CN201695977U - Expansion cone of expansion pipe assembly and expansion pipe assembly employing same - Google Patents
Expansion cone of expansion pipe assembly and expansion pipe assembly employing same Download PDFInfo
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- CN201695977U CN201695977U CN2010291660268U CN201029166026U CN201695977U CN 201695977 U CN201695977 U CN 201695977U CN 2010291660268 U CN2010291660268 U CN 2010291660268U CN 201029166026 U CN201029166026 U CN 201029166026U CN 201695977 U CN201695977 U CN 201695977U
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Abstract
The utility model discloses an expansion cone of an expansion pipe assembly and an expansion pipe assembly employing the same. The expansion cone of the expansion pipe assembly comprises a first contact section which adopts a tapered section with the outside diameter of the upper end less than that of the lower end; the expansion cone further comprises a second contact section under the first contact section; and the outside diameter of the lower end of the second contact section is larger than that of the lower end of the first contact section. The optimized technical scheme is that the second contact section adopts a cylindrical section with the outside diameter of the upper end equal to that of the lower end. When the expansion cone provided by the utility model is used, the first contact section can expand an expansion pipe in the radial direction; when the first contact section moves upward, the second contact section can keep on applying acting force to the inner wall of the expansion pipe, so that the expansion pipe is enabled to be deformed continuously; and the expansion cone can stop the expansion pipe from springing back so as to reduce the springback amount of the expansion pipe.
Description
Technical field
The utility model relates to a kind of oil well subsidy technology, particularly a kind of expansion cone of expansion tube assembly and expansion tube assembly with this expansion cone.
Background technology
The oil well subsidy technology is to utilize expansion tube assembly that basic sleeve pipe impaired in the oil well is repaired, to keep the technology of oil well sealing performance.Please refer to Fig. 1 and Fig. 2, Fig. 1 is the structural representation of expansion tube assembly in the prior art, and Fig. 2 is the structural representation of expansion tube in the expansion tube assembly shown in Figure 1.Below the contrast accompanying drawing describes prior art oil well subsidy technology.
Existing expansion tube assembly comprises central tube 210, expansion tube 220, expansion cone 230, plug 240 and rubber sleeve 250.Expansion tube 220 comprises two parts, the one, not dilation 221 and dilation 222 in advance, pre-dilation 222 internal diameters and external diameter are respectively greater than the not internal diameter and the external diameter (in the presents, unless stated otherwise, described internal diameter, external diameter are diameter) of dilation 221.Expansion cone 230 is positioned at the not upper end position of pre-dilation 222.Plug 240 is fixed with pre-dilation 222 bottoms, and the lower end closed of pre-dilation 222 inner chambers not, formation expansion chamber 201 between plug 240 upper surfaces and expansion cone 240 lower surfaces.Central tube 210 passes not dilation 221, and the lower end links to each other with the upper end of expansion cone 230 by suitable mechanism; The center of central tube 210 has through flow hole 211, and through flow hole 211 is communicated with expansion chamber 201 by the interstitial hole of expansion cone 230.Rubber sleeve 250 is enclosed within the not external surface of dilation 221 of expansion tube 220.For the convenience of describing, show the impaired place 101 of basic sleeve pipe 100 and basic sleeve pipe 100 among the figure with double dot dash line.
The process of utilizing existing expansion tube assembly that basic sleeve pipe 100 is repaired is as follows:
The first step, the location is located in position expansion tube assembly, and is relative with the impaired place 101 of basic sleeve pipe 100.
