CN119321291B - Tapered front guide grinding shoe for eccentric wear prevention sleeve - Google Patents
Tapered front guide grinding shoe for eccentric wear prevention sleeveInfo
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- CN119321291B CN119321291B CN202411499912.8A CN202411499912A CN119321291B CN 119321291 B CN119321291 B CN 119321291B CN 202411499912 A CN202411499912 A CN 202411499912A CN 119321291 B CN119321291 B CN 119321291B
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Abstract
The invention discloses an anti-eccentric sleeve conical front-mounted guide grinding shoe, which comprises a grinding shoe joint, a conical grinding shoe mechanism arranged below the grinding shoe joint, and a conical guide post arranged below the conical grinding shoe mechanism, wherein the conical grinding shoe mechanism comprises a grinding shoe body and a hard alloy layer arranged outside the grinding shoe body, a grinding surface is arranged outside the hard alloy layer, a water passage is vertically arranged in the grinding shoe joint, a plurality of water eye openings are formed in the bottom of the water passage, each water eye opening is communicated with a first grinding shoe water eye obliquely arranged in the grinding shoe body, each first grinding shoe water eye is communicated with a second grinding shoe water eye obliquely arranged in the hard alloy layer, and the first grinding shoe water eye and the second grinding shoe water eye are coaxial in equal diameter. The invention can continuously and efficiently mill and protect the inner wall of the sleeve, and can effectively prevent the inner wall of the sleeve from being damaged due to eccentric wear in the milling process.
Description
Technical Field
The invention belongs to the technical field of well repairing tools for middle-deep geothermal development, and particularly relates to a tapered front guide grinding shoe for an anti-eccentric sleeve.
Background
With the increasing technical level of middle-deep geothermal energy development and oil-gas field development, well structures are also increasingly complex, horizontal well structures become advanced well structures of efficient development middle-deep geothermal energy and oil-gas resources, at present, when a drill rod is broken and stuck in a horizontal well casing and a fish is required to be ground and milled, due to the self structure of a grinding shoe, the grinding shoe suitable for an open hole well is extremely easy to be ground in a bias way, the casing wall and even a waste well are damaged, so the grinding shoe suitable for the open hole well is not suitable for the casing, and difficulty is brought to well repairing operation. To solve the above problems, in the prior art, balls are arranged in grooves of a grinding shoe matrix to achieve the purpose of preventing eccentric wear, but because the bottoms of the grinding shoe heads are still exposed and lack of a righting device, the possibility that the balls encounter a card to eccentrically wear the casing wall is extremely high in the use process, and particularly when the thickness and the diameter of a fish are unevenly distributed, the adoption of the device can lead to the deviation of the grinding shoe in the milling process, and finally the casing wall is worn, so that improvement is needed.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a tapered front guide grinding shoe for an anti-eccentric sleeve, which aims to solve the technical problem that the inner wall of the sleeve is damaged due to the deflection of the grinding shoe when a drill rod is grinded in the sleeve in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
The tapered preposed guiding grinding shoe for the anti-eccentric grinding sleeve comprises a grinding shoe joint, a tapered grinding shoe mechanism arranged below the grinding shoe joint, and a tapered guiding column arranged below the tapered grinding shoe mechanism, wherein the tapered grinding shoe mechanism comprises a grinding shoe body and a hard alloy layer arranged outside the grinding shoe body, a grinding surface is arranged outside the hard alloy layer, a water passage is vertically arranged in the grinding shoe joint, a plurality of water holes are formed in the bottom of the water passage, each water hole is communicated with a first grinding shoe water hole obliquely arranged in the grinding shoe body, each first grinding shoe water hole is communicated with a second grinding shoe water hole obliquely arranged in the hard alloy layer, and the first grinding shoe water holes and the second grinding shoe water holes are coaxial in equal diameter.
The invention also has the following technical characteristics:
specifically, the number of the first grinding shoe water holes and the second grinding shoe water holes is three, and the three first grinding shoe water holes are arranged at equal intervals along the circumference of the grinding shoe body.
Still further, the conical guide post bottom inlays and is equipped with righting and use the alloy post, the alloy post sets up to protruding in the bottom surface of conical guide post.
Further, the cemented carbide layer is an YD cemented carbide layer.
