CN202152654U - Automatic pressure-balancing expansion-fishing integrated expansion pipe tool - Google Patents
Automatic pressure-balancing expansion-fishing integrated expansion pipe tool Download PDFInfo
- Publication number
- CN202152654U CN202152654U CN2011202661227U CN201120266122U CN202152654U CN 202152654 U CN202152654 U CN 202152654U CN 2011202661227 U CN2011202661227 U CN 2011202661227U CN 201120266122 U CN201120266122 U CN 201120266122U CN 202152654 U CN202152654 U CN 202152654U
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- Prior art keywords
- oil
- sliding sleeve
- expansion
- expansion pipe
- pull rod
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- Expired - Lifetime
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- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 230000010354 integration Effects 0.000 abstract description 5
- 239000003921 oil Substances 0.000 description 75
- 238000007789 sealing Methods 0.000 description 12
- 238000010008 shearing Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008719 thickening Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Abstract
The utility model discloses an automatic balanced pressure expands drags for integration expansion pipe instrument, including the expansion pipe with establish the end stifled in the expansion pipe bottom, be equipped with in the expansion pipe and run through in the expansion pipe and the stifled pull rod that can slide at the end, lower extreme stifled at the end is connected with the bleeder, the bleeder includes that the cover locates the bleeder casing in the pull rod outside, clearance between bleeder casing and the pull rod forms an annular space, be equipped with in the annular space and can be at gliding sliding sleeve of annular space, set firmly the back of the body mother along radial outward bulge in the bottom of pull rod, radially seted up the draining mouth on the bleeder casing, radially seted up the counterpoint slotted hole on the sliding sleeve, the back of the body mother can with the sliding sleeve supports mutually and drives the sliding sleeve is in the annular space, the counterpoint slotted hole can with the draining mouth counterpoints the intercommunication. The utility model has the advantages of avoid the suction phenomenon that appears at the salvage in-process, reduce and salvage the stifled degree of difficulty at the end, improve oil field site operation fail safe nature.
Description
Technical Field
The utility model relates to an oil development field especially relates to an automatic balanced pressure expands drags for integration expansion pipe instrument.
Background
At present, in the long-term oil extraction process of an oil well in an oil field, an underground oil pipe is damaged and needs to be maintained. The underground casing repairing method is one of the common well repairing modes, and is characterized in that an expansion pipe is adopted for casing repairing and reinforcing in construction, a bottom plug is used for sealing the bottom of the expansion pipe, the bottom plug is in threaded connection with the expansion pipe, and the underground casing repairing method can be applied to the operation processes of well drilling, well completion, oil extraction, well repairing and the like.
Although the existing expansion and fishing integrated expansion pipe patching tool can realize one-time completion of fishing of the expansion pipe and the bottom plug, the suction piston structure is formed because the bottom plug and the expansion pipe have good sealing performance after long-section casing pipe patching, and thus, when the bottom plug is fished, a suction phenomenon can be formed. The instant pumping action of the well section below the bottom plug not only increases the difficulty of salvaging the bottom plug, but also threatens the safety of the well body structure of the oil well; meanwhile, the huge downward pressure generated by the dead weight of a large amount of liquid in the well section above the bottom plug on the bottom plug needs to be overcome during fishing, so that the fishing difficulty is greatly increased.
In conclusion, the existing expansion and fishing integrated expansion pipe patching tool has the defects that the bottom plug is difficult to salvage, and the operation of production, maintenance, environmental protection and the like of a wellhead is inconvenient by upward returning liquid.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an automatic balanced pressure expands drags for integration expansion pipe instrument, this expansion pipe instrument can avoid salvaging the expansion pipe and the suction phenomenon that stifled in-process appears at the end, reduces and salvages the end stifled degree of difficulty, improves oil field site operation fail safe nature.