Second step, pressurization, expand tube.Please refer to Fig. 3, this figure is the operating principle schematic diagram of expansion tube assembly among Fig. 1.Delivery tubing string external tapping is communicated with the pressurization mouth of booster station, and high-pressure slurry arrives expansion chambers 201 by the through flow hole 211 of delivering tubing string, central tube 210, forms the expansion high pressure in expansion chamber 201.Because plug 240 is fixed together with expansion tube 220, shown in arrow among Fig. 3, the expansion high pressure moves up expansion cone 230 for the thrust of the lower end generation of expansion cone 230.Because the maximum gauge of expansion cone 230 is greater than dilation 221 internal diameters not, in expansion cone 230 up processes, the inner conical surface that its male cone (strobilus masculinus) can be by expansion tube 220 makes not dilation 221 radial dilatation to the expansionary force that dilation 221 not produces radially; Like this, in expansion cone 230 moves up process, make not dilation 221 overall radial expansion of expansion tube 220, form expansion segment.The maximum gauge of the internal diameter of expansion segment and expansion cone 230 is suitable substantially; Simultaneously, the inwall of the outer wall of expansion segment and basic sleeve pipe 100 fits, and makes expansion tube 220 be fixed on 101 places, impaired place of basic sleeve pipe 100.The expand tube process finishes, and trips out to deliver tubing string, central tube 210 and expansion cone 230, and expansion tube 220 becomes one with basic sleeve pipe 100, realizes the reparation to basic sleeve pipe 100.In the expand tube process, rubber sleeve 250 is compressed, to fill up the interval between expansion segment external diameter and basic sleeve pipe 100 internal diameters, keep the sealing between expansion tube 220 and the basic sleeve pipe 100, and between expansion tube 220 and basic sleeve pipe 100, produce predetermined suspension force; Described suspension force be expansion tube the vertical active force that can bear, have predetermined suspension force, expansion tube just can keep fixing with basic sleeve pipe when bearing predetermined vertical active force, and the sealing between maintenance and the basic sleeve pipe.
The 3rd step was lowered to the milling tubing string in the expansion tube 220 after expanding, and plug milling is bottom fallen, and expansion tube 220 lower ends are communicated with the basic sleeve pipe 100 of below.
Please refer to Fig. 4, this figure is the half section structural representation of the expansion cone of prior art expansion tube assembly.Expansion cone 230 comprises linkage section 231, awl section 232, the section of setting upright 233 and the seal section 234 that order links to each other.Linkage section 231 upper ends link to each other with central tube 210.The external diameter of awl section 232 increases from top to bottom gradually, forms cone structure, and maximum gauge is the external diameter of lower end.Move past in the journey on expansion cone 230, awl section 232 can contact with expansion tube 220, and its expansion tube 220 is applied active force, make expansion tube 220 not dilation carry out radial dilatation.The external diameter of the section of setting upright 233 equates substantially with the external diameter of awl section 232 lower ends, is used to make expansion cone 230 to keep plumbness.Seal section 234 side faces match with expansion tube 220, to keep the sealing performance of expansion chamber 201; Seal section 234 can be provided with joint ring, and joint ring can be installed in the corresponding seal groove.
The process of expansion tube 220 radial dilatation is a flow harden process in fact, and in this process, expansion tube 220 produces plastic deformation under 232 effects of awl section, makes the internal diameter of expansion tube 220 and outside dimension produce predetermined variation.The deformation of expansion tube 220 can be divided into the interval and plastic deformation interval of elastic deformation, is to be introduced into the elastic deformation interval when flow harden distortion beginning, and the increase along with deformation rate progressively enters the plastic deformation interval then.Expansion tube 220 deformation ratios are in the plastic deformation interval and obvious rebound phenomenon can take place, and deformation rate is in the elastic deformation interval tangible resilience will take place.But a large amount of experiences checking even if the expansion tube deformation ratio is very big, after the expansion tube radial dilatation, still corresponding resilience can take place before the typing, produce springback capacity, and deformation ratio is big more, and springback capacity is just big more.
After expansion cone 230 made expansion tube 220 deformation, expansion tube 220 expansion segment internal diameters were slightly larger than the lower end external diameter of awl section 232; For example: when awl section 232 lower end external diameters were 108mm, after expansion tube 220 radial dilatation, between 108.5mm-108.9mm, before the typing, expansion tube 220 springback capacities were approximately 0.3mm to the expansion segment internal diameter greatly.The section of setting upright 233 external diameters and the lower end external diameter of boring section 232 also are 108mm, less than the expansion segment internal diameter; Therefore, the section of setting upright 233 can't can not stop the resilience of expansion tube 220 to the active force that applies of expansion tube 220 inwalls at all.
Yet in the prior art, the springback capacity before the expansion tube typing can cause adverse effect to the expansion tube internal diameter, can reduce the latus rectum of oil well behind the subsidy construction, and then influence being lowered to of subsequent production tool equipment, reduces the production capacity of oil well after the subsidy.Therefore, the springback capacity that how to reduce expansion tube is the technical barrier that prior art need solve.
