CN109296330B - Hydraulic mouth repairing tool for expansion pipe - Google Patents
Hydraulic mouth repairing tool for expansion pipe Download PDFInfo
- Publication number
- CN109296330B CN109296330B CN201811202165.1A CN201811202165A CN109296330B CN 109296330 B CN109296330 B CN 109296330B CN 201811202165 A CN201811202165 A CN 201811202165A CN 109296330 B CN109296330 B CN 109296330B
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- Prior art keywords
- shell
- wall
- piston sleeve
- expansion pipe
- conical surface
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- 238000009966 trimming Methods 0.000 claims abstract description 15
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 230000004323 axial length Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 22
- 238000010276 construction Methods 0.000 description 9
- 239000002002 slurry Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000005507 spraying 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
Landscapes
- 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)
- Earth Drilling (AREA)
Abstract
The invention relates to a hydraulic mouth repairing tool for an expansion pipe, wherein a plurality of strip-shaped through grooves are formed in the side wall of the middle part of a shell, a blade body is arranged in each strip-shaped through groove, and a limiting block for stopping the blade body is arranged on the outer wall of the shell; a piston sleeve is sleeved in the shell in a sliding way, a first conical surface with a gradually reduced diameter from top to bottom is formed on the outer wall of the middle part of the piston sleeve opposite to the position of the blade body, a limit flange is formed on the outer wall of the piston sleeve below the conical surface, a reset spring is sleeved on the outer wall of the piston sleeve below the limit flange, and one side of the blade body, facing the inner wall of the shell, is a second conical surface which is in sliding contact with the first conical surface correspondingly; a throttling nozzle is arranged on the inner side of the top end of the piston sleeve; the inner wall of the shell is also provided with a positioning element which can stop the piston sleeve from moving upwards. The hydraulic mouth trimming tool for the expansion pipe can trim the straight steps at the upper end and the lower end of the expansion pipe to form an inner conical surface, so that a drilling tool can smoothly pass through the upper end and the lower end of the expansion pipe.
Description
Technical Field
The invention relates to petroleum and natural gas drilling equipment, in particular to a hydraulic mouth repairing tool for an expansion pipe.
Background
With the development of petroleum, well conditions are more and more complex, and multiple casing running and well cementation are often carried out in one drilling. Meanwhile, severe drilling accidents such as leakage, spraying, collapse, clamping and the like often occur during drilling. To reduce the cost and risk of drilling, and to simplify the well construction, technicians have begun to attempt to plug complex well sections using expansion tubing techniques in open hole sections.
As shown in fig. 1, after the open hole plugging construction of the expansion pipe is completed, a circle of straight steps 911 with the thickness equal to the wall thickness of the expansion pipe 91 are formed between the upper and lower ends of the expansion pipe 91 and the attached well wall 92. The creation of this straight step 911 may cause the following to occur: first, the generation of the straight step 911 directly causes the reduction of the well diameter; secondly, in the case where the diameter of some of the drilling assemblies 93 is very close to the borehole diameter, the drilling assemblies 93 may be difficult or even impossible to run in. Thirdly, the drill rods can sink to the bottom of the well due to the dead weight of the drill rods in the horizontal well section, and the joints of each drill rod can collide with the straight steps 911 due to the existence of the straight steps 911, so that long-time collision not only affects the service life of the expansion pipe 91, but also affects the service life of the drill rods.
Accordingly, the present inventors have developed a hydraulic repair tool for an expansion pipe to overcome the drawbacks of the prior art by years of experience and practice in the relevant industry.
Disclosure of Invention
The invention aims to provide a hydraulic mouth trimming tool for an expansion pipe, which is used for trimming straight steps at the upper end and the lower end of the expansion pipe to form an inner conical surface, so that a drilling tool can smoothly pass through the upper end and the lower end of the expansion pipe.
