CN104213861B - A kind of expansion tube expanding process and tool system - Google Patents
A kind of expansion tube expanding process and tool system Download PDFInfo
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- CN104213861B CN104213861B CN201310220019.2A CN201310220019A CN104213861B CN 104213861 B CN104213861 B CN 104213861B CN 201310220019 A CN201310220019 A CN 201310220019A CN 104213861 B CN104213861 B CN 104213861B
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Abstract
A kind of expansion tube expanding process and tool system, belong to and be drilled well technical field in oil and gas industry.Including lifting sub, center-pole assembly, connecting rod assembly, expansion tube assembly, connecting short section, expansion cone assembly, combination fluid cylinder, hydraulic anchor, plug；Screw thread is arranged at lifting sub top, is connected with drilling rod, expansible tool string can be transferred to precalculated position；Lifting sub lower end is connected with center-pole assembly, center-pole assembly is threaded connection by three identical center-poles and forms, one group of block that can stretch is had every a segment distance on every center-pole, it is preset at after compression in expansion tube, when carrying on center-pole, when block exposes expansion tube can automatic spring, expansion tube end can be fixed on when center-pole moves to block；Block realizes flexible by spring mechanism, totally 4 groups, is evenly distributed on center-pole circumference.The present invention reduces drilling and well completion cost, has application prospect widely.
Description
Technical field
The present invention relates to a kind of expansion tube expanding process and tool system, belong to and oil and gas industry is drilled well
Technical field.
Background technology
Bulged tube technology (Expandable Tubular Technology) be last century the nineties produce and developed
The new technology come, can be applicable to the operation process such as drilling well, completion, oil recovery, well workover, is described as bringing and changes sexual development
New technology.So-called expansion tube refers to the metal circular tube made with special material, and its reset condition has preferable ductility, swollen
Under the effect of expansive force, by the squeezing action of expansion cone, its internal diameter and external diameter are all expanded and are occurred permanent plastic deformation, swollen
Swollen rate can reach 15～60%.Bulged tube technology, by expansion tube is implemented tube expansion operation, changes the crystal group of expansion tube material
Knit structurally and mechanically performance so that it is intensity index is improved, and plasticity index declines.Bulged tube technology is by selecting or adjusting
The technological means such as expansion tube material, control expansion rate, can make expansion tube obtain the mechanical performance suitable with specific steel-grade bushing and refer to
Mark, thus meet the use requirement of petroleum works.
Bulged tube technology is generally available and solves the various problems that bad ground causes, and such as closure serious thief zone, solves
Certainly well collapses problem etc., it is also possible to for subsidy and reparation, tail tube hanging, the intensification of old well, Multilateral Wells, the horizontal well of sleeve pipe
Deng.It is classified by the purposes according to bulged tube technology, can be divided into casing patching system, bore hole system, expand tail tube hanging
Several big technical systems such as system and equal diameter drill completion system.
At present, the mode that domestic conventional expansion tube expansion process uses liquid to suppress expansion, i.e. expand tool string and be positioned over
Preset suppresses in chamber, transfers to well section of constructing the most together, squeezes into highly pressurised liquid, and highly pressurised liquid promotes expansion cone to move, real
Now expand operation.Have the disadvantage that when expansion tube wall thickness is the thinnest (less than 7mm), it is impossible to doing threaded, pressure chamber is difficult to reality
Existing.Limited by suppressing chamber size, it is impossible to obtain maximum diameter.
Summary of the invention
In order to overcome the deficiencies in the prior art, the present invention provides a kind of expansion tube expanding process and tool system.
It is an object of the invention to provide one to expand tool system for oil drilling, meet expansion tube repairing casing, closure
Requirement in the construction operations such as bad ground.
A kind of expand tool system, utilize hydraulic coupling to promote hydraulic cylinder to drive expansion cone distending expansion tube, make expansion tube with
Internal surface of sleeve pipe or open hole formation fit tightly, it is achieved repairing casing, the purpose on closure stratum.