The utility model content
At above-mentioned technical barrier, first purpose of the present utility model is, a kind of expansion cone is provided, and utilizes this expansion cone can reduce after the radial dilatation springback capacity of expansion tube.
Providing on the basis of above-mentioned expansion cone, second purpose of the present utility model is, a kind of expansion tube assembly is provided.
In order to realize above-mentioned first purpose, the expansion cone of the expansion tube assembly that the utility model provides comprises first contact-segment, described first contact-segment is the conical section of upper end external diameter less than its lower end external diameter, difference with the prior art is, also comprise second contact-segment that is positioned at first contact-segment below, the external diameter of the described second contact-segment lower end is greater than the external diameter of the first contact-segment lower end.
Preferably, described expansion cone also comprises first section of setting upright that the upper end links to each other with the lower end of first contact-segment, and described first section of setting upright is the cylindrical segment that external diameter equates with the first contact-segment lower end external diameter.
Preferably, described second contact-segment is the cylindrical segment that the upper end external diameter equates with its lower end external diameter.
Optionally, described second contact-segment is the conical section of upper end external diameter less than its lower end external diameter.
Preferably, the tapering of described second contact-segment is less than the tapering of first contact-segment.
Preferably, described expansion cone also comprises second section of setting upright that the upper end links to each other with the lower end of second contact-segment, and described second section of setting upright is the cylindrical segment that external diameter equates with the second contact-segment lower end external diameter.
Preferably, keep preset distance between the upper end of the lower end of described first contact-segment and second contact-segment, preset distance is between 30mm～35mm.
In order to realize above-mentioned second purpose, a kind of expansion tube assembly that the utility model provides comprises expansion tube and central tube, and difference with the prior art is, also comprises the expansion cone of above-mentioned any expansion tube assembly, the upper end of described expansion cone links to each other with central tube, and is positioned at expansion tube.
The another kind of expansion tube assembly that the utility model provides comprises expansion tube, center-pole and power cylinder, and described power cylinder comprises cylinder barrel and piston, and the piston rod of described piston slidably cooperates with the bottom of cylinder barrel; The piston body of described piston is installed on the piston rod, and matches with the internal face of described cylinder barrel, forms first pressure chamber in cylinder barrel; Described center-pole upper end links to each other with the lower end of piston rod; Described piston has and is communicated with the pressurization passageway that first pressure chamber, opening are positioned at the upper surface of described piston rod, also comprises the expansion cone of above-mentioned any expansion tube assembly, and described expansion cone is installed on the described center-pole; Described expansion tube is enclosed within outside the center-pole, and between the male cone (strobilus masculinus) of first contact-segment of the lower surface of described cylinder barrel and expansion cone.
Compare with expansion cone of the prior art, the expansion cone that the utility model provides has two and can contact with expansion tube, and it is applied the contact-segment of active force; Wherein, first contact-segment and awl of the prior art section have identical functions, and second contact-segment is positioned at first contact-segment below, and the external diameter of the second contact-segment lower end is greater than the external diameter of the first contact-segment lower end; Like this, in the expand tube process, first contact-segment can make expansion tube carry out radial dilatation, after moving on first contact-segment, second contact-segment can continue the expansion tube inwall is applied active force, makes expansion tube continue to produce deformation, stop the expansion tube resilience, reduce the springback capacity of expansion tube.
In further technical scheme, expansion cone also comprises first section of setting upright that links to each other with first contact-segment, can prevent that like this expansion cone from wandering off, and guarantees the quality of subsidy construction.
In further technical scheme, second contact-segment is a cylindrical segment; Can prolong the time of contact of second contact-segment and expansion tube internal face like this, more to help reducing the springback capacity of expansion tube.
In another technical scheme, described second contact-segment is a conical section, the resistance that expansion tube produces expansion cone in the time of can reducing to move on the expansion cone like this, and then reduce to move needed driving force on the expansion cone, make things convenient for the operation of subsidy construction.
In further technical scheme, have predetermined distance between described first contact-segment and second contact-segment, can before the expansion tube typing, second contact-segment be contacted with the expansion tube inwall like this, guarantee to stop the effect of expansion tube resilience, reduce the springback capacity of expansion tube.
