CN107503701A - A kind of casing damaged well light-wall pipe patch device - Google Patents
A kind of casing damaged well light-wall pipe patch device Download PDFInfo
- Publication number
- CN107503701A CN107503701A CN201710772415.4A CN201710772415A CN107503701A CN 107503701 A CN107503701 A CN 107503701A CN 201710772415 A CN201710772415 A CN 201710772415A CN 107503701 A CN107503701 A CN 107503701A
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- Prior art keywords
- expansion cone
- patching tube
- conical section
- damaged well
- casing damaged
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- 238000007789 sealing Methods 0.000 claims abstract description 62
- 239000000463 material Substances 0.000 claims description 11
- 238000004073 vulcanization Methods 0.000 claims description 10
- 238000005516 engineering process Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 7
- 230000008439 repair process Effects 0.000 abstract description 7
- 238000005553 drilling Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241000237942 Conidae Species 0.000 description 1
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical compound C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
- E21B29/10—Reconditioning of well casings, e.g. straightening
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a kind of casing damaged well light-wall pipe patch device,Belong to casing repair technology field,Including patching tube,Lower end is arranged on the expansion cone inside patching tube,The upper sealing ring for being arranged on the outer wall upper end of patching tube and the lower sealing ring for the outer wall lower end for being arranged on patching tube,Wherein,Conical section cooperates with the first conical section in the middle part of expansion cone,High voltage power liquid is injected into the inner chamber between expansion cone and patching tube by the centrally disposed through hole of swollen cone,Under the driving of difference force,Expansion cone is moved from the lower to upper part of patching tube,Expansion cone is during patching tube internal motion,So that patching tube constantly expands,Until patching tube fits with sleeve pipe,And deformation of the patching tube under expansion cone effect is permanent deformation,Realize that the light-wall pipe of casing damaged well strengthens the repairing with leak,Sealing effectiveness after casing damaged well reparation is ensured using upper sealing ring and lower sealing ring,Reduce the rehabilitation cost of casing damaged well and repair difficulty,Extremely significantly reduce drilling cost.
Description
Technical field
The present invention relates to casing repair technology field, more particularly to a kind of casing damaged well light-wall pipe patch device.
Background technology
During the entire process of carrying out oil exploration and oil and gas development, often due to the plastic deformation on stratum, perforation, corruption
The factors such as erosion, casing wear, ultimately result in the generation of casing failure phenomenon so that oil gas well production greatly reduces, and can lead
Payzone pollution is caused, even more serious is exactly to cause oil well to scrap.With deepening continuously for oil field development process, will greatly increase
The possibility of casing damage in oil-water well, generate great threat.Casing failure well, referred to as casing damaged well, once occur this
Problem, the normal production in oil field will be had a strong impact on, produce greatly harm.
Specifically, one side exploration and development difficulty is increasingly lifted, drilling condition becomes more severe, more ultra-deep occurs
Well, deep-well, extended reach well, horizontal well etc., these oil well conditions are harsh so that oil, sleeve pipe are generally all to exceed the expected time
Still under arms；On the other hand, related preventive means is not yet optimized, in particular for before going into the well and during going into the well,
Sleeve pipe is subject to destroy, it is necessary to the measure of being effectively protected is taken, but it is barely satisfactory always in terms of set damages preventing and treating, not yet take
Gratifying achievement is obtained, sleeve pipe damage problem still shows the trend risen year by year., will under permanent water erosion
Cause shale, mud stone constantly to be expanded by water, cause crustal rise and fall, formation slippage or Rock Mass, so that sleeve pipe is sent out
The situation of raw bad break.In addition, because sleeve pipe uses metal material, under the complex environment of underground, easily with it is beneath some
Material is acted on, and causes sleeve pipe to be gradually corroded, and finally causes its leakage.Once these situations occur, for leakage and
The sleeve pipe of bad break, it is necessary to take active and effective means to save the situation, protect layer of oil gas production, realization re-starts production, reduces economic
Loss.
In prior art, the repairing of casing damaged well mainly take casing patching, lower 4 cun of casing reinforcements, lower packet isolation or
The modes such as person's squeeze method are simply remedied, and wherein casing patching technology mainly includes the subsidy of hydraulic technique suspension type, blast
Air pressure subsidizes technology and bellows subsidy technology etc..But the either subsidy of hydraulic technique suspension type or blast air pressure is mended
Patch technology and bellows subsidy technology, when carrying out casing repairing to casing damaged well, its repairing effect is general, and rehabilitation cost
It is high.
