CN111749636A - Multi-layer casing windowing mill shoe - Google Patents
Multi-layer casing windowing mill shoe Download PDFInfo
- Publication number
- CN111749636A CN111749636A CN202010658527.9A CN202010658527A CN111749636A CN 111749636 A CN111749636 A CN 111749636A CN 202010658527 A CN202010658527 A CN 202010658527A CN 111749636 A CN111749636 A CN 111749636A
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- CN
- China
- Prior art keywords
- shoe
- pressure
- milling
- mill
- mill shoe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003801 milling Methods 0.000 claims abstract description 49
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 9
- 239000011159 matrix material Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract description 17
- 239000012530 fluid Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 8
- 238000005520 cutting process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 206010024796 Logorrhoea Diseases 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011435 rock Substances 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
- E21B29/005—Cutting, e.g. milling, a pipe with a cutter rotating along the circumference of the pipe with a radially-expansible cutter rotating inside the pipe, e.g. for cutting an annular window
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 multi-layer casing windowing milling shoe, which consists of a milling shoe body, a pressure transmission sleeve, a pressure transmission plug, a copper pipe and a collarband milling shoe, wherein the upper part of the milling shoe body is in a drill rod buckle type and is connected with an upper drilling tool. The unique pressure generation design of the multi-layer casing windowing mill shoe ensures that the inside and the outside of a drill string are communicated by fluid in the drilling process, ensures the well control safety due to the inside and the outside of a drilling tool are communicated, and is convenient for the treatment of a circulating isobaric well even if a well control dangerous condition exists. The unique design of the pilot milling shoe and the flexible milling shoe not only improves the milling speed, but also enhances the milling stability.
Description
Technical Field
The invention belongs to the technical field of petroleum operation equipment, and particularly relates to a multi-layer casing windowing milling shoe.
Background
The working condition of double-layer and multi-layer sleeve windowing is frequently met in the windowing operation process, due to the influences of the size, the wall thickness, the steel-grade strength of each layer of sleeve, the distance between two adjacent layers of sleeves and the like, the length of a double-layer multi-layer sleeve windowing window is increased, the window forming difficulty is increased, accidents of technical sleeves cannot be frequently caused by sidetracking, and the windowing efficiency and the success rate of the conventional mill shoe windowing of the sleeves are low, so that the required windowing standard cannot be met.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a multi-layer casing windowing grind shoe.
The invention relates to a multi-layer casing windowing grind shoe, which consists of a grind shoe body, a pressure transmission sleeve, a pressure transmission plug, a copper pipe and a pilot grind shoe, wherein the upper part of the grind shoe body is in a drill rod buckle type and is connected with an upper drilling tool; the upper end of the mill shoe body is provided with a pressure plug hole which penetrates through the mill shoe body and is communicated with the annular groove, a pressure transfer plug is arranged in the pressure plug hole, the outer end of the pressure transfer plug is communicated with a copper pipe, and the other end of the copper pipe is anchored and connected with the windowing; the periphery of the outer surface of the lower end of the mill shoe body is fixed with a flexible mill shoe, and the bottom of the mill shoe body is fixed with a collarband mill shoe.
As a further improvement of the invention, locating pins pass through the mill casing to secure the outer wall of the pressure transfer sleeve to the mill casing.
As a further improvement of the invention, three pressure transmission holes are uniformly distributed on the circumference of the pressure transmission sleeve.
As a further improvement of the invention, the collar-eye milling shoe is a multi-blade collar-eye milling shoe formed by arranging more than one blade side by side, and the bottom of the milling shoe body between the adjacent blades is provided with a water hole II communicated with the inner cavity of the milling shoe body.
As a further improvement of the invention, the contact surfaces of the upper end and the lower end of the pressure transfer sleeve and the tire body of the grinding shoe are respectively sealed by an upper sealing ring and a lower sealing ring.
As a further improvement of the invention, the cover cap of the pressure transmitting plug is provided with a shoulder, and the nut for fixing the pin is pressed on the shoulder of the pressure transmitting plug and fixed on the body of the mill shoe.
As a further improvement of the invention, the outer diameter of the flexible grind shoe is larger than the outer diameter of the collar grind shoe.
The unique pressure generation design of the multi-layer casing windowing mill shoe ensures that the inside and outside fluid communication pressure of a drill string is balanced in the drilling process, the grouting step is omitted, the inside and outside communication of a drilling tool ensures the well control safety, and the circulating isobaric well treatment is facilitated even if a well control dangerous situation exists. The unique design of the pilot milling shoe and the flexible milling shoe improves the milling speed and enhances the milling stability to enable the window to be smoother.
