CN208073390U - casing damage well expansion pipe reinforcing mechanism - Google Patents
casing damage well expansion pipe reinforcing mechanism Download PDFInfo
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- CN208073390U CN208073390U CN201820337964.9U CN201820337964U CN208073390U CN 208073390 U CN208073390 U CN 208073390U CN 201820337964 U CN201820337964 U CN 201820337964U CN 208073390 U CN208073390 U CN 208073390U
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- Prior art keywords
- expansion tube
- wall
- expansion
- strengthening mechanism
- seal assembly
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- 230000007246 mechanism Effects 0.000 title claims abstract description 23
- 230000003014 reinforcing effect Effects 0.000 title description 2
- 238000007789 sealing Methods 0.000 claims abstract description 41
- 238000005728 strengthening Methods 0.000 claims abstract description 22
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 6
- 239000010935 stainless steel Substances 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 238000005987 sulfurization reaction Methods 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 4
- 125000006850 spacer group Chemical group 0.000 claims description 4
- 229920001774 Perfluoroether Polymers 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 2
- UJMWVICAENGCRF-UHFFFAOYSA-N oxygen difluoride Chemical compound FOF UJMWVICAENGCRF-UHFFFAOYSA-N 0.000 claims 2
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007423 decrease Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 5
- 229920006169 Perfluoroelastomer Polymers 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
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Abstract
The utility model provides a cover decreases well expansion pipe strengthening mechanism, include: a casing having a section to be repaired; the expansion pipe is arranged in the sleeve and is made of 3Cr13 stainless steel material, a first sealing component and a second sealing component are respectively arranged on the outer walls of the expansion pipe close to the upper end and the lower end, a section to be repaired is positioned between the first sealing component and the second sealing component, and the first sealing component and the second sealing component are hung on the inner wall of the sleeve in a setting mode after the expansion pipe is expanded; the connecting rod is arranged in the expansion pipe and provided with a fluid channel, the connecting rod is connected with the oil pipe, the fluid channel is communicated with an internal flow channel of the oil pipe, and the lower end of the connecting rod is connected with an expansion cone which props against the inner wall of the expansion pipe; the bottom blind plug is connected to the lower end of the expansion pipe, and a launching chamber is defined between the bottom blind plug and the expansion cone. The utility model discloses casing damage well expansion pipe strengthening mechanism has high temperature resistant and corrosion resisting property better.
Description
Technical field
The utility model is related to casing damaged well recovery technique field more particularly to a kind of casing damaged well expansion tube strengthening mechanisms.
Background technology
The description of this part is only provided discloses relevant background information with the utility model, without constituting the prior art.
Expandable casing patching is after carrying out shaping or milling processing to casing damaged well section, with oil pipe by expansion tube pipe down toward needing to mend
Patch repairs section, is suppressed into oil pipe with high-pressure pump on ground.After expansion tube transmitting cavity pressure reaches certain numerical value, expansion cone pushes away
Dynamic oil pipe uplink, makes expansion tube that the plastic deformation more than elastic limit occur.When expansion cone goes upward to the upper end beyond expansion tube
When, oil pipe is connected to casing, and pump pressure declines, and expansion tube completes expansion, and is tightly attached to basic internal surface of sleeve pipe, reaches anchoring, sealing
With the requirement of reparation.Then flowline is played, the silk plug being connected under expansion tube is drilled through, completes casing repairing.
However, the expansion tube used in existing expandable casing patching technology is difficult to meet high temperature resistant, corrosion resistant demand.Especially
It is developed in the constructions such as viscous crude in fireflood, often occur the expansion tube after subsidy due to high temperature resistant, resistance to corrosion of bowing can be poor and make
There is the case where secondary damage in casing and expansion tube.
It should be noted that being intended merely to above to the introduction of technical background convenient clear to the technical solution of the utility model progress
Chu, complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes in this practicality
Novel background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Utility model content
Based on prior art defect above-mentioned, the utility model embodiment provides a kind of casing damaged well expansion tube reinforcing machine
Structure has preferably high temperature resistant and corrosion resistance.
To achieve the goals above, the utility model provides the following technical solution.