Further, the large diameter end of the conical shoe grinding mechanism is connected with the shoe grinding joint, the small diameter end of the conical shoe grinding mechanism is connected with the conical guide post, and the maximum diameter of the conical shoe grinding mechanism is 140mm and the minimum diameter of the conical shoe grinding mechanism is 61.5mm.
Furthermore, the outer side of one end of the conical guide post, which is close to the conical shoe grinding mechanism, is sleeved with an anti-wear alloy belt.
Furthermore, a plurality of sleeve damage stopping copper belts are arranged at intervals outside the grinding shoe joint.
Furthermore, the included angle between the first grinding shoe water hole and the grinding shoe joint axis is 25-45 degrees, and the diameters of the first grinding shoe water hole and the second grinding shoe water hole are 12mm.
Compared with the prior art, the invention has the following technical effects:
(1) The tapered front guide grinding shoe of the eccentric wear-resistant sleeve can grind and mill deformed parts of the sleeve in the sleeve of a vertical well or a horizontal well section of a middle-deep geothermal well and an oil-gas well, and particularly, when the tapered grinding shoe mechanism and the tapered guide column are arranged in the sleeve to grind and mill a drill rod, the tapered front guide grinding shoe can continuously and efficiently grind and mill the inner wall of the sleeve and has a protective effect on the inner wall of the sleeve, and the inner wall of the sleeve can be effectively prevented from being damaged due to eccentric wear in the grinding and milling process.
(2) The invention has simple structure, small volume, high efficiency, strong adaptability, safety and reliability, and can effectively improve the milling efficiency, reduce the well repair cost and control the well repair risk.
Drawings
FIG. 1 is a schematic view of the overall structure of a tapered front guide shoe of an anti-bias wear sleeve of the present invention;
FIG. 2 is a bottom view of the anti-bias sleeve tapered front guide shoe of the present invention;
FIG. 3 is a schematic diagram of the operation of the tapered front guide shoe of the anti-bias sleeve of the present invention.
The reference numerals in the figures represent:
1-grind shoe joint, 2-taper grind shoe mechanism, 3-taper guide column, 4-alloy column, 5-wear-proof alloy belt, 6-sleeve wear-proof copper belt, 7-sleeve, 8-drill rod, 11-water channel, 21-grind shoe body, 22-hard alloy layer, 111-water hole, 211-first grind shoe water hole, 221-second grind shoe water hole.
Detailed Description
The following specific embodiments of the present application are provided, and it should be noted that the present application is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of the present application fall within the protection scope of the present application.
In describing the present invention in terms of orientations, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc. are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
All parts of the invention are commercially available unless otherwise specified.
Example 1
According to the technical scheme, as shown in fig. 1, the embodiment provides the eccentric wear prevention sleeve conical front guide grinding shoe, which comprises a grinding shoe joint 1, a conical grinding shoe mechanism 2 arranged below the grinding shoe joint 1, and a conical guide post 3 arranged below the conical grinding shoe mechanism 2, wherein the conical grinding shoe mechanism 2 comprises a grinding shoe body 21 and a hard alloy layer 22 arranged outside the grinding shoe body 21, a grinding surface is arranged outside the hard alloy layer 22, a water passage 11 is vertically arranged in the grinding shoe joint 1, a plurality of water eye openings 111 are formed in the bottom of the water passage 11, each water eye opening 111 is communicated with a first grinding shoe water eye 211 obliquely arranged in the grinding shoe body 21, each first grinding shoe water eye 211 is communicated with a second grinding shoe water eye 221 obliquely arranged in the hard alloy layer 22, and the first grinding shoe water eye 211 and the second grinding shoe water eye 221 are coaxial in equal diameter.
The total length of the conical front guide grinding shoe of the anti-eccentric sleeve used in the embodiment is 400mm, the total length of the conical grinding shoe mechanism 2 and the conical guide column 3 is 270mm, and the anti-eccentric sleeve is used for grinding and milling the broken drill rod in the 177.8mm x N80 sleeve. The size of the tapered front guide grinding shoe of the anti-eccentric sleeve can be selected according to the actual working condition requirement.
The shoe grinding joint 1 and the conical shoe grinding mechanism are made of high-strength alloy materials, and are of an integrated structure, so that the shoe grinding joint has very strong tensile strength and compressive strength, and the possibility of fracture of the joint in the milling process is avoided. The conical shoe grinding mechanism 2 can continuously grind under the drive of the rotary power of the milling pipe column in the milling process, and the conical design can effectively avoid abrasion of the side wall of the shoe grinding mechanism to the inner wall of the sleeve in the milling process.
