CN201695978U - Expansion pipe assembly and oil well repair construction mechanism provided with same - Google Patents
Expansion pipe assembly and oil well repair construction mechanism provided with same Download PDFInfo
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- CN201695978U CN201695978U CN2010291660272U CN201029166027U CN201695978U CN 201695978 U CN201695978 U CN 201695978U CN 2010291660272 U CN2010291660272 U CN 2010291660272U CN 201029166027 U CN201029166027 U CN 201029166027U CN 201695978 U CN201695978 U CN 201695978U
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Abstract
The utility model discloses an expansion pipe assembly and an oil well repair construction mechanism provided with the same. The expansion pipe assembly comprises an expansion pipe, an expansion cone, a center rod and a power cylinder, the expansion cone is mounted on the center rod, the power cylinder comprises a cylinder barrel and a piston, a piston rod of the piston is respectively in slidable fit with the upper end and the lower end of the cylinder barrel, a piston body of the piston is mounted on the piston rod and matches with the inner wall surface of the cylinder barrel, a first pressure cavity and a second pressure cavity are formed in the cylinder barrel, the center rod is connected with the lower end of the piston rod, the expansion pipe is sleeved outside the center rod and located between the cylinder barrel and the expansion cone, the piston is provided with a pressurizing passage, and the cylinder barrel is provided with a pressure release hole. Compared with an existing expansion pipe assembly, the expansion pipe assembly does not have a pre-expansion portion bearing high pressure, can lead the expansion pipe to be thinner, increases the largest diameter of the expansion cone, leads repaired positions to have larger drift diameter, and reduces influence of repair construction to oil wells.
Description
Technical field
The utility model relates to a kind of oil well subsidy technology, and particularly a kind of expansion tube assembly also relates to the oil well subsidy construction mechanism with this expansion tube assembly.
Background technology
The oil well subsidy technology is to utilize expansion tube assembly that basic sleeve pipe impaired in the oil well is repaired, to keep the technology of oil well sealing performance.Please refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of expansion tube assembly in the prior art, and Fig. 2 is the structural representation of expansion tube in the expansion tube assembly shown in Figure 1.Below the contrast accompanying drawing describes prior art oil well subsidy technology.
Existing expansion tube assembly comprises central tube 210, expansion tube 220, expansion cone 230, plug 240 and rubber sleeve 250.Expansion tube 220 comprises two parts, the one, not dilation 221 and dilation 222 in advance, pre-dilation 222 internal diameters and external diameter are respectively greater than the not internal diameter and the external diameter (in the presents, unless stated otherwise, described internal diameter, external diameter are diameter) of dilation 221.Expansion cone 230 is positioned at the not upper end position of pre-dilation 222.Plug 240 is fixed with pre-dilation 222 bottoms, and the lower end closed of pre-dilation 222 inner chambers not, formation expansion chamber 201 between plug 240 upper surfaces and expansion cone 240 lower surfaces.Central tube 210 passes not dilation 221, and the lower end links to each other with the upper end of expansion cone 230 by suitable mechanism; The center of central tube 210 has through flow hole 211, and through flow hole 211 is communicated with expansion chamber 201 by the interstitial hole of expansion cone 230.Rubber sleeve 250 is enclosed within the not external surface of dilation 221 of expansion tube 220.For the convenience of describing, show the impaired place 101 of basic sleeve pipe 100 and basic sleeve pipe 100 among the figure with double dot dash line.
The process of utilizing existing expansion tube assembly that basic sleeve pipe 100 is repaired is as follows:
The first step, the location is located in position expansion tube assembly, and is relative with the impaired place 101 of basic sleeve pipe 100.According to geologic data, determine the degree of depth at basic sleeve pipe 100 impaired places 101, to determine the subsidy position of expansion tube assembly; Select the expansion tube assembly of suitable types.The upper end that makes central tube 210 is fixed with delivering tubing string, delivers tubing string and is formed by external upset (EU) formula oil pipe, with the conveying high-pressure slurry, and expansion cone 230 is applied the predetermined power that lifts.Transfer the delivery tubing string, make expansion tube assembly be lowered to correct position in the basic sleeve pipe 100, so that the impaired place 101 of expansion tube 220 and basic sleeve pipe 100 adapts.
Second step, pressurization, expand tube.Please refer to Fig. 3, this figure is the operating principle schematic diagram of expansion tube assembly among Fig. 1.Delivery tubing string external tapping is communicated with the pressurization mouth of booster station, and high-pressure slurry arrives expansion chambers 201 by the through flow hole 211 of delivering tubing string, central tube 210, forms the expansion high pressure in expansion chamber 201; The pressure that forms in the expansion chamber 201 is approximately 40MPa, and this pressure roughly is equivalent to 400 standard atmospheric pressures, moves up to promote expansion cone 230.Because plug 240 is fixed together with expansion tube 220, shown in arrow among Fig. 3, the expansion high pressure moves up expansion cone 230 for the thrust of the lower end generation of expansion cone 230.Because the maximum gauge of expansion cone 230 is greater than dilation 221 internal diameters not, in expansion cone 230 up processes, the inner conical surface that its male cone (strobilus masculinus) can be by expansion tube 220 makes not dilation 221 radial dilatation to the expansionary force that dilation 221 not produces radially; Like this, in expansion cone 230 moves up process, make not dilation 221 overall radial expansion of expansion tube 220, form expansion segment.The maximum gauge of the internal diameter of expansion segment and expansion cone 230 is suitable substantially; Simultaneously, the inwall of the outer wall of expansion segment and basic sleeve pipe 100 fits, and makes expansion tube 220 be fixed on 101 places, impaired place of basic sleeve pipe 100.The expand tube process finishes, and trips out to deliver tubing string, central tube 210 and expansion cone 230, and expansion tube 220 becomes one with basic sleeve pipe 100, realizes the reparation to basic sleeve pipe 100.In the expand tube process, rubber sleeve 250 is compressed, to fill up the interval between expansion segment external diameter and basic sleeve pipe 100 internal diameters, keep the sealing between expansion tube 220 and the basic sleeve pipe 100, and between expansion tube 220 and basic sleeve pipe 100, produce predetermined suspension force; Described suspension force be expansion tube the vertical active force that can bear, have predetermined suspension force, expansion tube just can keep fixing with basic sleeve pipe when bearing predetermined vertical active force, and the sealing between maintenance and the basic sleeve pipe.
