CN111980614B - Hydraulic large-angle bendable milling tool - Google Patents
Hydraulic large-angle bendable milling tool Download PDFInfo
- Publication number
- CN111980614B CN111980614B CN202010882792.5A CN202010882792A CN111980614B CN 111980614 B CN111980614 B CN 111980614B CN 202010882792 A CN202010882792 A CN 202010882792A CN 111980614 B CN111980614 B CN 111980614B
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- milling
- piston
- shoe
- milling tool
- hydraulic
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- 238000003801 milling Methods 0.000 title claims abstract description 61
- 239000000956 alloy Substances 0.000 claims abstract description 17
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 11
- 238000000227 grinding Methods 0.000 claims description 34
- 238000007789 sealing Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 241000251468 Actinopterygii Species 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
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
- E21B29/002—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe
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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)
- Milling Processes (AREA)
- Earth Drilling (AREA)
Abstract
The invention relates to a hydraulic large-angle bendable milling tool. The problem that the conventional milling tool cannot mill a lower fracture and a cutting fish head under the limitation of the drift diameter in a sleeve in the conventional milling tool in the small drift diameter or non-channel casing damage well treatment process is mainly solved. The method is characterized in that: the upper joint is in threaded connection with the body, and a piston is arranged in a cavity of the body; a return spring is sleeved on the small-diameter shaft of the piston; the center of a small sliding groove at the end of the small diameter shaft of the piston is aligned with the center of a screw hole on the body and is provided with a guide screw component; a flow dividing valve is arranged in the upper body of the large end of the piston; the bottom of the body is a conical surface; the outside bus of the milling shoe body is provided with a groove in an open slot at the lower part of the body, and efficient alloy particles are welded at the lower part of the milling shoe body; the lower cone part of the piston is propped against the conical surface at the upper part of the milling shoe body, and the milling shoe body is provided with a fold-line-shaped flow passage 16 from top to bottom. The hydraulic large-angle bendable milling tool can achieve the purposes of expanding, milling, cutting, finding fish heads and improving the success rate of repairing casing damage of the drilled passage.
Description
Technical Field
The invention relates to the technical field of oil field underground workover, in particular to a hydraulic large-angle bendable milling tool.
Background
At present, the difficulty of repairing an oil field casing damage well is increased, and in the treatment process of a small drift diameter or a channel-free casing damage well, the conventional milling tool cannot achieve the effects of milling a lower fracture and cutting a casing fish head due to the fact that the upper fracture and the lower fracture have large transverse displacement and are limited by the drift diameter in a casing, so that the treatment effect is influenced.
Disclosure of Invention
The invention aims to solve the technical problem that the fracture of an upper casing and a lower casing has large transverse displacement in the existing treatment process of a small drift diameter or a channel-free casing damage well in the background technology, and a conventional milling tool cannot mill the lower fracture and cut a fish head due to the restriction of the drift diameter in the casing.
The invention can solve the problems by the following technical scheme: the hydraulic large-angle bendable milling tool comprises an upper joint, wherein the upper joint is in threaded connection with a body, and a piston is arranged in a cavity of the body; a return spring is sleeved on the piston small-diameter shaft; the center of a small radial sliding groove at the end of the small-diameter shaft of the piston is aligned with the center of a screw hole formed on the body and is provided with a guide screw piece; a shunt valve element is arranged in the upper body of the large end of the piston; the milling shoe body is supported in an open slot at the lower part of the body, a bus at the outer side of the milling shoe body is provided with a groove, and the end surface at the lower part of the milling shoe body and the groove are embedded with high-efficiency alloy particles; the conical part at the lower part of the piston is propped against the conical surface at the relative upper part of the shoe grinding body; the milling shoe body is provided with a fold line-shaped flow passage from top to bottom.
