube chamber that builds the pressure and can moves up and down, there is the plug through hole that is communicated with build the pressure tube chamber top and bottom the inside of plug seat, there is respectively seal groove in the plug seat outside that correspondence is suppressed position, above and below, liquid hole, seal groove inside is separately installed with O-ring seal, the lower outside of plug seat has annular spacing groove, the position of corresponding annular spacing groove that builds the pressure in the body of body has and is no less than one screw counter bore, the outer end of screw counter bore is positioned on the bottom surface of axial drainage trough, the inner of screw counter bore is connected with the tube chamber that builds the pressure, the outer end of shear screw is fixedly mounted on the body that builds the pressure by screw counter bore, and the inner of shear screw holds out against on the bottom surface of annular spacing groove and can limit the plug seat and moves up and down.
Above-mentioned unidirectional pumping equipment can comprise guide shoe head, discharge opeing seat, sleeve, block plate, discharge opeing piston and piston spring; The guide shoe screw thread is arranged at the build the pressure lumen wall bottom that builds the pressure of body, the upper end of guide shoe head is sleeved in the tube chamber that builds the pressure and by guide shoe screw thread and the body that builds the pressure and is fixed together, the guide shoe chamber is arranged at the top of guide shoe head, the lower end of guide shoe head is hemispherical and has has the outside axial outage that is connected with the guide shoe chamber, the middle part of guide shoe head to be no less than one and raidal drainage hole that the outside is connected with the guide shoe chamber; On the lower inner wall of tube chamber of building the pressure annular spacing groove is arranged, the upper surface of annular spacing groove is the up-small and down-big spacing conical surface, and discharge opeing seat, sleeve and block plate are installed in the annular spacing groove from top to bottom successively, and the bottom of block plate is sitting on the upper surface of guide shoe head; The lower outside limited location boss of discharge opeing seat, the discharge opeing seat is pressed on the spacing conical surface by the upper surface of positive stop lug boss, there is axial discharge opeing seat hole at the center of discharge opeing seat, the bottom in discharge opeing seat hole is up-small and down-big tapered piston hole, the upper center of block plate has the annular snap platform, there is the stopper rod hole of running through block plate at the middle part of annular snap platform, has on the block plate in the annular snap platform outside to be no less than one liquid flow hole, and discharge opeing seat hole is connected with the guide shoe chamber by tube chamber and the liquid flow hole of tapered piston hole, sleeve successively; The discharge opeing piston comprises piston head and piston rod, and the lower end of piston head and the upper end of piston rod are connected as a single entity, and is hemispheric piston head upper end and holds out against on the inwall in tapered piston hole and can keep sealing, and the bottom of piston rod is sleeved in the stopper rod hole and also can moves up and down; Piston spring is sleeved on the piston rod, and the upper end of piston spring holds out against on the lower surface of piston head, and the lower end of piston spring is fixedly mounted on the annular snap platform.
Above-mentioned ball-and-seat can comprise spool, valve spring and gear cap; The outer end of suppressing the liquid hole is connected with the inner of single current valve opening by the little single current taper hole in large the inner, outer end, and the gear cap is fixed on the external port of single current valve opening and keeps sealing, and there is the valve rod blind hole at the inner center of gear cap; Spool comprises valve head and valve rod, the inner of valve rod and the outer end of valve head are connected as a single entity, valve head is sleeved on also can be along single current valve opening move left and right in the single current valve opening, the outer end of valve rod is sleeved on also can be along valve rod blind hole move left and right in the valve rod blind hole, be hemispheric valve head the inner and hold out against on the inwall of single current taper hole and can keep sealing, have outside the middle part of valve head to be no less than one and can be communicated with the single current taper hole and the intake chute in the hole that axially builds the pressure; Be set with valve spring on the valve rod, the inner of valve spring holds out against on the outer face of valve head, and the outer end of valve spring holds out against on the inner face of gear cap.
Above-mentioned packing element baffling device can be single packing element and intercepts tube coupling, packing element intercepts tube coupling can comprise the joint that builds the pressure, under the joint that builds the pressure, upper urceolus, lower urceolus, parent tube and obstruct packing element, on build the pressure joint and the lower inside that builds the pressure joint build the pressure on having respectively tube chamber and under the tube chamber that builds the pressure, on build the pressure joint and the lower outside that builds the pressure joint be intervally distributed with respectively the axial diversion groove, form flow guiding dummy club between two adjacent axial diversion grooves, the top of parent tube is fixedly mounted in the tube chamber that builds the pressure by screw thread, the bottom of parent tube is fixedly mounted on down in the tube chamber that builds the pressure by screw thread, on build the pressure the joint the bottom upper annular snap platform is arranged and is fixedly connected with urceolus, build the pressure down the joint top lower annular snap platform is arranged and is fixedly connected with lower urceolus, form every the cylinder annular space between the upper end of the lower end of upper urceolus and lower urceolus, form upper packing element annular space between upper outer tube inner wall and the parent tube external wall of upper portion, form the lower rubber cylinder annular space between lower outer tube inner wall and the parent tube bottom outer wall, the top that intercepts packing element is installed in the packing element annular space, the bottom that intercepts packing element is installed in the lower rubber cylinder annular space, the middle part that intercepts packing element is installed in the cylinder annular space also can expand laterally, the upper end that intercepts packing element with on build the pressure and form the chamber that builds the pressure between the lower end of joint, intercept the lower end and the lower chamber that builds the pressure under the formation between the upper end of saving that builds the pressure of packing element; On build the pressure and have and be no less than one upper joint fluid course in the body of joint, on build the pressure the joint the upper surface on the top connection screw is arranged and is installed with union, the lower end of top connection screw is connected with upper joint fluid course upper end, upper joint fluid course lower end with on the chamber that builds the pressure be connected; Building the pressure down has and is no less than one lower joint fluid course in the body of joint, build the pressure down the joint the lower surface on the lower contact screw is arranged and is installed with lower pipe connection, the inner chamber of lower pipe connection is connected by pipeline with the inner chamber of suppressing union, the upper end of lower contact screw is connected with lower joint fluid course lower end, lower joint fluid course upper end with under the chamber that builds the pressure be connected.
