CN206530322U - Down-hole casing twin-stage bores expansion gear - Google Patents
Down-hole casing twin-stage bores expansion gear Download PDFInfo
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- CN206530322U CN206530322U CN201621428493.XU CN201621428493U CN206530322U CN 206530322 U CN206530322 U CN 206530322U CN 201621428493 U CN201621428493 U CN 201621428493U CN 206530322 U CN206530322 U CN 206530322U
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Abstract
Down-hole casing twin-stage of the present utility model bores expansion gear, including one-stage expansion cone, compound expansion cone, central tube, connect the parts such as outer tube, position-limit mechanism and top stop, central tube is main to be made up of splined shaft, double-deck inner tube, connection inner tube etc., and its double-deck inner tube is constituted including center Li Guanhe centers outer tube.When one-stage expansion occurs for expansion sleeve, one-stage expansion cone is jointly up along central tube together with connection outer tube, top stop, spacing rear completion one-stage expansion；During generation compound expansion, compound expansion cone, central tube, position-limit mechanism versus primary expansion cone are up, two grades it is spacing after terminate single stroke expansion；By repeating twin-stage expansion stroke, the hydraulic buckling of expansion sleeve is completed by several times, until expansion sleeve is fully completed expansion.The utility model effectively can decline low bulk power by cased well, with expansion sleeve to be expanded to bigger possibility, reduce construction risk, in the expansion sleeve operation that the fields such as well workover, completion and drilling well closure are subsidized available for expansion sleeve.
Description
Technical field
The utility model is related to the expansion tube apparatus for work in oil drilling completion technique field, more particularly to a kind of underground
Sleeve pipe twin-stage bores expansion gear.
Background technology
In old filed development process, the problems such as new well hardly possible is beaten, old well difficulty is repaiied is faced, in order to obtain the interior latus rectum of maximum,
Sometimes casing patching and special process completion etc. can be carried out using expansion sleeve, casing repairing is carried out to many casing damaged wells,
Completion practice can be carried out to sidetracked hole, deepened well etc., while meeting lost-circulation zone, high pressure zone, slough formation etc. again to being bored in drilling process
It is also a kind of very effective formation shut-off method using expansion sleeve closure during miscellaneous stratum.However, due to stratum and underground shape
Condition is complicated and changeable, sleeve pipe can be expanded often the higher situation of operational pressure is expanded in underground, to expansion screw, surface line
With the pressure-bearing instrument such as equipment and equipment increase construction risk, or even cause to cause sleeve pipe effectively swollen because the bulbs of pressure are too high
Swollen, the hose expansion operating risk such as unsuccessfully.
At present, the expansion sleeve of conventional expansion rate general expansion cone using a fixed dimension in expansion process is completed
The underground expansion operation of expansion sleeve, run into during expansion the bulbs of pressure it is too high when can only be combined by hydraulic pressure and mechanical pull
Mode is solved, and actually still can not effectively reduce the bulbs of pressure of sleeve pipe.And another expansion rate it is larger wait hole diameter expansion sleeve
Guan Ze is expanded using variable radial expansion tool to hole diameters such as expansion sleeve progress, and its hose expansion rate is bigger, is mainly used in without interior
The drilling well closure of footpath loss, such as publication number CN104005725A patent discloses a kind of expansion tube twin-stage expansion gear, used
Be sizing expansion-head and reducing expansion-head twin-stage expansion mechanism, its sizing expansion-head and reducing expansion-head are in hydraulic action
Moved when similarly hereinafter, complete the isometrical expansion of sleeve pipe, fail the expansive force of effectively reduction sleeve pipe, and reducing expansion-head and fluid cylinder system
The structure of system is excessively complicated, is not suitable for the expansion sleeve system of conventional expansion rate.Therefore, no matter fixed dimension expansion cone is used
Or reducing expansion cone is used, as long as an expansion rate of casing pipe is constant, its bulbs of pressure cannot be reduced effectively, by swollen
The high-voltage construction risk that swelling pressure power height is brought just is difficult to effective reduction, is unfavorable for the expansion construction operation of sleeve pipe.