The invention aims to achieve the purpose, and the hydraulic mouth repairing tool for the expansion pipe comprises a cylindrical shell, wherein a plurality of axially extending strip-shaped through grooves are formed in the side wall of the middle of the shell at intervals along the circumferential direction of the shell, blade bodies capable of sliding along the radial direction of the shell are arranged in the strip-shaped through grooves, and limiting blocks for stopping the blade bodies from falling out of the strip-shaped through grooves are arranged on the outer wall of the shell and at the edges of the strip-shaped through grooves; the blade body is provided with a blade part on one side facing the outer wall of the shell, the longitudinal section shape of the blade part is that the middle part of the blade part is protruded forward towards the outer wall of the shell, and the upper part and the lower part of the blade part are gradually bent backwards from the middle part to the inner wall of the shell to form an inclined blade; a piston sleeve is sleeved in the shell in a sliding manner, and an axial through center hole is formed in the piston sleeve; the upper outer wall of the piston sleeve is hermetically and slidably arranged on the inner wall of the shell, a first conical surface with the diameter gradually reduced from top to bottom is formed on the middle outer wall of the piston sleeve opposite to the position of the blade body, a limit flange is formed on the outer wall of the piston sleeve below the conical surface, a reset spring is sleeved on the outer wall of the piston sleeve below the limit flange, the upper end of the reset spring is abutted against the limit flange, the lower end of the reset spring is abutted against a first annular stop shoulder of the inner wall of the shell, and a second annular stop shoulder capable of stopping the limit flange is further arranged on the inner wall surface of the shell above the first annular stop shoulder; the side, facing the inner wall of the shell, of the blade body is provided with a second conical surface which is in sliding contact with the first conical surface correspondingly; a throttling nozzle is arranged on the inner side of the top end of the piston sleeve; the inner wall of the shell is also provided with a positioning element which can stop the piston sleeve from moving upwards.
In a preferred embodiment of the present invention, the throttling nozzle is a pipe body with an inner diameter smaller than the diameter of the central hole of the piston sleeve; the inner wall surface of the top end of the piston sleeve is provided with an annular step with the diameter larger than that of the central hole of the piston sleeve, the throttling nozzle is embedded on the annular step, and the top end of the throttling nozzle is provided with a first check ring clamped on the inner wall of the piston sleeve.
In a preferred embodiment of the present invention, the positioning element is a baffle ring disposed above the piston sleeve and embedded in the inner wall of the housing, and a second retainer ring clamped in the inner wall of the housing is disposed at the top end of the baffle ring; the baffle ring is a ring body with a central perforation, and a plurality of through holes are arranged around the central perforation.
In a preferred embodiment of the invention, stepped holes with large, medium and small three-level pore diameters are formed in the shell from top to bottom; the plurality of strip-shaped through grooves are positioned at the large-aperture section of the stepped hole, and the peripheral surface of the limit flange of the piston sleeve is slidably arranged at the large-aperture section of the stepped hole; the outer diameter of the piston sleeve below the limit flange is the same as the diameter of the small-aperture section of the stepped hole and is arranged on the small-aperture section in a sliding manner; the reducing positions of the small-aperture section and the middle-aperture section form the first annular stop shoulder, and the reducing positions of the middle-aperture section and the large-aperture section form the second annular stop shoulder.
In a preferred embodiment of the invention, the side wall of the middle part of the shell is provided with an annular radial protruding section; the upper end of the annular radial protruding section forms an upper conical surface with an upward tapered diameter, and the lower end of the annular radial protruding section forms a lower conical surface with a downward tapered diameter; a plurality of axially extending rectangular sinking grooves are formed in the side wall of the shell at intervals along the circumferential direction of the side wall of the shell at the middle position of the annular radial protruding section between the upper conical surface and the lower conical surface, and the rectangular penetrating grooves are correspondingly formed in the bottoms of the rectangular sinking grooves; the axial length of the long strip-shaped through groove is smaller than that of the rectangular sinking groove, and the long strip-shaped through groove is positioned at the axial middle position of the rectangular sinking groove; the limiting block is arranged in the rectangular sinking groove and is positioned at the upper end and the lower end of the rectangular penetrating groove.
In a preferred embodiment of the present invention, the upper end and the lower end of the blade body are respectively provided with sliding contact parts which slide relative to the top surface and the bottom surface of the elongated through groove; the limiting block is stopped at the outer end of the moving path of the sliding contact part.
In a preferred embodiment of the present invention, the limiting block is fixed by an inner hexagon screw.
Therefore, the hydraulic mouth trimming tool for the expansion pipe can trim the straight steps at the upper end and the lower end of the expansion pipe to form an inner conical surface, so that a drilling tool can smoothly pass through the upper end and the lower end of the expansion pipe. According to the invention, the extension length of the blade body can be controlled by adjusting the pump pressure of the drilling pump; and the steps at the upper end and the lower end of the expansion pipe can be trimmed after one-time entering, so that the construction time and the construction cost are greatly saved.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
Fig. 1: the structural schematic diagram of the drilling tool passing through the expansion pipe is affected by a straight step after naked eye plugging in the prior art.