Because above-mentioned expansion cone has above-mentioned technique effect, the expansion tube assembly with this expansion cone also has the corresponding techniques effect.
Description of drawings
Fig. 1 is the structural representation of expansion tube assembly in the prior art;
Fig. 2 is the structural representation of expansion tube in the expansion tube assembly shown in Figure 1
Fig. 3 is the operating principle schematic diagram of expansion tube assembly among Fig. 1;
Fig. 4 is the half section structural representation of the expansion cone of prior art expansion tube assembly;
Fig. 5 is the half section structural representation of the expansion cone that provides of the utility model embodiment one, shows the outline drawing of expansion tube among the figure with double dot dash line;
Fig. 6 is the structural representation with expansion tube assembly of the expansion cone that the utility model provides, and the structure of these other parts of expansion tube assembly is identical with the structure of expansion tube assembly appropriate section in another patent application;
Fig. 7 is the operating principle schematic diagram of expansion tube assembly shown in Fig. 6.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in detail, the description of this part only is exemplary and explanatory, should any restriction not arranged to protection domain of the present utility model.Should be noted that in the presents that described contact-segment is meant that its side face can contact with the expansion tube inwall, and it is applied active force, make it produce the part of deformation; In order to have described convenience, in the presents, described upper and lower duty with expansion tube assembly serves as that the basis is determined.
Please refer to Fig. 5, this figure is the half section structural representation of the expansion cone that provides of the utility model embodiment one, shows the outline drawing of expansion tube among the figure with double dot dash line.This expansion cone is a tubular structure, and inner hollow can link to each other with center-pole of the prior art, and the structure that links to each other with center-pole can be same as the prior art, no longer describes in detail.
The expansion cone that embodiment one provides comprises first contact-segment 421, first section of setting upright 422, second contact-segment 423 and seal section 424; Wherein, seal section 424 can be identical with seal section of the prior art, do not repeat them here.First contact-segment 421 is the conical section of upper end external diameter less than its lower end external diameter, and its side face forms a male cone (strobilus masculinus), and this part can be identical with the awl section of expansion cone in the prior art, and the external diameter of first section of setting upright 422 is identical with first contact-segment, 421 lower end external diameters.Difference from prior art is, this expansion cone also comprises between second contact-segment, 423, the second contact-segments 423 that are positioned at first contact-segment, 421 belows and the section of setting upright 422 having a necking section; The external diameter of second contact-segment, 423 lower ends is greater than the external diameter of first contact-segment, 421 lower ends, and in this example, second contact-segment 423 is the cylindrical segment that the upper end external diameter equates with the lower end external diameter.
When utilizing above-mentioned expansion cone to carry out expand tube, the male cone (strobilus masculinus) of first contact-segment 421 at first contacts with expansion tube 220 internal faces, and expansion tube 220 is applied active force, and the part of expansion tube 220 is carried out radial dilatation.Along with moving on the expansion cone, the part that has produced radial dilatation is relative with centering ring 422, and produces springback capacity, describes as the background technology part, and centering ring 422 can not stop the resilience of expansion tube 220.Along with moving in the expansion cone continuation, second contact-segment 423 is relative with the part that produces radial dilatation; Because second contact-segment, 423 external diameters are greater than the external diameter of first contact-segment, 421 lower ends, at this moment, second contact-segment 423 can contact with expansion tube 220, and expansion tube 220 applied active force, make expansion tube continue generation deformation radially, thereby can stop expansion tube 220 resiliences effectively, reduce the springback capacity of expansion tube 220.
Because typing needs the regular hour after the resilience of expansion tube 220, therefore, by moving speed on the control expansion cone, can be before the resilience typing in the radial dilatation of expansion tube 220 part, second contact-segment 423 is contacted with expansion tube 220, it is applied active force, stop expansion tube 220 resiliences; Therefore, on expansion cone, move speed hour, can make between first contact-segment 421 and second contact-segment 423 to have less distance; When the speed of moving on expansion cone is big, can make between first contact-segment 421 and second contact-segment 423 to have bigger distance.According to general subsidy construction practical operation, the speed of moving is approximately 3m/ minute on the expansion cone, at this moment, can make that distance remains between 30mm～35mm between the lower end of the lower end of first contact-segment 421 and second contact-segment 423.In addition, when expansion tube 220 is longer, more contact-segment can be set, and the maximum outside diameter of each contact-segment is increased gradually; The contact-segment that has is many more, and after the radial dilatation, the springback capacity of expansion tube 220 is more little.