Utility model content
The problem such as the bulbs of pressure that are faced when being expanded for existing expansion sleeve are excessive, solves to press during down-hole casing expansion
Power is too high and the problems such as cause expansion screw cracky, surface line and operating tool string pressure-bearing risk, a kind of well of utility model
Setting of casing twin-stage bores expansion gear, by twin-stage expansion cone mechanism, expansion tube is realized into staged expansion, so as to reduce under cased well
The bulbs of pressure, reduce construction risk.
Down-hole casing twin-stage of the present utility model bores expansion gear, including one-stage expansion cone 2, compound expansion cone 3, central tube
28th, connection outer tube 7, position-limit mechanism 8 and top stop 9, wherein：Central tube is the hollow-core construction of two sections of compositions, and epimere is connection
Inner tube 6, hypomere is double-deck inner tube 5, and the double-deck lower end of inner tube 5 is fixedly connected with splined shaft 4, and double-deck inner tube 5 is provided with shaft orientation flowing channel,
The double-deck outer tube wall upper and lower end parts of inner tube 5 are respectively equipped with inlet opening 15 and lower inlet opening 16, upper inlet opening 15 and lower inlet opening 16
With shaft orientation flowing channel insertion；It is installed with connection inner tube 6 and the double-deck linkage section of inner tube 5 in a position-limit mechanism 8, position-limit mechanism 8
Provided with feed pathway 26, top inlet opening 14 is provided with connection inner tube 6 bottom, it is top inlet opening 14 and feed pathway 26, enterprising
Fluid apertures 15, shaft orientation flowing channel, the insertion of lower inlet opening 16；The maximum outside diameter of one-stage expansion cone 2 is less than compound expansion and bored outside 3 maximum
Footpath；One-stage expansion cone 2 and compound expansion cone about 3 are sleeved on outside the double-deck inner tube 5 on the top of splined shaft 4 successively, one-stage expansion cone 2
The sealing that slides axially is constituted with double-deck inner tube 5 to coordinate；One-stage expansion is bored 2 tops and is connected with being connected outer tube 7, and connection outer tube 7 is with
The cooperation of the interval of heart pipe 28, the sealing cooperation that slides axially is constituted at the top of connection outer tube 7 by top stop 9 with being connected inner tube 6；Limit
Position mechanism 8 is located in connection outer tube 7 and the annular space of central tube 28；The connection upper and lower end parts of outer tube 7 are respectively equipped with outage 17 with
Outage 18；The lower inlet opening 16 of double-deck inner tube 5 is located between 3 pairing portions of one-stage expansion cone 2 and compound expansion cone；One-stage expansion
Cone 2, connection outer tube 7 and top stop 9 constitute linkage, and splined shaft 4, compound expansion cone 3, double-deck inner tube 5 and connection inner tube 6 are constituted
Linkage.
Down-hole casing twin-stage cone expansion gear of the present utility model also includes seal plug 19, and seal plug 19 passes through spline
Groove coordinates with splined shaft 4.
Said apparatus further comprises：
The seal plug 19 is provided with axial passage, and passway is provided with sealed ball seat, and the external diameter of ball sealer 20 is less than central tube
28 internal diameters and more than passway internal diameter.
The shaft orientation flowing channel of double-deck inner tube 5 Guan12He centers outer tube 13 in center constitutes inner ring hollow structure closed at both ends.
Connection outer tube 7 in the annular space of central tube 28 with being respectively installed with annulus component 10 and lower annulus component 11, upper circle
Ring assemblies 10 and lower annulus component 11 are respectively provided in the upper and lower annular space of position-limit mechanism 8.
The utility model has the advantage of：Make sleeve pipe occur twin-stage by one-stage expansion cone and compound expansion cone to expand, subtract
Few sleeve pipe single-stage expansion rate, so as to effectively reduce casing expandable pressure；By repeatedly expansion stroke, full well section sleeve pipe is completed
Staged expansion, solve down-hole casing expansion when hypertonia and cause expansion screw cracky, surface line and operating tool string
The problems such as pressure-bearing risk, so as to reduce the bulbs of pressure under cased well, reduce construction risk.
