CN103775014A - Grinding shoe used for grinding and milling under the shaft of oil field and manufacturing method thereof - Google Patents

Grinding shoe used for grinding and milling under the shaft of oil field and manufacturing method thereof Download PDF

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Publication number
CN103775014A
CN103775014A CN201210542192.XA CN201210542192A CN103775014A CN 103775014 A CN103775014 A CN 103775014A CN 201210542192 A CN201210542192 A CN 201210542192A CN 103775014 A CN103775014 A CN 103775014A
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China
Prior art keywords
junk mill
group
mill body
oil field
grinding
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Granted
Application number
CN201210542192.XA
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Chinese (zh)
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CN103775014B (en
Inventor
张亚昌
王辉
赵新学
沈赤卫
鄢红江
陈文萍
王文
补声军
杨庭华
杨杰
张永维
陈云兵
王观礼
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Guizhou Gaofeng Petroleum Machinery Co Ltd
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Guizhou Gaofeng Petroleum Machinery Co Ltd
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Priority to CN201210542192.XA priority Critical patent/CN103775014B/en
Publication of CN103775014A publication Critical patent/CN103775014A/en
Application granted granted Critical
Publication of CN103775014B publication Critical patent/CN103775014B/en
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Abstract

The invention discloses a grinding shoe used for grinding and milling under the shaft of an oil field and a manufacturing method of the grinding shoe. The grinding shoe comprises a grinding shoe body, a hard alloy column is fixed to the bottom of the grinding shoe body, the grinding shoe body is manufactured in a cylinder shape, a set of centralizers with roll balls is evenly distributed on the cylinder surface of the grinding shoe body in the circumferential direction, and the roll balls of the centralizers with the roll balls can roll; meanwhile, a set of T-shaped grooves is evenly distributed on the cylinder surface of the grinding shoe body in the circumferential direction, and a T-shaped cutting blade is installed in each T-shaped groove. The grinding shoe is free of eccentric abrasion at work, and the frictional resistance between the grinding shoe and a casing wall is small. The T-shaped cutting blades are matched with the T-shaped grooves in the grinding shoe body, so that the blades do not fall off; the angle alpha is formed on the rear blade face of each T-shaped cutting blade, and the angle beta is formed on the front blade face of each T-shaped cutting blade, so that rapid chip breaking is achieved in the grinding and milling process, and scrap iron can be rapidly washed away by mud; because a groove is formed in each T-shaped cutting blade, when the cutting edge of one blade is broken, the blade will not fracture wholly.