A kind of expand tool system, short including lifting sub, center-pole assembly, connecting rod assembly, expansion tube assembly, connection
Joint, expansion cone assembly, combination fluid cylinder, hydraulic anchor, plug.
Screw thread is arranged at lifting sub top, is connected with drilling rod, expansible tool string can be transferred to precalculated position.Its feature
Being: lifting sub lower end is connected with center-pole assembly, center-pole assembly is threaded connection group by three identical center-poles
Become, every center-pole has one group of block that can stretch every a segment distance, is preset at after compression in expansion tube, when on center-pole
When carrying, when block exposes expansion tube can automatic spring, expansion tube end can be fixed on when center-pole moves to block.Block passes through
Spring mechanism realizes flexible, totally 4 groups, is evenly distributed on center-pole circumference.Center-pole lower end is by screw thread and connecting rod assembly
Connecting, connecting rod assembly is made up of upper connecting rod, dust ring, jump ring and sealing ring.
Upper connecting rod lower end is connected by the first stage piston bar of jump ring with combination fluid cylinder.It is cased with on first stage piston bar sealing
Set, sealing shroud inner surface and piston rod packing, outer surface and fluid cylinder housing seal.First stage piston bar and second piston rod are by living
Chock plug connects.Piston head top has discharge orifice, flows out for liquid, promotes piston rod to move.Piston head outer surface has close
Sealing groove, is provided with sealing ring in seal groove, for the sealing with fluid cylinder housing.Combination fluid cylinder second piston rod lower end and lower extension bar
It is threaded connection.Lower connection rod structure is similar to piston head, and it has discharge orifice, flows out for liquid, promotes piston rod to move
Dynamic.Lower extension bar lower end is connected with hydraulic anchor by screw thread, and hydraulic anchor lower end is plug, for hydraulic seal.
Expansion cone is arranged on the step lower end connecting clamping sleeve with fluid cylinder top connection, and fluid cylinder top connection is led to fluid cylinder housing
Crossing threaded, then expansion cone is connected with fluid cylinder housing, and upper end is passed through with expansion tube connecting short section by connecting clamping sleeve
A kind of negative angle ladder left hand thread partially connects.Expansion cone is positioned at expansion tube bottom, outside its maximum outside diameter is more than the maximum of expansion tube
Footpath.Expansion cone uses a kind of steel alloy processing and manufacturing, has higher case hardness.
Expansion tube bottom is connected to expansion tube connecting short section by screw thread, and expansion tube connecting short section lower end inner surface car has negative
Angle ladder left hand thread partially, connects with being connected clamping sleeve.This negative angle screw thread both its connection functions, again can be when expansion cone moves up
Direct trip.Expansion tube outer surface vulcanizes rubber sleeve at a certain distance, and rubber sleeve can make expansion tube to the bore hole borehole wall
Better adaptability, strengthens the expansion tube stickiness to the subsidy borehole wall.
Fluid cylinder housing and expansion cone assembly are arranged on expansion tube lower end, and the two constitutes expansible tube swelling tool system
Expansion tool string, by hydraulic coupling promote expansion cone realize expansion tube expand operation.
A kind of expansion tube expanding process, containing following steps；Available drilling rod is connected kit with lifting sub
In system lower going-into-well at predetermined well section.Can carry out suppressing tube expansion operation after connecting the high-pressure pump on ground and high pressure line.Suppress
First upper lifting pipe post, when mentioning the stroke of a block on center-pole, starts to suppress, and highly pressurised liquid passes through first stage piston
Discharge orifice on bar enters into the space between cylinder body and first stage piston bar, and highly pressurised liquid is by letting out on second piston rod simultaneously
Discharge orifice enters into the space between hydraulic cylinder sealing set and second piston rod, and highly pressurised liquid promotes piston rod to have and moves downward
Trend, and the block of the ejection on center-pole is fixed on expansion tube end, prevents piston rod to move downward, according to hydraulic cylinder phase
To motion principle, fluid cylinder housing can only move upward.
