CN101812980B - Expansion tube assembly, oil well subsidy construction mechanism and construction method - Google Patents

Expansion tube assembly, oil well subsidy construction mechanism and construction method Download PDF

Info

Publication number
CN101812980B
CN101812980B CN 201010106783 CN201010106783A CN101812980B CN 101812980 B CN101812980 B CN 101812980B CN 201010106783 CN201010106783 CN 201010106783 CN 201010106783 A CN201010106783 A CN 201010106783A CN 101812980 B CN101812980 B CN 101812980B
Authority
CN
China
Prior art keywords
expansion tube
expansion
center
pole
cone
Prior art date
Application number
CN 201010106783
Other languages
Chinese (zh)
Other versions
CN101812980A (en
Inventor
谭延君
Original Assignee
华鼎鸿基石油工程技术(北京)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华鼎鸿基石油工程技术(北京)有限公司 filed Critical 华鼎鸿基石油工程技术(北京)有限公司
Priority to CN 201010106783 priority Critical patent/CN101812980B/en
Publication of CN101812980A publication Critical patent/CN101812980A/en
Application granted granted Critical
Publication of CN101812980B publication Critical patent/CN101812980B/en

Links

Abstract

The invention discloses an expansion tube assembly, an oil well subsidy construction mechanism with the expansion tube assembly, and an oil well subsidy construction method. The disclosed expansion tube assembly comprises an expansion tube, an expansion cone, a central rod and a power cylinder, wherein the expansion cone is installed on the central rod; the power cylinder comprises a cylinder barrel and a piston; the piston rod of the piston can be respectively in sliding fit with the upper end part and the lower end part of the cylinder barrel; the piston body of the piston is installed on the piston rod and is matched with the inner wall surface of the cylinder barrel; a first pressure chamber and a second pressure chamber are formed in the cylinder barrel; the central rod is connected with the lower end of the piston rod; the expansion tube is sleeved outside the central rod and is positioned between the cylinder barrel and the expansion cone; the piston is provided with a pressurization channel; and the cylinder barrel is provided with a pressure relief vent. Compared with the existing expansion tube assembly, the expansion tube assembly disclosed by the invention does not have a pre-expansion part bearing high pressure, so that the expansion tube can have smaller thickness, the maximum diameter of the expansion cone is increased, the subsidy position has a larger drift diameter, and the influence of subsidy construction on an oil well is reduced.

Description

Expansion tube assembly, oil well subsidy construction mechanism and job practices

Technical field

The present invention relates to a kind of oil well subsidy technology, particularly a kind of expansion tube assembly, the oil well subsidy construction method that also relates to the oil well subsidy construction mechanism with this expansion tube assembly and utilize above-mentioned expansion tube assembly to carry out.

Background technology

The oil well subsidy technology is to utilize expansion tube assembly that basic sleeve pipe impaired in 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 prior art, and Fig. 2 is the structural representation of expansion tube in 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 not internal diameter and the external diameter (in 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 is connected 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 in 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 the impaired place 101 of basic sleeve pipe 100, to determine the subsidy position of expansion tube assembly; Select the expansion tube assembly of suitable types.The upper end of central tube 210 is fixed with delivering tubing string, delivered tubing string and formed by external upset (EU) formula oil pipe, with conveying high-pressure mud, 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 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 in 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, at the interior formation expansion of expansion chamber 201 high pressure; The pressure of expansion chamber 201 interior formation is approximately 40MPa, and this pressure roughly is equivalent to 400 standard atmospheric pressures, moves up to promote expansion cone 230.Because plug 240 and expansion tube 220 are fixed together, as shown by the arrows in Figure 3, the expansion high pressure moves up expansion cone 230 for the thrust of the lower end generation of expansion cone 230.Greater than dilation 221 internal diameters not, in the up process of expansion cone 230, 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 due to the maximum gauge of expansion cone 230; Like this, in expansion cone 230 moves up process, make not dilation 221 overall radial expansions of expansion tube 220, form expansion segment.The maximum gauge of the internal diameter of expansion segment and expansion cone 230 is substantially suitable; 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 basic sleeve pipe 100, and produce predetermined suspension force between expansion tube 220 and basic sleeve pipe 100; Described suspension force is the vertical active force that expansion tube can bear, and has predetermined suspension force, and expansion tube just can keep fixing with basic sleeve pipe when bearing predetermined vertical active force, and the sealing between maintenance and basic sleeve pipe.