Compared with the background technology, the invention has the following beneficial effects:
1. the shape of the shoe grinding body adopts a unique single-arm palm structure, and the diameter of the expanding grinding and milling is achieved through different lengths;
2. the bus on the outer side of the shoe grinding body is provided with a groove, and high-efficiency alloy particles are welded, so that the outer diameter is not reduced in the grinding and milling process;
3. efficient alloy particles are welded at the lower part of the shoe grinding body, the shape of the shoe grinding body is cutting type, and the cutting effect is ensured to achieve high efficiency through the difference of tooth heights;
4. the grinding shoe body is provided with a special tortuous flow passage to ensure that liquid flow passes smoothly, so that the grinding shoe body is cooled and rock debris flows upwards;
5. the connection of the shoe grinding body and the body adopts a pin shaft and is provided with a lock nut, the shearing strength of the pin shaft is enough to achieve the torque force generated in the milling process, thereby ensuring that the shoe grinding body can rotate around the pin shaft to achieve the purpose of free folding and unfolding and ensuring that the shoe grinding body is not damaged. In addition, the purpose of expanding, milling and grinding different diameters can be achieved by changing the milling shoe bodies with different lengths;
6. the body is provided with a guide screw, and the piston is provided with a guide groove, so that the conical part of the piston can move along a correct track and the conical surface of the shoe grinding body, and the shoe grinding body is pushed to expand and mill radially;
7. the contact part of the shoe grinding body and the piston adopts high-frequency quenching to ensure the local hardness, so that the shoe grinding body is not abraded in the working process, is erosion-resistant and prolongs the service life.
The hydraulic large-angle bendable milling tool is novel in structure, unique and reasonable in design concept, strong in applicability and high in performance, can effectively increase the transverse milling area by field construction aiming at casing damage wells with serious dislocation of uncapped well sections and large transverse displacement of upper and lower fractures, is matched with channel opening processes such as forging and milling, effectively opens a channel with the success rate of 67 percent and improves the success rate by more than 40 percent compared with the traditional technology, and is a domestic initiative.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a front view of the milling shoe body of FIG. 1 taken along direction B;
FIG. 3 is a schematic structural view showing a state in which a milling shoe body of the present invention is bent;
FIG. 4 is a front view of FIG. 3 taken along direction A;
FIG. 5 is a schematic structural view of the efficient alloy particles with saw-tooth shape on the shoe grinding body of the present invention;
fig. 6 is a side view of the milling shoe body of the present invention.
In the figure: 1. the device comprises an upper joint, 2, an O-shaped sealing ring, 3, an alloy nozzle, 4, a flow divider valve, 5, an O-shaped sealing ring, 6, a V-shaped sealing ring, 7, a body, 8, a return spring, 9, a piston, 10, a guide screw, 11, a pin shaft, 12, a lock nut, 13, a shoe grinding body, 14, high-efficiency alloy particles, 15, a groove, 16, a fold-line-shaped flow channel, 17 and a conical surface
The specific implementation mode is as follows:
the invention will be further explained below with reference to the accompanying drawings:
as shown in attached figures 1 and 3, the hydraulic large-angle bendable milling and grinding tool comprises an upper joint 1 and a grinding shoe body 13, wherein the upper joint 1 is in threaded connection with a body 7, a piston 9 is arranged in a cavity of the body 7, a V-shaped sealing ring piece 6 is arranged in a groove at the large end of the piston 9, and the opening of the sealing ring faces to the large end of the piston; a return spring 8 is sleeved on the small-diameter shaft of the piston; the center of a small radial sliding groove at the end of the small-diameter shaft of the piston is aligned with the center of a screw hole formed in the body, and a guide screw piece 10 is arranged in the small radial sliding groove, and the screw piece 10 is screwed in to enable a small shaft boss at the front end of the screw piece to enter the small piston sliding groove, so that the piston is blocked from being ejected; a shunt valve member 4 with an alloy nozzle 3 dried is arranged in the upper body of the big end of the piston, and an O-shaped sealing ring is arranged on the shunt valve member 4; the bottom of the body 7 is provided with a pin shaft hole, a grinding shoe body 13 is arranged in an open slot at the lower part of the body 7, the bottom of the body 7 is connected with the grinding shoe body 13 through a pin shaft 11 and a lock nut 12 which are connected in the pin shaft hole, the grinding shoe body is in a unique single-arm palm structure, as shown in figures 2, 4 and 6, a bus at the outer side of the grinding shoe body 13 is provided with a groove 15, the lower part of the grinding shoe body 13 is in a cylindrical