Drawings
FIG. 1 is a schematic structural view of a multi-layer bushing fenestration mill shoe of the present invention;
FIG. 2 is a cross-sectional view of a multi-layer shoe mill in accordance with the invention.
Detailed Description
The invention relates to a multi-layer casing windowing milling shoe, which consists of a milling shoe body 1, a pressure transmitting sleeve 2, a pressure transmitting plug 10, a copper pipe 11 and a pilot milling shoe 14, wherein the upper part of the milling shoe body 1 is in a drill pipe buckle type and is connected with an upper drilling tool, the milling shoe body 1 is in a hollow structure, a shoulder is arranged at the lower end of the inner wall, the bottom of the pressure transmitting sleeve 2 is seated on the shoulder, the upper end and the lower end of the pressure transmitting sleeve 2 are tightly matched with the inner wall of the milling shoe body 1, an annular groove is arranged in the middle of the outer wall of the milling shoe body 1 to form an annular gap 17 with the inner wall of the milling shoe body 1, so that fluid can be conveniently transmitted through pressure, the upper end and the lower end of the pressure transmitting sleeve 2 are respectively sealed with the contact surface of the milling shoe body 1 through an upper sealing ring 3 and. Four fetching and delivering holes 8 are uniformly formed in the same circumference of the outer wall of the upper end of the pressure transmission sleeve 2, so that a fetching and delivering tool can conveniently eat the holes and then install or take out the pressure transmission sleeve 2, three pressure transmission holes 6 uniformly distributed along the circumference and two longitudinal pressure transmission seams 7 are respectively formed in the sleeve body of the pressure transmission sleeve 2 and are communicated with the annular gap 17, a water hole I5 is formed in the lower end of the pressure transmission sleeve 2, and pressure drop can be generated when fluid passes through the water hole I5. The upper end of the mill shoe matrix 1 is provided with a pressure plug hole penetrating through the matrix, the pressure transfer plug 10 is inserted into the pressure plug hole on the mill shoe matrix 1, a shoulder is arranged on a cap of the pressure transfer plug 10, the area of the shoulder is designed according to requirements, the adjustment direction of the pressure transfer plug 10 can be met, the milling part of the blade is avoided, a nut of the fixing pin 12 is pressed on the shoulder of the pressure transfer plug 10 and used for fixing the pressure transfer plug 10 to prevent the pressure transfer plug from falling off, the outer end of the pressure transfer plug 10 is communicated with a copper pipe 11, and the other end of the copper pipe 11 is connected with the windowing anchoring and is used for fluid. The periphery of the outer surface of the lower end of the milling shoe body 1 is fixed with a flexible milling shoe 15 for stabilizing the window direction and expanding the inner diameter of the window, each blade of the flexible milling shoe 15 is provided with a back plate, the front cutting surface of the back plate is welded with hard alloy, the bottom of the milling shoe body 1 is fixed with a pilot milling shoe 14, the pilot milling shoe 14 is formed by arranging more than one blade in parallel to form a multi-blade pilot milling shoe, and the bottom of the milling shoe body 1 between adjacent blades is provided with a water eye II 16 communicated with the inner cavity of the milling shoe body 1. There is certain distance between flexible junk mill 15 and the pilot grind shoe 14 and the external diameter of flexible junk mill 15 is greater than the external diameter of pilot grind shoe 14, and pilot grind shoe 14 is equipped with the base member backplate, and the backplate excircle suitably widens, plays the stabilizing effect when 14 cuttings sleeve pipes of pilot grind shoe, and the preceding smear metal face of 14 backplates of pilot grind shoe welds carbide, and the carbide rear end is overlaying welding garrulous alloy.
The lower part of the milling shoe carcass 1 is provided with a connecting pin 13, one end of the connecting pin 13 is provided with a screw thread which penetrates through the carcass, and when the whipstock is required to be used, the milling shoe carcass 1 is connected with the whipstock. The center of the bottom of the pilot grind shoe 14 is located behind the hard alloy and the broken alloy is deposited by welding, fluid flows to the water hole I5 from the inside of the pressure transmission sleeve 2, flows out from the water hole at each blade of the pilot grind shoe 14 through the water hole I5 and the water hole II 16, is used for cooling the hard alloy and carrying chips after cutting along the flow guide groove, the pressure transmission holes 6 and the pressure transmission seams 7 on the outer wall of the pressure transmission sleeve 2 are used for the fluid to pass through, and the pressure can be transmitted to the pressure transmission plugs 10 and the copper pipe 11. The outer diameter of the pilot grind shoe 14 is slightly smaller than the outer diameter of the flexible grind shoe 15, the sleeve can be rapidly windowed, after the pilot grind shoe 14 finishes cutting the sleeve, the flexible grind shoe 15 is smoothly transited to and continues windowing, the inner diameter of the window is enlarged, the flexible grind shoe 15 and the central shaft of the grind shoe matrix 1 form an included angle, rock debris can be cut and carried, hard alloy or crushed alloy is designed at the rear end of the blade, window repairing is facilitated, the smooth drilling of the grind shoe into the sleeve is ensured, the number of layers of the sleeve which can be windowed according to needs is designed, the type and the number of the hard alloy are designed, and the requirement of multi-layer windowing is met.