The 3rd step was lowered to the milling tubing string in the expansion tube 220 after expand, 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 to repair mouth to the expansion tube upper end, oil well subsidy construction is completed.Last in the expand tube process, move past journey moving on expansion cone 230 on expansion tube 220, 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 completing 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 internal diameter less than the necking section of other parts.The purpose of repairing mouth is necking section is removed.

Although utilize existing expansion tube assembly can realize reparation to basic sleeve pipe 100, complete the 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-acting 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; Because expansion chamber changes along with moving on expansion cone 230, therefore, the expansion segment after radial dilatation and pre-dilation 222 should have predetermined thickness, the too small pressure-acting that is difficult to bear high-pressure slurry of thickness.

On the other hand, the pressure of high-pressure slurry also acts on plug 240 simultaneously, in order to keep having reliable intensity between plug 240 and pre-dilation 222, need between plug 240 and pre-dilation 222 by screw thread be connected (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 predetermined 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, the maximum gauge of the expansion cone 230 corresponding with pre-dilation 222 just is less than a predetermined value, thereby after subsidy is completed, expansion segment has predetermined internal diameter, and this predetermined inside diameter has formed very large restriction to the subsequent job of oil well.Below take wall thickness as 7.72mm 5 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.After subsidy construction, the internal diameter of subsidizing the position is reduced to 108mm from original 124.3mm, reduces about 16mm, and the amplitude of reducing is 12.87% of original internal diameter.

Because the latus rectum that is lowered to by the oil well subsidy position of oil well subsequent production instrument determines, this position latus rectum significantly reduces can impact to be lowered to the external diameter of the tool of production in oil well.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 efficient of well construction operation, increases the difficulty of underground work.

How after completing subsidy construction, reducing the impact on the latus rectum of oil well, is a technical barrier of current this technical field.

Summary of the invention

Therefore, first purpose of the present invention is, a kind of expansion tube assembly is provided, to reduce after subsidy construction the impact on the oil well latus rectum.

Providing on the basis of above-mentioned expansion tube, second purpose of the present invention is, a kind of oil well subsidy construction mechanism is provided.

The 3rd purpose is, a kind of oil well subsidy construction method of utilizing above-mentioned expansion tube assembly is provided.

In order to realize above-mentioned first purpose, expansion tube assembly provided by the invention 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 arranged on center-pole; Described power cylinder comprises cylinder barrel and piston, and the piston rod of described piston slidably coordinates with the cylinder barrel bottom; The piston body of described piston is arranged on piston rod, and matches with the internal face of described cylinder barrel, forms the first pressure chamber in cylinder barrel; Described center-pole upper end is connected with the lower end of piston rod, is connected by screw thread between the upper end of described center-pole and the lower end of described piston rod; Described expansion tube is enclosed within outside 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 the first pressure chamber, opening are positioned at the upper surface of described piston rod;

Between the lower end of described cylinder barrel and the upper end of described expansion tube, governor motion is set, described governor motion comprises rise pipe joint and lower adjustable pipe, between described rise pipe joint and described lower adjustable pipe by center line be vertical line thread set together, described lower adjustable pipe is bearing in the upper end of described expansion tube, and described adjusted piping support is in the lower end of described cylinder barrel;

The upper end of described piston rod is provided with locating surface down, and the upper end of described cylinder barrel is provided with locating surface up, and described locating surface and described up locating surface down is inconsistent.

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 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 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 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 center-pole; Described slip insert sheet is that the lower end size is greater than the wedge of 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 respectively the lower surface of slip insert sheet and the upper surface of slips base, 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 center-pole; Described movable ratchet upper end and slips are hinged, and the lower end depends on downward-sloping the stretching out with described center-pole of elastic component and contacts.

Preferably, described expansion tube outside wall surface also has rubber coating, and the material that forms described rubber coating comprises: 62% ~ 95% sizing; 0.05% ~ 9.5% acrylamide; 3.75% ~ 34.2% comprehensive auxiliary agent.

In order to realize above-mentioned second purpose, oil well subsidy construction mechanism provided by the invention 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.

In order to realize above-mentioned second purpose, a kind of oil well subsidy construction method provided by the invention comprises the following steps:

S100 will put into the precalculated position of basic sleeve pipe under expansion tube assembly;

S200 makes the first pressure chamber produce predetermined pressure, and piston driving center-pole and expansion cone move up with respect to described expansion tube, make the predetermined portions radial dilatation of described expansion tube.