Fig. 2: is a schematic cross-sectional structure of the hydraulic mouth repairing tool for the expansion pipe.
FIG. 3 is a schematic perspective view of a hydraulic repair tool for an expansion pipe according to the present invention.
FIG. 4 is a schematic cross-sectional view of a hydraulic repair tool for an expansion tube of the present invention approaching the expansion tube.
FIG. 5 is a schematic diagram of the hydraulic port trimming tool for an expansion pipe trimming the straight step at the upper port of the expansion pipe.
FIG. 6 is a schematic diagram of the hydraulic port trimming tool for an expansion pipe trimming the straight step at the lower port of the expansion pipe.
FIG. 7 is a schematic view of the hydraulic tool for repairing an expansion pipe of the present invention after repairing the expansion pipe.
Reference numerals:
100. the hydraulic mouth repairing tool is used for expanding the pipe;
1. A housing;
11. a strip-shaped through groove;
13. a rectangular sink;
14. An annular radial projection;
141. An upper conical surface;
142. A lower conical surface;
15. the first annular shoulder;
16. the second annular shoulder;
2. a blade body;
21. A blade section;
211. a flat-faced blade;
212. a first beveled edge;
213. a second beveled edge;
22. a second conical surface;
23. a sliding contact portion;
3. a limiting block;
4. A piston sleeve;
41. A central bore;
42. A first conical surface;
43. A limit flange;
44. An annular step;
5. A return spring;
6. A throttle nozzle;
71. a first retainer ring;
72. The second check ring;
8. a baffle ring;
91. an expansion tube;
911. A straight step;
92. A well wall;
93. A drilling tool assembly;
94. And (3) drilling rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Unless defined otherwise, the directions of up and down, etc. referred to herein are all directions of up and down, etc. in fig. 2, which are shown in the present invention, and are described herein.
As shown in fig. 2 to 7, the present invention proposes a hydraulic mouth trimming tool 100 for an expansion pipe, which comprises a cylindrical housing 1, wherein a plurality of elongated through grooves 11 extending along an axial direction are provided on a side wall of a middle portion of the housing 1 at intervals along a circumferential direction thereof (in this embodiment, three elongated through grooves 11 are uniformly distributed), a blade body 2 capable of sliding along a radial direction of the housing 1 is provided in the elongated through grooves 11, and a stopper 3 for stopping the blade body 2 from being separated from the elongated through grooves 11 is provided on an outer wall of the housing 1 and at an edge of the elongated through grooves 11; the blade body 2 is provided with a blade part 21 on one side facing the outer wall of the shell 1, the longitudinal section shape of the blade part 21 is a straight blade 211 which is convexly formed in the front direction from the middle part to the outer wall of the shell 1, and the upper part and the lower part are gradually bent backwards from the middle part to the inner wall of the shell 1 to form a first inclined blade 212 and a second inclined blade 213; a piston sleeve 4 is sleeved in the shell 1 in a sliding way, and a central hole 41 which is axially penetrated is arranged in the piston sleeve 4; the upper outer wall of the piston sleeve 4 is hermetically and slidably arranged on the inner wall of the shell 1, a first conical surface 42 with a gradually reduced diameter from top to bottom is formed on the middle outer wall of the piston sleeve 4 opposite to the blade body 2, a limit flange 43 is formed on the outer wall of the piston sleeve below the first conical surface 42, a return spring 5 is sleeved on the outer wall of the piston sleeve below the limit flange 43, the upper end of the return spring 5 is abutted against the bottom surface of the limit flange 43, the lower end of the return spring 5 is abutted against a first annular stop shoulder 15 on the inner wall of the shell 1, and a second annular stop shoulder 16 capable of stopping the limit flange 43 is further arranged on the inner wall surface of the shell above the first annular stop shoulder (when the hydraulic mouth repairing tool 100 does not work, the limit flange 43 and the second annular stop shoulder have a distance so that the piston sleeve 4 is driven to move downwards by hydraulic pressure); the side of the blade body 2 facing the inner wall of the shell is provided with a second conical surface 22 which is in sliding contact with the first conical surface 42 correspondingly; a throttling nozzle 6 is arranged on the inner side of the top end of the piston sleeve 4; the inner wall of the housing 1 is also provided with a positioning element which can stop the piston sleeve 4 from moving upwards. The upper and lower ends of the housing 1 are provided with threads to which drill rods or other tools can be attached.