When the pressure of the highly pressurised liquid injected reaches the bulbs of pressure of design, fluid cylinder housing and expansion cone assembly will upwards
Motion, the first left-handed negative angle screw buckle of expansion cone front end is disengaged, and expansion cone continues up, and is expanded to set by expansion tube
Meter size is also fitted on casing wall.
Injecting highly pressurised liquid constantly, expansion tube can be expanded a certain distance by fluid cylinder housing and expansion cone assembly, should be away from
From equal to piston rod stroke in hydraulic cylinder body.When fluid cylinder housing moves to full stroke position with expansion cone assembly, high
Press liquid can discharge orifice efflux cylinder pressure housing from one-stage hydraulic cylinder cylinder body, now this tool system is unable to maintain that height
Pressure, expands tool string and completes an expansion stroke, termination of pumping pressure release.
Continue upper lifting pipe post, expose next group block, proceed to suppress.Being designed with of this expansion tool string is multistage
The structure of cylinder, can reduce bulbs of pressure during tube expansion construction operation, and can change many easily according to actually used situation
The level sum of series size of cylinder thus reasonably configure the bulbs of pressure.
For different hole conditions, it may be necessary at the expansion tube that the application of some well section is longer, it is therefore desirable to expansion pipe
Tool system can carry out the tube expansion operation of multiple expansion stroke.When blocks all on center-pole are suggested, and now, expansion tube is
Some is swollen and is close on a borehole wall keep static, continues center, upper body tubing string, and hydraulic anchor enters in expansion tube, when
When injecting highly pressurised liquid, hydraulic anchor opens under highly pressurised liquid effect and is fixed on expansion tube inwall, it is achieved center-pole is fixed, this
Time, turn on pump proceeds to suppress tube expansion operation, can complete next expansion stroke.The most repeated multiple times can be whole by expansion tube
Expansion completes.
Invention effect:
The invention provides a kind of expansion pipe expansion process and instrument, this construction technology is simple to operate, safe and reliable,
Expansion tube construction operation in sleeve pipe and in bore hole system can be completed.After applying this technique to carry out construction operation, Ji Nengda
To the purpose of process down hole problem, ensure that being normally carried out of subsequent well process, therefore, it is possible to effectively process drilling well
Risk and accident, improve security reliability and the bit speed of drilling process；And reduce raw material to use, obtain maximum logical
Footpath, thus reduce drilling and well completion cost, there is application prospect widely.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by referring to detailed description below, it is possible to be more completely more fully understood that the present invention with
And easily learn the advantage that many of which is adjoint, but accompanying drawing described herein is used for providing a further understanding of the present invention,
Constituting the part of the present invention, the schematic description and description of the present invention is used for explaining the present invention, is not intended that this
Bright improper restriction, such as figure wherein:
Fig. 1 be in the embodiment of the present invention with" as a example by sleeve pipe, after casing collapse or deformation, subsidy 140 × 6mm's is swollen
Tube expansion, casing wall thickness is 8.94mm.
Fig. 2 is the structure principle chart of inventive article system.In figure, 1 is lifting sub, and 2 is expansion tube, bar centered by 3,
4 is block, and 5 is upper connecting rod, and 6 is dust ring, and 7 is jump ring, and 8 is lower connecting rod, and 9 is first stage piston bar, and 10 for expansion tube even
Connecing pipe nipple, 11 for connecting clamping sleeve, and 12 is expansion cone, and 13 is fluid cylinder top connection, and 14 is one-level fluid cylinder, and 15 is piston head, and 16 are
Second piston rod, 17 is two grades of fluid cylinders, and 18 is lower extension bar, and 19 is hydraulic anchor, and 20 is plug.
Fig. 2 is shown that an expansion stroke tube expansion operation when will start, residing for each element of expansible tool system
Position partial schematic diagram.
Fig. 3 is shown that an expansion stroke tube expansion operation when will start, residing for each element of expansible tool system
Position partial schematic diagram.
Fig. 4 is shown that an expansion stroke tube expansion operation when will start, residing for each element of expansible tool system
Position partial schematic diagram.