Claims (7)
1. A multi-layer casing windowing mill shoe comprises a mill shoe matrix (1), a pressure transmitting sleeve (2), a pressure transmitting plug (10), a copper pipe (11) and a pilot mill shoe (14), wherein the upper part of the mill shoe matrix (1) is in a drill pipe buckle type and is connected with an upper drilling tool, the multi-layer casing windowing mill shoe is characterized in that the mill shoe matrix (1) is in a hollow structure, a shoulder is arranged at the lower end of the inner wall, the bottom of the pressure transmitting sleeve (2) is seated on the shoulder, the upper end and the lower end of the pressure transmitting sleeve are tightly matched with the inner wall of the mill shoe matrix (1), an annular groove is arranged in the middle of the outer wall of the mill shoe matrix (1) to form an annular gap (17), a taking and delivering hole (8) is formed in the outer wall of the upper end of the pressure transmitting sleeve (2), a water hole I (5) is arranged at the lower end of the pressure transmitting sleeve body of the pressure transmitting sleeve (2), and a pressure transmitting; the upper end of the mill shoe matrix (1) is provided with a pressure plug hole which penetrates through the matrix and is communicated with the annular groove (17), a pressure transfer plug (10) is arranged in the pressure plug hole, the outer end of the pressure transfer plug (10) is communicated with a copper pipe (11), and the other end of the copper pipe (11) is anchored and connected with the windowing; the periphery of the outer surface of the lower end of the milling shoe body (1) is fixed with a flexible milling shoe (15), and the bottom is fixed with a pilot milling shoe (14).
2. The multi-layer casing fenestration mill shoe according to claim 1, characterized in that a dowel (9) passes through the mill shoe carcass (1) to fix the outer wall of the pressure transfer casing (2) to the mill shoe carcass (1).
3. The multi-layer casing windowing milling shoe according to claim 1, characterised in that three pressure transfer holes (6) are evenly distributed around the circumference of the pressure transfer casing (2).
4. The multi-layer casing windowing milling shoe as claimed in claim 1, characterized in that the pilot milling shoe (14) is a multi-blade pilot milling shoe formed by arranging more than one blade side by side, and the bottom of the milling shoe body (1) between adjacent blades is provided with a water hole (16) communicated with the inner cavity of the milling shoe body (1).
5. The multi-layer casing windowing milling shoe as claimed in claim 1, characterized in that the upper and lower ends of the pressure-transmitting casing (2) are sealed with the contact surface of the milling shoe carcass (1) by an upper sealing ring (3) and a lower sealing ring (4), respectively.
6. The multi-layer casing fenestration mill shoe according to claim 1, characterized in that the cap of the pressure-transmitting closure (10) is provided with a shoulder, and the nut of the fixing pin (12) is pressed against the shoulder of the pressure-transmitting closure (10) and fixed to the mill shoe carcass (1).