In further technical scheme, described expansion tube assembly also comprises card extension detent mechanism, and described expansion cone is enclosed within on 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 center-pole; At this moment, in described oil well subsidy construction method, step S200 comprises:

S210 makes the first pressure chamber produce predetermined pressure, and piston driving center-pole and expansion cone move up with respect to expansion tube;

S220 reduces the pressure of the first pressure chamber, and center-pole moves down with respect to expansion cone, returns to step S210.

Optionally, after described step S200, also comprise step S200-1:

Pull described expansion cone to move up with respect to expansion tube by delivering tubing string, make other part radial dilatation of expansion tube.

When utilizing expansion tube assembly provided by the invention to carry out subsidy construction, can form high pressure in the first pressure chamber by pressurization passageway, piston is applied predetermined active force, piston is moved up with respect to cylinder barrel; 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 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 by constantly piston being applied active force, also can apply pulling force to expansion cone by the delivery tubing string and make expansion tube integral body carry out radial dilatation.Compared with prior art, in expansion tube assembly, do not have the pre-dilation that bears high pressure, expansion tube can not bear the pressure-acting 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 completed, can make expansion tube have larger internal diameter, make the subsidy position have larger latus rectum, reduce subsidy construction to the impact of oil well latus rectum, realize purpose of the present invention.

In further technical scheme, the contact surface that described expansion tube upper surface and cylinder barrel lower surface formation parallel with horizontal plane.In the expand tube process, this technical scheme can increase the contact area between expansion tube and cylinder barrel, reduces the stress of expansion tube upper end, reduces the distortion that expansion tube produces due 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 vertical line by thread set rise pipe joint and lower adjustable pipe together; Like this, rotate described rise pipe joint or lower adjustable pipe and just can change distance between governor motion upper surface and 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 center-pole slidably; When described center-pole moves up with respect to expansion tube, described card is hung detent mechanism can with described expansion cone and center-pole locking, make center-pole and expansion cone keep relative fixing, at this moment, piston pulls expansion cone to move up by center-pole, makes the appropriate section radial dilatation of expansion tube; When described center-pole moved down with respect to expansion tube, described card was hung the locking between detent mechanism releasing expansion cone and center-pole, and when center-pole moved down with piston, it is motionless that expansion cone keeps, and provides prerequisite for pulling again expansion cone to move up; The expansion tube assembly that utilizes this technical scheme to provide can by reciprocating motion repeatedly, make the radial dilatation of carrying out of expansion tube predetermined portions; 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 process at expansion tube assembly, rubber coating can keep fixing with expansion tube, thereby avoids the disappearance of expansion tube outside wall surface rubber layer, sealing between expansion tube and basic sleeve pipe after the assurance subsidy construction, the reliability that hangs.In addition, in rubber coating predetermined component determined that this coating has that highly dense covering property, waterproof are antirust, the 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, oil well subsidy construction mechanism provided by the invention comprises above-mentioned any expansion tube assembly and delivers tubing string, cylinder barrel in described delivery tubing string lower end and expansion tube assembly is fixed, thereby expansion tube assembly can be transferred to preposition, and can after construction is completed, the miscellaneous part except expansion tube in 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 opening of the pressurization passageway of inner and the upper surface that is positioned at piston rod communicates, and like this, can pressurize to described the first pressure chamber by the delivery tubing string.

Further in optimal technical scheme, described delivery tubing string can be drilling rod, forms with drilling rod and delivers tubing string, can conveniently deliver on the one hand the formation of tubing string, 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 after having predetermined suspension force, can pull expansion cone to move up by drilling rod, complete the expand tube process, thereby improve significantly the efficient of subsidy construction operation.

According to above-mentioned expansion tube assembly, the present invention also provides the method for oil well subsidy construction, corresponding with above-mentioned expansion tube assembly, utilize above-mentioned expansion tube assembly, after completing oil well subsidy construction, can make expansion tube have larger internal diameter, reduce subsidy construction to the impact of oil well latus rectum, realize purpose of the present invention.

Further in optimal technical scheme, after expansion tube and basic sleeve pipe are fixed, can also directly apply pulling force to expansion cone by drilling rod, complete the expand tube process, can improve like this efficient of oil well subsidy construction.