A kind of casing damaged well expansion tube strengthening mechanism, including：
Casing, described sleeve pipe have section to be subsidized；
The expansion tube being lowered into described sleeve pipe, the expansion tube are made of 3Cr13 stainless steel materials, and the expansion tube leans on
The outer wall of nearly upper end and lower end is respectively arranged with the first seal assembly and the second seal assembly, and the section to be subsidized is located at described
Between first seal assembly and the second seal assembly, first seal assembly and the second seal assembly are in the expansion tube swelling
It sets afterwards on the inner wall for being suspended on described sleeve pipe；
It is lowered into the expansion tube and the connecting rod with fluid channel, the connecting rod is connected and described with oil pipe
Fluid channel is connected with the inner flow passage of the oil pipe, and the lower end of the connecting rod is connected with expansion cone, the expansion vertex of a cone
Touch the inner wall of the expansion tube；
It is connected to the bottom blind plugging of the expansion tube lower end, transmitting is limited between the bottom blind plugging and the expansion cone
Room.
Preferably, first seal assembly includes multiple first sealing rings and multiple first beckets, and multiple described
One sealing ring and multiple first metal central spacer settings.
Preferably, first sealing ring is made of perfluoroelastomers material, and first sealing ring passes through sulfuration process
It is arranged in an interference fit on the outer wall of the expansion tube.
Preferably, the outer wall outwardly convex of the expansion tube is to form first becket, to first metal
Ring is structure as a whole with the expansion tube.
Preferably, second seal assembly includes multiple second sealing rings and multiple second beckets, and multiple described
Two sealing rings and multiple second metal central spacer settings.
Preferably, second sealing ring is made of perfluoroelastomers material, and second sealing ring passes through sulfuration process
It is arranged in an interference fit on the outer wall of the expansion tube.
Preferably, the outer wall outwardly convex of the expansion tube is to form second becket, to second metal
Ring is structure as a whole with the expansion tube.
Preferably, the upper end of the bottom blind plugging is provided with blind hole, and the inner wall of the blind hole is provided with internal thread, to institute
Stating bottom blind plugging can be connected by the way that the female blind hole is arranged with fishing lance.
Preferably, the upper end of the bottom blind plugging is provided with multiple grooves.
Preferably, inner wall of the expansion tube close to lower end tilts down to form guiding incline, is arranged outside the bottom blind plugging
There are pressure cap, the pressure cap to contact on the guiding incline.
The casing damaged well expansion tube strengthening mechanism of the utility model embodiment, by preferable by high temperature resistant and corrosion resistance
Expansion tube is made to substitute current material in 3Cr13 stainless steels, so that the casing damaged well expansion tube of the utility model embodiment
The high temperature resistant and corrosion resistance of strengthening mechanism are improved.
With reference to following description and accompanying drawings, the specific embodiment of the utility model is disclosed in detail, it is new to specify this practicality
The principle of type can be in a manner of adopted.It should be understood that the embodiments of the present invention are not so limited in range.
In the range of the spirit and terms of appended claims, the embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It is used in other embodiments, it is combined with the feature in other embodiments, or substitute the feature in other embodiments.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when being used herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Description of the drawings
Attached drawing described here is only used for task of explanation, and is not intended to limit in any way disclosed by the utility model
Range.In addition, the shape and proportional sizes etc. of each component in figure are only schematical, it is used to help the reason to the utility model
Solution is not the specific shape and proportional sizes for limiting each component of the utility model.Those skilled in the art is new in this practicality
Under the introduction of type, various possible shapes and proportional sizes can be selected to implement the utility model as the case may be.Attached
In figure：
Fig. 1 is the structural schematic diagram of the casing damaged well expansion tube strengthening mechanism of the utility model embodiment.
Specific implementation mode
In order to make those skilled in the art more fully understand the technical solution in the utility model, below in conjunction with this reality
With the attached drawing in new embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that
The described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.Based on the utility model
In embodiment, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example should all belong to the range of the utility model protection.
It should be noted that when element is referred to as " being set to " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not offered as being unique embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with the technology for belonging to the utility model
The normally understood meaning of technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein "and/or" includes
Any and all combinations of one or more relevant Listed Items.