The content of the invention
The embodiment of the present invention provides a kind of casing damaged well light-wall pipe patch device, it is intended to improves the repairing effect of casing damaged well, protects
The sealing effectiveness after casing damaged well is repaired is demonstrate,proved, the rehabilitation cost of casing damaged well is reduced and repairs difficulty, further extremely significant drop
Low drilling cost.
Concrete technical scheme provided by the invention is as follows：
On the one hand, the embodiment of the present invention provides a kind of casing damaged well light-wall pipe patch device, the casing damaged well light-wall pipe subsidy
Device includes expansion cone that patching tube, lower end be arranged on inside the patching tube, is arranged on the outer wall upper end of the patching tube
Upper sealing ring and be arranged on the patching tube outer wall lower end lower sealing ring, wherein, the patching tube include the first cylindrical section,
The first conical section being connected with first cylindrical section, the second cylinder being connected with the small end of first conical section are held greatly
Section and the bottom plate for being arranged on the first cylindrical section bottom, the expansion cone include expansion cone bottom cylindrical section, expansion cone middle part
Conical section and expansion cone top cylindrical section, expansion cone bottom cylindrical section are connected with the big end of conical section in the middle part of the expansion cone
Connect, the expansion cone top cylindrical section is connected with the small end of conical section in the middle part of the expansion cone；The center of the expansion cone is set
Through hole is equipped with, the through hole connects the inner chamber of the patching tube.
Optionally, first conical section is identical with the taper of conical section in the middle part of the expansion cone.
Optionally, the contact cone angle between first conical section and expansion cone middle part conical section is 10 °.
Optionally, the size of the big end external diameter of conical section and the big end internal diameter of first conical section in the middle part of the expansion cone
It is identical.
Optionally, the material of the upper sealing ring is vulcanization rubber, and the material of the lower sealing ring is vulcanization rubber.
Optionally, the external diameter of internal diameter and the patching tube that the external diameter of the patching tube is less than sleeve pipe is more than described sleeve pipe
The 3/4 of internal diameter.
Optionally, the length of conical section is more than the length of first conical section in the middle part of the expansion cone.
Optionally, the thickness of the patching tube is 5mm~8mm.
Optionally, the connecting portion between expansion cone bottom cylindrical section and expansion cone middle part conical section is that circular arc connects
Connect.
Optionally, the connecting portion of the bottom surface of expansion cone bottom cylindrical section and side is fillet.
Beneficial effects of the present invention are as follows：
The embodiment of the present invention provides a kind of casing damaged well light-wall pipe patch device, including patching tube, lower end are arranged on patching tube
Internal expansion cone, the upper sealing ring of outer wall upper end for being arranged on patching tube and the lower sealing for the outer wall lower end for being arranged on patching tube
Ring, wherein, patching tube includes the first cylindrical section, the first conical section, the second cylindrical section and the bottom for being arranged on the first cylindrical section bottom
Plate, expansion cone include expansion cone bottom cylindrical section, expansion cone middle part conical section and expansion cone top cylindrical section, expansion cone middle part circle
Bore section to cooperate with the first conical section, by the centrally disposed through hole of swollen cone into the inner chamber between expansion cone and patching tube
High voltage power liquid is injected, under the driving of difference force, expansion cone is moved from the lower to upper part of patching tube, and expansion cone is in patching tube
During internal motion so that patching tube constantly expands, until patching tube fits with sleeve pipe, and patching tube is in expansion cone
Deformation under effect is permanent deformation, in the presence of upper sealing ring and lower sealing ring, is realized between patching tube and sleeve pipe
Sealing, realize that the light-wall pipe of casing damaged well strengthens the repairing with leak, casing damaged well reparation is ensured using upper sealing ring and lower sealing ring
Sealing effectiveness afterwards, reduce the rehabilitation cost of casing damaged well and repair difficulty, extremely significantly reduce drilling cost.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of cross section structure diagram of casing damaged well light-wall pipe patch device of the embodiment of the present invention；
Fig. 2 is the cross section structure diagram of the patching tube of the embodiment of the present invention；
Fig. 3 is the cross section structure diagram of the expansion cone of the embodiment of the present invention；
Fig. 4 is the contact cone angle and contact and driving pressure of the casing damaged well light-wall pipe patch device of the embodiment of the present invention
Between relation curve schematic diagram.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, the present invention is made below in conjunction with accompanying drawing into
One step it is described in detail, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole implementation
Example.Based on the embodiment in the present invention, what those of ordinary skill in the art were obtained under the premise of creative work is not made
All other embodiment, belongs to the scope of protection of the invention.