The design of the conical guide post can prevent damage to the casing wall caused by eccentric wear during milling of the drill rod. The swarf generated by milling can be returned to the wellhead from the corresponding flow through grooves and annular spaces between the pipe string and casing by the milling fluid flowing out through the water holes 221.
As a preferable solution of this embodiment, the number of the first shoe eyes 211 and the second shoe eyes 221 is three, and the three first shoe eyes 211 are equally spaced along the circumference of the shoe body 21.
As a preferable solution of this embodiment, the bottom end of the conical guide post 3 is embedded with a righting alloy post 4, and the alloy post 4 is set to protrude from the bottom surface of the conical guide post 3. The alloy column 4 plays a role in guiding and righting in the process of milling the drill rod, and the phenomenon that the guiding grinding shoes wear out the inner wall of the sleeve in the process of milling the drill rod is avoided.
As a preferable mode of this embodiment, the cemented carbide layer 22 is an YD cemented carbide layer having the characteristics of high hardness, high strength, high wear resistance and high corrosion resistance.
As a preferable scheme of the embodiment, the large diameter end of the conical grinding shoe mechanism 2 is connected with the grinding shoe joint 1, the small diameter end of the conical grinding shoe mechanism 2 is connected with the conical guide post 3, and the maximum diameter of the conical grinding shoe mechanism 2 is 140mm and the minimum diameter is 61.5mm.
As a preferable scheme of the embodiment, an anti-wear alloy belt 5 is sleeved outside one end of the conical guide post 3, which is close to the conical shoe grinding mechanism 2, and the anti-wear alloy belt 5 is made of YD hard alloy and is used for protecting the joint of the conical guide post 3 and the hard alloy layer 22 and preventing damage deformation in the grinding and milling process.
As a preferable scheme of the embodiment, a plurality of sleeve damage stopping copper strips 6 are arranged at intervals outside the grinding shoe joint 1. In this embodiment, the length of the damage-stopping copper belt 6 is 10mm, the thickness is 5mm, and the arrangement interval is 50mm, so as to prevent the abrasion of the inner wall of the sleeve by the grinding shoe joint 1.
As a preferable scheme of this embodiment, the included angle between the first grinding eyelet 211 and the axis of the grinding joint 1 is 25-45 °, and the diameters of the first grinding eyelet 211 and the second grinding eyelet 221 are 12mm.
The application process of the invention is as follows:
(1) Starting a power system, connecting the tapered front guide grinding shoes of the eccentric wear-resistant sleeve to the bottom end of a grinding and milling pipe column through threads, lowering the pipe column to a position 5-8 meters above a broken drill rod in the sleeve, starting a circulating pump to circulate grinding and milling liquid, enabling the grinding and milling liquid to flow out through a water channel 11, a first grinding shoe water hole 211 and a second grinding shoe water hole 221, and finally returning to a wellhead through an annular space between a tapered grinding shoe mechanism and the sleeve;
(2) Rotating the milling pipe column and driving the conical front guide milling shoe of the lower anti-eccentric sleeve to slowly enter the conical guide column 3 into the central channel of the broken drill rod;
(3) And slowly lowering the milling pipe column, and when the milling bit pressure of the anti-eccentric sleeve conical front guide milling shoe is reached, starting to grind the drill rod by the hard alloy layer.
(4) When milling of the broken drill rod in the sleeve is completed, the power system is closed, the tapered front guide milling shoe of the eccentric wear prevention sleeve stops rotating, the milling liquid circulating pump is closed, the tubular column is lifted to the wellhead, and the tapered front guide milling shoe of the eccentric wear prevention sleeve is dismounted.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The tapered front-mounted guide grinding shoe of the anti-eccentric grinding sleeve comprises a grinding shoe joint (1) and is characterized by further comprising a tapered grinding shoe mechanism (2) arranged below the grinding shoe joint (1) and tapered guide posts (3) arranged below the tapered grinding shoe mechanism (2), wherein the tapered grinding shoe mechanism (2) comprises a grinding shoe body (21) and a hard alloy layer (22) arranged outside the grinding shoe body (21), a grinding surface is arranged outside the hard alloy layer (22), a water channel (11) is vertically arranged in the grinding shoe joint (1), a plurality of water eye openings (111) are formed in the bottom of the water channel (11), each water eye opening (111) is communicated with a first grinding shoe water eye (211) obliquely arranged in the grinding shoe body (21), and each first grinding shoe water eye (211) is communicated with a second grinding shoe water eye (221) obliquely arranged in the hard alloy layer (22);
An alloy column (4) for centralizing is embedded at the bottom end of the conical guide column (3), and the alloy column (4) is arranged to protrude out of the bottom surface of the conical guide column (3);
An anti-wear alloy belt (5) is sleeved outside one end of the conical guide column (3) close to the conical shoe grinding mechanism (2);
A plurality of sleeve damage stopping copper strips (6) are arranged at intervals outside the grinding shoe joint (1).