Fig. 5 is shown that an expansion stroke tube expansion operation when will start, residing for each element of expansible tool system
Position partial schematic diagram.
The present invention is further described with embodiment below in conjunction with the accompanying drawings.
Detailed description of the invention
Obviously, those skilled in the art belong to the guarantor of the present invention based on the many modifications and variations that spirit of the invention is done
Protect scope.
Embodiment 1: as shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, a kind of expands tool system, and expansion tube outer surface is every one
Set a distance vulcanized rubber set and step, rubber sleeve can make the expansion tube better adaptability to the bore hole borehole wall, strengthens expansion tube pair
The stickiness of the bore hole borehole wall, step can strengthen laminating and the hanging capacity of expansion tube.
Expansion tube assembly expands connecting short section and is positioned at expansion tube bottom, be connected with expansion tube by regular screw threads mouth,
Other end car has negative angle ladder left hand thread button partially to connect with being connected clamping sleeve, and expansion cone can be threaded off after expanding.
Center-pole assembly is made up of three identical center-poles, block and spring.Three groups of blocks are had on every center-pole,
Often organizing along the circumferential direction four blocks of distribution, block under the action of the spring can be with automatic telescopic.
Hydraulic cylinder body assembly is by first stage piston bar, piston head, second piston rod, lower extension bar, fluid cylinder housing, fluid cylinder
Joint forms；
Drilling rod is connected with center-pole by lifting sub, and center-pole is threaded connection with upper connecting rod, upper connecting rod and
Lower connecting rod is connected by jump ring, and lower connecting rod is connected with first stage piston bar by screw thread；First stage piston bar by piston head with
Second piston rod connects, and second piston rod is connected with hydraulic anchor by lower extension bar.Fluid cylinder housing passes through fluid cylinder top connection and expansion
Cone connects.
Upper connecting rod upper end is threaded connection center-pole, and lower end connects lower connecting rod by jump ring, and upper connecting rod overlaps
There are dust ring, lower end outer surface to have seal groove, sealing ring is installed in seal groove.
One-stage hydraulic cylinder in hydraulic cylinder body assembly and the cylinder body appropriate position of two-stage hydraulic cylinder have steam vent and
Discharge orifice.
Sealing shroud outer surface in hydraulic cylinder body assembly and inner surface have seal groove, are provided with sealing in seal groove
Circle.
Hydraulic cylinder body assembly has on piston head discharge orifice, inner surface and outer surface and has seal groove, in seal groove
Equipped with sealing ring.
Having discharge orifice on lower extension bar in hydraulic cylinder body assembly, outside has seal groove, and seal groove is built with sealing ring.
Hydraulic cylinder body assembly first stage piston bar is connected by piston head with second piston, and second piston rod leads to lower extension bar
Cross threaded.
Hydraulic cylinder is with expansion cone assembly, and expansion cone is enclosed within the shoulder lower end connecting clamping sleeve with fluid cylinder top connection；Connect
Clamping sleeve is connected with expansion tube by negative angle ladder left hand thread partially；Fluid cylinder top connection is connected with one-stage hydraulic cylinder by screw thread；Swollen
The maximum outside diameter of swollen cone is slightly less than the maximum outside diameter of expansion tube.
Hydraulic anchor assembly is connected with piston rod by lower extension bar, thus realizes the connection with center-pole.
With at wall thickness as 8.94mm" sleeve pipe is subsidized as a example by 140 × 6mm expansion tube (as shown in Figure 1), this work is described
How tool system uses.