The 3rd step was lowered to the milling tubing string in the expansion tube 220 after expanding, and plug milling is bottom fallen, and expansion tube 220 lower ends are communicated with the basic sleeve pipe 100 of below.
The 4th step, utilize shaping tool that mouth is repaiied in the expansion tube upper end, oil well subsidy construction is finished.Last in the expand tube process, move past in the journey moving on expansion tube 220 on the expansion cone 230, the male cone (strobilus masculinus) of expansion cone 230 applies corresponding active force to the inner conical surface of expansion tube 220, and the stress that makes expansion tube 220 reaches the yield point of its material, make expansion tube 220 produce plastic strain, keep predetermined shape to make expansion tube 220 after finishing at expand tube; But the distortion of expansion tube 220 upper ends is positioned at the end point of expand tube process, and the distortion that this part produces is understood some and is elastic deformation; Therefore, when expansion cone 230 and expansion tube 220 were separated, the elastic deformation of its upper end can be recovered, and made expansion tube 220 upper end branches produce the necking section of internal diameter less than other parts.The purpose of repairing mouth is necking section is removed.
Though utilize existing expansion tube assembly can realize reparation to basic sleeve pipe 100, finish subsidy to oil well, excessive to the adverse effect of the follow-up work of oil well; Reason is as follows:
On the one hand, for ease of transferring of expansion tube assembly, the external diameter of the pre-dilation 222 of expansion tube is definite according to basic sleeve pipe 100 internal diameters, and less than predetermined value; Simultaneously, expansion tube 220 will have suitable anti-extrusion, anti-shear ability and yield strength, anti-extrusion, anti-shear ability can make dilation 222 bear the pressure effect of high-pressure slurry, suitable yield strength can make not that dilation 221 produces plastic strain under the predetermined force effect, makes expansion tube carry out radial dilatation; Owing to expansion chamber changes along with moving on the expansion cone 230, therefore, expansion segment after the radial dilatation and pre-dilation 222 should have preset thickness, the too small pressure effect that then is difficult to bear high-pressure slurry of thickness.
On the other hand, the pressure of high-pressure slurry also acts on the plug 240 simultaneously, in order to keep having reliable intensity between plug 240 and the pre-dilation 222, need between plug 240 and the pre-dilation 222 by screw thread link to each other (i.e. the suitable screw thread of processing on the inwall of pre-dilation 222 and plug 240, the thickness of pre-dilation 222 can't satisfy weld needs); In order to satisfy the needs of machining screw, also to make pre-dilation 222 have preset thickness, with the convenience of assurance screw thread processing and the reliability of screwed connection.
Above-mentioned two aspects all require pre-dilation 222 to have predetermined thickness, just be less than a predetermined value with the maximum gauge of pre-dilation 222 corresponding expansion cone 230, thereby expansion segment had predetermined internal diameter after subsidy was finished, and this pre-determined inner diameter has formed very big restriction to the subsequent job of oil well.Below be 5 of 7.72mm with the wall thickness
1/
2" basic sleeve pipe is that example is carried out labor.
The external diameter 139.7mm of above-mentioned basic sleeve pipe, internal diameter are 124.3mm.When this basis sleeve pipe 100 was carried out subsidy construction, the external diameter of the pre-dilation 222 of the expansion tube 220 of employing should be not more than 118, so that the transferring of expansion tube assembly.The wall thickness of pre-dilation 222 should be not less than 5mm, to satisfy the needs that bear pressure; Like this, the maximum gauge of expansion cone 230 should be not more than 108mm.After carrying out expand tube with above-mentioned expansion tube assembly, the internal diameter of expansion segment is approximately 108mm.Behind the subsidy construction, the internal diameter of subsidy position is reduced to 108mm from original 124.3mm, reduces about 16mm, and the amplitude of reducing is 12.87% of an original internal diameter.
Because the latus rectum that is lowered to by the oil well subsidy position of oil well subsequent production instrument determines that this position latus rectum reduces to influence the external diameter that is lowered to the tool of production in the oil well significantly.Such as, when carrying out oil producing operation, will use the less oil extraction pump of external diameter, this just causes the production capacity of this oil well to reduce; Equally, when carrying out other operations, will adopt the less instrument of external diameter, this just causes adverse effect to the well construction efficiency of operation, increases the difficulty of underground work.
How after finishing subsidy construction, reducing the influence to the latus rectum of oil well, is a technical barrier of current this technical field.
The utility model content
Therefore, first purpose of the present utility model is, a kind of expansion tube assembly is provided, to reduce behind the subsidy construction influence to the oil well latus rectum.
Providing on the basis of above-mentioned expansion tube assembly, second purpose of the present utility model is, a kind of oil well subsidy construction mechanism is provided.
In order to realize above-mentioned first purpose, the expansion tube assembly that the utility model provides comprises expansion tube and expansion cone, and difference with the prior art is, also comprises center-pole and power cylinder, and described expansion cone is installed on the center-pole; Described power cylinder comprises cylinder barrel and piston, and the piston rod of described piston slidably cooperates with the bottom of cylinder barrel; The piston body of described piston is installed on the piston rod, and matches with the internal face of described cylinder barrel, forms first pressure chamber in cylinder barrel; Described center-pole upper end links to each other with the lower end of piston rod; Described expansion tube is enclosed within outside the center-pole, and between the male cone (strobilus masculinus) of the lower surface of described cylinder barrel and expansion cone; Described piston has and is communicated with the pressurization passageway that first pressure chamber, opening are positioned at the upper surface of described piston rod.
Preferably, described expansion tube upper surface and cylinder barrel lower surface form the contact surface that parallels with horizontal plane.
Preferably, described expansion tube lower end has inner conical surface, and the male cone (strobilus masculinus) of described inner conical surface and expansion cone fits.
Preferably, described expansion tube assembly also comprises by center line being the thread set rise pipe joint together and the following adjustable pipe of vertical line; Described adjustable pipe down is bearing in the upper end of described expansion tube, and described adjusted piping support is in the lower end of described cylinder barrel.
Preferably, described expansion cone and center-pole are fixed.
Preferably, described expansion tube assembly also comprises card extension detent mechanism, and described expansion cone is enclosed within on the center-pole slidably; When described center-pole moves up with respect to expansion tube, described card is hung detent mechanism can be with described expansion cone and center-pole locking, when described center-pole moved down with respect to expansion tube, described card extension detent mechanism can be removed the locking between expansion cone and the center-pole.