Description of drawings

Fig. 1 is the structural representation of expansion tube assembly in prior art;

Fig. 2 is the structural representation of expansion tube in expansion tube assembly shown in Figure 1;

Fig. 3 is the operating principle schematic diagram of expansion tube assembly in Fig. 1;

Fig. 4 is the structural representation of the expansion tube assembly that provides of the embodiment of the present invention one;

Fig. 5 is the operating principle schematic diagram of expansion tube assembly shown in Fig. 4;

Fig. 7 is the process schematic diagram that expansion tube assembly that Application Example one provides carries out oil well subsidy construction, is also the flow chart of the first oil well subsidy construction method provided by the invention;

Fig. 8 is the structural representation of the expansion tube assembly that provides of the embodiment of the present invention two;

Fig. 9 is the structural representation that in Fig. 8, I-I partly amplifies;

Figure 10 utilizes expansion tube assembly that embodiment two provides to carry out the process schematic diagram of oil well subsidy construction, is also the flow chart of the second oil well subsidy construction method provided by the invention;

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 provided by the invention.

The specific embodiment

Describe the present invention below in conjunction with accompanying drawing, the description of this part is only exemplary and explanatory, should any restriction not arranged to protection scope of the present invention.Should be noted that in presents, described upper and lower duty take expansion tube assembly is determined as the basis 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 embodiment of the present invention one.For the convenience of describing, also show basic sleeve pipe 100 in figure.

The expansion tube assembly that embodiment one provides comprises expansion tube 410, expansion cone 420 and center-pole 430; Expansion cone 420 is arranged on 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 coordinates respectively with upper end and the bottom of cylinder barrel 442, forms predetermined space between cylinder barrel 442 and piston rod thereby make; The piston body of piston 441 is arranged on piston rod, match with the internal face of cylinder barrel 442, predetermined space between cylinder barrel 442 and piston rod is divided into two parts, is positioned at the second pressure chamber 444 belows at interior formation the first pressure chamber 443 of cylinder barrel 442 and the second pressure chamber 444, the first pressure chambers 443.

Piston 441 also is provided with and is communicated with the pressurization passageway of upper surface that the 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 that is communicated with centre bore 4411 and the 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 the second pressure chamber 444 and cylinder barrel 442.Like this, can be to the first pressure chamber 443 pressurizations by this pressurization passageway, the second pressure chamber 444 can pass through pressure relief vent 4421 releases simultaneously; When forming predetermined pressure in the first pressure chamber 443, piston 441 moves up under the pressure differential effect between the first pressure chamber 443 and the 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 arranges respectively suitable joint ring.

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 with respect to cylinder barrel 442 down slidings, makes piston 441 can remain on predetermined limit inferior position with the inconsistent piston 441 that can stop of locating surface up.

The piston-rod lower end of center-pole 430 upper ends and piston 441 is fixed.Expansion tube 410 is enclosed within outside 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 relative with expansion cone 420 fixing.For the ease of regulating distance suitable between cylinder barrel 442 lower surfaces and expansion cone 420 male cone (strobilus masculinus)s, to hold expansion tube 410, can make between the lower end of center-pole 430 upper ends and the piston rod of piston 441 to be connected by screw thread; By center of rotation bar 430, just can change the distance between cylinder barrel 442 and expansion cone 420; In this example, also be provided with nut 421, by nut 421, expansion cone 420 be fixed on center-pole 430, adjusting nut 420 also can change the distance between cylinder barrel 442 and expansion cone 420; In addition, can also make between expansion cone 420 and center-pole 430 directly to be connected by screw thread, also can realize adjusting the purpose of distance between cylinder barrel 442 and expansion cone 420.

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 the first pressure chamber 443 and the second pressure chamber 444, piston 441 can pull expansion cone 420 to move up with respect to expansion tube 410 by center-pole 430, 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 by thread set rise pipe joint 451 and lower adjustable pipe 452 together, and raising pipe joint 451 and lower adjustable pipe 452 is vertical extension tubular structure, both between the center line of screw thread be vertical line; Rotation rise pipe joint 451 or lower adjustable pipe 452 just can change the distance between governor motion upper surface and 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 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, is also the flow chart of the first oil well subsidy construction method provided by the invention.The first oil well subsidy construction method that provides comprises the following steps:

S100 will put into the preposition of basic sleeve pipe 100 under 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.Deliver tubing string 500(and there is shown its end portion) can be that oil pipe forms, also can be formed by drilling rod, and make expansion tube assembly and deliver tubing string 500 being connected by rights.

S200 makes the 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 tubing string 500 is communicated with the pressurization mouth of booster station (not shown), high-pressure slurry arrives the first pressure chamber 443 by the capstan of delivering tubing string 500, the pressurization passageway of piston 441, the 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 and basic sleeve pipe 100 internal faces are pushed mutually; Move suitable distance on expansion cone 420, after expansion tube 410 predetermined portions radial dilatation, can realize the reparation to basic sleeve pipe 100, guarantee that the subsidy section of oil well has predetermined sealing performance, satisfy the needs that recover the oil or carry out other operations.