Above-mentioned packing element baffling device can be the packing element that is no less than two and intercepts tube coupling and be no less than one splicing sleeve; Packing element intercepts tube coupling can comprise the joint that builds the pressure, under the joint that builds the pressure, upper urceolus, lower urceolus, parent tube and obstruct packing element, on build the pressure joint and the lower inside that builds the pressure joint build the pressure on having respectively tube chamber and under the tube chamber that builds the pressure, on build the pressure joint and the lower outside that builds the pressure joint be intervally distributed with respectively the axial diversion groove, form flow guiding dummy club between two adjacent axial diversion grooves, the top of parent tube is fixedly mounted in the tube chamber that builds the pressure by screw thread, the bottom of parent tube is fixedly mounted on down in the tube chamber that builds the pressure by screw thread, on build the pressure the joint the bottom upper annular snap platform is arranged and is fixedly connected with urceolus, build the pressure down the joint top lower annular snap platform is arranged and is fixedly connected with lower urceolus, form every the cylinder annular space between the upper end of the lower end of upper urceolus and lower urceolus, form upper packing element annular space between upper outer tube inner wall and the parent tube external wall of upper portion, form the lower rubber cylinder annular space between lower outer tube inner wall and the parent tube bottom outer wall, the top that intercepts packing element is installed in the packing element annular space, the bottom that intercepts packing element is installed in the lower rubber cylinder annular space, the middle part that intercepts packing element is installed in the cylinder annular space also can expand laterally, the upper end that intercepts packing element with on build the pressure and form the chamber that builds the pressure between the lower end of joint, intercept the lower end and the lower chamber that builds the pressure under the formation between the upper end of saving that builds the pressure of packing element; On build the pressure and have and be no less than one upper joint fluid course in the body of joint, on build the pressure the joint the upper surface on the top connection screw is arranged and is installed with union, the lower end of top connection screw is connected with upper joint fluid course upper end, upper joint fluid course lower end with on the chamber that builds the pressure be connected; Building the pressure down has and is no less than one lower joint fluid course in the body of joint, build the pressure down the joint the lower surface on the lower contact screw is arranged and is installed with lower pipe connection, the upper end of lower contact screw is connected with lower joint fluid course lower end, lower joint fluid course upper end with under the chamber that builds the pressure be connected; Two adjacent packing elements intercept tube coupling and are serially connected by splicing sleeve, the packing element that is positioned at the below intercept tube coupling on build the pressure joint on the tube chamber of tube chamber by splicing sleeve that build the pressure be connected with the lower lower tube chamber that builds the pressure that saves that builds the pressure that the packing element that is positioned at the top intercepts tube coupling, the inner chamber that the packing element that is positioned at the below intercepts the upper union of tube coupling is connected by pipeline with the inner chamber that the packing element that is positioned at the top intercepts the lower pipe connection of tube coupling, and being positioned at, the inner chamber of the lower pipe connection of the packing element obstruct tube coupling of below is connected by pipeline with the inner chamber of suppressing union.
Above-mentioned upper joint fluid course can comprise nodal axisn to inlet opening, upper nodal axisn to fluid hole and upper pitch diameter to the liquid hole; Upper nodal axisn is to the body bottom of the joint that builds the pressure on inlet opening is positioned at, upper nodal axisn be positioned to the lower end import of inlet opening on the lower surface of upper annular snap platform and with on the chamber that builds the pressure be connected, upper nodal axisn is to the body internal upper part of the joint that builds the pressure on fluid hole is positioned at, upper nodal axisn is connected with top connection screw lower end to the upper end outlet of fluid hole, upper pitch diameter is positioned at the body middle part of the joint that builds the pressure to the liquid hole, upper pitch diameter is connected with the upper end of upper nodal axisn to inlet opening to the inner in liquid hole, upper pitch diameter is connected with the lower end of upper nodal axisn to fluid hole to the middle part in liquid hole, on build the pressure corresponding upper pitch diameter on the flow guiding dummy club lateral surface of joint to the outer end position in liquid hole the upper plug head screw is arranged, the inner of upper plug head screw is connected with the outer end of upper pitch diameter to the liquid hole by little upper pitch cone hole, large the inner, outer end, be installed with the middle part in the upper plug head screw with externally threaded upper plug head, there are six square toes the outer end of upper plug head, there is hemispheric seal head the inner of upper plug head, and seal head holds out against on the inwall in upper pitch cone hole and can keep sealing; Lower joint fluid course can comprise lower nodal axisn to inlet opening, lower nodal axisn to fluid hole and lower pitch diameter to the liquid hole; Lower nodal axisn is positioned at the body bottom of the lower joint that builds the pressure to inlet opening, lower nodal axisn is connected with lower contact screw upper end to the lower end import of inlet opening, lower nodal axisn is positioned at the body internal upper part of the lower joint that builds the pressure to fluid hole, lower nodal axisn be positioned to the outlet of the upper end of fluid hole on the upper surface of lower annular snap platform and with under the chamber that builds the pressure be connected, lower pitch diameter is positioned at the body middle part of the lower joint that builds the pressure to the liquid hole, lower pitch diameter is connected with the lower end of lower nodal axisn to fluid hole to the inner in liquid hole, lower pitch diameter is connected with the upper end of lower nodal axisn to inlet opening to the middle part in liquid hole, the corresponding lower pitch diameter on the flow guiding dummy club lateral surface of joint of building the pressure down has the lower end cap screw to the outer end position in liquid hole, the inner of lower end cap screw is connected with the outer end of lower pitch diameter to the liquid hole by little lower pitch cone hole, large the inner, outer end, be installed with the middle part in the lower end cap screw with externally threaded lower end cap, there are six square toes the outer end of lower end cap, there is hemispheric seal head the inner of lower end cap, and seal head holds out against on the inwall in lower pitch cone hole and can keep sealing.
Corresponding lower nodal axisn can have back pressure fluid injection screw radially and be installed with back pressure fluid injection joint to the medium position of fluid hole on the flow guiding dummy club lateral surface of the above-mentioned lower joint that builds the pressure; The inner of back pressure fluid injection screw is connected with the middle part of lower nodal axisn to fluid hole by the little back pressure fluid injection taper hole in large the inner, outer end, there is external screw thread in the outside, middle part of back pressure fluid injection joint and is fixedly mounted on the back pressure fluid injection screw, there are six square toes in the external screw thread outside of back pressure fluid injection joint, there is hemispheric seal head the inner of back pressure fluid injection joint, seal head holds out against on the inwall of back pressure fluid injection taper hole and can keep sealing, there are axial back pressure liquid injection hole and back pressure liquid injection hole radially in the inside of back pressure fluid injection joint, radially the external port of back pressure liquid injection hole is on the outer wall between the external screw thread of seal head and back pressure fluid injection joint, radially the inner port of back pressure liquid injection hole is connected with the axial inner port of back pressure liquid injection hole, and axially the external port of back pressure liquid injection hole is positioned on the outer face of back pressure fluid injection joint and saves the outside and be connected with lower building the pressure.
Reasonable and compact in structure of the present invention, easy to use, it builds the pressure pressure device by dropping into plug, plug seat in the pressure device is cut off shear screw and descending, makes simultaneously pressure fluid by being advanced into the packing element baffling device on the ball-and-seat, makes to intercept the packing element expansion and the packing annular space, open afterwards sizing collar and can carry out well cementing operation, thereby effectively separate each oil and gas reservoir, avoid water exit liquid to enter in the pipe, make other layers position oil reservoir unaffected, have characteristics safe and reliable, simple and effective.
Description of drawings
Accompanying drawing 1 is looked the sectional structure schematic diagram for the master of the top connection of most preferred embodiment of the present invention and packing element obstruct tube coupling.
Accompanying drawing 2 masters for the pressure device of most preferred embodiment of the present invention and unidirectional pumping equipment look the sectional structure schematic diagram.
Accompanying drawing 3 is the sectional structure schematic diagram at A-A place in the accompanying drawing 1.
Accompanying drawing 4 is the sectional structure schematic diagram at B-B place in the accompanying drawing 1.