Term " first ", " second ", " the 3rd " in description and claims of this specification and above-mentioned accompanying drawing, "
Four ", " the 5th ", " the 6th ", " the 7th " and (if present)s such as " the 8 " are for distinguishing similar object, without for retouching
State specific order or precedence.It should be appreciated that the data so used can exchange in the appropriate case, to retouch here
The embodiments of the invention stated can for example be implemented with the order in addition to those for illustrating or describing herein.
In addition, term " comprising " and " having " and their any deformation, it is intended that cover it is non-exclusive include, example
Such as, process, method, system, product or the equipment for containing series of steps or unit are not necessarily limited to those clearly listed
Step or unit, but may include not list clearly or for intrinsic other of these processes, method, product or equipment
Step or unit.
To improve the repairing effect of casing damaged well, ensure the sealing effectiveness after casing damaged well reparation, the embodiment of the present invention provides
A kind of casing damaged well light-wall pipe patch device, including patching tube, lower end are arranged on expansion cone inside patching tube, are arranged on patching tube
Outer wall upper end upper sealing ring and be arranged on patching tube outer wall lower end lower sealing ring, wherein, patching tube include first circle
Shell of column, the first conical section being connected with the first cylindrical section, the second cylindrical section being connected with the small end of the first conical section are held greatly
With the bottom plate for being arranged on the first cylindrical section bottom, expansion cone includes expansion cone bottom cylindrical section, conical section and swollen in the middle part of expansion cone
Swollen cone top part cylindrical section, expansion cone bottom cylindrical section are connected with the big end of conical section in the middle part of expansion cone, expansion cone top cylindrical
Section is connected with the big end of conical section in the middle part of expansion cone；Expansion cone is provided centrally with through hole, and through hole connects the inner chamber of patching tube,
Conical section cooperates with the first conical section in the middle part of expansion cone, by the centrally disposed through hole of swollen cone to expansion cone and patching tube
Between inner chamber in inject high voltage power liquid, under the driving of difference force, expansion cone is moved from the lower to upper part of patching tube, swollen
Swollen cone is during patching tube internal motion so that patching tube constantly expands, until patching tube fits with sleeve pipe, and mends
It is permanent deformation to paste deformation of the pipe under expansion cone effect, in the presence of upper sealing ring and lower sealing ring, realizes patching tube
Sealing between sleeve pipe, realize that the light-wall pipe of casing damaged well strengthens the repairing with leak, protected using upper sealing ring and lower sealing ring
The sealing effectiveness after casing damaged well is repaired is demonstrate,proved, the rehabilitation cost of casing damaged well is reduced and repairs difficulty, extremely significant reduce is bored
Well cost.
A kind of casing damaged well light-wall pipe patch device of the embodiment of the present invention is carried out below in conjunction with 1~accompanying drawing of accompanying drawing 3 detailed
Thin explanation.
Shown in refer to the attached drawing 1, a kind of casing damaged well light-wall pipe patch device of the embodiment of the present invention, including patching tube 100, under
End be arranged on expansion cone 200 patching tube 100 inside, be arranged on patching tube 100 outer wall upper end upper sealing ring 300 and setting
Lower sealing ring 400 in the outer wall lower end of patching tube 100.With reference to shown in figure 1, wherein, the external diameter of patching tube 100 is less than sleeve pipe
500 internal diameter and the external diameter of patching tube 100 are more than the 3/4 of the internal diameter of sleeve pipe 500.If the mistake that the external diameter of patching tube 100 is set
It is small, then in the sleeve pipe 500 for the tenuity that patching tube 100 is arranged on to casing damaged well after, then need to expand patching tube 100 more
Size could realize being bonded for patching tube and sleeve pipe, then the expansive force needed is larger, be unfavorable for realizing set damage using patching tube 100
The reparation of the sleeve pipe 500 of the tenuity of well.In consideration of it, the embodiment of the present invention from external diameter be more than sleeve pipe 500 internal diameter 3/4 and
Patching tube 100 less than the internal diameter of sleeve pipe 500 carries out the reparation for damaging sleeve pipe of casing damaged well.