During construction, available drilling rod accesses 1 kit system of lifting sub and is lowered into predetermined well section.Connect ground
Can carry out suppressing tube expansion operation by injected clear water after high-pressure pump and high pressure line.Before suppressing, first one stroke of upper body central tube, protect
Card block exposes expansion tube end, and then turn on pump is suppressed, and clear water enters fluid cylinder housing 14 by the discharge orifice 31 on piston head 15
And the space between first stage piston bar 9, clear water enters second piston rod 16 and liquid by the discharge orifice 32 on lower extension bar 17 simultaneously
Space between cylinder housing 14, thus promote second piston rod 16 and lower extension bar 17 to have the trend moved downward, center-pole 3 leads to
Cross extension bar 5 and lower extension bar 8 is connected with piston rod.And the block 4 on center-pole 3 is stuck in expansion tube end after ejecting, prevent
This trend moved downward, according to hydraulic cylinder relative motion principle, fluid cylinder housing 14 drives fluid cylinder top connection 13 and expansion cone
12 have the trend moved upward, and when the pressure of the clear water injected reaches 16MPa, fluid cylinder housing and expansion cone assembly will upwards
Motion, so that expansion tube 2 is expanded to by the expansion cone 12 that external diameter is 138mm
150mm is also fitted in" on casing pipe sleeve tube wall, as shown in Figure 1.This expansion tool string be designed with two-stage cylinder
Structure, making the bulbs of pressure is 16MPa.
Injected clear water constantly, and keep 16MPa, expansion tube 2 can be expanded certain by fluid cylinder housing and expansion cone assembly
Distance, this distance is equal to piston rod stroke in hydraulic cylinder body.When piston rod and expansion cone assembly move to shown in Fig. 4
During position, high pressure clear water discharge orifice 33 from fluid cylinder housing 14 and discharge orifice 34 can flow out cylinder body, now tool system without
Faville holds high pressure, expands tool string and completes an expansion stroke, termination of pumping pressure release.
This tool system can carry out the tube expansion operation of multiple expansion stroke.The tube expansion end of job when an expansion stroke
Time, the existing part of expansion tube 2 is swollen and is close on the bore hole borehole wall keep static.Now, center-pole certain distance is above carried, directly
Expose expansion tube end to next group block, proceed next expansion stroke.When 9 groups of blocks on center-pole are all carried
When going out, in now during upper lifting pipe post, hydraulic anchor 18 can enter into the expansion tube swollen, turn on pump continues to inject high pressure clear water, water
Power anchor 18 can open under pressure and be fixed in expansion tube, and the movement tendency of piston rod is prevented from, and fluid cylinder housing continues
Drive expansion cone is moved, and completes to expand operation.The most repeated multiple times expansion tube 2 all can be expanded.
As it has been described above, embodiments of the invention are explained, but as long as essentially without departing from this
Bright inventive point and effect can have a lot of deformation, and this will be readily apparent to persons skilled in the art.Therefore, this
Within the variation of sample is also integrally incorporated in protection scope of the present invention.
Claims (10)
1. one kind expands tool system, it is characterised in that include that lifting sub, center-pole assembly, connecting rod assembly, expansion tube are total
One-tenth, connecting short section, expansion cone assembly, combination fluid cylinder, hydraulic anchor, plug；
Screw thread is arranged at lifting sub top, is connected with drilling rod, expansible tool string can be transferred to precalculated position；Under lifting sub
End is connected with center-pole assembly, and center-pole assembly is threaded connection by three identical center-poles and forms, on every center-pole
Having one group of block that can stretch every a segment distance, be preset in expansion tube after compression, when carrying on center-pole, block exposes swollen
Meeting automatic spring during tube expansion, is stuck in expansion tube end after the block on center-pole ejects；Block realizes stretching by spring mechanism
Contracting, is evenly distributed on center-pole circumference totally by four groups；Center-pole lower end is connected with connecting rod assembly by screw thread, and connecting rod is total
Become to be made up of upper connecting rod, lower connecting rod, dust ring, jump ring and sealing ring；
Upper connecting rod lower end is connected with lower connecting rod by jump ring, and lower connecting rod is by the first stage piston bar of screw thread with combination fluid cylinder
Connect；Sealing shroud, sealing shroud inner surface and piston rod packing, outer surface and fluid cylinder housing seal it is cased with on first stage piston bar；One