Brief description of the drawings
Fig. 1 is that down-hole casing twin-stage bores expansion gear close-up schematic view
Fig. 2 is the down-hole casing twin-stage cone expansion gear schematic diagram before initial bubble
Fig. 3 is that down-hole casing twin-stage bores expansion gear one-stage expansion schematic diagram
Fig. 4 is that down-hole casing twin-stage bores expansion gear compound expansion schematic diagram
Fig. 5 is schematic diagram after the cone expansion gear twin-stage expansion of down-hole casing twin-stage
In figure：1. expansion sleeve, 2. one-stage expansions cone, 3, compound expansion cone, 4. splined shafts, 5. double-deck inner tubes, 6. connections
In inner tube, 7. connection outer tubes, 8. position-limit mechanisms, 9. top stops, annulus component on 10., 11. times annulus components, 12. centers
Manage, 13. center outer tubes, 14. top inlet openings, inlet opening on 15., 16. times inlet openings, outage on 17., 18. times outages,
19. seal plug, 20. ball sealers, 21. expansion starters, the 22. one-stage expansion conical surfaces, the 23. compound expansion conical surfaces, 24. one-levels are swollen
Swollen chamber, 25. compound expansion chambers, 26. feed pathways, 27. seal assemblies, 28. central tubes.
Embodiment
Utility model is further described in conjunction with Figure of description.
Fig. 1 schematically shows one embodiment knot that expansion gear is bored according to down-hole casing twin-stage of the present utility model
Structure.Including expansion sleeve 1, one-stage expansion cone 2, compound expansion cone 3, central tube 28, connection outer tube 7, position-limit mechanism 8 and top gear
The grade part of block 9.
Central tube 28 includes the parts such as splined shaft 4, double-deck inner tube 5, connection inner tube 6, splined shaft 4, double-deck inner tube 5 and connection
Inner tube 6 is sequentially connected composition, and one position-limit mechanism 8 is provided with connection inner tube 6 and the double-deck junction of inner tube 5.One-stage expansion cone 2
It is arranged on compound expansion cone 3 on splined shaft 4 and double-deck inner tube 5, one-stage expansion is bored 2 tops and is connected with being connected outer tube 7, and connection is outer
The top of pipe 7 is fixedly connected with top stop 9, and top stop 9 is located between connection outer tube 7 and connection inner tube 6, position-limit mechanism 8
In in connection outer tube 7 and the annular space of central tube 28.One-stage expansion cone 2, connection outer tube 7 and top stop 9 can one under hydraulic action
With motion, compound expansion cone 3, splined shaft 4, double-deck inner tube 5 and connection inner tube 6 also can be moved together under hydraulic action.
As shown in Fig. 1~Fig. 5, the bottom of expansion sleeve 1 is the expansion starter 21 of a twin-stage bell mouth shape, and top is not swollen
Swollen expansion sleeve 1, expansion starter 21 has realized that twin-stage expands in advance, and its twin-stage inflated outer diameter is all higher than the expansion before expansion
The external diameter of sleeve pipe 1, for preset various sizes of one-stage expansion cone 2 and compound expansion cone 3, expansion starter 21 bottom is provided with close
Block head 19, seal plug 19 is coordinated by internal splines groove with the splined shaft 4 on central tube 28.One-stage expansion bores 2 and two grades
Expansion cone 3 is preset in inside expansion starter 21, and one-stage expansion cone 2 is located at top, and it expands the one of the conical surface and expansion sleeve 1
The level expansion conical surface 22 coordinates, and compound expansion cone 3 is located at one-stage expansion and bores 2 bottoms, and it is swollen that whole expansion pipe column weight acts on one-level
The swollen conical surface 22 and the compound expansion conical surface 23, support and tripping in that the conical surface realizes expansion pipe column are expanded by twin-stage.