After the expansion pipe 9 completes expansion operation, the hydraulic mouth repairing tool 100 for the expansion pipe is connected with the drill rod 94 and is put into the well; the hydraulic mouth repairing tool 100 for the expansion pipe works in a pressure difference opening mode, when the hydraulic mouth repairing tool is put in place, a slurry pump (a drilling pump) is started, slurry pressure acts on a piston sleeve 4 through a throttling nozzle 6, slurry throttles at the throttling nozzle 6 at the upper end of the piston sleeve 4 to generate pressure difference, the piston sleeve 4 descends, a first conical surface 42 pushes a second conical surface 22 so as to push a blade body 2 out of a strip-shaped through groove 11, and a limiting block 3 is arranged at the outer side of the blade body 2 and can limit the blade body to a proper position; a limit flange 43 is arranged below the piston sleeve 4, the piston sleeve 4 is limited in a proper position, and when the limit flange 43 touches the second annular stop shoulder, the blade body 2 completely extends out of the shell 1; the protruding length of the blade body 2 can be adjusted by the pump pressure of the slurry pump. Starting the turntable, and driving the whole hydraulic mouth repairing tool to rotate by the drill rod through the connected shell, so that the extended blade body can cut the port of the expansion pipe to form an inner chamfer; the hydraulic mouth repairing tool adopts a double-sided blade design, can repair the bottom end of the expansion pipe, can repair the top of the expansion pipe, and finally enables the straight steps of the upper end surface and the lower end surface of the expansion pipe to form an inner conical surface so as to achieve the purposes of reducing resistance and preventing subsequent pipe strings from colliding with and hanging cards. When the construction is completed, the drill string stops rotating, the drilling pump stops supplying pressure, and the piston sleeve 4 returns to the original position under the combined action of the lower return spring 5 and the upper end positioning element. After the double-sided blade body loses the support of the piston sleeve 4, the blade body can retract into the shell when being lifted up or lowered down. The hydraulic mouth repairing tool for the expansion pipe is convenient to lift.
Therefore, the hydraulic mouth trimming tool for the expansion pipe can trim the straight steps at the upper end and the lower end of the expansion pipe to form an inner conical surface, so that a drilling tool can smoothly pass through the upper end and the lower end of the expansion pipe. According to the invention, the extension length of the blade body can be controlled by adjusting the pump pressure of the drilling pump; and the steps at the upper end and the lower end of the expansion pipe can be trimmed after one-time entering, so that the construction time and the construction cost are greatly saved.
Further, as shown in fig. 2,3 and 4, in the present embodiment, the throttle nozzle 6 is a pipe body having an inner diameter smaller than the diameter of the central hole 41 of the piston sleeve; the inner wall surface of the top end of the piston sleeve 4 is provided with an annular step 44 with the diameter larger than that of the central hole 41 of the piston sleeve, the throttle nozzle 6 is embedded on the annular step 44, and the top end of the throttle nozzle 6 is provided with a first check ring 71 (which is an elastic check ring for the existing hole) clamped on the inner wall of the piston sleeve 4. The positioning element is a baffle ring 8 which is arranged above the piston sleeve 4 and embedded in the inner wall of the shell 1, and a second check ring 72 which is clamped in the inner wall of the shell is arranged at the top end of the baffle ring 8; the baffle ring 8 is a ring body with a central through hole, and a plurality of through holes are arranged around the central through hole.
As shown in fig. 2 and 3, in the present embodiment, stepped holes with three-level diameters of large, medium and small are formed from top to bottom in the housing 1; the plurality of long strip-shaped through grooves 11 are positioned at the large-aperture section of the stepped hole, and the peripheral surface of the limit flange 43 of the piston sleeve 4 is also arranged at the large-aperture section of the stepped hole in a sliding manner; the outer diameter of the piston sleeve below the limit flange 43 is the same as the diameter of the small-aperture section of the stepped hole and is arranged on the small-aperture section in a sliding manner; the reducing parts of the small-aperture section and the middle-aperture section form the first annular stop shoulder 15, and the reducing parts of the middle-aperture section and the large-aperture section form the second annular stop shoulder 16.