Preferably, described card is hung detent mechanism and is comprised slips overcoat, slip insert sheet, spring and slips base, and described slips overcoat and expansion cone are fixed, and are enclosed within outside the center-pole; Described slip insert sheet is the wedge of lower end size greater than its upper end size; The outer inclined-plane of described slip insert sheet matches with the inner conical surface of described slips overcoat, internal face have downward-sloping stretch out and with the contacted ratchet of described center-pole; Described both ends of the spring is bearing in the lower surface of slip insert sheet and the upper surface of slips base respectively, and described slips base and slips overcoat are fixed.
Optionally, described card is hung detent mechanism and is comprised slips and at least one movable ratchet, and described slips and expansion cone are fixed, and are enclosed within outside the center-pole; Described movable ratchet upper end is hinged with slips, and the lower end depends on downward-sloping the stretching out with described center-pole of elastic component and contacts.
In order to realize above-mentioned second purpose, the oil well subsidy construction mechanism that the utility model provides comprises the delivery tubing string, also comprise above-mentioned any expansion tube assembly, described delivery pipe lower end and described cylinder barrel are fixed, described delivery tubing string also comprises pressure pipeline, described pressure pipeline outer end communicates with the high-pressure mouth of pumping plant, and the inner communicates with the opening of the pressurization passageway of the upper surface that is positioned at described piston rod.
Optionally, described delivery tubing string is oil pipe or drilling rod.
When the expansion tube assembly that utilizes the utility model to provide carries out subsidy construction, can in first pressure chamber, form high pressure, piston is applied predetermined active force, piston is moved up with respect to cylinder barrel by pressurization passageway; Piston drives expansion cone by center-pole and moves up with respect to expansion tube, makes the expansion tube radial dilatation, realizes the applying between expansion tube outside wall surface and the basic internal surface of sleeve pipe face, and expansion tube and basic sleeve pipe are fixed together; Further, can make the predetermined portions of expansion tube carry out radial dilatation, also can apply pulling force to expansion cone and make expansion tube integral body carry out radial dilatation by the delivery tubing string by constantly piston being applied active force.Compared with prior art, owing in the expansion tube assembly, do not have the pre-dilation that bears high pressure, expansion tube can not bear the pressure effect of high-pressure slurry, therefore can make expansion tube have less thickness, and then can increase the maximum gauge of expansion cone; After expansion is finished, can make expansion tube have bigger internal diameter, make the subsidy position have bigger latus rectum, reduce the influence of subsidy construction to the oil well latus rectum, realize the purpose of this utility model.
In further technical scheme, described expansion tube upper surface and cylinder barrel lower surface form the contact surface that parallels with horizontal plane.In the expand tube process, this technical scheme can increase the contact area between expansion tube and the cylinder barrel, reduces the stress of expansion tube upper end, reduces the distortion that expansion tube produces owing to the active force that bears cylinder barrel.
In further technical scheme, described expansion tube lower end has the inner conical surface that the male cone (strobilus masculinus) with expansion cone fits; This technical scheme can increase the stability of expansion tube assembly on the one hand, and in the time of can reducing to begin expand tube on the other hand, the stress that expansion tube produces makes the expand tube process more smooth.
In further technical scheme, described expansion tube assembly also comprises governor motion, and described governor motion comprises that the center line of described screw thread is a vertical line by thread set rise pipe joint together and following adjustable pipe; Like this, rotate described rise pipe joint or down adjustable pipe just can change distance between governor motion upper surface and the lower surface, make upper surface and lower surface apply certain active force to cylinder barrel and expansion tube respectively, make expansion tube keep stable, avoid transferring in the expansion tube assembly process, expansion tube produces deflection.
In further optional technical scheme, expansion cone and center-pole are fixed, can simplify the structure of expansion tube assembly.
In another optimal technical scheme, also comprise card extension detent mechanism, described expansion cone is enclosed within on the center-pole slidably; When described center-pole moves up with respect to expansion tube, described card is hung detent mechanism can make center-pole and expansion cone keep relative fixed, at this moment described expansion cone and center-pole locking, piston moves up by center-pole pulling expansion cone, makes the appropriate section radial dilatation of expansion tube; When described center-pole moved down with respect to expansion tube, described card was hung detent mechanism and is removed locking between expansion cone and the center-pole, and when center-pole moved down with piston, it is motionless that expansion cone keeps, and moves up prerequisite is provided for spurring expansion cone again; The expansion tube assembly that utilizes this technical scheme to provide can make the radial dilatation of carrying out of expansion tube predetermined portions by reciprocating motion repeatedly; The length of power cylinder not only can be reduced like this, the reliability of subsidy construction operation can also be improved.
In further technical scheme, described expansion tube outside wall surface also has rubber coating, and the material of described rubber coating has predetermined component.Transfer in the process at expansion tube assembly, rubber coating can be maintained fixed with expansion tube, thereby avoids the disappearance of expansion tube outside wall surface rubber layer, sealing between expansion tube and the basic sleeve pipe behind the assurance subsidy construction, the reliability that hangs.In addition, in the rubber coating predetermined component determined that this coating has that highly dense covering property, waterproof are antirust, good characteristics such as acid-fast alkali-proof, heat-resisting cold-resistant, elastic wear-resisting, asepsis environment-protecting.
Providing on the basis of above-mentioned expansion tube assembly, the oil well subsidy construction mechanism that the utility model provides comprises above-mentioned any expansion tube assembly and delivers tubing string, cylinder barrel in described delivery tubing string lower end and the expansion tube assembly is fixed, thereby expansion tube assembly can be transferred to preposition, and can after construction is finished, the miscellaneous part except that expansion tube in the expansion tube assembly be pulled out from oil well; Simultaneously, deliver tubing string and also comprise pressure pipeline, described pressure pipeline outer end communicates with the high-pressure mouth of pumping plant, and the inner communicates with the opening of the pressurization passageway of the upper surface that is positioned at piston rod, like this, and can be by delivering tubing string to described first pressure chamber pressurization.
Further in the optimal technical scheme, described delivery tubing string can be drilling rod, forms with drilling rod and delivers tubing string, can conveniently deliver the formation of tubing string on the one hand, improves the efficient of oil well subsidy construction; On the other hand, drilling rod has higher intensity, expansion tube at predetermined length is expanded, expansion tube and basic pipe box are fixed, and have after the predetermined suspension force, can spur expansion cone by drilling rod and move up, finish the expand tube process, thereby improve the subsidy construction efficiency of operation significantly.