Accompanying drawing 5 is the sectional structure schematic diagram at C-C place in the accompanying drawing 1.
Accompanying drawing 6 is the sectional structure schematic diagram at D-D place in the accompanying drawing 2.
Accompanying drawing 7 is the local structure for amplifying schematic diagram at the F place in the accompanying drawing 6.
Accompanying drawing 8 is the sectional structure schematic diagram at E-E place in the accompanying drawing 2.
Coding in the accompanying drawing is respectively: 1 for top connection, 2 on the joint that builds the pressure, 3 joints that build the pressure under being, 4 is upper urceolus, and 5 is lower urceolus, and 6 is parent tube, 7 for intercepting packing element, 8 on the tube chamber that builds the pressure, 9 under the tube chamber that builds the pressure, 10 is the axial diversion groove, and 11 is flow guiding dummy club, and 12 is upper annular snap platform, 13 is lower annular snap platform, and 14 is every the cylinder annular space, and 15 is upper packing element annular space, 16 is the lower rubber cylinder annular space, 17 on the chamber that builds the pressure, 18 under the chamber that builds the pressure, 19 are the top connection screw, and 20 is upper union, and 21 are the lower contact screw, 22 is lower pipe connection, 23 be upper nodal axisn to inlet opening, 24 is that upper nodal axisn is to fluid hole, 25 is that upper pitch diameter is to the liquid hole, 26 is the upper plug head screw, and 27 is upper pitch cone hole, and 28 is upper plug head, 29 is that lower nodal axisn is to inlet opening, 30 be lower nodal axisn to fluid hole, 31 be lower pitch diameter to the liquid hole, 32 is the lower end cap screw, 33 is lower pitch cone hole, 34 is lower end cap, and 35 is splicing sleeve, and 36 are the body that builds the pressure, 37 is the plug seat, 38 is shear screw, and 39 are the tube chamber that builds the pressure, and 40 is axial drainage trough, 41 are the drainage boss, 42 are the hole that axially builds the pressure, and 43 for suppressing connecting socket, and 44 for suppressing union, 45 for suppressing the liquid hole, 46 is the single current valve opening, and 47 is the plug through hole, and 48 is seal groove, 49 is annular spacing groove, 50 is screw counter bore, and 51 is valve spring, and 52 are the gear cap, 53 is the single current taper hole, 54 is the valve rod blind hole, and 55 is valve head, and 56 is valve rod, 57 is intake chute, 58 is the guide shoe head, and 59 are the discharge opeing seat, and 60 is sleeve, 61 is block plate, 62 are the discharge opeing piston, and 63 is piston spring, and 64 is the guide shoe screw thread, 65 is the guide shoe chamber, 66 is axial outage, and 67 is the raidal drainage hole, and 68 is annular spacing groove, 69 is the spacing conical surface, 70 is positive stop lug boss, and 71 are discharge opeing seat hole, and 72 is the tapered piston hole, 73 is the stopper rod hole, 74 is the annular snap platform, and 75 is liquid flow hole, and 76 is back pressure fluid injection screw, 77 is back pressure fluid injection joint, 78 is back pressure fluid injection taper hole, and 79 is axial back pressure liquid injection hole, and 80 are back pressure liquid injection hole radially.
The specific embodiment
The present invention is not subjected to the restriction of following embodiment, can determine concrete embodiment according to technical scheme of the present invention and actual conditions.
In the present invention, for convenience of description, the description of the relative position relation of each parts all is that the Butut mode according to Figure of description is described, as: upper and lower, about etc. position relationship be to determine according to the Butut direction of Figure of description.
The invention will be further described below in conjunction with most preferred embodiment and accompanying drawing:
Shown in accompanying drawing 1,2, this underbalanced well completion tool comprises top connection 1, packing element baffling device, pressure device, unidirectional pumping equipment and plug, the bottom of top connection 1 is equipped with and is filled with the packing element baffling device that can expand and intercept casing annulus behind the liquid, the bottom of packing element baffling device is equipped with that dropping into can build the pressure behind the plug makes liquid enter the pressure device of packing element baffling device, and the bottom of pressure device is equipped with the unidirectional pumping equipment that internal pressure liquid is discharged.By dropping into plug pressure device is built the pressure; make and be advanced into packing element baffling device packing annular space on the pressure fluid; open afterwards sizing collar and can carry out well cementing operation; therefore can directly separate the oil reservoir two ends; effectively separate each oil and gas reservoir, avoid water exit liquid to enter in the pipe; make other layers position oil reservoir unaffected, thereby brought into play better the technical advantage of under balance pressure drilling protection oil-gas Layer, the perfect completion mode of underbalance well.
Can according to actual needs, above-mentioned underbalanced well completion tool be made further optimization and/or improvements:
Shown in accompanying drawing 2,6,8, pressure device comprises the body 36 that builds the pressure, plug seat 37, ball-and-seat and is no less than one shear screw 38; The inside of body 36 tube chamber 39 that builds the pressure builds the pressure, the upper outside of body of building the pressure is intervally distributed with axial drainage trough 40, form drainage boss 41 between two adjacent axial drainage troughs 40, the build the pressure top of body 36 is fixed together by splicing sleeve 35 bottom with the packing element baffling device, and the tube chamber of the tube chamber 39 that builds the pressure by splicing sleeve 35 is connected with the tube chamber of packing element baffling device; The body internal upper part of body 36 of building the pressure has the hole 42 that axially builds the pressure, and suppresses connecting socket 43 on the upper surface of the body 36 that builds the pressure and is installed with and suppress union 44, suppresses the lower end of connecting socket 43 and is connected with the upper end in the hole 42 that axially builds the pressure; Build the pressure and suppress liquid hole 45 on the inwall of tube chamber 39, the respective shaft on drainage boss 41 lateral surfaces of body 36 of building the pressure is equipped with radially single current valve opening 46 to hole 42 lower end position that build the pressure, the tube chamber 39 that builds the pressure is connected with single current valve opening 46 by suppressing liquid hole 45, and ball-and-seat is installed on the body 36 that builds the pressure by single current valve opening 46 and the unidirectional inflow of tube chamber 39 internal pressure liquid that builds the pressure is axially built the pressure in the hole 42; Plug seat 37 is sleeved in the tube chamber 39 that builds the pressure and can moves up and down, there is the plug through hole 47 that is communicated with build the pressure tube chamber 39 tops and bottom the inside of plug seat 37, there is respectively seal groove 48 in plug seat 37 outsides that correspondence is suppressed position, 45 above and below, liquid hole, seal groove 48 inside are separately installed with O-ring seal, the lower outside of plug seat 37 has annular spacing groove 49, building the pressure, there is the screw counter bore 50 that is no less than the position of corresponding annular spacing groove 49 in the body of body 36, the outer end of screw counter bore 50 is positioned on the bottom surface of axial drainage trough 40, the inner of screw counter bore 50 is connected with the tube chamber 39 that builds the pressure, the outer end of shear screw 38 is fixedly mounted on the body 36 that builds the pressure by screw counter bore 50, and the inner of shear screw 38 holds out against on the bottom surface of annular spacing groove 49 and can limit plug seat 37 and moves up and down.Plug seat 37 can be fixed in the tube chamber 39 that builds the pressure by shear screw 38, only have and drop into plug and build the pressure to certain pressure, plug seat 37 just can be cut off shear screw 38, and plug seat 37 moves down, and the tube chamber 39 that builds the pressure of suppressing liquid hole 45 and plug top is connected just can suppresses.The top of plug seat 37 preferably is fixed with vulcanized rubber, so that the plugging effect of plug is better.