Level piston rod is connected by piston head with second piston rod；Piston head top has discharge orifice, flows out for liquid, promotes piston
Bar moves；Piston head outer surface has seal groove, is provided with sealing ring in seal groove, for the sealing with fluid cylinder housing；Combination
Fluid cylinder second piston rod lower end is threaded connection with lower extension bar；Lower connection rod structure is similar to piston head, and it has discharge orifice,
Flow out for liquid, promote piston rod to move；Lower extension bar lower end is connected with hydraulic anchor by screw thread, and hydraulic anchor lower end is plug,
For hydraulic seal；
Expansion cone is arranged on the step lower end connecting clamping sleeve with fluid cylinder top connection, and fluid cylinder top connection and fluid cylinder housing pass through spiral shell
Line connects, and then expansion cone is connected with fluid cylinder housing, and upper end is by connecting clamping sleeve with expansion tube connecting short section by one
Negative angle ladder left hand thread partially connects；Expansion cone is positioned at expansion tube bottom, and its maximum outside diameter is more than the maximum outside diameter of expansion tube；Swollen
Swollen cone uses a kind of steel alloy processing and manufacturing, has higher case hardness；
Expansion tube bottom is connected to expansion tube connecting short section by screw thread, and expansion tube connecting short section lower end inner surface car has negative angle inclined
Ladder left hand thread, connects with being connected clamping sleeve；This existing connection function of negative angle screw thread, again can be direct when expansion cone moves up
Thread off；Expansion tube outer surface vulcanizes rubber sleeve at a certain distance, and rubber sleeve can make the expansion tube adaptation to the bore hole borehole wall
Property more preferable, strengthen the expansion tube stickiness to the subsidy borehole wall；
Fluid cylinder housing and expansion cone assembly are arranged on expansion tube lower end, and the two constitutes the swollen of expansible tube swelling tool system
Swollen tool string, promotes expansion cone to realize expansion tube by hydraulic coupling and expands operation.
A kind of expansion tool system the most according to claim 1, it is characterised in that expansion tube outer surface is at a certain distance
Sulfuration step, step can strengthen laminating and the hanging capacity of expansion tube；Expansion tube assembly expands connecting short section and is positioned at expansion
Pipe bottom, is connected with expansion tube by regular screw threads mouth, and other end car has negative angle ladder left hand thread button partially and is connected clamping sleeve
Connecting, expansion cone can be threaded off after expanding.
A kind of expansion tool system the most according to claim 1, it is characterised in that: center-pole assembly is identical by three
Center-pole, block and spring composition；There are three groups of blocks on every center-pole, often organize along the circumferential direction four blocks of distribution, block
Under the action of the spring can be with automatic telescopic.
A kind of expansion tool system the most according to claim 1, it is characterised in that hydraulic cylinder body assembly is to be lived by one-level
Stopper rod, piston head, second piston rod, lower extension bar, fluid cylinder housing, fluid cylinder top connection composition；
Drilling rod is connected with center-pole by lifting sub, and center-pole is threaded connection with upper connecting rod, upper connecting rod and lower company
Extension bar is connected by jump ring, and lower connecting rod is connected with first stage piston bar by screw thread；First stage piston bar is by piston head and two grades
Piston rod connects, and second piston rod is connected with hydraulic anchor by lower extension bar；Fluid cylinder housing is by fluid cylinder top connection with expansion cone even
Connect.
A kind of expansion tool system the most according to claim 1, it is characterised in that: upper connecting rod upper end is threaded connection
Center-pole, lower end connects lower connecting rod by jump ring, upper connecting rod is cased with dust ring, and lower end outer surface has seal groove, seals
Sealing ring is installed in groove；
One-stage hydraulic cylinder and the cylinder body appropriate position of two-stage hydraulic cylinder in hydraulic cylinder body assembly have steam vent and earial drainage
Hole.
A kind of expansion tool system the most according to claim 1, it is characterised in that the sealing shroud in hydraulic cylinder body assembly
Outer surface and inner surface have seal groove, are provided with sealing ring in seal groove；
Hydraulic cylinder body assembly has on piston head discharge orifice, inner surface and outer surface and has seal groove, seal groove built with
Sealing ring.