Description of drawings
Fig. 1 is the structural representation of expansion tube assembly in the prior art;
Fig. 2 is the structural representation of expansion tube in the expansion tube assembly shown in Figure 1;
Fig. 3 is the operating principle schematic diagram of expansion tube assembly among Fig. 1;
Fig. 4 is the structural representation of the expansion tube assembly that provides of the utility model embodiment one;
Fig. 5 is the operating principle schematic diagram of expansion tube assembly shown in Fig. 4;
Fig. 6 is a kind of structural representation of governor motion;
Fig. 7 is the process schematic diagram that expansion tube assembly that Application Example one provides carries out oil well subsidy construction, also is the flow chart of first kind of oil well subsidy construction method providing of the utility model;
Fig. 8 is the structural representation of the expansion tube assembly that provides of the utility model embodiment two;
Fig. 9 is the structural representation that I-I partly amplifies among Fig. 8;
Figure 10 is the process schematic diagram that the expansion tube assembly that utilizes embodiment two to provide carries out oil well subsidy construction, also is the flow chart of second kind of oil well subsidy construction method providing of the utility model;
Figure 11 is the structural representation that another kind of card is hung detent mechanism;
Figure 12 is the flow chart of the third oil well subsidy construction method of providing of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail, the description of this part only is exemplary and explanatory, should any restriction not arranged to protection domain of the present utility model.Should be noted that in the presents, described upper and lower duty with expansion tube assembly serves as that the basis is determined in order to have described convenience.
Please examine Fig. 4, this figure is the structural representation of the expansion tube assembly that provides of the utility model embodiment one.For the convenience of describing, also show basic sleeve pipe 100 among the figure.
The expansion tube assembly that embodiment one provides comprises expansion tube 410, expansion cone 420 and center-pole 430; Expansion cone 420 is installed on the center-pole 430, can move up at upper and lower with center-pole 430.In addition, expansion tube assembly also comprises power cylinder 440, and power cylinder 440 comprises piston 441 and cylinder barrel 442, wherein, the piston rod of piston 441 connects cylinder barrel 442, and slidably cooperates respectively with the upper end and the bottom of cylinder barrel 442, forms predetermined space between cylinder barrel 442 and the piston rod thereby make; The piston body of piston 441 is installed on the piston rod, match with the internal face of cylinder barrel 442, predetermined space between cylinder barrel 442 and the piston rod is divided into two parts, and formation first pressure chamber 443 and second pressure chamber, 444, the first pressure chambers 443 are positioned at second pressure chamber, 444 belows in cylinder barrel 442.
Piston 441 also is provided with and is communicated with the pressurization passageway of upper surface that first pressure chamber 443 and opening are positioned at the piston rod of piston 441.Pressurization passageway can have multiple concrete structure, and in this example, pressurization passageway is formed by the centre bore 4411 of piston rod and the pressurization hole 4412 of the connection centre bore 4411 and first pressure chamber 443.Simultaneously, cylinder barrel 442 also is provided with pressure relief vent 4421, and pressure relief vent 4421 is communicated with the space outerpace of second pressure chamber 444 and cylinder barrel 442.Like this, can be by this pressurization passageway to 443 pressurizations of first pressure chamber, second pressure chamber 444 can pass through pressure relief vent 4421 releases simultaneously; When forming predetermined pressure in first pressure chamber 443, piston 441 moves up under the pressure differential effect between first pressure chamber 443 and second pressure chamber 444.In order to keep the sealing performance of power cylinder 440, can also be at piston body and cylinder barrel 442 inwalls, the cooperation place at piston rod and cylinder barrel 442 both ends is provided with the suitable seal ring respectively.
The limit inferior position of moving for positioning piston 441, be provided with locating surface down in the piston rod upper end, be provided with locating surface up in cylinder barrel 442 upper ends, locating surface down and locating surface up be inconsistent can stop piston 441 with respect to cylinder barrel 442 to lower slider, make piston 441 can remain on predetermined limit inferior position.
The piston-rod lower end of center-pole 430 upper ends and piston 441 is fixed.Expansion tube 410 is enclosed within outside the center-pole 430, and between the male cone (strobilus masculinus) of the lower surface of cylinder barrel 442 and expansion cone 420, be that the male cone (strobilus masculinus) with the lower surface of cylinder barrel 442 and expansion cone 420 is relative respectively for upper surface and the lower surface of expansion tube 410, preferably, make the upper surface of expansion tube 410 and lower surface inconsistent with the male cone (strobilus masculinus) of the lower surface of cylinder barrel 442 and expansion cone 420 respectively, thereby keep expansion tube 410 and expansion cone 420 relative fixed.For the ease of regulating suitable distance between cylinder barrel 442 lower surfaces and expansion cone 420 male cone (strobilus masculinus)s,, can make between the lower end of center-pole 430 upper ends and the piston rod of piston 441 to link to each other by screw thread to hold expansion tube 410; By center of rotation bar 430, just can change the distance between cylinder barrel 442 and the expansion cone 420; In this example, also be provided with nut 421, by nut 421 expansion cone 420 be fixed on the center-pole 430, adjusting nut 420 also can change the distance between cylinder barrel 442 and the expansion cone 420; In addition, can also make between expansion cone 420 and the center-pole 430 directly to link to each other, also can realize adjusting the purpose of distance between cylinder barrel 442 and the expansion cone 420 by screw thread.
Please refer to Fig. 5, this figure is the operating principle schematic diagram of expansion tube assembly shown in Fig. 4.Under pressure differential effect between first pressure chamber 443 and second pressure chamber 444, piston 441 can spur expansion cone 420 by center-pole 430 and move up with respect to expansion tube 410, under the effect of expansion cone 420 male cone (strobilus masculinus)s, expansion tube 410 begins radial dilatation from the lower end, produce extruding between the internal face of outside wall surface and basic sleeve pipe 100, expansion tube 410 and basic sleeve pipe 100 are fixed together.
In order to enlarge the accommodation of expansion tube assembly, guarantee the reliability of expansion tube assembly, can also between cylinder barrel 442 lower ends and expansion tube 410 upper ends, governor motion be set.Please refer to Fig. 6, this figure is a kind of structural representation of governor motion, governor motion 450 comprises that raising pipe joint 451 and following adjustable pipe 452 is vertical extension tubular structure by thread set rise pipe joint 451 and following adjustable pipe 452 together, and the center line of screw thread is a vertical line between the two; Rotation rise pipe joint 451 or following adjustable pipe 452 just can change the distance between governor motion upper surface and the lower surface, make upper surface and lower surface apply certain active force to cylinder barrel 442 and expansion tube 410 respectively, make expansion tube 410 keep stable, avoid expansion tube assembly to transfer in the process, expansion tube 410 produces deflection, improves the reliability of expansion tube assembly.