shape, the end surface is an inclined surface, and the included angle between the inclined surface and the horizontal line of the bottom surface is 60 \65042mm; efficient alloy particles 14 are welded in the lower end face of the milling shoe body and the groove 15, and the groove 15 can enable the back of the milling shoe body 13 to have the functions of milling and trimming the fish head of the sleeve; the shape of the high-efficiency alloy particles 14 is cutting type, as shown in fig. 5, the tooth surface of the high-efficiency alloy particles is sawtooth-shaped and concave-convex fluctuated, the cutting effect is improved through the difference of tooth height, and the outer diameter is ensured not to be reduced in the milling process; in order to ensure that the cutting effect is efficient, the manufacturing range of the height difference between the sawteeth is 10-20 mm according to different steel-grade strengths of the casing to be repaired; the bottom of the body 17 is a conical surface, and the inclined surface part of the bottom surface of the end head of the body is matched with the conical inclined surface connecting surface in the middle of the shoe grinding body 13, so that the body is not exposed after the shoe grinding body 13 is opened to the maximum angle and is hidden in the shoe grinding body 13, and the structural integrity of the body 7 is protected; the arc of the head part of a pin shaft 11 of the body 7 connected with the shoe grinding body 13 is consistent with the arc of the body, so that the two ends of the pin shaft are not higher than the outer diameter of the body after being installed, and the pin shaft is ground into the arc consistent with the outer diameter of the body; the lower conical part of the piston 9 is pressed against the side conical surface of the upper part of the shoe grinding body 13; the milling shoe body 13 is provided with a fold-line-shaped flow channel 16 from top to bottom, is similar to L-shaped, and is pushed to the maximum bending angle by a piston after the milling shoe body is subjected to the action of the piston, so that the fold-line-shaped flow channel of the milling shoe body is communicated with the main flow channel in the tool upper body, namely, the upper end opening of the fold-line-shaped flow channel 16 faces the main flow channel in the tool body, and the circulating liquid can wash and cool the alloy on the milling shoe body and play a role of carrying rock debris and scrap iron.
The hydraulic large-angle bendable milling tool is assembled and used in a way that liquid flow formed under the pressure of a pump source flows into an inner cavity of the tool upper joint 1 through an upper drilling tool, due to the intercepting effect of the alloy nozzle 3, a part of the liquid flow passes through the alloy nozzle 3 and the flow dividing valve 4, the piston 9 is pushed to compress the reset spring 8 to move axially under the guiding effect of the guide screw 10, the piston 9 pushes the cone part on the upper part of the milling shoe body 13 at the same time of moving, the milling shoe body 13 slowly rotates along a pin shaft and radially expands for milling, and the liquid flow cleans and cools the milling shoe body 13 through the special bent flow channel on the milling shoe body 13 and carries cut rock debris back to a ground mud groove.
Claims (6)
1. The utility model provides a big angle of hydraulic power can be buckled milling tool, includes top connection (1), its characterized in that: the upper joint (1) is in threaded connection with the body (7), and a piston (9) is arranged in a cavity of the body (7); a return spring (8) is sleeved on the piston small-diameter shaft; the center of a small radial sliding groove at the end of the small diameter shaft of the piston is aligned with the center of a screw hole formed on the body, and a guide screw component (10) is arranged; a shunt valve member (4) is arranged in the upper body of the large end of the piston; a milling shoe body (13) is supported in an open slot at the lower part of the body (7), a groove (15) is arranged on a bus at the outer side of the milling shoe body (13), and efficient alloy particles (14) are welded and embedded in the groove (15) and the end surface at the lower part of the milling shoe body; the lower cone part of the piston (9) is pressed against the cone surface of the upper part of the shoe grinding body (13); the shoe grinding body (13) is provided with a fold-line-shaped flow passage from top to bottom;
the shape of the milling shoe is a single-arm palm structure, the lower part of the milling shoe body (13) is cylindrical, the end face of the cylindrical shape is an inclined plane, the upper part of the milling shoe body (13) is cuboid, an inclined tangent plane of the upper part of the cylindrical shape at the lower part of the milling shoe body (13) is a conical inclined plane, and the top of the milling shoe body (13) is a triangular cone; the body (7) is connected with the shoe grinding body by a pin shaft and a lock nut; the bottom of the body (7) is a conical surface which is matched with the conical inclined plane in the middle of the milling shoe body (13).
2. The hydraulic wide-angle bendable milling tool according to claim 1, characterized in that: the fold-line shaped flow channel (16) is similar to an L shape.