7. The multi-layer sleeve fenestrated mill shoe according to claim 1, characterized in that the outer diameter of the flexible mill shoe (15) is larger than the outer diameter of the pilot mill shoe (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658527.9A CN111749636A (en) | 2020-07-09 | 2020-07-09 | Multi-layer casing windowing mill shoe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010658527.9A CN111749636A (en) | 2020-07-09 | 2020-07-09 | Multi-layer casing windowing mill shoe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111749636A true CN111749636A (en) | 2020-10-09 |
Family
ID=72710151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010658527.9A Pending CN111749636A (en) | 2020-07-09 | 2020-07-09 | Multi-layer casing windowing mill shoe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111749636A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282685A (en) * | 2020-11-11 | 2021-01-29 | 北京佰文恒新能源服务有限公司 | Multistage outer diameter windowing mill shoe for multiple thick-wall pipes |
| 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 (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030183388A1 (en) * | 2002-03-28 | 2003-10-02 | Toulouse Jeffrey E. | One trip through tubing window milling apparatus and method |
| RU91100U1 (en) * | 2009-09-29 | 2010-01-27 | Общество с ограниченной ответственностью "Биттехника" | HYDRAULIC DIVERS |
| CN102182415A (en) * | 2011-04-06 | 2011-09-14 | 中国海洋石油总公司 | Efficient milling cone with guide tool |
| CN102943628A (en) * | 2012-11-15 | 2013-02-27 | 西南石油大学 | Double-layered casing windowing drillbit |
| CN104100202A (en) * | 2014-07-07 | 2014-10-15 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Starting valve for controlling orientation anchoring of whipstock |
| CN105649564A (en) * | 2016-03-31 | 2016-06-08 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Tool string for one-drill-trip window sidetrack drilling of open-hole horizontal well and technological method |
| US20160237770A1 (en) * | 2015-02-18 | 2016-08-18 | Weatherford Technology Holdings, Llc | Cutting tool |
| CN106988699A (en) * | 2017-05-10 | 2017-07-28 | 中国海洋石油总公司 | An a kind of formula side-drilling windowing milling cone instrument |
| CN107100574A (en) * | 2017-05-10 | 2017-08-29 | 中国海洋石油总公司 | A kind of integral type sidetracking window opening tool assembly |
| CN108104753A (en) * | 2017-12-18 | 2018-06-01 | 海林新科石油耐磨工具有限责任公司 | Integrated high-efficiency sidetrack drilling tool |
| CN108240217A (en) * | 2016-12-26 | 2018-07-03 | 中国石油天然气股份有限公司 | A kind of test plunger to recover the oil for plunger lift and test system |
| CN208885235U (en) * | 2018-09-28 | 2019-05-21 | 中石化石油工程技术服务有限公司 | A kind of horizontal well drag fracturing tubing string and its tail end packer |
| CN209308635U (en) * | 2019-01-14 | 2019-08-27 | 成都百施特金刚石钻头有限公司 | PDC drill bit with multiple stage crushing function |
| CN110748313A (en) * | 2019-10-28 | 2020-02-04 | 锦州清华机械有限公司 | Wireless self-orienting hydraulic integrated windowing sidetrack drilling tool |
-
2020
- 2020-07-09 CN CN202010658527.9A patent/CN111749636A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030183388A1 (en) * | 2002-03-28 | 2003-10-02 | Toulouse Jeffrey E. | One trip through tubing window milling apparatus and method |
| RU91100U1 (en) * | 2009-09-29 | 2010-01-27 | Общество с ограниченной ответственностью "Биттехника" | HYDRAULIC DIVERS |
| CN102182415A (en) * | 2011-04-06 | 2011-09-14 | 中国海洋石油总公司 | Efficient milling cone with guide tool |
| CN102943628A (en) * | 2012-11-15 | 2013-02-27 | 西南石油大学 | Double-layered casing windowing drillbit |
| CN104100202A (en) * | 2014-07-07 | 2014-10-15 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Starting valve for controlling orientation anchoring of whipstock |
| US20160237770A1 (en) * | 2015-02-18 | 2016-08-18 | Weatherford Technology Holdings, Llc | Cutting tool |
| CN105649564A (en) * | 2016-03-31 | 2016-06-08 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Tool string for one-drill-trip window sidetrack drilling of open-hole horizontal well and technological method |
| CN108240217A (en) * | 2016-12-26 | 2018-07-03 | 中国石油天然气股份有限公司 | A kind of test plunger to recover the oil for plunger lift and test system |
| CN106988699A (en) * | 2017-05-10 | 2017-07-28 | 中国海洋石油总公司 | An a kind of formula side-drilling windowing milling cone instrument |
| CN107100574A (en) * | 2017-05-10 | 2017-08-29 | 中国海洋石油总公司 | A kind of integral type sidetracking window opening tool assembly |
| CN108104753A (en) * | 2017-12-18 | 2018-06-01 | 海林新科石油耐磨工具有限责任公司 | Integrated high-efficiency sidetrack drilling tool |
| CN208885235U (en) * | 2018-09-28 | 2019-05-21 | 中石化石油工程技术服务有限公司 | A kind of horizontal well drag fracturing tubing string and its tail end packer |
| CN209308635U (en) * | 2019-01-14 | 2019-08-27 | 成都百施特金刚石钻头有限公司 | PDC drill bit with multiple stage crushing function |
| CN110748313A (en) * | 2019-10-28 | 2020-02-04 | 锦州清华机械有限公司 | Wireless self-orienting hydraulic integrated windowing sidetrack drilling tool |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112282685A (en) * | 2020-11-11 | 2021-01-29 | 北京佰文恒新能源服务有限公司 | Multistage outer diameter windowing mill shoe for multiple thick-wall pipes |
| CN112282685B (en) * | 2020-11-11 | 2021-09-24 | 北京佰文恒新能源服务有限公司 | Multistage outer diameter windowing mill shoe for multiple thick-wall pipes |
| 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 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201009 |
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| RJ01 | Rejection of invention patent application after publication |