Please refer to Fig. 7, this figure is the process schematic diagram that expansion tube assembly that Application Example one provides carries out oil well subsidy construction, also is the flow chart of first kind of oil well subsidy construction method providing of the utility model.The first kind of oil well subsidy construction method that provides may further comprise the steps:
S100 will put into the preposition of basic sleeve pipe 100 under the expansion tube assembly.By suitable delivery tubing string 500 expansion tube assembly is located in position, and makes expansion tube 410 relative with the impaired place 101 of basic sleeve pipe 100.Delivering tubing string 500 (there is shown its end portion) can be that oil pipe forms, and also can be formed by drilling rod, and make expansion tube assembly and deliver tubing string 500 linking to each other by rights.
S200 makes first pressure chamber produce predetermined pressure, and piston 441 drives center-pole 430 and expansion cone 420 moves up with respect to expansion tube 410, makes the predetermined portions radial dilatation of expansion tube 410.
The capstan of delivering in the tubing string 500 is communicated with the pressurization mouth of booster station (not shown), high-pressure slurry arrives first pressure chamber 443 by the capstan of delivering tubing string 500, the pressurization passageway of piston 441, second pressure chamber 444 is by the pressure relief vent release, cylinder barrel 442 keeps motionless, and piston 441 moves up; Piston 441 drives expansion cone 420 and moves up with respect to expansion tube 410, and expansion cone 420 makes expansion tube 410 radial dilatation, and expansion tube 410 outside wall surface are pushed mutually with basic sleeve pipe 100 internal faces; On expansion cone 420, move suitable distance, after the expansion tube 410 predetermined portions radial dilatation, can realize reparation, guarantee that the subsidy section of oil well has predetermined sealing performance, satisfy the needs that recover the oil or carry out other operations basic sleeve pipe 100.
The predetermined portions of expansion tube 410 can be determined according to actual needs, in this example, predetermined portions is to determine according to the needs that basic sleeve pipe 100 is repaired, and predetermined portions should make expansion segment the impaired place of basic sleeve pipe 100 can be covered, and can satisfy the needs that oil well seals and expansion tube hangs.Can obtain under the predetermined state length of predetermined portions by test.
S300 utilizes milling tool to mill not radial dilatation part of expansion tube 410, and this step can utilize milling tool of the prior art to carry out.
In this example, deliver tubing string 500 and link to each other, therefore, need the piston rod of piston 441 to connect cylinder barrel 442, and slidably cooperate respectively, and in cylinder barrel 442, form first pressure chamber 443 and second pressure chamber 444 with the upper end and the bottom of cylinder barrel 442 with cylinder barrel 442.When delivery tubing string 500 links to each other with the piston rod of piston 441, also can make second pressure chamber 444 be hatch frame, piston 441 piston rods only are slidingly matched with the cylinder barrel lower part, can form pressure differential equally, and driven plunger 441 moves up.
Compared with prior art, in the expansion tube assembly that the utility model provides, there is not the pre-dilation that bears high pressure in expansion tube 410, and expansion tube 410 can not bear the high pressure effect, therefore, can make expansion tube 410 have less thickness, thereby can increase the maximum gauge of expansion cone 420; Like this, after finishing expand tube, can make expansion tube 410 have bigger internal diameter.Below with to 5
1/
2" basic sleeve pipe reparation is that example is elaborated.
The background technology part states a kind of 5
1/
2" the external diameter 139.7mm of basic sleeve pipe, internal diameter are 124.3mm.When the expansion tube assembly that utilizes the utility model embodiment one to provide was repaired this basis sleeve pipe 100, can adopt wall thickness was the expansion tube 410 of 5mm, and the external diameter of expansion tube 410 can remain 118mm, to make things convenient for transferring of expansion tube assembly; The maximum outside diameter of expansion cone 420 can be 114mm, and after subsidy construction was finished, the internal diameter of subsidy position can reach 114mm, and the latus rectum of this position reduces about 10mm, and the amplitude of reducing is 8% of an original internal diameter.Like this, compare, after expand tube is finished, just can reduce the influence of subsidy construction, realize the purpose of this utility model the oil well latus rectum with of the prior art 12.87%.
Description according to the background technology part, according to the size Selection expansion tube assembly of basic sleeve pipe 100 time, the critical size that needs to determine comprises: the wall thickness of the external diameter of pre-dilation 222, pre-dilation 222, not internal diameter, the external diameter of dilation 221 not of dilation 221.Because the expansion tube 410 in the expansion tube assembly that the utility model provides does not comprise not dilation, comprises two critical sizes of external diameter and internal diameter; Therefore, when selecting expansion tube 410,, just can determine suitable expansion tube 410 according to the external diameter and the wall thickness of expansion tube 410 according to basic sleeve pipe 100.And then the expansion tube assembly that utilizes the utility model to provide carries out the selection that the subsidy construction operation not only can make things convenient for expansion tube, improves the subsidy construction efficiency of operation; Can also select a kind of expansion tube to combine, improve the scope of application of expansion tube, obtain expansion tube assembly easily with more kinds of expansion cone.Please refer to shown in the following table.
On expressed 5
1/
2" the basic sleeve pipe of series, and the relative dimensions of expansion tube corresponding 410 and expansion cone 420 with it.As can be seen from the above table, 5
1/
2" in 12 dimension serieses of basic sleeve pipe, the external diameter of supporting with it expansion tube 410 can reduce to 4 kinds, and 4 kinds of expansion tube 410 wall thickness unanimities, just can realize reparation to basic sleeve pipe 100 by the expansion cone 420 of selecting different maximum gauges; So just enlarged the scope of application of expansion tube 410; Further, can reduce needs, make things convenient for the manufacturing of expansion tube assembly, reduce manufacturing cost significantly, and help full-scale these rowization of expansion tube assembly expansion tube 410 kinds.By that analogy, for 5
3/
4", 6
5/
8", 7 ", 9
5/
8" etc. the system-based sleeve pipe, the still less kind expansion tube that can adopt is repaired.
When the expansion tube assembly that provides according to embodiment one carries out subsidy construction, make the expansion tube 410 of predetermined length carry out radial dilatation, will make the piston 441 of power cylinder 440 preset distance that moves up, and then the length of needs increase power cylinder 440, make expansion tube assembly have bigger overall length; For subsidy construction, the overall length of expansion tube assembly directly influences the convenience and the efficient of subsidy construction operation, carries out subsidy construction for convenience under oil well, and the utility model embodiment two also provides another kind of expansion tube assembly.