According to foregoing description, be appreciated that, also second contact-segment 423 can be set to conical section, even the upper end external diameter of second contact-segment 423 is less than the lower end external diameter, as long as keep the external diameter of the external diameter of second contact-segment, 423 lower ends, just can realize reducing the purpose of expansion tube 220 springback capacities greater than first contact-segment, 421 lower ends.Simultaneously, second contact-segment 423 is set to conical section, can also reduces the resistance that 220 pairs second contact-segments of expansion tube 423 produce, reduce to drive needed driving force when moving on the expansion cone; Optimized technical scheme is, makes the tapering of the tapering of second contact-segment 423 less than first contact-segment 421, so that second contact-segment 423 contacted with expansion tube 220 inwalls in the long time, stops expansion tube 220 resiliences better.
When second contact-segment 423 is conical section, in order to guarantee the expansion cone pan-up, second section of setting upright can also be set in the lower end of second contact-segment 423, and the external diameter of second section of setting upright is equated with second contact-segment, 423 lower end external diameters, the function of second section of setting upright and first section of setting upright 422 and identical does not repeat them here.Under specific circumstances, also centering ring can be saved.
Providing on the basis of above-mentioned expansion cone, the utility model also provides the expansion tube assembly with this expansion cone, this expansion tube assembly comprises expansion tube, central tube and above-mentioned any expansion cone, and the upper end of described expansion cone links to each other with central tube, and is positioned at expansion tube.Because expansion cone has above-mentioned technique effect, the expansion tube assembly with this expansion cone also has the corresponding techniques effect.
Above-mentioned expansion cone not only can be applied to expansion tube assembly of the prior art, can also be used for the expansion tube assembly that another patent of applicant provides.The applicant of this patent provides a kind of expansion tube assembly in another denomination of invention in " expansion tube assembly, oil well subsidy construction mechanism " patent application.Please examine Fig. 6, this figure is the structural representation with expansion tube assembly of the expansion cone that the utility model provides, and the structure of these other parts of expansion tube assembly is identical with the structure of expansion tube assembly appropriate section in another patent application.Below the structure of this expansion tube assembly is described, for the convenience of describing, also show basic sleeve pipe 100 among the figure.
The above-mentioned expansion tube assembly that provides comprises expansion tube 410, expansion cone 420 and center-pole 430; Expansion cone 420 can be above-mentioned any expansion cone, and this expansion cone is installed on the center-pole 430, can move up at upper and lower with center-pole 430.In this expansion tube assembly, expansion cone 420 does not need to keep sealing with expansion tube 410, therefore, seal section in the expansion cone can be saved.
In addition, expansion tube assembly also comprises power cylinder 440, and power cylinder 440 comprises piston 441 and cylinder barrel 442, wherein, the piston rod of piston 441 connects cylinder barrel 442, and slidably cooperates respectively with the upper end and the bottom of cylinder barrel 442, forms predetermined space between cylinder barrel 442 and the piston rod thereby make; The piston body of piston 441 is installed on the piston rod, match with the internal face of cylinder barrel 442, predetermined space between cylinder barrel 442 and the piston rod is divided into two parts, and formation first pressure chamber 443 and second pressure chamber, 444, the first pressure chambers 443 are positioned at second pressure chamber, 444 belows in cylinder barrel 442.Piston 441 also is provided with and is communicated with the pressurization passageway of upper surface that first pressure chamber 443 and opening are positioned at the piston rod of piston 441.Pressurization passageway can have multiple concrete structure, and in this example, pressurization passageway is formed by the centre bore 4411 of piston rod and the pressurization hole 4412 of the connection centre bore 4411 and first pressure chamber 443.Simultaneously, cylinder barrel 442 also is provided with pressure relief vent 4421, and pressure relief vent 4421 is communicated with the space outerpace of second pressure chamber 444 and cylinder barrel 442.Like this, can be by this pressurization passageway to 443 pressurizations of first pressure chamber, second pressure chamber 444 can pass through pressure relief vent 4421 releases simultaneously; When forming predetermined pressure in first pressure chamber 443, piston 441 moves up under the pressure differential effect between first pressure chamber 443 and second pressure chamber 444.In order to keep the sealing performance of power cylinder 440, can also be at piston body and cylinder barrel 442 inwalls, the cooperation place at piston rod and cylinder barrel 442 both ends is provided with the suitable seal ring respectively.The limit inferior position of moving for positioning piston 441, be provided with locating surface down in the piston rod upper end, be provided with locating surface up in cylinder barrel 442 upper ends, locating surface down and locating surface up be inconsistent can stop piston 441 with respect to cylinder barrel 442 to lower slider, make piston 441 can remain on predetermined limit inferior position.