In order to achieve the above object, the utility model provides an automatic pressure-balancing expansion-fishing integrated expansion pipe tool, which comprises an expansion pipe and a bottom plug arranged at the bottom of the expansion pipe, a sliding pull rod penetrating through the expansion pipe and the bottom plug is arranged in the expansion pipe, the lower end of the bottom plug is connected with an oil drain device, the oil drain device comprises an oil drain device shell sleeved outside the pull rod, an annular space is formed by a gap between the oil drain device shell and the pull rod, a sliding sleeve capable of sliding in the annular space is arranged in the annular space, a back nut protruding outwards along the radial direction is fixedly arranged at the bottom of the pull rod, an oil drain opening is arranged on the oil drain device shell along the radial direction, an alignment groove hole is arranged on the sliding sleeve along the radial direction, the back nut can be abutted against the sliding sleeve and drives the sliding sleeve to slide in the annular space, the alignment slotted hole can be communicated with the oil drainage port in an alignment mode.
The automatic pressure balancing expansion and fishing integrated expansion pipe tool comprises a sliding sleeve, wherein the sliding sleeve is connected with the oil drain device shell in a clamping mode through a shearing pin which can be cut off by external force, and the outer diameter of a back nut is larger than the inner diameter of the sliding sleeve and smaller than the inner diameter of the oil drain device shell.
As above the integrated inflation pipe instrument is dragged for to automatic balance pressure inflation, wherein, bleeder lower clutch and outer thickening oil pipe are connected gradually to bleeder casing lower extreme, the bleeder casing the bleeder lower clutch with outer thickening oil pipe's inner chamber is linked together and is formed the passageway, the pull rod extends to in the passageway and can slide in the passageway outer thickening oil pipe's lower extreme is connected with the blind stifled of oil pipe.
The automatic pressure balancing and expanding and fishing integrated expansion pipe tool comprises an oil drainer shell, an oil drainer lower joint, an outer thickened oil pipe and an oil drainer lower joint, wherein the oil drainer shell is connected with the oil drainer lower joint through threads, and the outer thickened oil pipe is connected with the oil drainer lower joint through threads.
The automatic pressure balancing and expanding-fishing integrated expansion pipe tool comprises a bottom plug, a bottom plug and an oil drainer shell, wherein the bottom plug is in threaded connection with the oil drainer shell.
The automatic pressure balancing expansion and fishing integrated expansion pipe tool comprises a sliding sleeve, a pressure release device shell and a sealing ring, wherein the sliding sleeve is arranged on the sliding sleeve, and the pressure release device shell is arranged on the sliding sleeve.
The automatic pressure balancing expansion and fishing integrated expansion pipe tool comprises a bottom plug, wherein an expansion cone and an expansion cone seat are arranged at the upper end of the bottom plug.
The automatic pressure balancing expansion and fishing integrated expansion pipe tool is characterized in that a groove is formed in the outer wall of the pull rod, and a pull rod coupling is mounted in the groove.
Compared with the prior art, the utility model has the following characteristics and advantages:
1. the utility model discloses set up the bleeder at end stifled lower part, through opening or closing of bleeder, realize end stifled inside high-pressure liquid discharge, reach the efficiency of pressure release for end stifled upper and lower both ends form the poor route of non-pressure, have avoided the production of suction phenomenon, so that with all suppress the tubular column and end stifled whole giving up out of the well, and then improved the fail safe nature of operation, reduced the construction risk.
2. The utility model discloses at the bleeder casing with be equipped with the sealing washer between the sliding sleeve to ensure the leakproofness between bleeder casing and the sliding sleeve.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,
FIG. 1 is a schematic structural view of the automatic pressure-balancing expansion-fishing integrated expansion pipe tool of the present invention;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is an enlarged schematic view of portion B of FIG. 1;
fig. 4 is an enlarged schematic structural view of a portion C of fig. 1.