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 predetermined state the 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 be connected with cylinder barrel 442, therefore, need the piston rod of piston 441 to connect cylinder barrel 442, and slidably coordinate respectively with upper end and the bottom of cylinder barrel 442, and at interior formation the first pressure chamber 443 of cylinder barrel 442 and the second pressure chamber 444.When delivering tubing string 500 and be connected with the piston rod of piston 441, also can make the second pressure chamber 444 be hatch frame, piston 441 piston rods only with under cylinder barrel partly are slidably matched, and equally can mineralization pressure poor, driven plunger 441 moves up.

Compared with prior art, in expansion tube assembly provided by the invention, there is not the pre-dilation that bears high pressure in expansion tube 410, and expansion tube 410 can not bear High Pressure, therefore, can make expansion tube 410 have less thickness, thereby can increase the maximum gauge of expansion cone 420; Like this, after completing expand tube, can make expansion tube 410 have larger internal diameter.Below with to 5 1/ 2" basic casing repairing is that example is elaborated.

The background technology part is already described, and 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 embodiment of the present invention 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 facilitate transferring of expansion tube assembly; The maximum outside diameter of expansion cone 420 can be 114mm, and after subsidy construction was completed, the internal diameter of subsidizing the position can reach 114mm, and the latus rectum of this position reduces about 10mm, and the amplitude of reducing is 8% of original internal diameter.Like this, compare with of the prior art 12.87%, after expand tube is completed, just can reduce subsidy construction to the impact of oil well latus rectum, realize purpose of the present invention.

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 expansion tube assembly provided by the invention does not comprise not dilation, comprise two critical sizes of external diameter and internal diameter; Therefore, when selecting expansion tube 410 according to basic sleeve pipe 100, according to external diameter and the wall thickness of expansion tube 410, just can determine suitable expansion tube 410.And then, utilize expansion tube assembly provided by the invention to carry out the selection that the subsidy construction operation not only can facilitate expansion tube, improve the efficient of subsidy construction operation; Can also select a kind of expansion tube to combine with more kinds of expansion cone, improve the scope of application of expansion tube, obtain easily expansion tube assembly.Please refer to shown in following table.

On expressed 5 1/ 2" the basic sleeve pipe of series, and the expansion tube 410 corresponding with it and the relative dimensions of expansion cone 420.As can be seen from the above table, 5 1/ 2" in 12 dimension serieses of basic sleeve pipe, the external diameter of supporting expansion tube 410 can reduce to 4 kinds with it, and 4 kinds of expansion tube 410 wall thickness are consistent, 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 the needs to expansion tube 410 kinds, facilitate the manufacturing of expansion tube assembly, reduce significantly manufacturing cost, and be conducive to full-scale these rowization of expansion tube assembly.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 larger overall length; For subsidy construction, the overall length of expansion tube assembly directly affects convenience and the efficient of subsidy construction operation, carries out subsidy construction for convenient under oil well, and the embodiment of the present invention 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 embodiment of the present invention two.The difference of the expansion tube assembly that provides with embodiment one is, 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 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 that the lower end size is greater than the wedge of 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 in Fig. 8, I-I partly amplifies.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 center-pole 430, and fixes with slips overcoat 461 lower ends, and spring 463 two ends are bearing in respectively the upper surface of slip insert sheet 462 lower surfaces and slips base 464, keep the supporting to slip insert sheet 462.In order to facilitate the decrement of regulating spring 463, slips base 464 is connected 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 completing 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 downward-sloping ratchet that stretches out 4621 of slip insert sheet 462 locks and holds tightly center-pole 430, make expansion cone 420 keep locking and synchronizeing moving up with center-pole 430, described locking is to instigate center-pole 430 and expansion cone 420 to keep fixing, 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 fixing with basic sleeve pipe 100; When center-pole 430 moved down, expansion tube 410 kept fixing with basic sleeve pipe 100, and expansion cone 420 keeps relative fixing with expansion tube 410; , slip insert sheet 462 keeps sliding-contact with center-pole 430, removes the locking between center-pole 430 and expansion cone 420, and described unlocking is that center-pole 430 can be moved down with respect to expansion cone 420.Then, 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 again tightly, and expansion cone 420 moves up with respect to expansion tube 410, makes another part radial dilatation of expansion tube 410; Like this, by a plurality of circulations, can make the predetermined portions of expansion tube 410 carry out radial dilatation, complete the reparation to basic sleeve pipe 100.