In this example, deliver tubing string 500 and link to each other, therefore, need the piston rod of piston 441 to connect cylinder barrel 442, and slidably cooperate respectively, and in cylinder barrel 442, form first pressure chamber 443 and second pressure chamber 444 with the upper end and the bottom of cylinder barrel 442 with cylinder barrel 442.When delivery tubing string 500 links to each other with the piston rod of piston 441, also can make second pressure chamber 444 be hatch frame, piston 441 piston rods only are slidingly matched with the cylinder barrel lower part, can form pressure differential equally, and driven plunger 441 moves up.
The piston-rod lower end of center-pole 430 upper ends and piston 441 is fixed.Expansion tube 410 is enclosed within outside the center-pole 430, and between the male cone (strobilus masculinus) of the lower surface of cylinder barrel 442 and expansion cone 420, be that the male cone (strobilus masculinus) with the lower surface of cylinder barrel 442 and expansion cone 420 is relative respectively for upper surface and the lower surface of expansion tube 410, preferably, make the upper surface of expansion tube 410 and lower surface inconsistent with the male cone (strobilus masculinus) of the lower surface of cylinder barrel 442 and expansion cone 420 respectively, thereby keep expansion tube 410 and expansion cone 420 relative fixed.For the ease of regulating suitable distance between cylinder barrel 442 lower surfaces and expansion cone 420 male cone (strobilus masculinus)s,, can make between the lower end of center-pole 430 upper ends and the piston rod of piston 441 to link to each other by screw thread to hold expansion tube 410; By center of rotation bar 430, just can change the distance between cylinder barrel 442 and the expansion cone 420; In this example, also be provided with nut 421, by nut 421 expansion cone 420 be fixed on the center-pole 430, adjusting nut 420 also can change the distance between cylinder barrel 442 and the expansion cone 420; In addition, can also make between expansion cone 420 and the center-pole 430 directly to link to each other, also can realize adjusting the purpose of distance between cylinder barrel 442 and the expansion cone 420 by screw thread.
Please refer to Fig. 7, this figure is the operating principle schematic diagram of expansion tube assembly shown in Fig. 6.Under pressure differential effect between first pressure chamber 443 and second pressure chamber 444, piston 441 can spur expansion cone 420 by center-pole 430 and move up with respect to expansion tube 410, under the effect of expansion cone 420 male cone (strobilus masculinus)s, expansion tube 410 begins radial dilatation from the lower end, produce extruding between the internal face of outside wall surface and basic sleeve pipe 100, expansion tube 410 and basic sleeve pipe 100 are fixed together.
The process of utilizing above-mentioned expansion tube assembly to carry out oil well subsidy construction may further comprise the steps:
The first, will put into the preposition of basic sleeve pipe 100 under the expansion tube assembly.
The second, make first pressure chamber produce predetermined pressure by suitable fluid pressure line, 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 3rd, utilize milling tool to mill not radial dilatation part of expansion tube 410.
Equally, because expansion cone has above-mentioned technique effect, the above-mentioned expansion tube assembly with this expansion cone also has the corresponding techniques effect.
The above only is a preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, for example, the overall size of each several part can be selected according to the needs of practical function; successfully to pass in and out basic sleeve pipe, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (9)
1. the expansion cone of an expansion tube assembly, comprise first contact-segment, described first contact-segment is the conical section of upper end external diameter less than its lower end external diameter, it is characterized in that, also comprise second contact-segment that is positioned at first contact-segment below, the external diameter of the described second contact-segment lower end is greater than the external diameter of the first contact-segment lower end.