As shown in Fig. 1~Fig. 5, described down-hole casing twin-stage cone expansion gear, its double-deck inner tube 5 includes pipe 12 in center
Constituted with center outer tube 13, feed pathway 26 is provided with position-limit mechanism 8, process the top inlet opening in connection inner tube 6 bottom
The 14 upper inlet opening 15 with processing on the top of center outer tube 13 is respectively positioned in position-limit mechanism 8, and connected with feed pathway 26, processes
Lower inlet opening 16 in the bottom of center outer tube 13 is located between one-stage expansion cone 2 and compound expansion cone 3, and liquid can enter at top
Fluid course is formed between feed pathway 26, upper inlet opening 15 and lower inlet opening 16 in fluid apertures 14, position-limit mechanism 8, into one-level
Expansion chamber 24.
As shown in Fig. 1~Fig. 5, described down-hole casing twin-stage cone expansion gear, it connects the processing of the upper and lower part of outer tube 7
There are upper outage 17 and lower outage 18, annulus component 10, upper annulus are installed in connection inner tube 6 and the connection annular space of outer tube 7
Component 10 is located between top stop 9 and position-limit mechanism 8, and upper annulus component 10 can be moved along connection inner tube 6, in connection outer tube 7
Lower annulus component 11 is equally installed with the annular space of center outer tube 13, lower annulus component 11 can be moved along double-deck inner tube 5.Upper annulus group
Part 10 and lower annulus component 11 can be in central tubes 28 and the annular space activity of connection outer tube 7, as central tube 28 is gathered or scatters, number
Amount can be 3~8, and auxiliary stopper mechanism 8 carries out spacing during for expanding, and can also be changed to some sphere structures.
Down-hole casing twin-stage cone expansion gear as shown in Fig. 1~Fig. 5, when one-stage expansion occurs for expansion sleeve 1, one-level
Expansion cone 2 is common up along central tube 28 together with connection outer tube 7, top stop 9, and lower annulus component 11 is gathered to position-limit mechanism 8
Place forms that one-level is spacing, and the liquid of connection outer tube 7 and the double-deck annular space of inner tube 5 is discharged through lower outage 18；When its two grades of generation is swollen
When swollen, compound expansion cone 3, central tube 28, the versus primary expansion cone 2 of position-limit mechanism 8 are up, and the liquid in one-stage expansion chamber 24 is anti-
To discharge, upper annulus component 10, which is gathered to top stop 9, occurs two grades of spacing, liquid between connection outer tube 7 and connection inner tube 6
Discharged through upper outage 17.
As shown in Fig. 1~Fig. 5, described down-hole casing twin-stage cone expansion gear, its top stop 9 is with being connected outer tube 7, connecting
Connect and seal assembly 27 is mounted between inner tube 6, sealing is also installed between one-stage expansion cone 2 and compound expansion cone 3 and connection outer tube 7
Component 27.
The operational method of expansion sleeve is realized using the utility model device, is comprised the following steps：
Step one：Device is assembled.Bored first according to one-stage expansion, compound expansion cone specification in expansion sleeve end
Process and bore supporting expansion starter with one-stage expansion cone, compound expansion, down-hole casing twin-stage is bored into expansion gear along expansion
In starter insertion expansion sleeve, finally it is fixedly connected with seal plug with expansion starter lower end.As shown in Figure 1.
Step 2: device tripping in.As shown in Fig. 2 after well drifting, accompanied using oil pipe or drilling rod, down-hole casing is double
To precalculated position under level cone expansion gear, circulation, according to hole condition and design requirement, can first carry out well cementing operation.
Step 3: throwing at ball sealer 20 or plug to seal plug 19, pressure is played, liquid is entered out of central tube 28 by top
Fluid apertures 14, the feed pathway 26 of position-limit mechanism 8, upper inlet opening 15 and lower inlet opening 16, into one-stage expansion chamber 24.
Step 4: one-stage expansion.As shown in figure 3, after liquid reaches one-stage expansion chamber 24, one-stage expansion cone 2 is in hydraulic pressure
Under effect, moved upwards in advance along central tube 28, drive connection outer tube 7 and top stop 9 together up, send out expansion sleeve 1
Raw one-stage expansion.3 tops are bored because one-stage expansion cone 2 is located at compound expansion, and the pressure of one-stage expansion occurs for expansion sleeve 1
The pressure of compound expansion occurs less than it, therefore, under hydraulic work, one-stage expansion occurs for expansion sleeve 1 prior to compound expansion.