In the embodiment, the side wall of the middle part of the shell 1 is provided with a section of annular radial protruding section 14; the upper end of the annular radial protruding section 14 forms an upper conical surface 141 with an upward tapered diameter, and the lower end of the annular radial protruding section forms a lower conical surface 142 with a downward tapered diameter; a plurality of axially extending rectangular sinking grooves 13 are formed in the outer side wall of the shell 1 at intervals along the circumferential direction of the shell at the middle position of the annular radial protruding section between the upper conical surface and the lower conical surface, and the rectangular penetrating grooves 11 are correspondingly formed in the bottoms of the rectangular sinking grooves 13; the axial length of the long strip-shaped through groove 11 is smaller than that of the rectangular sinking groove 13, and the long strip-shaped through groove 11 is positioned at the axial middle position of the rectangular sinking groove 13; the limiting block 3 is arranged in the rectangular sinking groove 13 and is positioned at the upper end and the lower end of the rectangular penetrating groove 11.
In the present embodiment, the upper end and the lower end of the blade body 2 are respectively provided with sliding contact parts 23 which slide relative to the top surface and the bottom surface of the elongated through groove 11; the stopper 3 is stopped at the outer end of the moving path of the sliding contact portion 23. The limiting block 3 is fixed in the rectangular sinking groove 13 by an inner hexagon screw.
As shown in fig. 4, when the hydraulic mouth-repairing tool for an expansion pipe of the present invention approaches the expansion pipe, since the annular radial projecting section 14 in the middle of the housing 1 is provided with the upper tapered surface 141 and the lower tapered surface 142, the hydraulic mouth-repairing tool is easily accessed from the port of the expansion pipe.
As shown in fig. 5 and 6, the hydraulic mouth trimming tool for the expansion pipe respectively trims the upper port straight step and the lower port straight step of the expansion pipe. As shown in fig. 7, after the port of the expansion pipe is trimmed, the drilling tool can easily pass through the expansion pipe, and the condition that the drilling tool collides with the port of the expansion pipe can not occur.
The hydraulic mouth trimming tool for the expansion pipe can trim the straight steps at the upper end and the lower end of the expansion pipe to form an inner conical surface, so that a drilling tool can smoothly pass through the upper end and the lower end of the expansion pipe. According to the invention, the extension length of the blade body can be controlled by adjusting the pump pressure of the drilling pump; and the steps at the upper end and the lower end of the expansion pipe can be trimmed after one-time entering, so that the construction time and the construction cost are greatly saved.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention.
Claims (7)
1. The hydraulic mouth repairing tool for the expansion pipe is characterized by comprising a cylindrical shell, wherein a plurality of axially extending strip-shaped through grooves are formed in the side wall of the middle of the shell at intervals along the circumferential direction of the shell, blade bodies capable of sliding along the radial direction of the shell are arranged in the strip-shaped through grooves, and limiting blocks for stopping the blade bodies from falling out of the strip-shaped through grooves are arranged on the outer wall of the shell and positioned at the edges of the strip-shaped through grooves; the blade body is provided with a blade part on one side facing the outer wall of the shell, the longitudinal section shape of the blade part is that the middle part of the blade part is protruded forward towards the outer wall of the shell, and the upper part and the lower part of the blade part are gradually bent backwards from the middle part to the inner wall of the shell to form an inclined blade; a piston sleeve is sleeved in the shell in a sliding manner, and an axial through center hole is formed in the piston sleeve; the upper outer wall of the piston sleeve is hermetically and slidably arranged on the inner wall of the shell, a first conical surface with the diameter gradually reduced from top to bottom is formed on the middle outer wall of the piston sleeve opposite to the position of the blade body, a limit flange is formed on the outer wall of the piston sleeve below the conical surface, a reset spring is sleeved on the outer wall of the piston sleeve below the limit flange, the upper end of the reset spring is abutted against the limit flange, the lower end of the reset spring is abutted against a first annular stop shoulder of the inner wall of the shell, and a second annular stop shoulder capable of stopping the limit flange is further arranged on the inner wall surface of the shell above the first annular stop shoulder; the side, facing the inner wall of the shell, of the blade body is provided with a second conical surface which is in sliding contact with the first conical surface correspondingly; a throttling nozzle is arranged on the inner side of the top end of the piston sleeve; the inner wall of the shell is also provided with a positioning element which can stop the piston sleeve from moving upwards, and the upper end and the lower end of the shell are provided with threads.
2. The hydraulic port tool for an expansion pipe of claim 1, wherein the throttle nozzle is a pipe body having an inner diameter smaller than a diameter of a center hole of the piston sleeve; the inner wall surface of the top end of the piston sleeve is provided with an annular step with the diameter larger than that of the central hole of the piston sleeve, the throttling nozzle is embedded on the annular step, and the top end of the throttling nozzle is provided with a first check ring clamped on the inner wall of the piston sleeve.