2. the expansion cone of expansion tube assembly according to claim 1 is characterized in that, also comprises first section of setting upright that the upper end links to each other with the lower end of first contact-segment, and described first section of setting upright is the cylindrical segment that external diameter equates with the first contact-segment lower end external diameter.
3. the expansion cone of expansion tube assembly according to claim 1 and 2 is characterized in that, described second contact-segment is the cylindrical segment that the upper end external diameter equates with its lower end external diameter.
4. the expansion cone of expansion tube assembly according to claim 1 and 2 is characterized in that, described second contact-segment is the conical section of upper end external diameter less than its lower end external diameter.
5. the expansion cone of expansion tube assembly according to claim 4 is characterized in that, the tapering of described second contact-segment is less than the tapering of first contact-segment.
6. the expansion cone of expansion tube assembly according to claim 4 is characterized in that, also comprises second section of setting upright that the upper end links to each other with the lower end of second contact-segment, and described second section of setting upright is the cylindrical segment that external diameter equates with the second contact-segment lower end external diameter.
7. the expansion cone of expansion tube assembly according to claim 1 and 2 is characterized in that, distance is between 30mm～35mm between the upper end of the lower end of described first contact-segment and second contact-segment.
8. an expansion tube assembly comprises expansion tube and central tube, it is characterized in that, also comprises the expansion cone of each described expansion tube assembly of claim 1-7, and the upper end of described expansion cone links to each other with central tube, and is positioned at expansion tube.
9. an expansion tube assembly comprises expansion tube, center-pole and power cylinder, and described power cylinder comprises cylinder barrel and piston, and the piston rod of described piston slidably cooperates with the bottom of cylinder barrel; The piston body of described piston is installed on the piston rod, and matches with the internal face of described cylinder barrel, forms first pressure chamber in cylinder barrel; Described center-pole upper end links to each other with the lower end of piston rod; Described piston has and is communicated with the pressurization passageway that first pressure chamber, opening are positioned at the upper surface of described piston rod, it is characterized in that also comprise the expansion cone of each described expansion tube assembly of claim 1-7, described expansion cone is installed on the described center-pole; Described expansion tube is enclosed within outside the center-pole, and between the male cone (strobilus masculinus) of first contact-segment of the lower surface of described cylinder barrel and expansion cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010291660268U CN201695977U (en) | 2010-02-03 | 2010-02-03 | Expansion cone of expansion pipe assembly and expansion pipe assembly employing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010291660268U CN201695977U (en) | 2010-02-03 | 2010-02-03 | Expansion cone of expansion pipe assembly and expansion pipe assembly employing same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201695977U true CN201695977U (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010291660268U Expired - Lifetime CN201695977U (en) | 2010-02-03 | 2010-02-03 | Expansion cone of expansion pipe assembly and expansion pipe assembly employing same |
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| Country | Link |
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| CN (1) | CN201695977U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604516A (en) * | 2015-12-30 | 2016-05-25 | 中国石油天然气股份有限公司 | Self-expanding patching device and method for oil well casing |
| CN106869846A (en) * | 2017-02-24 | 2017-06-20 | 中国石油化工股份有限公司 | A kind of down-hole casing subsidizes method |
| CN110029955A (en) * | 2019-04-28 | 2019-07-19 | 河北工业大学 | Reducing type expansion-head and expansion tube swelling operation expansion device |
-
2010
- 2010-02-03 CN CN2010291660268U patent/CN201695977U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105604516A (en) * | 2015-12-30 | 2016-05-25 | 中国石油天然气股份有限公司 | Self-expanding patching device and method for oil well casing |
| 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 |
| CN106869846A (en) * | 2017-02-24 | 2017-06-20 | 中国石油化工股份有限公司 | A kind of down-hole casing subsidizes method |
| CN106869846B (en) * | 2017-02-24 | 2023-01-03 | 中国石油化工股份有限公司 | Underground casing patching method |
| CN110029955A (en) * | 2019-04-28 | 2019-07-19 | 河北工业大学 | Reducing type expansion-head and expansion tube swelling operation expansion device |
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