As shown in Figure 2, unidirectional pumping equipment comprises guide shoe head 58, discharge opeing seat 59, sleeve 60, block plate 61, discharge opeing piston 62 and piston spring 63; Guide shoe screw thread 64 is arranged at the build the pressure tube chamber 39 inwall bottoms that build the pressure of body 36, the upper end of guide shoe head 58 is sleeved in the tube chamber 39 that builds the pressure and by guide shoe screw thread 64 and the body 36 that builds the pressure and is fixed together, guide shoe chamber 65 is arranged at the top of guide shoe head 58, the lower end of guide shoe head 58 is hemispherical and has has the outside axial outage 66 that is connected with guide shoe chamber 65, the middle part of guide shoe head 58 to be no less than one and raidal drainage hole 67 that the outside is connected with guide shoe chamber 65; On the lower inner wall of tube chamber 39 of building the pressure annular spacing groove 68 is arranged, the upper surface of annular spacing groove 68 is the up-small and down-big spacing conical surface 69, discharge opeing seat 59, sleeve 60 and block plate 61 are installed in the annular spacing groove 68 from top to bottom successively, and the bottom of block plate 61 is sitting on the upper surface of guide shoe head 58; The lower outside limited location boss 70 of discharge opeing seat 59, discharge opeing seat 59 is pressed on the spacing conical surface 69 by the upper surface of positive stop lug boss 70, there is axial discharge opeing seat hole 71 at the center of discharge opeing seat 59, the bottom in discharge opeing seat hole 71 is up-small and down-big tapered piston hole 72, the upper center of block plate 61 has annular snap platform 74, there is the stopper rod hole 73 of running through block plate 61 at the middle part of annular snap platform 74, the liquid flow hole 75 that is no less than one is arranged on the block plate 61 in annular snap platform 74 outsides, and discharge opeing seat hole 71 is connected with guide shoe chamber 65 by tube chamber and the liquid flow hole 75 of tapered piston hole 72, sleeve 60 successively; Discharge opeing piston 62 comprises piston head and piston rod, the lower end of piston head and the upper end of piston rod are connected as a single entity, be hemispheric piston head upper end and hold out against on the inwall in tapered piston hole 72 and can keep sealing, the bottom of piston rod is sleeved on that stopper rod hole 73 is interior also to be moved up and down; Piston spring 63 is sleeved on the piston rod, and the upper end of piston spring 63 holds out against on the lower surface of piston head, and the lower end of piston spring 63 is fixedly mounted on the annular snap platform 74.
Shown in accompanying drawing 2,6,7, ball-and-seat comprises spool, valve spring 51 and gear cap 52; The outer end of suppressing liquid hole 45 is connected with the inner of single current valve opening 46 by the little single current taper hole 53 in large the inner, outer end, and gear cap 52 is fixed on the external port of single current valve opening 46 and keeps sealing, and there is valve rod blind hole 54 at the inner center of gear cap 52; Spool comprises valve head 55 and valve rod 56, the outer end of the inner of valve rod 56 and valve head 55 is connected as a single entity, valve head 55 is sleeved on also can be along single current valve opening 46 move left and right in the single current valve opening 46, the outer end of valve rod 56 is sleeved on also can be along valve rod blind hole 54 move left and right in the valve rod blind hole 54, be hemispheric valve head 55 the inners and hold out against on the inwall of single current taper hole 53 and can keep sealing, have outside the middle part of valve head 55 to be no less than one and can be communicated with single current taper hole 53 and the intake chute 57 in the hole 42 that axially builds the pressure; Be set with valve spring 51 on the valve rod 56, the inner of valve spring 51 holds out against on the outer face of valve head 55, and the outer end of valve spring 51 holds out against on the inner face of gear cap 52.
Such as accompanying drawing 1,3, shown in 5, the packing element baffling device is that single packing element intercepts tube coupling, packing element intercepts tube coupling and comprises the joint 2 that builds the pressure, under build the pressure the joint 3, upper urceolus 4, lower urceolus 5, parent tube 6 and obstruct packing element 7, on build the pressure joint 2 and the lower inside that builds the pressure joint 3 build the pressure on having respectively tube chamber 8 and under the tube chamber 9 that builds the pressure, on build the pressure joint 2 and the lower outside that builds the pressure joint 3 be intervally distributed with respectively axial diversion groove 10, form flow guiding dummy club 11 between two adjacent axial diversion grooves 10, the top of parent tube 6 is fixedly mounted on by screw thread in the tube chamber 8 that builds the pressure, the bottom of parent tube 6 is fixedly mounted on down in the tube chamber 9 that builds the pressure by screw thread, on joint 2 the bottom that builds the pressure upper annular snap platform 12 is arranged and is fixedly connected with urceolus 4, there is lower annular snap platform 13 on joint 3 the top that builds the pressure down and is fixedly connected with lower urceolus 5, form every cylinder annular space 14 between the upper end of the lower end of upper urceolus 4 and lower urceolus 5, form upper packing element annular space 15 between upper urceolus 4 inwalls and parent tube 6 external wall of upper portion, form lower rubber cylinder annular space 16 between lower urceolus 5 inwalls and the parent tube 6 bottom outer walls, the top that intercepts packing element 7 is installed in the packing element annular space 15, the bottom that intercepts packing element 7 is installed in the lower rubber cylinder annular space 16, the middle part that intercepts packing element 7 is installed in cylinder annular space 14 also can expand laterally, the upper end that intercepts packing element 7 with on build the pressure and form the chamber 17 that builds the pressure between the lower end of joint 2, the chamber 18 that builds the pressure under the formation between 3 the upper end is saved with lower building the pressure in the lower end that intercepts packing element 7; On build the pressure to have in joint 2 the body and be no less than one upper joint fluid course, on build the pressure and top connection screw 19 arranged and be installed with union 20 on joint 2 the upper surface, the lower end of top connection screw 19 is connected with upper joint fluid course upper end, upper joint fluid course lower end with on the chamber 17 that builds the pressure be connected; Build the pressure down to have in joint 3 the body and be no less than one lower joint fluid course, building the pressure down has lower contact screw 21 and is installed with lower pipe connection 22 on joint 3 the lower surface, the inner chamber of lower pipe connection 22 is connected by pipeline with the inner chamber of suppressing union 44, the upper end of lower contact screw 21 is connected with lower joint fluid course lower end, lower joint fluid course upper end with under the chamber 18 that builds the pressure be connected.