Wherein, it is preferred that the thickness of patching tube 100 is 5mm~8mm, if the thickness of patching tube 100 set excessively
It is thick, it will cause the intensity of patching tube excessive, it is necessary to could realize that patching tube 100 is expanded to using larger expansive force can be with
Sleeve pipe is bonded, and is unfavorable for realizing the reparation of the sleeve pipe 500 of the tenuity of casing damaged well using patching tube 100.But if will subsidy
The thickness of pipe 100 is set excessively thin, then the sleeve pipe dew point of the casing damaged well after repairing or the insufficient strength of breakage are big, can
It can cause the secondary damage after casing damaged well repairing.Just allow for this, the embodiment of the present invention is preferable, use thickness for
5mm~8mm patching tube 100 realizes the reparation of the sleeve pipe 500 of the tenuity of casing damaged well.
With reference to shown in figure 1, the material of upper sealing ring 300 is vulcanization rubber, and the material of lower sealing ring 400 is vulcanization rubber.
Wherein, the structure of patching tube 100 is annular, and upper sealing ring 300 and lower sealing ring 400 are also annular, the He of upper sealing ring 300
Lower sealing ring 400 is set on the outer wall of patching tube 100.For upper sealing ring 300 and lower sealing ring 400 in patching tube 100
Fixed form on outer wall, the embodiment of the present invention are not specifically limited, example, can be in the phase on the outer wall of patching tube 100
Answer position that sealing ring mounting groove is set, upper sealing ring 300 and lower sealing ring 400 are arranged in the mounting groove.
With reference to shown in figure 1, because the material of upper sealing ring 300 is vulcanization rubber, the material of lower sealing ring 400 is vulcanization rubber
Glue, then upper sealing ring 300 and lower sealing ring 400 can be expanded with patching tube 100, when patching tube 100 is expanded to and sleeve pipe 500
After fitting, upper sealing ring 300 and lower sealing ring 400 are pressed in top and bottom and the set of the outer wall of patching tube 100 respectively
The joint place of pipe 500, the sealing between patching tube 100 and sleeve pipe 500 is realized, because the material of upper sealing ring 300 is vulcanization rubber
Glue, the material of lower sealing ring 400 is vulcanization rubber, and its dilatancy is permanent deformation, may further ensure that patching tube 100
With the good seal between sleeve pipe 500.
With reference to shown in figure 2, patching tube 100 includes the first cylindrical section 101, big end is connected with the first cylindrical section 101 the
One conical section 102, the second cylindrical section 103 being connected with the small end of the first conical section 102 and it is arranged on the first cylindrical section 101
The bottom plate 104 of bottom, wherein, it is preferred that the first cylindrical section 101, the first conical section 102, the second cylindrical section 103 and bottom plate 104
Using being integrally formed, the structural strength of integrally formed patching tube 100 is high.With reference to shown in 1 and Fig. 2 of topic, the first cylindrical section 101,
First conical section 102, the second cylindrical section 103 and bottom plate 104 cooperate, and form the inner chamber of a sealed bottom, wherein, expansion
Cone 200 lower end be arranged in the inner chamber of patching tube 100, and expansion cone 200 can in the inner chamber of patching tube 100 on move down
It is dynamic.
With reference to shown in figure 3, expansion cone 200 includes expansion cone bottom cylindrical section 201, conical section 202 and swollen in the middle part of expansion cone
Swollen cone top part cylindrical section 203, wherein, conical section 202 and expansion cone top circle in the middle part of expansion cone bottom cylindrical section 201, expansion cone
Shell of column 203 is used and is integrally formed, conical section 202 and expansion cone in the middle part of integrally formed expansion cone bottom cylindrical section 201, expansion cone
Top cylindrical section 203, its bonding strength is high, and functional reliability is good.
With reference to shown in figure 1 and Fig. 3, expansion cone bottom cylindrical section 201 is connected with the big end of conical section 202 in the middle part of expansion cone
Connect, expansion cone top cylindrical section 203 is connected with the small end of conical section 202 in the middle part of expansion cone, and the center of expansion cone 200 is set
Through hole 204 is equipped with, through hole 204 connects the inner chamber of patching tube 100, wherein, through hole 204 is used for expansion cone 200 and patching tube 100
High voltage power liquid is injected in the sealing cavity complemented each other to form.
With reference to shown in figure 1, Fig. 2 and Fig. 3, the first conical section 102 is identical with the taper of conical section 202 in the middle part of expansion cone, its
In, it is preferred that the contact cone angle in the middle part of the first conical section 102 and expansion cone between conical section 202 is 10 °.