Please refer to Fig. 8, this figure is the structural representation of the expansion tube assembly that provides of the utility model embodiment two.The difference of the expansion tube assembly that provides with embodiment one is that the card that also comprises of the expansion tube assembly that embodiment two provides is hung detent mechanism 460, hangs detent mechanism 460 with card and connects expansion cone 420 and center-poles 430.As shown in the figure, card is hung detent mechanism 460 and is comprised slips overcoat 461, slip insert sheet 462, spring 463 and slips base 464, and slips overcoat 461 is fixing with expansion cone 420, and is enclosed within outside the center-pole 430, inside has an inner conical surface, and inner conical surface and center-pole 430 side faces form the space of ring-type; Slip insert sheet 462 is the wedge of lower end size greater than its upper end size; The outer inclined-plane of slip insert sheet 462 matches with the inner conical surface of slips overcoat 461, and the internal face of slip insert sheet 462 has the downward-sloping ratchet that stretches out 4621, and as shown in Figure 9, this figure is the structural representation that I-I partly amplifies among Fig. 8.A plurality of slip insert sheets 462 are uniformly distributed in inner conical surface and center-pole 430 side faces form in the space of ring-type; Slips base 464 is enclosed within outside the center-pole 430, and fixes with slips overcoat 461 lower ends, and spring 463 two ends are bearing in the upper surface of slip insert sheet 462 lower surfaces and slips base 464 respectively, keeps the supporting to slip insert sheet 462.For convenience of the decrement of regulating spring 463, slips base 464 links to each other with slips overcoat 461 lower ends by screw thread, like this, just can adjust the decrement of spring 463 by rotation slips base 464.Certainly, in a lateral direction, the overall size of card extension detent mechanism 460 should be slightly smaller than the maximum outside diameter of expansion cone 420, and after finishing with convenient expansion, card is hung detent mechanism 460 taking-ups.
The operating principle that described card is hung detent mechanism 460 is: the supporting that spring 463 keeps slip insert sheet 462, slip insert sheet 462 keep under the inner conical surface effect of slips overcoat 461 and the contacting of center-pole 430; When center-pole 430 moves up with respect to expansion tube 410, the 462 downward-sloping ratchet that stretches out 4621 lockings of slip insert sheet are also held center-pole 430 tightly, make expansion cone 420 and center-pole 430 keep locking also to move up synchronously, described locking is to instigate center-pole 430 and expansion cone 420 to be maintained fixed, and moves up so that center-pole 430 drives expansion cone 420; Expansion cone 420 moves up with respect to expansion tube 410, makes a part of radial dilatation of the lower end of expansion tube 410, and expansion tube 410 pushes mutually with basic sleeve pipe 100, and expansion tube 410 is fixed with basic sleeve pipe 100; When center-pole 430 moved down, expansion tube 410 was maintained fixed with basic sleeve pipe 100, and expansion cone 420 keeps relative fixed with expansion tube 410; Slip insert sheet 462 keeps sliding-contact with center-pole 430, removes the locking between center-pole 430 and the expansion cone 420, and described unlocking is that center-pole 430 can be moved down with respect to expansion cone 420.Then, center-pole 430 is moved up with respect to expansion tube 410, the ratchet 4621 of slip insert sheet 462 is held center-pole 430 once more tightly, and expansion cone 420 moves up with respect to expansion tube 410, makes another part radial dilatation of expansion tube 410; Like this,, can make the predetermined portions of expansion tube 410 carry out radial dilatation, finish reparation basic sleeve pipe 100 by a plurality of circulations.
The concrete mode that center-pole 430 is moved up is identical with embodiment one, can realize by first pressure chamber 443 being applied high pressure; Center-pole 430 is moved down, and piston 441 that can be by making power cylinder 440 and center-pole 430 are being delivered under tubing string 500 actions of gravity to moving down, also can be by to delivering the mode that tubing string 500 applies predetermined force center-pole 430 being moved down.Because the expand tube process finishes by a plurality of circulations, the less distance that piston 441 is moved on each, thus make power cylinder 440 keep less length, reduce the overall length of expansion tube assembly, the convenient subsidy construction that under oil well, carries out.
As shown in figure 10, this figure is the process schematic diagram that the expansion tube assembly that utilizes embodiment two to provide carries out oil well subsidy construction, also is the flow chart of second kind of oil well subsidy construction method providing of the utility model; Different with first kind of this oil well subsidy construction method, in this oil well subsidy construction method, described step S200 can comprise:
S210 makes first pressure chamber 443 produce predetermined pressure, and piston 441 drives center-pole 430 and expansion cone 420 moves up with respect to cylinder barrel 442 and expansion tube 410, makes a part of radial dilatation of expansion tube 410.The length of radial dilatation is consistent with piston 441 stroke in cylinder barrel 442.
S211 judges whether the predetermined portions of described expansion tube finishes radial dilatation, if then enter step S300; If not, then enter step S220.The oil well subsidy construction method that determine and the embodiment one of predetermined portions provide is identical.
S220 reduces first pressure chamber, 443 pressure, and center-pole 430 moves down with respect to expansion cone 420, returns step S210.
Carry out above-mentioned steps repeatedly, just can make expansion tube 410 predetermined portions radial dilatation, reach the purpose of repairing basic sleeve pipe 100.Wherein, step S211 is not limited to carry out after step S210, also can carry out after step S220.
Description according to embodiment two, be appreciated that, card is hung the said structure that is not limited to of detent mechanism 460, according to technology instruction of the present utility model, those skilled in the art can be provided with the ratchet that tilts to protrude upward on center-pole 430, and make ratchet relative with slip insert sheet 462 internal faces, and the ratchet that tilts to protrude upward perhaps is set on center-pole 430, on slip insert sheet 462, be provided with simultaneously and be tilted to the ratchet that stretches out down; Can also make center-pole 430 comprise mechanisms such as slip insert sheet, spring, and the ratchet that tilts to protrude upward is set, also can realize the purpose of this utility model at the slip insert sheet.