Step 5: one-level is spacing.When one-stage expansion occurs for expansion sleeve 1, lower annulus component 11 is also up therewith to be gathered,
And without relative displacement between central tube 28 and compound expansion cone 3 and expansion sleeve 1, treat that one-stage expansion cone is 2 up, and by lower annulus
When the arrangement of component 11 is compressed at position-limit mechanism 8, realize that one-stage expansion is spacing, one-stage expansion cone 2 can not continue up, expansion sleeve
Pipe 1 completes one-stage expansion, sees Fig. 3.
Step 6: compound expansion.As shown in figure 4, after expansion sleeve 1 completes one-stage expansion, in compound expansion chamber 25
Highly pressurised liquid promotes compound expansion cone 3 to move, up together with splined shaft 4, double-deck inner tube 5, connection inner tube 6 and position-limit mechanism 8, makes
Compound expansion occurs for expansion sleeve 1；And now, one-stage expansion bores 2 relative expansion sleeve pipes 1 and relative motion, upper annulus group does not occur
Part 10 is up to be drawn close to top stop 9, and lower annulus component 11 progressively scatters.
Step 7: two grades spacing.Terminate an expansion stroke.As shown in figure 5, treating that annulus component 10 goes upward to top and kept off
During block 9, upper annulus component 10 is limited between top stop 9 and position-limit mechanism 8, forms two grades of spacing, one-stage expansion cones 2 and two
Level expansion cone 3 reaches original state position, and expansion sleeve 1 completes compound expansion, terminates the twin-stage of an expansion sleeve 1 expansion row
Journey.
Step 8: four~step 7 of repeat step, repeats twin-stage expansion stroke, point twin-stage completes the hydraulic pressure of expansion sleeve 1
Expansion, until expansion sleeve 1 is fully completed expansion.
As shown in Fig. 1~Fig. 5, in one embodiment, described down-hole casing twin-stage cone expansion gear, according to finite element
Sunykatuib analysis result, by taking Φ 193.7mm expansion sleeves as an example, when its expansion rate is 16%, twin-stage bores expansive force compared with single-stage expansion
Power reduction about 45%；When Φ 139.7mm expansion sleeves expansion rate is 27%, then twin-stage expansive force reduces about 48% compared with single-stage expansion power,
Expansive force can be effectively reduced, with expansion sleeve 1 to be expanded to bigger possibility.
The utility model can be used for the expansion sleeve operation in the fields such as expansion sleeve subsidy well workover, completion and drilling well closure
In, expansion sleeve is occurred twin-stage by one-stage expansion cone and compound expansion cone and expand, reduce expansion sleeve single-stage expansion rate, from
And effectively reduce the expansion sleeve bulbs of pressure；By repeatedly expansion stroke, the staged expansion of full well section expansion sleeve is completed,
So as to reduce the expansion sleeve underground bulbs of pressure, construction risk is reduced.