Description of reference numerals:
1-an expansion cone; 2-expansion pipe; 3-expansion cone base; 4-bottom blocking; 5-elastic claws; 6-a pull rod; 7-the bleeder housing; 8-sealing ring; 9-oil drainage port; 10-a sliding sleeve; 11-shear pins; 12-alignment slot holes; 13-a lower joint of the oil drainer; 14-external heavy oil pipe; 15-a draw-bar coupling; 16-dorsal mother; and 17-blind plugging of the oil pipe.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings.
Please refer to fig. 1 to 4, which are schematic structural views of the automatic pressure-balancing expansion-fishing integrated expansion pipe tool of the present invention; an enlarged structure of part a of fig. 1; an enlarged structure of part B of FIG. 1; fig. 1 is an enlarged schematic view of part C.
As shown in the drawing, the utility model provides an automatic balanced pressure expands drags for integration expansion vessel instrument, include expansion vessel 2 and establish the end of expansion vessel 2 bottom is stifled 4 be equipped with in the expansion vessel 2 run through in the expansion vessel 2 with the pull rod 6 of end stifled 4, the inner chamber that expansion vessel 2 and end stifled 4 can be followed to pull rod 6 slides from top to bottom. The lower end of the bottom plug 4 is connected with an oil drain device, the oil drain device comprises an oil drain device shell 7 sleeved outside the pull rod 6, please refer to fig. 3, a certain gap is formed between the oil drain device shell 7 and the pull rod 6 to form an annular space, and the annular space is internally provided with the sliding sleeve 10 capable of sliding up and down in the annular space. The bottom of the pull rod 6 is fixedly provided with a back nut 16 which is outwards protruded along the radial direction, the oil drain casing 7 is radially provided with an oil drain opening 9, the sliding sleeve 10 is radially provided with an alignment slotted hole 12, the back nut 16 can be abutted against the sliding sleeve 10 and drives the sliding sleeve 10 to slide upwards in the annular space, so that the alignment slotted hole 12 is communicated with the oil drain opening 9 in an alignment way. Therefore, high-pressure liquid in the bottom plug 4 is discharged through the oil drainage port 9, the pressure relief effect is achieved, no-pressure-difference passages are formed at the upper end and the lower end of the bottom plug 4, the suction phenomenon is avoided, all the pressing pipe columns and the bottom plug are conveniently released to go out of a well, and the safety and reliability of operation are improved.
The utility model discloses in, sliding sleeve 10 is through the shear pin 11 and the 7 joint location of bleeder casing along radial setting, and shear pin 11 can be cut off under the effect of shear force to release sliding sleeve 10 makes it can be at annular space's along axial displacement. Referring to fig. 4, a back nut 16 protruding outward in the radial direction is fixedly arranged at the bottom of the pull rod 6, the outer diameter of the back nut 16 is larger than the inner diameter of the sliding sleeve 10 and smaller than the inner diameter of the oil drain device shell 7, an oil drain opening 9 is radially arranged on the oil drain device shell 7, and an alignment slot 12 is radially arranged on the sliding sleeve 10. In the oil pipe operation process, the sliding sleeve 10 and the oil drain device shell 7 are positioned through the shearing pins 11, the axial and radial relative positions of the sliding sleeve 10 and the oil drain device shell 7 are kept unchanged under the fixation of the shearing pins 11, and good sealing is guaranteed. The positions of the oil drainage port 9 and the alignment slotted hole 12 are staggered, so that the sealing between the expansion pipe and the bottom plug is ensured; in the salvaging process, under the action of the lifting force, the back nut 16 abuts against the bottom of the sliding sleeve 10, so that the shearing pin 11 is sheared to release the sliding sleeve 10, when the sliding sleeve 10 moves upwards and abuts against the bottom end of the bottom plug 4, the alignment slotted hole 12 is communicated with the oil drainage port 9 in an alignment mode, high-pressure liquid in the bottom plug is discharged through the oil drainage port 9, the pressure relief effect is achieved, a non-pressure-difference passage is formed at the upper end and the lower end of the bottom plug 4, the suction phenomenon is avoided, all the pressurizing pipe columns and the bottom plug are convenient to release and go out of a well, and the safety and reliability of operation are improved.