Description

A kind of junk mill and preparation method thereof for oil field well milling
Technical field
the present invention relates to a kind of oil field well milling junk mill and preparation method thereof, belong to down-hole milling tool technical field.
Background technology
in the middle and later periods of oilfield exploitation, because oil well is more and more darker, in drilling process, often there will be drilling rod or other instrument to fall into the accident of down-hole.This just need to use milling tool to carry out grinding to trouble of lost tool in hole, and then junk is pulled out from down-hole.
the flat-bottom grind shoes that oil field is used is at present in the time of grinding trouble of lost tool in hole, owing to going out, few, the effective length of cut of sword is short, milling efficiency is low, and there will be the excessive wear of junk mill center, form dell even junk mill heart portion emptied, or the hard alloy particle of the junk mill surface overlaying bald light of being all struck off, causes junk mill to lose efficacy in advance, junk mill surface attachment mud layer, the non-normal use phenomenon of formation mud drum.
Summary of the invention
the object of the invention is to, a kind of oil field well milling junk mill and preparation method thereof is provided, to improve milling speed, reduce flat-bottom grind shoes self wear extent, thereby overcome the deficiency that existing junk mill exists.
technical scheme of the present invention is achieved in that the preparation method of a kind of oil field well milling junk mill of the present invention is, the method comprises junk mill body, bottom at junk mill body is fixed with hard alloy columnar, junk mill body is made into cylindrical shape, and the one group of band ball centralizer that is uniformly distributed along the circumference on the periphery of junk mill body, and make can roll with the ball on ball centralizer, the one group of T-slot that is simultaneously uniformly distributed along the circumference on the periphery of junk mill body is installed respectively T shape cutting tip in each T-slot.
in above-mentioned one group of band ball centralizer, the contained quantity with ball centralizer is 3~6, and between every two band ball centralizers, all produces respectively a T-slot on junk mill body.
the of the present invention a kind of oil field well milling junk mill building according to said method is: this junk mill comprises junk mill body, and junk mill body is cylinder, and the cylindrical of junk mill body is provided with the one group of band ball centralizer being uniformly distributed along the circumference, one group of flow path groove and one group of T-slot; One group of flow path groove is communicated with the intrinsic one group of hydrophthalmia hole of junk mill; In T-slot, be respectively equipped with T shape cutting tip; The bottom surface of junk mill body is evenly equipped with one group of hard alloy columnar.
in aforementioned efficient flat-bottom grind shoes, the bottom surface of described junk mill body is plane, on bottom surface surfacing one deck hard alloy particle.
in aforementioned efficient flat-bottom grind shoes, described T shape cutting tip is provided with one group of groove.
in aforementioned efficient flat-bottom grind shoes, described T shape cutting tip is provided with anterior angle β and relief angle α, and anterior angle β angle is 8 °, and relief angle α angle is 15 °.
in aforementioned efficient flat-bottom grind shoes, described one group of hard alloy columnar is pressed spiral of Archimedes arrangement mode and is arranged.
in aforementioned efficient flat-bottom grind shoes, described hard alloy columnar is hexagonal prism.
in aforementioned efficient flat-bottom grind shoes, described band ball centralizer comprises wiper block, and wiper block, in adjustment screw is arranged on the groove of junk mill body, is provided with spring in groove; Wiper block is provided with ball recess, is provided with ball in ball recess, and wiper block is provided with pressing plate, and pressing plate is provided with the circular hole corresponding with ball, and pressing plate is connected with wiper block through bolt.
owing to having adopted technique scheme, the junk mill with ball centralizer of the present invention can not grind partially in the time of work, and little with casing wall frictional resistance.T shape cutting tip of the present invention coordinates with on T-slot on junk mill body, and in milling operation, blade can not drop; After T shape cutting tip, knife face has formed a α angle and T shape cutting tip rake face has formed a β angle, chip breaking rapidly in milling process, and mud can wash away iron filings rapidly; On T shape cutting tip, have several grooves, owing to there being several grooves, in the time that blade collapses tooth, blade can wholely not rupture.So compared with prior art, the present invention not only has advantages of can effectively improve milling speed, reduce flat-bottom grind shoes self wear extent, but also has long service life, good operating stability, operating efficiency advantages of higher in the present invention.
Accompanying drawing explanation
fig. 1 is structural representation of the present invention;
fig. 2 is T shape cutting tip front-and-back angle schematic diagram;
fig. 3 is the structural representation of ball centralizer.
being labeled as in figure: 1-junk mill body, 2-band ball centralizer, 3-flow path groove, 4-T shape groove, 5-hydrophthalmia hole, 6-T shape cutting tip, 7-hard alloy columnar, 8-hard alloy particle, 9-groove, 10-wiper block, 11-adjustment screw, 12-spring, 13-ball, 14-pressing plate.