Claims (5)
1. a kind of down-hole casing twin-stage bores expansion gear, including one-stage expansion cone [2], compound expansion cone [3], central tube [28],
Outer tube [7], position-limit mechanism [8] and top stop [9] are connected, it is characterized in that：Central tube is the hollow-core construction of two sections of compositions, epimere
For connection inner tube [6], hypomere is double-deck inner tube [5], and double-deck inner tube [5] lower end is fixedly connected with splined shaft [4], double-deck inner tube
[5] shaft orientation flowing channel is provided with, outer tube wall upper and lower end parts are respectively equipped with upper inlet opening [15] and lower inlet opening in double-deck inner tube [5]
[16], upper inlet opening [15] and lower inlet opening [16] and shaft orientation flowing channel insertion；In connection inner tube [6] and double-deck inner tube [5] connection
Section, which is installed with a position-limit mechanism [8], position-limit mechanism [8], is provided with feed pathway [26], is provided with connection inner tube [6] bottom
Top inlet opening [14], top inlet opening [14] and feed pathway [26], upper inlet opening [15], shaft orientation flowing channel, lower inlet opening
[16] insertion；The maximum outside diameter of one-stage expansion cone [2] is less than the maximum outside diameter that [3] are bored in compound expansion；One-stage expansion bores [2] and two
Level expansion cone [3] is sleeved on the double-deck inner tube [5] on splined shaft [4] top outside successively up and down, one-stage expansion cone [2] and double-deck inner tube
[5] sealing that slides axially is constituted to coordinate；One-stage expansion is bored [2] top and is connected with being connected outer tube [7], connection outer tube [7] and center
Manage [28] interval to coordinate, the sealing that slides axially is constituted with being connected inner tube [6] by top stop [9] at the top of connection outer tube [7]
Coordinate；Position-limit mechanism [8] is located in connection outer tube [7] and central tube [28] annular space；Connection outer tube [7] upper and lower end parts are respectively equipped with
Upper outage [17] and lower outage [18]；The lower inlet opening [16] of double-deck inner tube [5] is located at one-stage expansion cone [2] and two grades swollen
Between swollen cone [3] pairing portion；One-stage expansion cone [2], connection outer tube [7] and top stop [9] constitute linkage, splined shaft [4], two
Level expansion cone [3], double-deck inner tube [5] and connection inner tube [6] constitute linkage.
2. down-hole casing twin-stage as claimed in claim 1 bores expansion gear, it is characterized in that：Also include seal plug [19], it is close
Block head [19] is coordinated by spline and splined shaft [4].
3. down-hole casing twin-stage as claimed in claim 2 bores expansion gear, it is characterized in that：The seal plug [19] is provided with axle
To passage, passway is provided with sealed ball seat, and ball sealer [20] external diameter is less than central tube [28] internal diameter and more than passway internal diameter.
4. the down-hole casing twin-stage cone expansion gear as described in claim 1,2 or 3, it is characterized in that：The axle of double-deck inner tube [5]
[12] are managed in center and center outer tube [13] constitutes inner ring hollow structure closed at both ends to runner.
5. the down-hole casing twin-stage cone expansion gear as described in claim 1,2 or 3, it is characterised in that：Outer tube [7] is connected with
Annulus component [10] and lower annulus component [11], upper annulus component [10] and lower circle are respectively installed with the annular space of heart pipe [28]
Ring assemblies [11] are respectively provided in position-limit mechanism [8] upper and lower annular space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621428493.XU CN206530322U (en) | 2016-12-24 | 2016-12-24 | Down-hole casing twin-stage bores expansion gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621428493.XU CN206530322U (en) | 2016-12-24 | 2016-12-24 | Down-hole casing twin-stage bores expansion gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206530322U true CN206530322U (en) | 2017-09-29 |
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ID=59922352
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621428493.XU Active CN206530322U (en) | 2016-12-24 | 2016-12-24 | Down-hole casing twin-stage bores expansion gear |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240205A (en) * | 2016-12-24 | 2018-07-03 | 中石化石油工程技术服务有限公司 | Down-hole casing twin-stage bores expansion device and its operational method |
| CN111677480A (en) * | 2020-06-04 | 2020-09-18 | 大庆油田有限责任公司 | Double-acting control valve for casing patching |
-
2016
- 2016-12-24 CN CN201621428493.XU patent/CN206530322U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108240205A (en) * | 2016-12-24 | 2018-07-03 | 中石化石油工程技术服务有限公司 | Down-hole casing twin-stage bores expansion device and its operational method |
| CN108240205B (en) * | 2016-12-24 | 2023-09-12 | 中石化石油工程技术服务有限公司 | Underground casing two-stage cone expansion device and operation method thereof |
| CN111677480A (en) * | 2020-06-04 | 2020-09-18 | 大庆油田有限责任公司 | Double-acting control valve for casing patching |
| CN111677480B (en) * | 2020-06-04 | 2022-11-08 | 大庆油田有限责任公司 | Double-acting control valve for casing patching |
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