Shown in accompanying drawing 1,3,5, the packing element baffling device is to be no less than two packing element obstruct tube coupling and to be no less than one splicing sleeve 35; Packing element intercepts tube coupling and comprises the joint 2 that builds the pressure, under build the pressure the joint 3, upper urceolus 4, lower urceolus 5, parent tube 6 and obstruct packing element 7, on build the pressure joint 2 and the lower inside that builds the pressure joint 3 build the pressure on having respectively tube chamber 8 and under the tube chamber 9 that builds the pressure, on build the pressure joint 2 and the lower outside that builds the pressure joint 3 be intervally distributed with respectively axial diversion groove 10, form flow guiding dummy club 11 between two adjacent axial diversion grooves 10, the top of parent tube 6 is fixedly mounted on by screw thread in the tube chamber 8 that builds the pressure, the bottom of parent tube 6 is fixedly mounted on down in the tube chamber 9 that builds the pressure by screw thread, on joint 2 the bottom that builds the pressure upper annular snap platform 12 is arranged and is fixedly connected with urceolus 4, there is lower annular snap platform 13 on joint 3 the top that builds the pressure down and is fixedly connected with lower urceolus 5, form every cylinder annular space 14 between the upper end of the lower end of upper urceolus 4 and lower urceolus 5, form upper packing element annular space 15 between upper urceolus 4 inwalls and parent tube 6 external wall of upper portion, form lower rubber cylinder annular space 16 between lower urceolus 5 inwalls and the parent tube 6 bottom outer walls, the top that intercepts packing element 7 is installed in the packing element annular space 15, the bottom that intercepts packing element 7 is installed in the lower rubber cylinder annular space 16, the middle part that intercepts packing element 7 is installed in cylinder annular space 14 also can expand laterally, the upper end that intercepts packing element 7 with on build the pressure and form the chamber 17 that builds the pressure between the lower end of joint 2, the chamber 18 that builds the pressure under the formation between 3 the upper end is saved with lower building the pressure in the lower end that intercepts packing element 7; On build the pressure to have in joint 2 the body and be no less than one upper joint fluid course, on build the pressure and top connection screw 19 arranged and be installed with union 20 on joint 2 the upper surface, the lower end of top connection screw 19 is connected with upper joint fluid course upper end, upper joint fluid course lower end with on the chamber 17 that builds the pressure be connected; Build the pressure down to have in joint 3 the body and be no less than one lower joint fluid course, building the pressure down has lower contact screw 21 and is installed with lower pipe connection 22 on joint 3 the lower surface, the upper end of lower contact screw 21 is connected with lower joint fluid course lower end, lower joint fluid course upper end with under the chamber 18 that builds the pressure be connected; Two adjacent packing elements intercept tube coupling and are serially connected by splicing sleeve 35, the packing element that is positioned at the below intercept tube coupling on build the pressure joint 2 on build the pressure that the tube chamber of tube chamber 8 by splicing sleeve 35 and the packing element that is positioned at the top intercept tube coupling lower building the pressure save 3 the lower tube chamber 9 that builds the pressure and be connected, the inner chamber that the packing element that is positioned at the below intercepts the upper union 20 of tube coupling is connected by pipeline with the inner chamber that the packing element that is positioned at the top intercepts the lower pipe connection 22 of tube coupling, and being positioned at, the inner chamber of the lower pipe connection 22 of the packing element obstruct tube coupling of below is connected by pipeline with the inner chamber of suppressing union 44.Intercept tube coupling by a plurality of packing elements, can make the effect of separation more excellent.
Shown in accompanying drawing 1,3,5, upper joint fluid course comprise nodal axisn to inlet opening 23, upper nodal axisn to fluid hole 24 and upper pitch diameter to liquid hole 25; Upper nodal axisn is positioned at the body bottom of the joint 2 that builds the pressure to inlet opening 23, upper nodal axisn be positioned to the lower end import of inlet opening 23 on the lower surface of upper annular snap platform 12 and with on the chamber 17 that builds the pressure be connected, upper nodal axisn is positioned at the body internal upper part of the joint 2 that builds the pressure to fluid hole 24, upper nodal axisn is connected with top connection screw 19 lower ends to the upper end outlet of fluid hole 24, upper pitch diameter is positioned at the body middle part of the joint 2 that builds the pressure to liquid hole 25, upper pitch diameter is connected with the upper end of upper nodal axisn to inlet opening 23 to the inner in liquid hole 25, upper pitch diameter is connected with the lower end of upper nodal axisn to fluid hole 24 to the middle part in liquid hole 25, on build the pressure corresponding upper pitch diameter on joint 2 flow guiding dummy club 11 lateral surfaces to the outer end position in liquid hole 25 upper plug head screw 26 is arranged, the inner of upper plug head screw 26 is connected with the outer end of upper pitch diameter to liquid hole 25 by little upper pitch cone hole 27, large the inner, outer end, be installed with the middle part in the upper plug head screw 26 with externally threaded upper plug head 28, there are six square toes the outer end of upper plug head 28, there is hemispheric seal head the inner of upper plug head 28, and seal head holds out against on the inwall in upper pitch cone hole 27 and can keep sealing; Lower joint fluid course comprise lower nodal axisn to inlet opening 29, lower nodal axisn to fluid hole 30 and lower pitch diameter to liquid hole 31; Lower nodal axisn is positioned at the body bottom of the lower joint 3 that builds the pressure to inlet opening 29, lower nodal axisn is connected with lower contact screw 21 upper ends to the lower end import of inlet opening 29, lower nodal axisn is positioned at the body internal upper part of the lower joint 3 that builds the pressure to fluid hole 30, lower nodal axisn be positioned to the outlet of the upper end of fluid hole 30 on the upper surface of lower annular snap platform 13 and with under the chamber 18 that builds the pressure be connected, lower pitch diameter is positioned at the body middle part of the lower joint 3 that builds the pressure to liquid hole 31, lower pitch diameter is connected with the lower end of lower nodal axisn to fluid hole 30 to the inner in liquid hole 31, lower pitch diameter is connected with the upper end of lower nodal axisn to inlet opening 29 to the middle part in liquid hole 31, the corresponding lower pitch diameter on joint 3 flow guiding dummy club 11 lateral surfaces of building the pressure down has lower end cap screw 32 to the outer end position in liquid hole 31, the inner of lower end cap screw 32 is connected with the outer end of lower pitch diameter to liquid hole 31 by little lower pitch cone hole 33, large the inner, outer end, be installed with the middle part in the lower end cap screw 32 with externally threaded lower end cap 34, there are six square toes the outer end of lower end cap 34, there is hemispheric seal head the inner of lower end cap 34, and seal head holds out against on the inwall in lower pitch cone hole 33 and can keep sealing.Can discharge foreign material in upper joint fluid course and the lower joint fluid course by upper plug head screw 26 and lower end cap screw 32, need cut off build the pressure on outstanding joint 2 and lower building the pressure of upper plug head 28 and lower end cap 34 before actual the use and save the part of 3 flow guiding dummy club 11 lateral surfaces.