The concrete mode that center-pole 430 is moved up is identical with embodiment one, can realize by the 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 also can move down center-pole 430 by the mode that applies predetermined force to delivering tubing string 500 delivering under tubing string 500 Action of Gravity Fields to moving down.Because the expand tube process is completed 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 carries out under oil well.

As shown in figure 10, this figure utilizes expansion tube assembly that embodiment two provides to carry out the process schematic diagram of oil well subsidy construction, is also the flow chart of the second oil well subsidy construction method provided by the invention; Different from this oil well subsidy construction method of the first, in this oil well subsidy construction method, described step S200 can comprise:

S210 makes the 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 at the interior stroke of cylinder barrel 442 with piston 441.

S211 judges whether the predetermined portions of described expansion tube completes radial dilatation, if so, enters step S300; If not, enter step S220.The oil well subsidy construction method that determine and the embodiment one of predetermined portions provide is identical.

S220 reduces the first pressure chamber 443 pressure, and center-pole 430 moves down with respect to expansion cone 420, returns to step S210.

Repeatedly carry out above-mentioned steps, 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 invention, those skilled in the art can arrange the ratchet that tilts to protrude upward on center-pole 430, and make ratchet relative with slip insert sheet 462 internal faces, the ratchet that tilts to protrude upward perhaps is set, the ratchet that stretches out simultaneously under setting on slip insert sheet 462 is tilted on center-pole 430; Can also make center-pole 430 comprise the mechanisms such as slip insert sheet, spring, and at the slip insert sheet, the ratchet that tilts to protrude upward is set, also can realize purpose of the present invention.

In addition, card is hung detent mechanism and also is not limited to increase enclasping force by the slip insert sheet 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, and slips 466 is relative with expansion cone 420 fixing, and is enclosed within outside center-pole 430; Movable ratchet 467 upper ends and slips 466 are hinged, and the lower end depends on downward-sloping the stretching out with center-pole 430 of elastic component 468 and contacts.When center-pole 430 moved up, movable ratchet 467 also can be held center-pole 430 tightly, made expansion cone 420 keep relative fixing with center-pole 430; 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 purpose of the present invention.Certainly, also movable ratchet 467 can be arranged on 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 at last to mill with milling tool the not radial dilatation part on top, this just makes the oil well subsidy construction method 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 provided by the invention.The method comprises the following steps:

S100 will put into the preposition of basic sleeve pipe 100 under expansion tube assembly.This step is identical with corresponding step in the first oil well subsidy construction method provided by the invention

S200 makes the 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 from above-described embodiment, in this example, predetermined portions is determined according to the needs that produce suspension force between expansion tube 410 and basic sleeve pipe 100, the condition that the predetermined suspension force that produces between expansion tube 410 and basic sleeve pipe 100 need to satisfy is: in next step, when delivering tubing string 500 and pulling expansion cone 420 to move up, can keep relative fixing between expansion tube 410 and basic sleeve pipe 100.Can obtain under 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 by expansion cone 420, make expansion tube 410 radial dilatation of predetermined portions; During the expansion tube assembly that provides for embodiment two at the expansion tube assembly that utilizes, 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 oil well subsidy construction method provided by the invention is identical.

S200-1: apply active force to delivering tubing string 500, make delivery tubing string 500 pull expansion cone 420 to move 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, to avoid the appearance of expansion tube 410 upper end necking sections, like this, just can save the step of use milling tool milling.Like this, not only do not need mill pin plug, also do not need to repair mouth, can improve significantly the operating efficiency of subsidy construction; Owing to not leaving any lower junk in oil well, can avoid lower junk on the impact of subsequent job, guarantee after oil well subsidy construction is completed the carrying out smoothly of subsequent job.

After guaranteeing that expand tube is completed, the sealing performance between expansion tube 410 and basic sleeve pipe 100 can arrange suitable rubber sleeve expansion tube 410 is outer, to make up the gap between expansion tube 410 and basic sleeve pipe 100.When transferring expansion tube assembly, rubber sleeve due to the anti-landing of the friction of basic sleeve pipe 100, the present invention has also done further improvement to expansion tube 410.At first be in expansion tube 410 outside wall surface, rubber coating to be set, thereby prevent in transferring process, rubber layer separates with expansion tube 410; Secondly, in order to improve the performance of rubber coating, also the composition of rubber coating is processed, 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 by ground experiment, the elastomeric material elasticity of described component can reach 30% or higher, satisfies expansion tube 15% fully with the requirement of interior expansion rate.This material is being also 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 made up expansion tube and has expanded afterwards and the microscopic voids between original sleeve pipe, experimental check, annular space sealing after original sleeve pipe and expansion tube expand has reached 37Mpa pressure, satisfies the oil field fully for the requirement of the rear annular space sealing of subsidy.