In addition, card is hung detent mechanism and also is not limited to hold power tightly by the slip insert sheet increase of wedge shape, and as shown in figure 11, this figure is the structural representation that another kind of card is hung detent mechanism.This card is hung detent mechanism 460 and is comprised slips 466 and at least one movable ratchet 467, slips 466 and expansion cone 420 relative fixed, and be enclosed within outside the center-pole 430; Movable ratchet 467 upper ends and slips 466 are hinged, and the lower end depends on elastic component 468 downward-sloping stretching out with center-pole 430 and contacts.When center-pole 430 moved up, movable ratchet 467 also can be held center-pole 430 tightly, made expansion cone 420 and center-pole 430 keep relative fixed; When center-pole 430 moved down, movable ratchet 467 upper ends kept separating with center-pole 430, and center-pole 430. is moved down with respect to expansion tube 410, realize the shuttling movement of center-pole 430, reach the purpose of this utility model.Certainly, also movable ratchet 467 can be installed on the center-pole 430, and it be inclined upwardly stretch out, also can realize above-mentioned purpose.
In the above-mentioned oil well subsidy construction method that provides, driving expansion cone 420 by power cylinder 410 moves up, final expansion tube 410 has appropriate section can't radial dilatation, therefore, also need to mill the not radial dilatation part on top at last with milling tool, this just makes that the oil well subsidy construction method is more loaded down with trivial details, based on above-mentioned expansion tube assembly, can also make expansion tube integral body carry out radial dilatation by delivering tubing string 500.
Please refer to Figure 12, this figure is the flow chart of the third oil well subsidy construction method of providing of the utility model.This method may further comprise the steps:
S100 will put into the preposition of basic sleeve pipe 100 under the expansion tube assembly.This step is identical with corresponding step in first kind of oil well subsidy construction method that the utility model provides
S200 makes first pressure chamber 443 produce predetermined pressure, and piston 441 drives center-pole 430 and expansion cone 420 moves up with respect to expansion tube 410, makes the predetermined portions radial dilatation of expansion tube 410.Different with the foregoing description, in this example, predetermined portions is determined according to the needs that produce suspension force between expansion tube 410 and the basic sleeve pipe 100, the condition that the predetermined suspension force that produces between expansion tube 410 and basic sleeve pipe 100 need satisfy is: in next step, when delivering tubing string 500 pulling expansion cone 420 and moving up, can keep relative fixed between expansion tube 410 and the basic sleeve pipe 100.Can obtain under the different situations by test, produce the length that predetermined suspension force needs, thereby need determine the predetermined portions of radial dilatation.
Make the predetermined portions radial dilatation of expansion tube 410 that different selections can be arranged, when the expansion tube assembly that the expansion tube that utilizes always provides for embodiment one, can move up once, make expansion tube 410 radial dilatation of predetermined portions by expansion cone 420; When the expansion tube assembly that the expansion tube assembly that utilizes provides for embodiment two, also can be by the predetermined portions radial dilatation that back and forth makes expansion tube 410 repeatedly, step corresponding in detailed process and the second kind of oil well subsidy construction method that the utility model provides is identical.
S200-1: apply active force to delivering tubing string 500, delivery tubing string 500 pulling expansion cone 420 are moved up with respect to expansion tube 410, make other part radial dilatation of expansion tube 410.
S300-1 utilizes milling tool to mill the necking section on expansion tube 410 tops.This step can be same as the prior art.
In addition, also can make expansion cone 420 have suitable length, and expansion cone 420 is extracted out from expansion tube 410 upper ends with suitable speed,, like this, just can save step with the milling tool milling to avoid the appearance of expansion tube 410 upper end necking sections.Like this, not only do not need mill pin plug, also do not need to repair mouth, can improve the operating efficiency of subsidy construction significantly; Owing to do not leave any junk down in the oil well, can avoid down the influence of junk to subsequent job, guarantee after oil well subsidy construction is finished the carrying out smoothly of subsequent job.
After guaranteeing that expand tube is finished, the sealing performance between expansion tube 410 and the basic sleeve pipe 100 can be provided with suitable rubber sleeve outside expansion tube 410, to remedy the gap between expansion tube 410 and the basic sleeve pipe 100.When transferring expansion tube assembly, rubber sleeve since with the anti-landing of the friction of basic sleeve pipe 100, the utility model has also been done further improvement to expansion tube 410.At first be rubber coating to be set, thereby prevent in transferring process that rubber layer separates with expansion tube 410 in expansion tube 410 outside wall surface; Secondly, in order to improve the performance of rubber coating, also the composition of rubber coating is handled, the material that forms described rubber coating comprises: 62%～95% sizing; 0.05%～9.5% acrylamide; 3.75%～34.2% comprehensive auxiliary agent; Sizing comprises following one or more components: natural rubber, neoprene, acrylonitrile-butadiene rubber and butadiene-styrene rubber, comprehensive auxiliary agent comprises following one or more components: crosslinking agent, accelerator, zinc oxide, plasticizing agent, softening agent, homogenizing agent, tackifier and age resistor and rubber filling oil.Determine that by ground experiment the elastomeric material elasticity of described component can reach 30% or higher, satisfies the requirement of expansion tube 15% with interior expansion rate fully.This material also is being with conspicuous characteristics aspect sour corrosion, and under 3% hydrochloric environment, corrosion rate is 0.072mm/ week, satisfies the oil field fully for erosion-resisting requirement.This elastomeric material has well remedied the microscopic voids between expansion tube expansion back and the original sleeve pipe, experimental check, annular space sealing after original sleeve pipe and expansion tube expand has reached 37Mpa pressure, satisfies the requirement of oil field for subsidy back annular space sealing fully.
Based on above-mentioned expansion tube assembly, the oil well subsidy construction mechanism that provides is except comprising above-mentioned expansion tube assembly, also comprise and deliver tubing string 500,500 lower ends are managed in described delivery and described cylinder barrel is fixed, described delivery tubing string 500 also comprises pressure pipeline, described pressure pipeline outer end communicates with the high-pressure mouth of pumping plant, and the inner communicates with the opening of the pressurization passageway of the upper surface that is positioned at piston rod.