The specific embodiment
below in conjunction with accompanying drawing, the present invention is described in further detail, but not as any limitation of the invention.
embodiments of the invention: a kind of oil field well milling of the present invention can be implemented by the preparation method of junk mill on the basis of existing making junk mill, the method comprises junk mill body 1, when making, junk mill body 1 is made into cylindrical shape, fix in a traditional way hard alloy columnar 7 in the bottom of junk mill body 1, and the one group of band ball centralizer 2 that is uniformly distributed along the circumference on the periphery of junk mill body 1, and make can roll with the ball on ball centralizer 2, one group of T-slot 4 is uniformly distributed along the circumference simultaneously on the periphery of junk mill body 1, in each T-slot 4, install respectively T shape cutting tip 6, this T shape cutting tip 6 can adopt the production method of existing carbide chip to make, in one group band ball centralizer 2, the contained quantity with ball centralizer 2 is 3~6, and between every two band ball centralizers 2, all produces respectively a T-slot 4 on junk mill body 1.
the of the present invention a kind of oil field well milling junk mill building according to said method, the structural representation of this junk mill as shown in FIG. 1 to 3, comprise junk mill body 1, junk mill body 1 is cylinder, and the cylindrical of junk mill body 1 is provided with the one group of band ball centralizer 2 being uniformly distributed along the circumference, one group of flow path groove 3 and one group of T-slot 4; One group of flow path groove 3 is communicated with one group of hydrophthalmia hole 5 in junk mill body 1; In T-slot 4, be respectively equipped with T shape cutting tip 6; The bottom surface of junk mill body 1 is evenly equipped with one group of hard alloy columnar 7; The bottom surface of junk mill body 1 is plane, on bottom surface surfacing one deck hard alloy particle 8.T shape cutting tip 5 is provided with one group of groove 9.T shape cutting tip 5 is provided with anterior angle β and relief angle α, and anterior angle β angle is 8 °, and relief angle α angle is 15 °; One group of hard alloy columnar 7 is pressed spiral of Archimedes arrangement mode and is arranged.Hard alloy columnar 7 is hexagonal prism (Fig. 1 is schematic diagram, in order to draw conveniently, is not drawn as hexagonal prism).Band ball centralizer 2 comprises wiper block 10, and wiper block 10, in adjustment screw 11 is arranged on the groove of junk mill body 1, is provided with spring 12 in groove; Wiper block 10 is provided with ball recess, is provided with ball 13 in ball recess, and wiper block 10 is provided with pressing plate 14, and pressing plate 14 is provided with the circular hole corresponding with ball 13, and pressing plate 14 is connected with wiper block 10 through bolt.
below the course of work of the present invention and principle are further described:
because junk mill body 1 cylindrical of the present invention is provided with the one group of band ball centralizer 2 being uniformly distributed along the circumference, thus go into the well in process, ball 13 inward collapsibles, instrument external diameter diminishes, and is convenient to pass through.Pressurization is when milling, and ball 13 is outwards opened by the elastic force of spring 12, and enlarged-diameter is close on internal surface of sleeve pipe, has not only revolved round the sun but also rotation, has guaranteed the centering of flat-bottom grind shoes, has improved milling efficiency.
because flow path groove 3 is connected with 3 hydrophthalmia holes 5 on junk mill body 1, so the iron filings of milling can be taken away rapidly, the sole face of can not regrinding stops and formation mud cake again.
on junk mill body 1, have 3 T-slots 4,4 li of T-slots are equipped with T shape cutting tip 6, due to this special cooperation, in milling process, blade can not drop easily, though common junk mill has the still blade of blade not fix, do not grind how long blade just drops, do not play the effect that improves stock-removing efficiency.After T shape cutting tip, knife face has formed a α angle and T shape cutting tip rake face has formed a β angle, and the angle at α angle is 15 °, and the angle at β angle is 8 °, has played the effect that fast quick-break is cut.
owing to there being several grooves 9 on T shape cutting tip 6, so in the time that a blade has a place to collapse tooth, can not involve other place on a blade and collapse tooth.
on the bottom surface of flat-bottom grind shoes, be also inlaid with several hard alloy columnars 7, hard alloy columnar 7 is six prisms, grinding gets up quite to have more blade to participate in grinding, and arranging of a hard alloy columnar 7 be that spiral of Archimedes is arranged, and milling gets up to have covered whole milling face.
the present invention is made up of jointly hard alloy particle milling sword, secondary T shape cutting tip cutting edge and three hard alloy columnar milling swords.One time milling sword is equivalent to put down (recessed) face junk mill, and secondary cutting sword is equivalent to scraper cutting, and three milling swords are equivalent to Archimedes's junk mill of arranging.When milling sharpening milling is for the first time deepened gradually, after milling sharpening falls, cutting edge starts cutting for the second time, starts milling followed by milling sword for the third time, for the second time cutting edge and for the third time two milling swords of milling sword start synchronous milling, raising milling efficiency.