Shown in accompanying drawing 1,4, corresponding lower nodal axisn has back pressure fluid injection screw 76 radially and is installed with back pressure fluid injection joint 77 to the medium position of fluid hole 30 on flow guiding dummy club 11 lateral surfaces of the lower joint 3 that builds the pressure; The inner of back pressure fluid injection screw 76 is connected with the middle part of lower nodal axisn to fluid hole 30 by the little back pressure fluid injection taper hole 78 in large the inner, outer end, there is external screw thread in the outside, middle part of back pressure fluid injection joint 77 and is fixedly mounted on the back pressure fluid injection screw 76, there are six square toes in the external screw thread outside of back pressure fluid injection joint 77, there is hemispheric seal head the inner of back pressure fluid injection joint 77, seal head holds out against on the inwall of back pressure fluid injection taper hole 78 and can keep sealing, there are axial back pressure liquid injection hole 79 and back pressure liquid injection hole 80 radially in the inside of back pressure fluid injection joint 77, radially the external port of back pressure liquid injection hole 80 is on the outer wall between the external screw thread of seal head and back pressure fluid injection joint 77, radially the inner port of back pressure liquid injection hole 80 is connected with the axial inner port of back pressure liquid injection hole 79, and axially the external port of back pressure liquid injection hole 79 is positioned on the outer face of back pressure fluid injection joint 77 and saves 3 outsides and be connected with lower building the pressure.By back pressure fluid injection joint 77 can upwards build the pressure chamber 17 and the lower chamber 18 interior filling liquids generation back pressures that build the pressure, can also avoid intercepting adhesion impact normal operation between packing element 7 inwalls and parent tube 6 outer walls, tighten back pressure fluid injection joint 77 by six square toes afterwards and make 78 sealings of back pressure fluid injection taper hole, at last back pressure fluid injection joint 77 is given prominence to the part of flow guiding dummy club 11 lateral surfaces of the lower joint 3 that builds the pressure and cut off.
Above technical characterictic has consisted of most preferred embodiment of the present invention, and it has stronger compliance and best implementation result, can increase and decrease according to actual needs non-essential technical characterictic, satisfies the demand of different situations.
The course of work of most preferred embodiment of the present invention is: during completion, at first the present invention is connected on the completion tubular column by sizing collar, makes it together to enter well in company with completion tubular column; Then, when construction, dropping into plug builds the pressure, plug enters in the tube chamber 39 that builds the pressure of the body 36 that builds the pressure, be sitting in plug seat 37 upper ends and with 47 total blockages of plug through hole, pressure fluid makes plug seat 37 cut off shear screw 38 and descending, pressure fluid is pushed valve head 55 open simultaneously, from suppressing liquid hole 45 successively by single current taper hole 53, single current valve opening 46, hole 42 axially builds the pressure, suppress connecting socket 43, up by suppressing union 44, enter lower pipe connection 22 by pipeline, pass through successively lower nodal axisn to inlet opening 29 by lower contact screw 21, lower pitch diameter is to liquid hole 31, lower nodal axisn enters down the chamber 18 that builds the pressure to fluid hole 30, enter the chamber 17 that builds the pressure by the slit that intercepts between packing element 7 inwalls and parent tube 6 outer walls again, outwards promoting to intercept packing element 7 expands and the packing annular space it, continue to build the pressure, on build the pressure in the chamber 17 pressure fluids successively by upper nodal axisn to inlet opening 23, upper pitch diameter is to liquid hole 25, upper nodal axisn is to fluid hole 24, top connection screw 19 enters union 20, the packing element that enters upper level by pipeline intercepts tube coupling the lower chamber 18 of building the pressure is interior to be intercepted packing element 7 to outer promotion and makes its expansion, until the packing annular space; At last, open sizing collar and can carry out normal well cementing operation.
Claims (4)
1.
A kind of underbalanced well completion tool, it is characterized in that comprising top connection, packing element baffling device, pressure device, unidirectional pumping equipment and plug, the bottom of top connection is equipped with and is filled with the packing element baffling device that can expand and intercept casing annulus behind the liquid, the bottom of packing element baffling device is equipped with that dropping into can build the pressure behind the plug makes liquid enter the pressure device of packing element baffling device, and the bottom of pressure device is equipped with the unidirectional pumping equipment that internal pressure liquid is discharged; Wherein:
Pressure device comprises the body that builds the pressure, plug seat, ball-and-seat and is no less than one shear screw; The inside of the body tube chamber that builds the pressure builds the pressure, the upper outside of body of building the pressure is intervally distributed with axial drainage trough, form the drainage boss between two adjacent axial drainage troughs, the build the pressure bottom of top by splicing sleeve and packing element baffling device of body is fixed together, and the tube chamber of the tube chamber that builds the pressure by splicing sleeve is connected with the tube chamber of packing element baffling device; The body internal upper part of body of building the pressure has the hole that axially builds the pressure, and suppresses connecting socket on the upper surface of the body that builds the pressure and is installed with and suppress union, suppresses the lower end of connecting socket and is connected with the upper end in the hole that axially builds the pressure; Build the pressure and suppress the liquid hole on the inwall of tube chamber, the respective shaft on the drainage boss lateral surface of body of building the pressure is equipped with radially single current valve opening to the hole lower end position that builds the pressure, the tube chamber that builds the pressure is connected with the single current valve opening by suppressing the liquid hole, and ball-and-seat is installed on the body that builds the pressure by the single current valve opening and the unidirectional inflow of tube chamber internal pressure liquid that builds the pressure is axially built the pressure in the hole; The plug cover for seat is contained in the tube chamber that builds the pressure and can moves up and down, there is the plug through hole that is communicated with build the pressure tube chamber top and bottom the inside of plug seat, there is respectively seal groove in the plug seat outside that correspondence is suppressed position, above and below, liquid hole, seal groove inside is separately installed with O-ring seal, the lower outside of plug seat has annular spacing groove, the position of corresponding annular spacing groove that builds the pressure in the body of body has and is no less than one screw counter bore, the outer end of screw counter bore is positioned on the bottom surface of axial drainage trough, the inner of screw counter bore is connected with the tube chamber that builds the pressure, the outer end of shear screw is fixedly mounted on the body that builds the pressure by screw counter bore, and the inner of shear screw holds out against on the bottom surface of annular spacing groove and can limit the plug seat and moves up and down;
Unidirectional pumping equipment comprises guide shoe head, discharge opeing seat, sleeve, block plate, discharge opeing piston and piston spring; The guide shoe screw thread is arranged at the build the pressure lumen wall bottom that builds the pressure of body, the upper end of guide shoe head is sleeved in the tube chamber that builds the pressure and by guide shoe screw thread and the body that builds the pressure and is fixed together, the guide shoe chamber is arranged at the top of guide shoe head, the lower end of guide shoe head is hemispherical and has has the outside axial outage that is connected with the guide shoe chamber, the middle part of guide shoe head to be no less than one and raidal drainage hole that the outside is connected with the guide shoe chamber; On the lower inner wall of tube chamber of building the pressure annular spacing groove is arranged, the upper surface of annular spacing groove is the up-small and down-big spacing conical surface, and discharge opeing seat, sleeve and block plate are installed in the annular spacing groove from top to bottom successively, and the bottom of block plate is sitting on the upper surface of guide shoe head; The lower outside limited location boss of discharge opeing seat, the discharge opeing seat is pressed on the spacing conical surface by the upper surface of positive stop lug boss, there is axial discharge opeing seat hole at the center of discharge opeing seat, the bottom in discharge opeing seat hole is up-small and down-big tapered piston hole, the upper center of block plate has the annular snap platform, there is the stopper rod hole of running through block plate at the middle part of annular snap platform, has on the block plate in the annular snap platform outside to be no less than one liquid flow hole, and discharge opeing seat hole is connected with the guide shoe chamber by tube chamber and the liquid flow hole of tapered piston hole, sleeve successively; The discharge opeing piston comprises piston head and piston rod, and the lower end of piston head and the upper end of piston rod are connected as a single entity, and is hemispheric piston head upper end and holds out against on the inwall in tapered piston hole and can keep sealing, and the bottom of piston rod is sleeved in the stopper rod hole and also can moves up and down; Piston spring is sleeved on the piston rod, and the upper end of piston spring holds out against on the lower surface of piston head, and the lower end of piston spring is fixedly mounted on the annular snap platform;