Present inventor passes through different size of first circle of substantial amounts of analysis of experiments during the present invention is realized
In the case of boring the contact cone angle in the middle part of section 102 and expansion cone between conical section 202, in patching tube expansion process, the first circle
Bore the contact in the middle part of section 102 and expansion cone between conical section 202 and be applied between the driving pressure of expansion cone bottom
Change, by test of many times and data analysis, inventor is had found under different contact cone angles, in the first conical section 102 and expansion cone
Contact between portion's conical section 202 and be applied to expansion cone bottom driving pressure it is as shown in the table：
Table one：Expand influence of the cone angle to driving pressure and the bulbs of pressure
| Expansion cone angle/° | Driving pressure/MPa | The bulbs of pressure/MPa |
| 2 | 43.19 | 493.62 |
| 4 | 40.68 | 498.54 |
| 6 | 38.35 | 512.30 |
| 8 | 36.75 | 575.16 |
| 10 | 35.06 | 574.24 |
| 12 | 34.86 | 663.51 |
| 14 | 34.12 | 730.62 |
| 16 | 33.79 | 812.39 |
| 18 | 33.15 | 835.41 |
| 20 | 32.63 | 864.05 |
| 40 | 30.42 | 873.65 |
| 60 | 31.83 | 890.32 |
The relation between contact cone angle and contact and driving pressure shown in data and Fig. 4 shown in reference table one is bent
Line inventor has found that, when contact cone angle is from when increasing to 20 ° for 2 °, the driving pressure for being applied to expansion cone bottom subtracts from 43.19MPa
Small to arrive 32.63MPa, the contact between expansion cone and patching tube increases to 864.05MPa from 493.62MPa, i.e. contact cone
When angle increases, driving pressure is gradually reduced and the bulbs of pressure gradually increase, and maximum swelling pressure can reach 864.05MPa, institute
With while driving pressure is reduced, it is contemplated that the contact between patching tube and expansion cone, namely be also contemplated that and mend
The bulbs of pressure between patch pipe and sleeve pipe.
By above-mentioned analysis, inventor, when it is 10 ° to contact cone angle, applies during the embodiment of the present invention is realized
The bulbs of pressure between driving pressure and patching tube and sleeve pipe in expansion cone are attained by the optimum combination point of expansion requirements,
Therefore, the embodiment of the present invention is preferable, and the contact cone angle in the middle part of the first conical section 102 and expansion cone between conical section 202 is
10°。
With reference to shown in figure 1, Fig. 2 and Fig. 3, the big end external diameter of conical section 202 and the first conical section 101 is big in the middle part of expansion cone
Hold the size of internal diameter identical, it is ensured that expansion cone is during bottom-up motion inside patching tube, expansion cone and subsidy
Contact area between pipe is sufficiently large.
With reference to shown in figure 1, Fig. 2 and Fig. 3, the length of conical section 202 is more than the length of the first conical section 102 in the middle part of expansion cone
Degree.
With reference to shown in figure 3, the connecting portion in the middle part of expansion cone bottom cylindrical section 201 and expansion cone between conical section 202 is circle
Arc connects, and the connecting portion of the bottom surface of expansion cone bottom cylindrical section 201 and side is fillet, it is ensured that expansion cone is in patching tube
During internal bottom-up motion, the reliable contacts between expansion cone and patching tube.
The embodiment of the present invention provides a kind of casing damaged well light-wall pipe patch device, including patching tube, lower end are arranged on patching tube
Internal expansion cone, the upper sealing ring of outer wall upper end for being arranged on patching tube and the lower sealing for the outer wall lower end for being arranged on patching tube
Ring, wherein, patching tube includes the first cylindrical section, the first conical section, the second cylindrical section and the bottom for being arranged on the first cylindrical section bottom
Plate, expansion cone include expansion cone bottom cylindrical section, expansion cone middle part conical section and expansion cone top cylindrical section, expansion cone middle part circle
Bore section to cooperate with the first conical section, by the centrally disposed through hole of swollen cone into the inner chamber between expansion cone and patching tube
High voltage power liquid is injected, under the driving of difference force, expansion cone is moved from the lower to upper part of patching tube, and expansion cone is in patching tube
During internal motion so that patching tube constantly expands, until patching tube fits with sleeve pipe, and patching tube is in expansion cone
Deformation under effect is permanent deformation, in the presence of upper sealing ring and lower sealing ring, is realized between patching tube and sleeve pipe
Sealing, realize that the light-wall pipe of casing damaged well strengthens the repairing with leak, casing damaged well reparation is ensured using upper sealing ring and lower sealing ring
Sealing effectiveness afterwards, reduce the rehabilitation cost of casing damaged well and repair difficulty, extremely significantly reduce drilling cost.