As shown in Figure 1, the utility model embodiment provides a kind of 2 strengthening mechanism of casing damaged well expansion tube, may include：
Casing 1, described sleeve pipe 1 have section 101 to be subsidized；The expansion tube 2 being lowered into described sleeve pipe 1, the expansion tube 2 is by 3Cr13
Stainless steel material is made, and outer wall of the expansion tube 2 close to upper end and lower end is respectively arranged with the first seal assembly 3 and second
Seal assembly 4, for the section 101 to be subsidized between first seal assembly, 3 and second seal assembly 4, described first is close
Sealing assembly 3 and the second seal assembly 4 are set after the expansion of the expansion tube 2 to be suspended on the inner wall of described sleeve pipe 1；It is lowered into institute
The connecting rod 5 of fluid channel 501 is stated in expansion tube 2 and has, the connecting rod 5 is connected with oil pipe 6 and the fluid channel
501 are connected with the inner flow passage of the oil pipe 6, and the lower end of the connecting rod 5 is connected with expansion cone 7, and the expansion cone 7 contacts
The inner wall of the expansion tube 2；It is connected to the bottom blind plugging 8 of 2 lower end of the expansion tube, the bottom blind plugging 8 and the expansion cone 7
Between limit launch room 9.
2 strengthening mechanism of casing damaged well expansion tube of the utility model embodiment, by preferable by high temperature resistant and corrosion resistance
3Cr13 stainless steels be made expansion tube 2 to substitute current material so that the casing damaged well expansion of the utility model embodiment
The high temperature resistant and corrosion resistance of 2 strengthening mechanism of pipe are improved.
In the present embodiment, inner wall of the expansion tube 2 close to lower end can be provided with annular groove, which corresponds to bottom blind plugging
8, it can be filled with sealant in annular groove, with the seam between sealing expansion tube 2 and bottom blind plugging 8, improve the sealing of expansion tube 2
Ability.In addition, expansion tube 2 passes through special heat treatment process, softens the heat affected area of 2 outer layer machining area of expansion tube, make it
Hardness and yield strength are reduced, plasticity is enhanced.
In the present embodiment, the first seal assembly 3 and the second seal assembly 4 can be set after the expansion of expansion tube 2 is covering
On the inner wall of pipe 1, it is sealed so as to the section to be subsidized 101 to casing 1.Meanwhile first seal assembly 3 and second seal
Component 4 is set in 1 inner wall of casing, can rely on contact friction force that expansion tube 2 is made to be suspended in casing 1.
In one embodiment, the first seal assembly 3 may include multiple first sealing rings 301 and multiple first beckets
302, multiple first sealing rings 301 and multiple first beckets 302 are preferably arranged in a manner of interval.
Wherein, the first sealing ring 301 is preferably made of the preferable perfluoroelastomers material of high temperature resistance, the first sealing ring
301 can be in an interference fit arranged by sulfuration process on the outer wall of expansion tube 2, so as to improve the first sealing
Bond strength between 2 outer wall of ring 301 and expansion tube.
Since the first sealing ring 301 is made of rubber material, sealing life will gradually weak base under high temperature environment.Such as
This can play the sealing of the first sealing ring 301 by the first becket 302 being arranged at intervals between the first sealing ring 301
To the effect of auxiliary and support, sealing function of the expansion tube 2 to casing 1 is improved to greatest extent.
First becket 302 is preferably an integral structure with expansion tube 2, to improve bond strength between the two.One
In a embodiment, the generation type of the first becket 302 can be the outer wall outwardly convex formation of expansion tube 2.
Likewise, the second seal assembly 4 can also include multiple second sealing rings 401 and multiple second beckets 402, it is more
A second sealing ring 401 and multiple second beckets 402 are preferably arranged in a manner of interval.Second sealing ring 401 is preferably by complete
Fluoroether rubber material is made, and the second sealing ring 401 can be in an interference fit arranged by sulfuration process in expansion tube 2
On outer wall.And the outer wall outwardly convex of expansion tube 2 to be to form the second becket 402, to the second becket 402 and expansion tube 2
It is structure as a whole.