The packing element baffling device is that single packing element intercepts tube coupling, packing element intercepts tube coupling and comprises the joint that builds the pressure, under the joint that builds the pressure, upper urceolus, lower urceolus, parent tube and obstruct packing element, on build the pressure joint and the lower inside that builds the pressure joint build the pressure on having respectively tube chamber and under the tube chamber that builds the pressure, on build the pressure joint and the lower outside that builds the pressure joint be intervally distributed with respectively the axial diversion groove, form flow guiding dummy club between two adjacent axial diversion grooves, the top of parent tube is fixedly mounted in the tube chamber that builds the pressure by screw thread, the bottom of parent tube is fixedly mounted on down in the tube chamber that builds the pressure by screw thread, on build the pressure the joint the bottom upper annular snap platform is arranged and is fixedly connected with urceolus, build the pressure down the joint top lower annular snap platform is arranged and is fixedly connected with lower urceolus, form every the cylinder annular space between the upper end of the lower end of upper urceolus and lower urceolus, form upper packing element annular space between upper outer tube inner wall and the parent tube external wall of upper portion, form the lower rubber cylinder annular space between lower outer tube inner wall and the parent tube bottom outer wall, the top that intercepts packing element is installed in the packing element annular space, the bottom that intercepts packing element is installed in the lower rubber cylinder annular space, the middle part that intercepts packing element is installed in the cylinder annular space also can expand laterally, the upper end that intercepts packing element with on build the pressure and form the chamber that builds the pressure between the lower end of joint, intercept the lower end and the lower chamber that builds the pressure under the formation between the upper end of saving that builds the pressure of packing element; On build the pressure and have and be no less than one upper joint fluid course in the body of joint, on build the pressure the joint the upper surface on the top connection screw is arranged and is installed with union, the lower end of top connection screw is connected with upper joint fluid course upper end, upper joint fluid course lower end with on the chamber that builds the pressure be connected; Building the pressure down has and is no less than one lower joint fluid course in the body of joint, build the pressure down the joint the lower surface on the lower contact screw is arranged and is installed with lower pipe connection, the inner chamber of lower pipe connection is connected by pipeline with the inner chamber of suppressing union, the upper end of lower contact screw is connected with lower joint fluid course lower end, lower joint fluid course upper end with under the chamber that builds the pressure be connected; Perhaps,
The packing element baffling device is to be no less than two packing element obstruct tube coupling and to be no less than one splicing sleeve; Packing element intercepts tube coupling and comprises the joint that builds the pressure, under the joint that builds the pressure, upper urceolus, lower urceolus, parent tube and obstruct packing element, on build the pressure joint and the lower inside that builds the pressure joint build the pressure on having respectively tube chamber and under the tube chamber that builds the pressure, on build the pressure joint and the lower outside that builds the pressure joint be intervally distributed with respectively the axial diversion groove, form flow guiding dummy club between two adjacent axial diversion grooves, the top of parent tube is fixedly mounted in the tube chamber that builds the pressure by screw thread, the bottom of parent tube is fixedly mounted on down in the tube chamber that builds the pressure by screw thread, on build the pressure the joint the bottom upper annular snap platform is arranged and is fixedly connected with urceolus, build the pressure down the joint top lower annular snap platform is arranged and is fixedly connected with lower urceolus, form every the cylinder annular space between the upper end of the lower end of upper urceolus and lower urceolus, form upper packing element annular space between upper outer tube inner wall and the parent tube external wall of upper portion, form the lower rubber cylinder annular space between lower outer tube inner wall and the parent tube bottom outer wall, the top that intercepts packing element is installed in the packing element annular space, the bottom that intercepts packing element is installed in the lower rubber cylinder annular space, the middle part that intercepts packing element is installed in the cylinder annular space also can expand laterally, the upper end that intercepts packing element with on build the pressure and form the chamber that builds the pressure between the lower end of joint, intercept the lower end and the lower chamber that builds the pressure under the formation between the upper end of saving that builds the pressure of packing element; On build the pressure and have and be no less than one upper joint fluid course in the body of joint, on build the pressure the joint the upper surface on the top connection screw is arranged and is installed with union, the lower end of top connection screw is connected with upper joint fluid course upper end, upper joint fluid course lower end with on the chamber that builds the pressure be connected; Building the pressure down has and is no less than one lower joint fluid course in the body of joint, and the lower contact screw is arranged and be installed with lower pipe connection on the lower surface of the lower joint that builds the pressure,
The upper end of lower contact screw is connected with lower joint fluid course lower end, lower joint fluid course upper end with under the chamber that builds the pressure be connected; Two adjacent packing elements intercept tube coupling and are serially connected by splicing sleeve, the packing element that is positioned at the below intercept tube coupling on build the pressure joint on the tube chamber of tube chamber by splicing sleeve that build the pressure be connected with the lower lower tube chamber that builds the pressure that saves that builds the pressure that the packing element that is positioned at the top intercepts tube coupling, the inner chamber that the packing element that is positioned at the below intercepts the upper union of tube coupling is connected by pipeline with the inner chamber that the packing element that is positioned at the top intercepts the lower pipe connection of tube coupling, and being positioned at, the inner chamber of the lower pipe connection of the packing element obstruct tube coupling of below is connected by pipeline with the inner chamber of suppressing union.
2.
Underbalanced well completion tool according to claim 1 is characterized in that ball-and-seat comprises spool, valve spring and gear cap; The outer end of suppressing the liquid hole is connected with the inner of single current valve opening by the little single current taper hole in large the inner, outer end, and the gear cap is fixed on the external port of single current valve opening and keeps sealing, and there is the valve rod blind hole at the inner center of gear cap; Spool comprises valve head and valve rod, the inner of valve rod and the outer end of valve head are connected as a single entity, valve head is sleeved on also can be along single current valve opening move left and right in the single current valve opening, the outer end of valve rod is sleeved on also can be along valve rod blind hole move left and right in the valve rod blind hole, be hemispheric valve head the inner and hold out against on the inwall of single current taper hole and can keep sealing, have outside the middle part of valve head to be no less than one and can be communicated with the single current taper hole and the intake chute in the hole that axially builds the pressure; Be set with valve spring on the valve rod, the inner of valve spring holds out against on the outer face of valve head, and the outer end of valve spring holds out against on the inner face of gear cap.