3. The hydraulic mouth repairing tool for the expansion pipe according to claim 2, wherein the positioning element is a baffle ring which is arranged above the piston sleeve and embedded in the inner wall of the shell, and a second retainer ring which is clamped in the inner wall of the shell is arranged at the top end of the baffle ring; the baffle ring is a ring body with a central perforation, and a plurality of through holes are arranged around the central perforation.
4. The hydraulic mouth trimming tool for expansion pipe according to claim 1, wherein the inside of the outer shell is formed with stepped holes with three-level diameters of large, medium and small from top to bottom; the plurality of strip-shaped through grooves are positioned at the large-aperture section of the stepped hole, and the peripheral surface of the limit flange of the piston sleeve is slidably arranged at the large-aperture section of the stepped hole; the outer diameter of the piston sleeve below the limit flange is the same as the diameter of the small-aperture section of the stepped hole and is arranged on the small-aperture section in a sliding manner; the reducing positions of the small-aperture section and the middle-aperture section form the first annular stop shoulder, and the reducing positions of the middle-aperture section and the large-aperture section form the second annular stop shoulder.
5. The hydraulic mouth trimming tool for an expansion pipe according to claim 1, wherein the side wall of the middle part of the outer shell is provided with a section of annular radial protruding section; the upper end of the annular radial protruding section forms an upper conical surface with an upward tapered diameter, and the lower end of the annular radial protruding section forms a lower conical surface with a downward tapered diameter; a plurality of axially extending rectangular sinking grooves are formed in the side wall of the shell at intervals along the circumferential direction of the side wall of the shell at the middle position of the annular radial protruding section between the upper conical surface and the lower conical surface, and the rectangular penetrating grooves are correspondingly formed in the bottoms of the rectangular sinking grooves; the axial length of the long strip-shaped through groove is smaller than that of the rectangular sinking groove, and the long strip-shaped through groove is positioned at the axial middle position of the rectangular sinking groove; the limiting block is arranged in the rectangular sinking groove and is positioned at the upper end and the lower end of the rectangular penetrating groove.
6. The hydraulic mouth trimming tool for an expansion pipe according to claim 5, wherein the upper end and the lower end of the blade body are respectively provided with sliding contact parts which slide relatively to the top surface and the bottom surface of the elongated through slot; the limiting block is stopped at the outer end of the moving path of the sliding contact part.
7. The hydraulic repair tool for an expansion pipe of claim 6, wherein the stopper is fixed by an socket head cap screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811202165.1A CN109296330B (en) | 2018-10-16 | 2018-10-16 | Hydraulic mouth repairing tool for expansion pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811202165.1A CN109296330B (en) | 2018-10-16 | 2018-10-16 | Hydraulic mouth repairing tool for expansion pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109296330A CN109296330A (en) | 2019-02-01 |
| CN109296330B true CN109296330B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811202165.1A Active CN109296330B (en) | 2018-10-16 | 2018-10-16 | Hydraulic mouth repairing tool for expansion pipe |
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| Country | Link |
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| CN (1) | CN109296330B (en) |
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2018
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|---|---|---|---|---|
| US5018580A (en) * | 1988-11-21 | 1991-05-28 | Uvon Skipper | Section milling tool |
| US6283211B1 (en) * | 1998-10-23 | 2001-09-04 | Polybore Services, Inc. | Method of patching downhole casing |
| CN2866799Y (en) * | 2005-05-12 | 2007-02-07 | 刘志洲 | Oilwell casing reconditioning tool |
| CN101812980A (en) * | 2010-02-03 | 2010-08-25 | 华鼎鸿基石油工程技术(北京)有限公司 | Expansion tube assembly, oil well subsidy construction mechanism and construction method |
| CN105201408A (en) * | 2015-09-06 | 2015-12-30 | 中国石油天然气集团公司 | Near-bit reamer |
| CN107780861A (en) * | 2017-09-27 | 2018-03-09 | 海林新科石油耐磨工具有限责任公司 | Casing damaged well diameter enlarging instrument |
| CN209369760U (en) * | 2018-10-16 | 2019-09-10 | 中国石油天然气集团有限公司 | Hydraulic for expansion tube repairs a mouthful tool |
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| CN109296330A (en) | 2019-02-01 |
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