In the present embodiment, the fluid channel 501 in connecting rod 5 is connected with the inner flow passage 601 of oil pipe 6, and oil pipe 6 is again
Be connected with rotary hose 11 by well head tap 10, to high pressure pump truck 12 can pass sequentially through rotary hose 11, well head tap 10,
Oil pipe 6 and connecting rod 5 inject high-pressure fluid into launch room 9, to which high-pressure fluid can act in expansion cone 7, push swollen
7 uplinks of swollen cone so realize the expansion of expansion tube 2, and then realize the subsidy and reparation of casing damaged well.
In the present embodiment, bottom blind plugging 8 is salvagable.Specifically, the upper end of bottom blind plugging 8 can be provided with it is blind
The inner wall in hole, blind hole is provided with internal thread, to which bottom blind plugging 8 can be connected by the way that female blind hole is arranged with fishing lance.
In this way, after the subsidy and repair of completion casing damaged well, fishing lance can be entered in the blind hole with grafting, realize fishing lance and bottom blind plugging 8
Connection, so as to by bottom blind plugging 8 salvage come.
Further, the upper end of bottom blind plugging 8 can be provided with multiple grooves, be to the bottom blind plugging 8 of the present embodiment
Split-type bottom is stifled, and radial contraction so, which occurs, for bottom blind plugging 8 provides deformation space, to reduce the salvaging resistance of bottom blind plugging 8
Power.
In addition, bottom blind plugging 8 should be kept fixed when bearing the downward pressure of high-pressure fluid with expansion tube 2, to prevent bottom
Portion's blind plugging 8 slips under the action of downward power from expansion tube 2.For this purpose, in one embodiment, expansion tube 2 is close to lower end
Inner wall tilt down to form guiding incline, be provided with pressure cap outside bottom blind plugging 8, pressure cap contacts on guiding incline.
Pressure cap is annular in shape, and outer wall is obliquely installed, to be adapted with guiding incline.In this way, when high pressure is being born in bottom blind plugging 8
It when the downward pressure of fluid, is contacted with the adaptation of guiding incline by pressure cap, can make bottom blind plugging 8 in expansion tube 2 downwards
Mobile to be suppressed from spending, i.e., bottom blind plugging 8 is by lower limit.And the downward pressure that high-pressure fluid applies bottom blind plugging 8
Bigger, the combination fixed function power of bottom blind plugging 8 and expansion tube 2 is stronger, to avoid bottom blind plugging 8 from connecting with expansion tube 2
It connects disconnected de-.
In addition, by said structure design, the degree of freedom that bottom blind plugging 8 moves up is not suppressed, so that bottom
Blind plugging 8 is salvaged to be achieved by fishing lance.
The operation principle of 2 strengthening mechanism of casing damaged well expansion tube of not the utility model embodiment is described below.
After carrying out shaping or milling processing to casing damaged well section, expansion tube 2 is needed to subsidize down toward casing 1 with oil pipe 6 and is repaired
Section is suppressed with high pressure pump truck 12 into oil pipe 6 on ground.It is swollen after the pressure in 2 launch room 9 of expansion tube reaches certain numerical value
Swollen cone 7 pushes the uplink together of oil pipe 6.When 7 Top Runby of expansion cone is more than the total length of expansion, i.e. expansion cone 7 exceeds expansion tube 2
Upper end when, oil jacket connection, pump pressure declines, and expansion tube 2 completes expansion, and is tightly attached to 1 inner wall of basic casing, reaches anchoring, close
Envelope and the requirement repaired.Then flowline 6 is played, tripping in fishing lance pulls bottom blind plugging 8 out, completes repairing construction work.
It should be noted that in the description of the present invention, term " first ", " second " etc. be used for description purposes only and
Similar object is distinguished, between the two and sequencing is not present, can not be interpreted as indicating or implying relative importance.This
Outside, in the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.
It should be understood that above description is to illustrate rather than to be limited.By reading above-mentioned retouch
It states, many embodiments and many applications except the example provided all will be apparent for a person skilled in the art
's.Therefore, the range of this introduction should not be determined with reference to foregoing description, but should with reference to preceding claims and these
The full scope of the equivalent that claim is possessed determines.For comprehensive purpose, all articles and reference include patent
The disclosure of application and bulletin is all by reference to being incorporated herein.Appointing for theme disclosed herein is omitted in preceding claims
Where face is not intended to abandon the body matter, also should not be considered as applicant and the theme is not thought of as to disclosed reality
With a part for novel theme.