3.
Underbalanced well completion tool according to claim 1 and 2, it is characterized in that the joint fluid course comprises nodal axisn to inlet opening, upper nodal axisn to fluid hole and upper pitch diameter to the liquid hole; Upper nodal axisn is to the body bottom of the joint that builds the pressure on inlet opening is positioned at, upper nodal axisn be positioned to the lower end import of inlet opening on the lower surface of upper annular snap platform and with on the chamber that builds the pressure be connected, upper nodal axisn is to the body internal upper part of the joint that builds the pressure on fluid hole is positioned at, upper nodal axisn is connected with top connection screw lower end to the upper end outlet of fluid hole, upper pitch diameter is positioned at the body middle part of the joint that builds the pressure to the liquid hole, upper pitch diameter is connected with the upper end of upper nodal axisn to inlet opening to the inner in liquid hole, upper pitch diameter is connected with the lower end of upper nodal axisn to fluid hole to the middle part in liquid hole, on build the pressure corresponding upper pitch diameter on the flow guiding dummy club lateral surface of joint to the outer end position in liquid hole the upper plug head screw is arranged, the inner of upper plug head screw is connected with the outer end of upper pitch diameter to the liquid hole by little upper pitch cone hole, large the inner, outer end, be installed with the middle part in the upper plug head screw with externally threaded upper plug head, there are six square toes the outer end of upper plug head, there is hemispheric seal head the inner of upper plug head, and seal head holds out against on the inwall in upper pitch cone hole and can keep sealing; Lower joint fluid course comprise lower nodal axisn to inlet opening, lower nodal axisn to fluid hole and lower pitch diameter to the liquid hole; Lower nodal axisn is positioned at the body bottom of the lower joint that builds the pressure to inlet opening, lower nodal axisn is connected with lower contact screw upper end to the lower end import of inlet opening, lower nodal axisn is positioned at the body internal upper part of the lower joint that builds the pressure to fluid hole, lower nodal axisn be positioned to the outlet of the upper end of fluid hole on the upper surface of lower annular snap platform and with under the chamber that builds the pressure be connected, lower pitch diameter is positioned at the body middle part of the lower joint that builds the pressure to the liquid hole, lower pitch diameter is connected with the lower end of lower nodal axisn to fluid hole to the inner in liquid hole, lower pitch diameter is connected with the upper end of lower nodal axisn to inlet opening to the middle part in liquid hole, the corresponding lower pitch diameter on the flow guiding dummy club lateral surface of joint of building the pressure down has the lower end cap screw to the outer end position in liquid hole, the inner of lower end cap screw is connected with the outer end of lower pitch diameter to the liquid hole by little lower pitch cone hole, large the inner, outer end, be installed with the middle part in the lower end cap screw with externally threaded lower end cap, there are six square toes the outer end of lower end cap, there is hemispheric seal head the inner of lower end cap, and seal head holds out against on the inwall in lower pitch cone hole and can keep sealing.
4.
Underbalanced well completion tool according to claim 3, corresponding lower nodal axisn has back pressure fluid injection screw radially and is installed with back pressure fluid injection joint to the medium position of fluid hole on the flow guiding dummy club lateral surface of the joint that builds the pressure under it is characterized in that; The inner of back pressure fluid injection screw is connected with the middle part of lower nodal axisn to fluid hole by the little back pressure fluid injection taper hole in large the inner, outer end, there is external screw thread in the outside, middle part of back pressure fluid injection joint and is fixedly mounted on the back pressure fluid injection screw, there are six square toes in the external screw thread outside of back pressure fluid injection joint, there is hemispheric seal head the inner of back pressure fluid injection joint, seal head holds out against on the inwall of back pressure fluid injection taper hole and can keep sealing, there are axial back pressure liquid injection hole and back pressure liquid injection hole radially in the inside of back pressure fluid injection joint, radially the external port of back pressure liquid injection hole is on the outer wall between the external screw thread of seal head and back pressure fluid injection joint, radially the inner port of back pressure liquid injection hole is connected with the axial inner port of back pressure liquid injection hole, and axially the external port of back pressure liquid injection hole is positioned on the outer face of back pressure fluid injection joint and saves the outside and be connected with lower building the pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010260027 CN101906949B (en) | 2010-08-23 | 2010-08-23 | Underbalanced well completion tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010260027 CN101906949B (en) | 2010-08-23 | 2010-08-23 | Underbalanced well completion tool |
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| Publication Number | Publication Date |
|---|---|
| CN101906949A CN101906949A (en) | 2010-12-08 |
| CN101906949B true CN101906949B (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010260027 Active CN101906949B (en) | 2010-08-23 | 2010-08-23 | Underbalanced well completion tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102094591A (en) * | 2011-03-15 | 2011-06-15 | 东营市兆鑫工贸有限责任公司 | Fracturing packer for barefoot well |
| CN102094592A (en) * | 2011-03-15 | 2011-06-15 | 东营市兆鑫工贸有限责任公司 | Open hole well packer |
| CN110593830A (en) * | 2019-09-05 | 2019-12-20 | 威海丰泰新材料科技股份有限公司 | Separate-layer water injection device for water injection well of oil field |
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| US4934460A (en) * | 1989-04-28 | 1990-06-19 | Baker Hughes Incorporated | Pressure compensating apparatus and method for chemical treatment of subterranean well bores |
| CN2931768Y (en) * | 2006-07-03 | 2007-08-08 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Small diameter water plugging packer |
| CN201159064Y (en) * | 2008-02-29 | 2008-12-03 | 大庆油田有限责任公司 | Minor diameter expanding type washable well zonal injection packer |
| RU2347062C1 (en) * | 2007-10-16 | 2009-02-20 | Общество с ограниченной ответственностью "Лифт Ойл" | Packer |
| CN201771467U (en) * | 2010-08-23 | 2011-03-23 | 中国石油集团西部钻探工程有限公司 | Under-balance well completion tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4246964A (en) * | 1979-07-12 | 1981-01-27 | Halliburton Company | Down hole pump and testing apparatus |
| US4934460A (en) * | 1989-04-28 | 1990-06-19 | Baker Hughes Incorporated | Pressure compensating apparatus and method for chemical treatment of subterranean well bores |
| CN2931768Y (en) * | 2006-07-03 | 2007-08-08 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Small diameter water plugging packer |
| RU2347062C1 (en) * | 2007-10-16 | 2009-02-20 | Общество с ограниченной ответственностью "Лифт Ойл" | Packer |
| CN201159064Y (en) * | 2008-02-29 | 2008-12-03 | 大庆油田有限责任公司 | Minor diameter expanding type washable well zonal injection packer |
| CN201771467U (en) * | 2010-08-23 | 2011-03-23 | 中国石油集团西部钻探工程有限公司 | Under-balance well completion tool |
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| CN101906949A (en) | 2010-12-08 |
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