Further, as shown in fig. 3 and 4, the lower end of the oil drainer shell 7 is sequentially connected with an oil drainer lower joint 13 and an outer thickened oil pipe 14, the oil drainer shell 7 is connected with the oil drainer lower joint 13 and the inner cavity of the outer thickened oil pipe 14 to form a channel, the pull rod 6 extends to the inside of the channel and can slide up and down in the channel, the lower end of the outer thickened oil pipe 14 is connected with an oil pipe blind plug 17 for plugging the channel, so that the channel is plugged at the bottom of the seal.
Further, as shown in fig. 3, the lower end of the oil drain casing 7 is in threaded connection with the oil drain lower joint 13, and the upper end of the outer thickened oil pipe 14 is in threaded connection with the lower end of the oil drain lower joint 13. Therefore, the connecting strength of the oil drain device shell 7, the oil drain device lower joint 13 and the external thickened oil pipe 14 is ensured, and the oil drain device has good sealing performance.
Further, as shown in fig. 3, the bottom plug 4 is in threaded connection with the oil drain device shell 7, so that the oil drain device shell 7 is conveniently connected with the bottom plug 4, and therefore, the connecting strength is guaranteed, and the oil drain device shell has good sealing performance.
Further, as shown in fig. 3, in order to ensure good sealing performance between the contact surfaces of the oil drain casing 7 and the sliding sleeve 10, on one hand, both contact surfaces need to have certain processing precision, and on the other hand, a sealing ring 8 is arranged between the oil drain casing 7 and the sliding sleeve 10 to ensure the sealing performance between the oil drain casing 7 and the sliding sleeve 10.
Further, as shown in fig. 2, an expansion cone 1 and an expansion cone seat 2 are further arranged at the upper end of the bottom plug 4 for connecting and fixing the expansion pipe 2. The structures above the expansion cone 1 and the expansion cone seat 2 are all the prior art and are not described in detail here.
Furthermore, a groove is formed in the outer wall of the pull rod 6, and a pull rod coupling 15 is installed in the groove to play a role in connecting and fixing the pull rod.
The utility model discloses automatic balanced pressure expands drags for application method of integration expansion pipe instrument, including following step:
in the process of descending and expanding the expansion pipe, the sliding sleeve 10 is connected and positioned with the oil drain device shell 7 through the shearing pin 11, so that the sliding sleeve 10 keeps the axial and radial relative positions fixed;
after the expansion pipe 2 is expanded, applying a lifting force to the expansion pipe 2 and the pull rod 6, enabling the pull rod 6 to move upwards, enabling the pull rod 6 to pull a bottom back nut 16 to abut against the lower end face of the sliding sleeve 10, continuously applying the lifting force, applying the lifting force to the sliding sleeve 10 through the back nut 16, applying the lifting force to the shearing pin 11 through the sliding sleeve 10, and shearing the shearing pin 11 to enable the sliding sleeve 10 to move upwards;
when the sliding sleeve 10 moves upwards and abuts against the lower end of the bottom plug 4, at the moment, the alignment slotted hole 12 on the sliding sleeve 10 is just communicated with the oil drainage port 9 of the oil drainage device shell 7, so that a non-pressure difference passage is formed between the upper end and the lower end of the bottom plug 4;
and continuously applying the lifting force, pulling the bottom plug 4 to move upwards by the pull rod 6 through the back nut 16 and the sliding sleeve 10, and fishing out the bottom plug 4 together with the expansion pipe 2, thereby realizing the expansion and fishing integrated function of the expansion pipe tool. In the process, due to the action of the oil drain device, the two ends of the bottom plug are communicated without pressure difference, so that the suction phenomenon is avoided, and finally all expansion tools are completely released and discharged from the well.
The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.