Claims (10)
1. a kind of casing damaged well expansion tube strengthening mechanism, which is characterized in that including：
Casing, described sleeve pipe have section to be subsidized；
The expansion tube being lowered into described sleeve pipe, the expansion tube are made of 3Cr13 stainless steel materials, and the expansion tube is close to upper
The outer wall of end and lower end is respectively arranged with the first seal assembly and the second seal assembly, and the section to be subsidized is located at described first
Between seal assembly and the second seal assembly, first seal assembly and the second seal assembly are in the expansion tube swelling recoil
Envelope is suspended on the inner wall of described sleeve pipe；
It is lowered into the expansion tube and has the connecting rod of fluid channel, the connecting rod is connected with oil pipe and the fluid
Channel is connected with the inner flow passage of the oil pipe, and the lower end of the connecting rod is connected with expansion cone, and the expansion cone contacts institute
State the inner wall of expansion tube；
It is connected to the bottom blind plugging of the expansion tube lower end, launch room is limited between the bottom blind plugging and the expansion cone.
2. casing damaged well expansion tube strengthening mechanism as described in claim 1, which is characterized in that first seal assembly includes more
A first sealing ring and multiple first beckets, multiple first sealing rings and multiple first metal central spacer settings.
3. casing damaged well expansion tube strengthening mechanism as claimed in claim 2, which is characterized in that first sealing ring is by perfluoroether
Rubber material is made, and the outer wall in the expansion tube is arranged by sulfuration process in an interference fit for first sealing ring
On.
4. casing damaged well expansion tube strengthening mechanism as claimed in claim 2, which is characterized in that the outer wall convex of the expansion tube
It rises to form first becket, to which first becket is structure as a whole with the expansion tube.
5. casing damaged well expansion tube strengthening mechanism as described in claim 1, which is characterized in that second seal assembly includes more
A second sealing ring and multiple second beckets, multiple second sealing rings and multiple second metal central spacer settings.
6. casing damaged well expansion tube strengthening mechanism as claimed in claim 5, which is characterized in that second sealing ring is by perfluoroether
Rubber material is made, and the outer wall in the expansion tube is arranged by sulfuration process in an interference fit for second sealing ring
On.
7. casing damaged well expansion tube strengthening mechanism as claimed in claim 5, which is characterized in that the outer wall convex of the expansion tube
It rises to form second becket, to which second becket is structure as a whole with the expansion tube.
8. casing damaged well expansion tube strengthening mechanism as described in claim 1, which is characterized in that the upper end of the bottom blind plugging is arranged
There are blind hole, the inner wall of the blind hole to be provided with internal thread, to which the bottom blind plugging can be female described blind by being arranged
Hole is connected with fishing lance.
9. casing damaged well expansion tube strengthening mechanism as claimed in claim 8, which is characterized in that the upper end of the bottom blind plugging is arranged
There are multiple grooves.
10. casing damaged well expansion tube strengthening mechanism as claimed in claim 8, which is characterized in that the expansion tube is close to lower end
Inner wall tilts down to form guiding incline, is provided with pressure cap outside the bottom blind plugging, the pressure cap contacts on the guiding incline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820337964.9U CN208073390U (en) | 2018-03-13 | 2018-03-13 | casing damage well expansion pipe reinforcing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820337964.9U CN208073390U (en) | 2018-03-13 | 2018-03-13 | casing damage well expansion pipe reinforcing mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208073390U true CN208073390U (en) | 2018-11-09 |
Family
ID=64039062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820337964.9U Active CN208073390U (en) | 2018-03-13 | 2018-03-13 | casing damage well expansion pipe reinforcing mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN208073390U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112431991A (en) * | 2020-11-04 | 2021-03-02 | 中国石油天然气股份有限公司 | Reinforcing, sealing and repairing method for large-section casing damage well |
-
2018
- 2018-03-13 CN CN201820337964.9U patent/CN208073390U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112431991A (en) * | 2020-11-04 | 2021-03-02 | 中国石油天然气股份有限公司 | Reinforcing, sealing and repairing method for large-section casing damage well |
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