Obviously, those skilled in the art can carry out various changes and modification without departing from this hair to the embodiment of the present invention
The spirit and scope of bright embodiment.So, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to comprising including these changes and modification.
Claims (10)
- A kind of 1. casing damaged well light-wall pipe patch device, it is characterised in that the casing damaged well light-wall pipe patch device include patching tube, Lower end be arranged on expansion cone inside the patching tube, be arranged on the patching tube outer wall upper end upper sealing ring and be arranged on The lower sealing ring of the outer wall lower end of the patching tube, wherein, the patching tube includes the first cylindrical section, big end and the described first circle The first conical section that shell of column is connected, the second cylindrical section being connected with the small end of first conical section and it is arranged on described The bottom plate of one cylindrical section bottom, the expansion cone include expansion cone bottom cylindrical section, expansion cone middle part conical section and the expansion vertex of a cone Portion's cylindrical section, expansion cone bottom cylindrical section are connected with the big end of conical section in the middle part of the expansion cone, the expansion vertex of a cone Portion's cylindrical section is connected with the small end of conical section in the middle part of the expansion cone；The expansion cone is provided centrally with through hole, described logical Hole connects the inner chamber of the patching tube.
- 2. casing damaged well light-wall pipe patch device according to claim 1, it is characterised in that first conical section and described The taper of conical section is identical in the middle part of expansion cone.
- 3. casing damaged well light-wall pipe patch device according to claim 2, it is characterised in that first conical section and described Contact cone angle in the middle part of expansion cone between conical section is 10 °.
- 4. casing damaged well light-wall pipe patch device according to claim 3, it is characterised in that conical section in the middle part of the expansion cone Big end external diameter it is identical with the size of the big end internal diameter of first conical section.
- 5. the casing damaged well light-wall pipe patch device according to any one of Claims 1 to 4, it is characterised in that the upper sealing The material of ring is vulcanization rubber, and the material of the lower sealing ring is vulcanization rubber.
- 6. the casing damaged well light-wall pipe patch device according to any one of Claims 1 to 4, it is characterised in that the patching tube External diameter be less than sleeve pipe internal diameter and the patching tube external diameter be more than described sleeve pipe internal diameter 3/4.
- 7. the casing damaged well light-wall pipe patch device according to any one of Claims 1 to 4, it is characterised in that the expansion cone The length of middle part conical section is more than the length of first conical section.
- 8. the casing damaged well light-wall pipe patch device according to any one of Claims 1 to 4, it is characterised in that the patching tube Thickness be 5mm~8mm.
- 9. the casing damaged well light-wall pipe patch device according to any one of Claims 1 to 4, it is characterised in that the expansion cone Connecting portion in the middle part of bottom cylindrical section and the expansion cone between conical section is circular sliding slopes.
- 10. the casing damaged well light-wall pipe patch device according to any one of Claims 1 to 4, it is characterised in that the expansion cone The bottom surface of bottom cylindrical section and the connecting portion of side are fillet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710772415.4A CN107503701A (en) | 2017-08-31 | 2017-08-31 | A kind of casing damaged well light-wall pipe patch device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710772415.4A CN107503701A (en) | 2017-08-31 | 2017-08-31 | A kind of casing damaged well light-wall pipe patch device |
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| Publication Number | Publication Date |
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| CN107503701A true CN107503701A (en) | 2017-12-22 |
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|---|---|---|---|
| CN201710772415.4A Pending CN107503701A (en) | 2017-08-31 | 2017-08-31 | A kind of casing damaged well light-wall pipe patch device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109630052A (en) * | 2018-12-18 | 2019-04-16 | 中国石油大学(华东) | Hydraulic control pressuring expansion pipe automatic expanding device |
| CN110578488A (en) * | 2019-10-21 | 2019-12-17 | 潍坊市宇宏石油机械有限公司 | Casing damage well repairing tool and repairing 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203362089U (en) * | 2013-06-08 | 2013-12-25 | 华鼎鸿基石油工程技术(北京)有限公司 | Secondary expansion patching device passing patching tube |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109630052A (en) * | 2018-12-18 | 2019-04-16 | 中国石油大学(华东) | Hydraulic control pressuring expansion pipe automatic expanding device |
| CN110578488A (en) * | 2019-10-21 | 2019-12-17 | 潍坊市宇宏石油机械有限公司 | Casing damage well repairing tool and repairing 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 |
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Application publication date: 20171222 |