Claims (8)
1. An automatic pressure balancing expansion and fishing integrated expansion pipe tool comprises an expansion pipe and a bottom plug arranged at the bottom of the expansion pipe, a sliding pull rod penetrating through the expansion pipe and the bottom plug is arranged in the expansion pipe, it is characterized in that the lower end of the bottom plug is connected with an oil drain device, the oil drain device comprises an oil drain device shell sleeved outside the pull rod, a gap between the oil drain device shell and the pull rod forms an annular space, the sliding sleeve which can slide in the annular space is arranged in the annular space, a back nut which is outwards protruded along the radial direction is fixedly arranged at the bottom of the pull rod, an oil drainage port is arranged on the oil drainer shell along the radial direction, an alignment slotted hole is arranged on the sliding sleeve along the radial direction, the back nut can be abutted against the sliding sleeve and drives the sliding sleeve to slide in the annular space, and the alignment groove hole can be communicated with the oil drainage port in an alignment mode.
2. The automatic balanced pressure expansion and salvage integrated expansion pipe tool as claimed in claim 1, wherein said sliding sleeve is clamped with said drain body casing by a shear pin which can be cut off by external force, and the outer diameter of said back nut is larger than the inner diameter of said sliding sleeve and smaller than the inner diameter of said drain body casing.
3. The automatic pressure-balancing expansion-fishing integrated expansion pipe tool of claim 1, wherein the lower end of the oil drainer shell is sequentially connected with an oil drainer lower joint and an outer thickened oil pipe, the oil drainer shell, the oil drainer lower joint and the inner cavity of the outer thickened oil pipe are communicated to form a channel, the pull rod extends into the channel and can slide in the channel, and the lower end of the outer thickened oil pipe is connected with an oil pipe blind plug.
4. The automatic balanced pressure bailing integrated expansion pipe tool of claim 3, wherein the lower end of the oil drainer shell is in threaded connection with the lower joint of the oil drainer, and the upper end of the outer thickened oil pipe is in threaded connection with the lower end of the lower joint of the oil drainer.
5. The tool of claim 1, wherein the bottom plug is threadably connected to the drain body.
6. The tool of any one of claims 1 to 5, wherein a seal is provided between the drain housing and the sliding sleeve.
7. The tool for automatically balancing pressure and expanding and fishing the integrated expansion pipe as claimed in claim 1, wherein an expansion cone and an expansion cone seat are arranged at the upper end of the bottom plug.
8. The automatic pressure-balancing expansion-fishing integrated expansion pipe tool as claimed in claim 1, wherein a groove is formed on the outer wall of the pull rod, and a pull rod coupling is installed in the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202661227U CN202152654U (en) | 2011-07-26 | 2011-07-26 | Automatic pressure-balancing expansion-fishing integrated expansion pipe tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202661227U CN202152654U (en) | 2011-07-26 | 2011-07-26 | Automatic pressure-balancing expansion-fishing integrated expansion pipe tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202152654U true CN202152654U (en) | 2012-02-29 |
Family
ID=45693154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202661227U Expired - Lifetime CN202152654U (en) | 2011-07-26 | 2011-07-26 | Automatic pressure-balancing expansion-fishing integrated expansion pipe tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202152654U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296939A (en) * | 2011-07-26 | 2011-12-28 | 中国石油天然气股份有限公司 | Automatic pressure balancing expansion and fishing integrated expansion pipe tool and use method thereof |
-
2011
- 2011-07-26 CN CN2011202661227U patent/CN202152654U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102296939A (en) * | 2011-07-26 | 2011-12-28 | 中国石油天然气股份有限公司 | Automatic pressure balancing expansion and fishing integrated expansion pipe tool and use method thereof |
| CN102296939B (en) * | 2011-07-26 | 2014-02-19 | 中国石油天然气股份有限公司 | Automatic pressure balancing expansion and fishing integrated expansion pipe tool and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120229 Effective date of abandoning: 20140219 |
|
| RGAV | Abandon patent right to avoid regrant |