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, described delivery pipe 500 lower ends and described cylinder barrel are 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, namely 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 stop-leak compound 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 oil well subsidy construction mechanism provided by the invention, 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, then the drilling rod of respective sets is connected, like this, can greatly save the time of delivering tubing string 500 that is connected to form, improve the efficient of oil well subsidy construction; Simultaneously, drilling rod has higher intensity, can satisfy pulling expansion cone to move up, and completes the needs of expand tube process.

The above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention; 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 scope of the present invention.

Claims (13)

1. an expansion tube assembly, comprise expansion tube and expansion cone, it is characterized in that, also comprises center-pole and power cylinder, and described expansion cone is arranged on center-pole; Described power cylinder comprises cylinder barrel and piston, and the piston rod of described piston slidably coordinates with the cylinder barrel bottom; The piston body of described piston is arranged on piston rod, and matches with the internal face of described cylinder barrel, forms the first pressure chamber in cylinder barrel; Described center-pole upper end is connected with the lower end of piston rod, is connected by screw thread between the upper end of described center-pole and the lower end of described piston rod; Described expansion tube is enclosed within outside 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 the first pressure chamber, opening are positioned at the upper surface of described piston rod;
Between the lower end of described cylinder barrel and the upper end of described expansion tube, governor motion is set, described governor motion comprises rise pipe joint and lower adjustable pipe, between described rise pipe joint and described lower adjustable pipe by center line be vertical line thread set together, described lower adjustable pipe is bearing in the upper end of described expansion tube, and described adjusted piping support is in the lower end of described cylinder barrel;
The upper end of described piston rod is provided with locating surface down, and the upper end of described cylinder barrel is provided with locating surface up, and described locating surface and described up locating surface down is inconsistent.
2. expansion tube assembly according to claim 1, is characterized in that, the contact surface that described expansion tube upper surface and cylinder barrel lower surface formation parallel 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. according to claim 1-3 described expansion tube assemblies of any one, is characterized in that, described expansion cone and center-pole are fixed.
5. according to claim 1-3 described expansion tube assemblies of any one, is characterized in that, also comprises card extension detent mechanism, and described expansion cone is enclosed within on 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 center-pole.
6. expansion tube assembly according to claim 5, 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 center-pole; Described slip insert sheet is that the lower end size is greater than the wedge of 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 respectively the lower surface of slip insert sheet and the upper surface of slips base, and described slips base and slips overcoat are fixed.
7. expansion tube assembly according to claim 5, 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 center-pole; Described movable ratchet upper end and slips are hinged, and the lower end depends on downward-sloping the stretching out with described center-pole of elastic component and contacts.
8. the described expansion tube assembly of any one according to claim 1-3, is characterized in that, described expansion tube outside wall surface also has rubber coating, and the material that forms described rubber coating comprises: 62% ~ 95% sizing; 0.05% ~ 9.5% acrylamide; 3.75% ~ 34.2% comprehensive auxiliary agent.
9. oil well subsidy construction mechanism, comprise the delivery tubing string, it is characterized in that, also comprise the described expansion tube assembly of any one in claim 1-8, described delivery tubing string 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 opening of the pressurization passageway of inner and the upper surface that is positioned at described piston rod communicates.
10. oil well subsidy construction mechanism according to claim 9, is characterized in that, described delivery tubing string is oil pipe or drilling rod.
11. an oil well subsidy construction method is characterized in that, the method utilizes the described expansion tube assembly of claim 1 to 4 any one to carry out, and the method comprises the following steps:
S100 will put into the precalculated position of basic sleeve pipe under expansion tube assembly;
S200 makes the first pressure chamber produce predetermined pressure, and piston driving center-pole and expansion cone move up with respect to described expansion tube, make the predetermined portions radial dilatation of described expansion tube.
12. oil well subsidy construction method according to claim 11 is characterized in that, described expansion tube assembly also comprises card extension detent mechanism, and described expansion cone is enclosed within on 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 center-pole;
In described method, step S200 comprises:
S210 makes the first pressure chamber produce predetermined pressure, and piston driving center-pole and expansion cone move up with respect to expansion tube;
S220 reduces the pressure of the first pressure chamber, and center-pole moves down with respect to expansion cone, returns to step S210.
13. according to claim 11 or 12 described oil well subsidy construction methods is characterized in that,
After described step S200, also comprise step S200-1:
Pull described expansion cone to move up with respect to expansion tube by delivering tubing string, make other part radial dilatation of expansion tube.
CN 201010106783 2010-02-03 2010-02-03 Expansion tube assembly, oil well subsidy construction mechanism and construction method CN101812980B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010106783 CN101812980B (en) 2010-02-03 2010-02-03 Expansion tube assembly, oil well subsidy construction mechanism and construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010106783 CN101812980B (en) 2010-02-03 2010-02-03 Expansion tube assembly, oil well subsidy construction mechanism and construction method