A kind of expansion tool system the most according to claim 1, it is characterised in that in hydraulic cylinder body assembly on lower extension bar
Having discharge orifice, outside has seal groove, and seal groove is built with sealing ring.
A kind of expansion tool system the most according to claim 1, it is characterised in that screw thread and one-level are passed through in fluid cylinder top connection
Hydraulic cylinder connects.
A kind of expansion tool system the most according to claim 1, it is characterised in that hydraulic anchor assembly is by lower extension bar and work
Stopper rod connects, thus realizes the connection with center-pole.
10. an expansion tube expanding process, containing following steps；It is connected kit system with lifting sub with drilling rod
In lower going-into-well at predetermined well section；Can carry out suppressing tube expansion operation after connecting the high-pressure pump on ground and high pressure line；Before suppressing
First upper lifting pipe post, when mentioning the stroke of a block on center-pole, starts to suppress, and highly pressurised liquid is by first stage piston bar
Discharge orifice enter into the space between cylinder body and first stage piston bar, highly pressurised liquid is by the discharge orifice on second piston rod simultaneously
Entering into the space between hydraulic cylinder sealing set and second piston rod, highly pressurised liquid promotes piston rod to have becoming of moving downward
Gesture, and the block of the ejection on center-pole is fixed on expansion tube end, prevents piston rod to move downward, relative according to hydraulic cylinder
Motion principle, fluid cylinder housing can only move upward；
When the pressure of the highly pressurised liquid injected reaches the bulbs of pressure of design, fluid cylinder housing will upwards be transported with expansion cone assembly
Dynamic, the first left-handed negative angle screw buckle of expansion cone front end is disengaged, and expansion cone continues up, and expansion tube is expanded to design
Size is also fitted on casing wall；
Injecting highly pressurised liquid constantly, expansion tube can be expanded a certain distance by fluid cylinder housing and expansion cone assembly, this distance etc.
In piston rod stroke in hydraulic cylinder body；When fluid cylinder housing moves to full stroke position with expansion cone assembly, high pressure liquid
Body can discharge orifice efflux cylinder pressure housing from one-stage hydraulic cylinder cylinder body, now this tool system is unable to maintain that high pressure, swollen
Swollen tool string completes an expansion stroke, termination of pumping pressure release；
Continue upper lifting pipe post, expose next group block, proceed to suppress；This expansion tool string be designed with Multi-stage cylinder
Structure, can reduce bulbs of pressure during tube expansion construction operation, and can change Multi-stage cylinder easily according to actually used situation
Sum of series size thus reasonably configure the bulbs of pressure；
For different hole conditions, it may be necessary at the expansion tube that the application of some well section is longer, it is therefore desirable to expansible piping tool
System can carry out the tube expansion operation of multiple expansion stroke；When blocks all on center-pole are suggested, now, expansion tube existing one
Part is swollen and is close on a borehole wall keep static, continues center, upper body tubing string, and hydraulic anchor enters in expansion tube, works as injection
During highly pressurised liquid, hydraulic anchor opens under highly pressurised liquid effect and is fixed on expansion tube inwall, it is achieved center-pole is fixed, and now, opens
Pump proceeds to suppress tube expansion operation, can complete next expansion stroke；The most repeated multiple times expansion tube all can be expanded
Complete.
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| CN201310220019.2A CN104213861B (en) | 2013-06-05 | 2013-06-05 | A kind of expansion tube expanding process and tool system |
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| CN201310220019.2A CN104213861B (en) | 2013-06-05 | 2013-06-05 | A kind of expansion tube expanding process and tool system |
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| CN104213861B true CN104213861B (en) | 2016-09-07 |
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| RU2652401C1 (en) * | 2017-01-23 | 2018-04-26 | Публичное акционерное общество "Татнефть" имени В.Д. Шашина | Method for installation of profile shutter in well |
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| CN104213861A (en) | 2014-12-17 |
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