3. The hydraulic wide-angle bendable milling tool of claim 1, wherein: the alloy nozzle is arranged on the flow dividing valve (4) in a drying way.
4. The hydraulic wide-angle bendable milling tool according to claim 1, characterized in that: the tooth surface formed by the high-efficiency alloy particles is serrated, and the height difference between the serrations ranges from 10 mm to 20 mm.
5. The hydraulic wide-angle bendable milling tool of claim 1, wherein: and a V-shaped sealing ring piece is arranged in the groove at the big end of the piston, and the opening of the sealing ring faces the big end of the piston.
6. The hydraulic wide-angle bendable milling tool according to claim 1, characterized in that: and an O-shaped sealing ring is arranged on the flow dividing valve member (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882792.5A CN111980614B (en) | 2020-08-28 | 2020-08-28 | Hydraulic large-angle bendable milling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882792.5A CN111980614B (en) | 2020-08-28 | 2020-08-28 | Hydraulic large-angle bendable milling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111980614A CN111980614A (en) | 2020-11-24 |
| CN111980614B true CN111980614B (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010882792.5A Active CN111980614B (en) | 2020-08-28 | 2020-08-28 | Hydraulic large-angle bendable milling tool |
Country Status (1)
| Country | Link |
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| CN (1) | CN111980614B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114165181A (en) * | 2021-11-10 | 2022-03-11 | 四川沃德沃富石油科技有限公司 | Nozzle in guide mill shoe and mill shoe with nozzle |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6209645B1 (en) * | 1999-04-16 | 2001-04-03 | Schlumberger Technology Corporation | Method and apparatus for accurate milling of windows in well casings |
| CN1305562A (en) * | 1998-06-10 | 2001-07-25 | 国际壳牌研究有限公司 | Downhole milling device |
| CN2844406Y (en) * | 2005-08-22 | 2006-12-06 | 大庆油田有限责任公司 | Fluid power expanding combined segment milling cutter |
| CN2844405Y (en) * | 2005-08-22 | 2006-12-06 | 大庆油田有限责任公司 | The fluid power expanding expands milling cutter |
| CN101886529A (en) * | 2009-05-12 | 2010-11-17 | 崔朝轩 | Technique for repairing fault broken well and opening up passage |
| CN202280437U (en) * | 2011-11-02 | 2012-06-20 | 夏宪成 | Reverse section milling cutter |
| CN202417375U (en) * | 2012-02-03 | 2012-09-05 | 中国石油天然气股份有限公司 | Hydraulic expanding mill shoe |
| CN102704843A (en) * | 2012-05-09 | 2012-10-03 | 中国石油天然气股份有限公司 | Efficient drill for pilot hole |
| CN108412445A (en) * | 2018-05-21 | 2018-08-17 | 中国石油天然气股份有限公司 | Pen point milling cone with specially-made long conical surface channel finding function |
-
2020
- 2020-08-28 CN CN202010882792.5A patent/CN111980614B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1305562A (en) * | 1998-06-10 | 2001-07-25 | 国际壳牌研究有限公司 | Downhole milling device |
| US6209645B1 (en) * | 1999-04-16 | 2001-04-03 | Schlumberger Technology Corporation | Method and apparatus for accurate milling of windows in well casings |
| CN2844406Y (en) * | 2005-08-22 | 2006-12-06 | 大庆油田有限责任公司 | Fluid power expanding combined segment milling cutter |
| CN2844405Y (en) * | 2005-08-22 | 2006-12-06 | 大庆油田有限责任公司 | The fluid power expanding expands milling cutter |
| CN101886529A (en) * | 2009-05-12 | 2010-11-17 | 崔朝轩 | Technique for repairing fault broken well and opening up passage |
| CN202280437U (en) * | 2011-11-02 | 2012-06-20 | 夏宪成 | Reverse section milling cutter |
| CN202417375U (en) * | 2012-02-03 | 2012-09-05 | 中国石油天然气股份有限公司 | Hydraulic expanding mill shoe |
| CN102704843A (en) * | 2012-05-09 | 2012-10-03 | 中国石油天然气股份有限公司 | Efficient drill for pilot hole |
| CN108412445A (en) * | 2018-05-21 | 2018-08-17 | 中国石油天然气股份有限公司 | Pen point milling cone with specially-made long conical surface channel finding function |
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| CN111980614A (en) | 2020-11-24 |
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