Publications (2)

Publication Number Publication Date
CN101812980A CN101812980A (en) 2010-08-25
CN101812980B true CN101812980B (en) 2013-06-26

Family

ID=42620330

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201010106783 CN101812980B (en) 2010-02-03 2010-02-03 Expansion tube assembly, oil well subsidy construction mechanism and construction method

Country Status (1)

Country Link
CN (1) CN101812980B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105604516B (en) * 2015-12-30 2018-08-14 中国石油天然气股份有限公司 A kind of oil well casing self-expanding patch device and its subsidy method
CN108104754B (en) * 2017-05-09 2020-06-09 中国石油天然气股份有限公司 Casing patching device and method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3412565A (en) * 1966-10-03 1968-11-26 Continental Oil Co Method of strengthening foundation piling
CN101210485B (en) * 2006-12-25 2012-06-06 中国石油集团川庆钻探工程有限公司 Design method of expansion sleeve for oil field

Also Published As

Publication number Publication date
CN101812980A (en) 2010-08-25

Similar Documents

Publication Publication Date Title
US8967281B2 (en) Expandable packer
EP2292893B1 (en) Permeability modification
US7146702B2 (en) Method and apparatus for forming a mono-diameter wellbore casing
CA2714411C (en) Expansion cone for expandable liner hanger
CA2467381C (en) Mono diameter wellbore casing
AU2001294802B2 (en) Method and apparatus for casing expansion
US7275601B2 (en) Radial expansion of tubular members
RU2308592C2 (en) Drilling assembly (variants), well drilling method with the use of the drilling assembly and drilling assembly manufacturing method
US7325602B2 (en) Method and apparatus for forming a mono-diameter wellbore casing
US3746091A (en) Conduit liner for wellbore
CN101490362B (en) Method of radially expanding a tubular element
US6981550B2 (en) Sonde
US7363984B2 (en) System for radially expanding a tubular member
US20070272405A1 (en) Ribbed sealing element and method of use
CN1280443C (en) Expanding metal material and bulged tube device for petroleum oil well
CN101680282B (en) cladding method and expansion tool
US3780562A (en) Device for expanding a tubing liner
US7308755B2 (en) Apparatus for forming a mono-diameter wellbore casing
US7360591B2 (en) System for radially expanding a tubular member
US7111679B2 (en) Expander for expanding a tubular element
US20040238181A1 (en) Liner hanger
US20030024711A1 (en) Tubing expansion
US8746028B2 (en) Tubing expansion
US20150218917A1 (en) Method for repairing a liner hanger, device and blank for implementation thereof
US3712376A (en) Conduit liner for wellbore and method and apparatus for setting same

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right

Effective date of registration: 20100927

Address after: 100089 Beijing city Haidian District West Fourth Ring Road No. 140 building 309 primary business management

Applicant after: Holding Energy Petroleum Engineering (Beijing) Co., Ltd.

Address before: 100089 Beijing city Haidian District West Fourth Ring Road No. 140 building 309 primary business management

Applicant before: Holding Energy Petroleum Engineering (Beijing) Co., Ltd.

Co-applicant before: Tan Yanjun

C41 Transfer of patent application or patent right or utility model
ASS Succession or assignment of patent right

Free format text: FORMER OWNER: TAN YANJUN

GR01 Patent grant
C14 Grant of patent or utility model
TR01 Transfer of patent right

Effective date of registration: 20180615

Address after: 300452 Tianjin Binhai New Area Tianjin free trade area (central business district) Yingbin Avenue, International Building, 2 -2207

Patentee after: Huad Hongji Petroleum Engineering Technology (Tianjin) Co., Ltd.

Address before: 100089 Beijing Haidian District West Fourth Ring Road North 140, Beijing Ding original business building 309

Patentee before: Holding Energy Petroleum Engineering (Beijing) Co., Ltd.

TR01 Transfer of patent right