Claims (9)

1. the preparation method of an oil field well milling use junk mill, comprise junk mill body (1), be fixed with hard alloy columnar (7) in the bottom of junk mill body (1), it is characterized in that: junk mill body (1) is made into cylindrical shape, and the one group of band ball centralizer (2) that is uniformly distributed along the circumference on the periphery of junk mill body (1), and make can roll with the ball on ball centralizer (2), one group of T-slot (4) is uniformly distributed along the circumference simultaneously on the periphery of junk mill body (1), in each T-slot (4), install respectively T shape cutting tip (6).
2. the preparation method of junk mill for oil field well milling according to claim 1, it is characterized in that: in one group of band ball centralizer (2), the quantity of contained band ball centralizer (2) is 3~6, and all produce respectively a T-slot (4) between upper every two the band ball centralizers of junk mill body (1) (2).
3. an oil field well milling junk mill, comprise junk mill body (1), it is characterized in that: junk mill body (1) is cylinder, and the cylindrical of junk mill body (1) is provided with the one group of band ball centralizer (2), one group of flow path groove (3) and the one group of T-slot (4) that are uniformly distributed along the circumference; One group of flow path groove (3) is communicated with the one group of hydrophthalmia hole (5) in junk mill body (1); In T-slot (4), be respectively equipped with T shape cutting tip (6); The bottom surface of junk mill body (1) is evenly equipped with one group of hard alloy columnar (7).
4. oil field well milling junk mill according to claim 3, is characterized in that: the bottom surface of described junk mill body (1) is plane, on bottom surface surfacing one deck hard alloy particle (8).
5. oil field well milling junk mill according to claim 3, is characterized in that: described T shape cutting tip (6) is provided with one group of groove (9).
6. oil field well milling junk mill according to claim 3, is characterized in that: described T shape cutting tip (6) is provided with anterior angle β and relief angle α, anterior angle β angle is 8 °, and relief angle α angle is 15 °.
7. oil field well milling junk mill according to claim 3, is characterized in that: described one group of hard alloy columnar (7) is arranged by spiral of Archimedes arrangement mode.
8. oil field well milling junk mill according to claim 3, is characterized in that: described hard alloy columnar (7) is hexagonal prism.
9. oil field well milling junk mill according to claim 3, it is characterized in that: described band ball centralizer (2) comprises wiper block (10), wiper block (10) is arranged in the groove of junk mill body (1) through adjustment screw (11), is provided with spring (12) in groove; Wiper block (10) is provided with ball recess, is provided with ball (13) in ball recess, and wiper block (10) is provided with pressing plate (14), and pressing plate (14) is provided with the circular hole corresponding with ball (13), and pressing plate (14) is connected with wiper block (10) through bolt.
CN201210542192.XA 2012-12-14 2012-12-14 A kind of oil field well milling junk mill Active CN103775014B (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109296329A (en) * 2018-11-29 2019-02-01 四川圣诺油气工程技术服务有限公司 A kind of big orifice junk mill device
CN110984895A (en) * 2019-11-27 2020-04-10 淮安市井神钻采机具有限公司 High-efficiency composite milling tool

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2349344Y (en) * 1998-04-24 1999-11-17 中国通化石油工具股份有限公司 High-efficient grind shoe
CA2534876A1 (en) * 1999-04-16 2000-10-26 Schlumberger Technology Corporation Downhole deflecting tool with attached mill
CN2916110Y (en) * 2006-05-23 2007-06-27 辽河石油勘探局 Eccentric wear preventing grind shoe
CN201386523Y (en) * 2009-04-14 2010-01-20 中国石化集团胜利石油管理局钻井工艺研究院 Efficient drilling, grinding and milling integrated tool for well completion of horizontal well
CN201401142Y (en) * 2008-12-12 2010-02-10 中国石油集团长城钻探工程有限公司 Horizontal well high-efficiency composite mill shoe
CN201891393U (en) * 2010-12-17 2011-07-06 中国石油天然气集团公司 Eccentric wear prevention ball centralizer
CN202451093U (en) * 2012-02-02 2012-09-26 中国石油化工股份有限公司 Centering type milling shoe
CN203022670U (en) * 2012-12-14 2013-06-26 贵州高峰石油机械股份有限公司 Efficient flat-bottom grinding shoe with ball centralizers and blades

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2349344Y (en) * 1998-04-24 1999-11-17 中国通化石油工具股份有限公司 High-efficient grind shoe
CA2534876A1 (en) * 1999-04-16 2000-10-26 Schlumberger Technology Corporation Downhole deflecting tool with attached mill
CN2916110Y (en) * 2006-05-23 2007-06-27 辽河石油勘探局 Eccentric wear preventing grind shoe
CN201401142Y (en) * 2008-12-12 2010-02-10 中国石油集团长城钻探工程有限公司 Horizontal well high-efficiency composite mill shoe
CN201386523Y (en) * 2009-04-14 2010-01-20 中国石化集团胜利石油管理局钻井工艺研究院 Efficient drilling, grinding and milling integrated tool for well completion of horizontal well
CN201891393U (en) * 2010-12-17 2011-07-06 中国石油天然气集团公司 Eccentric wear prevention ball centralizer
CN202451093U (en) * 2012-02-02 2012-09-26 中国石油化工股份有限公司 Centering type milling shoe
CN203022670U (en) * 2012-12-14 2013-06-26 贵州高峰石油机械股份有限公司 Efficient flat-bottom grinding shoe with ball centralizers and blades

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109296329A (en) * 2018-11-29 2019-02-01 四川圣诺油气工程技术服务有限公司 A kind of big orifice junk mill device
CN109296329B (en) * 2018-11-29 2020-08-07 四川圣诺油气工程技术服务有限公司 Large-drift-diameter shoe grinding device
CN110984895A (en) * 2019-11-27 2020-04-10 淮安市井神钻采机具有限公司 High-efficiency composite milling tool

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