Delivering tubing string 500 can be same as the prior art, promptly can form with oil pipe, also can form with drilling rod.When oil pipe forms delivery tubing string 500, can form with external upset tubing and deliver tubing string 500, in order to guarantee the sealing performance of external upset tubing junction, in connection procedure, connecting sealing place can smear suitable seal fat or the material that other strengthen sealing performance is set, in order to guarantee sealing reliability, preferred artificial the connection.The efficient that connects artificial connection in view of oil pipe is lower, in the oil well subsidy construction mechanism that the utility model provides, preferably forms with drilling rod and delivers tubing string 500; Compare with external upset tubing, the drilling rod of two or predetermined quantity can be formed a group, the drilling rod with respective sets connects again, like this, can save greatly and is connected to form the time of delivering tubing string 500, improves the efficient of oil well subsidy construction; Simultaneously, drilling rod has higher intensity, can satisfy the pulling expansion cone and move up, and finishes the needs of expand tube process.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, for example, the overall size of each several part can be selected according to the needs of practical function; successfully to pass in and out basic sleeve pipe, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. an expansion tube assembly comprises expansion tube and expansion cone, it is characterized in that, also comprises center-pole and power cylinder, and described expansion cone is installed on the center-pole; Described power cylinder comprises cylinder barrel and piston, and the piston rod of described piston slidably cooperates with the bottom of cylinder barrel; The piston body of described piston is installed on the piston rod, and matches with the internal face of described cylinder barrel, forms first pressure chamber in cylinder barrel; Described center-pole upper end links to each other with the lower end of piston rod; Described expansion tube is enclosed within outside the center-pole, and between the male cone (strobilus masculinus) of the lower surface of described cylinder barrel and expansion cone; Described piston has and is communicated with the pressurization passageway that first pressure chamber, opening are positioned at the upper surface of described piston rod.
2. expansion tube assembly according to claim 1 is characterized in that, described expansion tube upper surface and cylinder barrel lower surface form the contact surface that parallels with horizontal plane.
3. expansion tube assembly according to claim 1 is characterized in that, described expansion tube lower end has inner conical surface, and the male cone (strobilus masculinus) of described inner conical surface and expansion cone fits.
4. expansion tube assembly according to claim 1 is characterized in that, also comprises by center line being the thread set rise pipe joint together and the following adjustable pipe of vertical line; Described adjustable pipe down is bearing in the upper end of described expansion tube, and described adjusted piping support is in the lower end of described cylinder barrel.
5. according to each described expansion tube assembly of claim 1-4, it is characterized in that described expansion cone and center-pole are fixed.
6. according to each described expansion tube assembly of claim 1-4, it is characterized in that also comprise card extension detent mechanism, described expansion cone is enclosed within on the center-pole slidably; When described center-pole moves up with respect to expansion tube, described card is hung detent mechanism can be with described expansion cone and center-pole locking, when described center-pole moved down with respect to expansion tube, described card extension detent mechanism can be removed the locking between expansion cone and the center-pole.
7. expansion tube assembly according to claim 6 is characterized in that, described card is hung detent mechanism and comprised slips overcoat, slip insert sheet, spring and slips base, and described slips overcoat and expansion cone are fixed, and are enclosed within outside the center-pole; Described slip insert sheet is the wedge of lower end size greater than its upper end size; The outer inclined-plane of described slip insert sheet matches with the inner conical surface of described slips overcoat, internal face have downward-sloping stretch out and with the contacted ratchet of described center-pole; Described both ends of the spring is bearing in the lower surface of slip insert sheet and the upper surface of slips base respectively, and described slips base and slips overcoat are fixed.
8. expansion tube assembly according to claim 6 is characterized in that, described card is hung detent mechanism and comprised slips and at least one movable ratchet, and described slips and expansion cone are fixed, and are enclosed within outside the center-pole; Described movable ratchet upper end is hinged with slips, and the lower end depends on downward-sloping the stretching out with described center-pole of elastic component and contacts.
9. oil well subsidy construction mechanism, comprise the delivery tubing string, it is characterized in that, also comprise each described expansion tube assembly among the claim 1-8, described delivery pipe lower end and described cylinder barrel are fixed, described delivery tubing string also comprises pressure pipeline, and described pressure pipeline outer end communicates with the high-pressure mouth of pumping plant, and the inner communicates with the opening of the pressurization passageway of the upper surface that is positioned at described piston rod.
10. oil well subsidy construction mechanism according to claim 9 is characterized in that, described delivery tubing string is oil pipe or drilling rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010291660272U CN201695978U (en) | 2010-02-03 | 2010-02-03 | Expansion pipe assembly and oil well repair construction mechanism provided with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010291660272U CN201695978U (en) | 2010-02-03 | 2010-02-03 | Expansion pipe assembly and oil well repair construction mechanism provided with same |
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| Publication Number | Publication Date |
|---|---|
| CN201695978U true CN201695978U (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010291660272U Expired - Lifetime CN201695978U (en) | 2010-02-03 | 2010-02-03 | Expansion pipe assembly and oil well repair construction mechanism provided with same |
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| CN (1) | CN201695978U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153735A (en) * | 2014-07-24 | 2014-11-19 | 中国石油天然气股份有限公司 | Expansion pipe repairing device |
| CN106703746A (en) * | 2016-12-19 | 2017-05-24 | 中国石油集团渤海钻探工程有限公司 | Expansion-type degradable bridge plug |
| CN109538149A (en) * | 2018-11-01 | 2019-03-29 | 中国石油集团渤海钻探工程有限公司 | A kind of easy unjaming thin-walled big orifice expandable casing patching device |
| CN111791457A (en) * | 2020-09-09 | 2020-10-20 | 东营鑫华莲石油机械有限公司 | External packer for casing |
| CN114135244A (en) * | 2021-11-30 | 2022-03-04 | 西南石油大学 | Hydraulic variable-level expansion tool for plugging while drilling and process method |
-
2010
- 2010-02-03 CN CN2010291660272U patent/CN201695978U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153735A (en) * | 2014-07-24 | 2014-11-19 | 中国石油天然气股份有限公司 | Expansion pipe repairing device |
| CN106703746A (en) * | 2016-12-19 | 2017-05-24 | 中国石油集团渤海钻探工程有限公司 | Expansion-type degradable bridge plug |
| CN106703746B (en) * | 2016-12-19 | 2022-06-10 | 中国石油天然气集团有限公司 | Expansion type degradable bridge plug |
| CN109538149A (en) * | 2018-11-01 | 2019-03-29 | 中国石油集团渤海钻探工程有限公司 | A kind of easy unjaming thin-walled big orifice expandable casing patching device |
| CN109538149B (en) * | 2018-11-01 | 2021-06-08 | 中国石油集团渤海钻探工程有限公司 | Easy-to-release thin-wall large-drift-diameter expansion pipe patching device |
| CN111791457A (en) * | 2020-09-09 | 2020-10-20 | 东营鑫华莲石油机械有限公司 | External packer for casing |
| CN114135244A (en) * | 2021-11-30 | 2022-03-04 | 西南石油大学 | Hydraulic variable-level expansion tool for plugging while drilling and process method |
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