2. The tapered front guide shoe of the eccentric wear prevention sleeve according to claim 1, wherein the number of the first shoe water holes (211) and the second shoe water holes (221) is three, and the three first shoe water holes (211) are arranged at equal intervals along the circumferential direction of the shoe body (21).
3. The anti-bias sleeve tapered front guide shoe of claim 1, wherein the cemented carbide layer (22) is a YD cemented carbide layer.
4. The eccentric wear prevention sleeve tapered front guide shoe according to claim 1, wherein the large diameter end of the tapered shoe mechanism (2) is connected with the shoe joint (1), the small diameter end of the tapered shoe mechanism (2) is connected with the tapered guide post (3), and the maximum diameter of the tapered shoe mechanism (2) is 140mm, and the minimum diameter is 61.5mm.
5. The eccentric wear prevention sleeve conical front guide mill shoe according to claim 1, wherein an included angle between the first mill shoe water hole (211) and the axis of the mill shoe joint (1) is 25-45 degrees, and the diameters of the first mill shoe water hole (211) and the second mill shoe water hole (221) are 12mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411499912.8A CN119321291B (en) | 2024-10-25 | 2024-10-25 | Tapered front guide grinding shoe for eccentric wear prevention sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411499912.8A CN119321291B (en) | 2024-10-25 | 2024-10-25 | Tapered front guide grinding shoe for eccentric wear prevention sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN119321291A CN119321291A (en) | 2025-01-17 |
| CN119321291B true CN119321291B (en) | 2025-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202411499912.8A Active CN119321291B (en) | 2024-10-25 | 2024-10-25 | Tapered front guide grinding shoe for eccentric wear prevention sleeve |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996013968A2 (en) * | 1994-10-28 | 1996-05-17 | I.N. Frantsevich Institute For Problems Of Materials Science | Cutting insert for a cutting tool |
| CN104912479A (en) * | 2015-04-30 | 2015-09-16 | 中煤科工集团西安研究院有限公司 | Method for drilling and completion of horizontal branched well for coal bed gas |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7370702B2 (en) * | 2004-01-08 | 2008-05-13 | Baker Hughes Incorporated | Single mill casing window cutting tool and method |
| CN101555775B (en) * | 2009-04-24 | 2013-01-30 | 东营北方石油装备有限公司 | Pilot milling cone tool for repairing casing and method thereof |
| CN204729053U (en) * | 2015-06-12 | 2015-10-28 | 西南石油大学 | A kind of single deck tape-recorder watt double acting speed bores composite bridge plug |
| CN204960854U (en) * | 2015-09-22 | 2016-01-13 | 中国石油集团川庆钻探工程有限公司 | Milling cones for coiled tubing milling |
| US11371337B2 (en) * | 2017-05-19 | 2022-06-28 | Wellbore Specialties, Llc | Liner top test tool |
| CN208330247U (en) * | 2018-05-23 | 2019-01-04 | 中国石油天然气股份有限公司 | grinding shoes |
| CN209924956U (en) * | 2018-09-20 | 2020-01-10 | 四川中宏瑞石油机械工程有限公司 | A shoe grinding structure with grinding and milling teeth on the bottom surface |
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2024
- 2024-10-25 CN CN202411499912.8A patent/CN119321291B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996013968A2 (en) * | 1994-10-28 | 1996-05-17 | I.N. Frantsevich Institute For Problems Of Materials Science | Cutting insert for a cutting tool |
| CN104912479A (en) * | 2015-04-30 | 2015-09-16 | 中煤科工集团西安研究院有限公司 | Method for drilling and completion of horizontal branched well for coal bed gas |
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| Publication number | Publication date |
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| CN119321291A (en) | 2025-01-17 |
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