CN103775014B - A kind of oil field well milling junk mill - Google Patents
A kind of oil field well milling junk mill Download PDFInfo
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- CN103775014B CN103775014B CN201210542192.XA CN201210542192A CN103775014B CN 103775014 B CN103775014 B CN 103775014B CN 201210542192 A CN201210542192 A CN 201210542192A CN 103775014 B CN103775014 B CN 103775014B
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- junk mill
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Abstract
The invention discloses a kind of oil field well milling junk mill, including junk mill body, hard alloy columnar is fixed with the bottom of junk mill body, junk mill body is fabricated to 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 enable to be rolled with the ball on ball centralizer, while the one group of T-slot that is uniformly distributed along the circumference on the periphery of junk mill body, is respectively mounted T-shaped cutting tip in each T-slot.The present invention works together will not grind partially, small with casing wall frictional resistance.Coordinate on T-slot on T-shaped cutting tip and junk mill body, blade does not fall out；Knife face forms a α angle and T-shaped cutting tip rake face forms a β angle after T-shaped cutting tip, during milling can rapidly chip breaking, mud can rapidly wash away iron filings；T-shaped cutting tip is provided with one group of groove, and when blade collapses tooth, blade will not entirely be broken.
Description
Technical field
The present invention relates to a kind of oil field well milling junk mill and preparation method thereof, belong to underground milling tool technology neck
Domain.
Background technology
In the middle and later periods of oilfield exploitation, because oil well is more and more deeper, often occur in drilling process drilling rod or other
Instrument falls into the accident of underground.This is accomplished by being ground trouble of lost tool in hole using milling tool, then again by junk from underground
Pull out.
, when trouble of lost tool in hole is ground, due to going out, sword is few, effective length of cut is short, milling for the flat-bottom grind shoes that current oil field uses
Efficiency is low, and the excessive wear of junk mill center occurs, forms dell even junk mill center portion and is emptied, or junk mill surface overlaying
Hard alloy particle be all struck off bald light, cause junk mill premature failure, junk mill surface attachment mud layer to form the anon-normal of mud drum
Often use phenomenon.
The content of the invention
It is an object of the present invention to provide a kind of oil field well milling junk mill and preparation method thereof, to improve milling speed
Degree, reduces flat-bottom grind shoes itself wear extent, so as to overcome the shortcomings of that existing junk mill is present.
The technical proposal of the invention is realized in this way：A kind of preparation method of oil field well milling junk mill of the invention
For the method includes junk mill body, and hard alloy columnar is fixed with the bottom of junk mill body, and junk mill body is fabricated into cylinder
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 on band ball centralizer
Ball can roll, while the one group of T-slot that is uniformly distributed along the circumference on the periphery of junk mill body, in each T-slot
All it is respectively mounted T-shaped cutting tip.
Above-mentioned one group is 3~6 with the quantity with ball centralizer contained in ball centralizer, and in junk mill sheet
A T-slot is all produced respectively between each two band ball centralizer on body.
It is with junk mill according to of the invention a kind of oil field well milling that the above method builds：The junk mill includes junk mill sheet
Body, junk mill body is cylinder, and the cylindrical of junk mill body is provided with one group of band ball centralizer, one group of flow path groove being uniformly distributed along the circumference
With one group of T-slot；One group of flow path groove one group of hydrophthalmia hole intrinsic with junk mill connects；T-shaped bite is respectively equipped with T-slot
Piece；The bottom surface of junk mill body is evenly equipped with one group of hard alloy columnar.
In foregoing efficient flat-bottom grind shoes, the bottom surface of the junk mill body is plane, one layer of hard alloy of surfacing on bottom surface
Particle.
In foregoing efficient flat-bottom grind shoes, the T-shaped cutting tip is provided with one group of groove.
In foregoing efficient flat-bottom grind shoes, the T-shaped cutting tip is provided with preceding angle beta and relief angle α, and preceding angle beta angle is 8 °, relief angle
α angles are 15 °.
In foregoing efficient flat-bottom grind shoes, one group of hard alloy columnar presses spiral of Archimedes arrangement mode arrangement.
In foregoing efficient flat-bottom grind shoes, the hard alloy columnar is hexagonal prism.
In foregoing efficient flat-bottom grind shoes, the band ball centralizer includes wiper block, and the adjusted screw of wiper block is arranged on
In the groove of junk mill body, spring is provided with groove；Wiper block is provided with ball recess, and ball, righting are provided with ball recess
Block is provided with pressing plate, and pressing plate is provided with circular hole corresponding with ball, and pressing plate is connected through bolt with wiper block.
By adopting the above-described technical solution, the junk mill with ball centralizer of the invention will not operationally grind partially,
And it is small with casing wall frictional resistance.T-shaped cutting tip of the invention is engaged with the T-slot on junk mill body, in milling operation
Middle blade does not fall out；Knife face forms a α angle and T-shaped cutting tip rake face forms a β after T-shaped cutting tip
Angle, during milling can rapidly chip breaking, mud can rapidly wash away iron filings；There are several ditches on T-shaped cutting tip
Groove, due to there is several grooves, when blade collapses tooth, blade will not entirely be broken.So, the present invention compared with prior art, this
Invention not only has the advantages that to effectively improve milling speed, reduces flat-bottom grind shoes itself wear extent, but also with using the longevity
The advantages of life length, good operating stability, high working efficiency.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is T-shaped cutting tip front-and-back angle schematic diagram；
Fig. 3 is the structural representation of ball centralizer.
Mark in figure for：1- junk mills body, 2- bands ball centralizer, 3- flow path grooves, 4-T shapes groove, 5- hydrophthalmias hole, 6-T
Shape cutting tip, 7- hard alloy columnars, 8- hard alloy particles, 9- grooves, 10- wiper blocks, 11- adjusting screws, 12- springs,
13- balls, 14- pressing plates.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, but not as any limitation of the invention.
Embodiments of the invention：A kind of preparation method of oil field well milling junk mill of the invention can be in existing making
Implemented on the basis of junk mill, the method includes junk mill body 1, during making, junk mill body 1 is fabricated into cylindrical shape,
Hard alloy columnar 7 is fixed in a traditional way in the bottom of junk mill body 1, and along circle on the periphery of junk mill body 1
Mono- group of band ball centralizer 2 of Zhou Junbu, and enable to be rolled with the ball on ball centralizer 2, while in the circle of junk mill body 1
Be uniformly distributed along the circumference one group of T-slot 4 in damaged surface, and T-shaped cutting tip 6 is respectively mounted in each T-slot 4, and the T-shaped is cut
Paring blade 6 can be made using the production method of existing carbide chip；One group is rolled with band contained in ball centralizer 2
The quantity of pearl centralizer 2 is 3~6, and is all produced respectively between each two band ball centralizer 2 on junk mill body 1
One T-slot 4.
According to of the invention a kind of oil field well milling junk mill that the above method builds, the structural representation of the junk mill is such as
Shown in Fig. 1~Fig. 3, including junk mill body 1, junk mill body 1 is cylinder, and the cylindrical of junk mill body 1 is provided with what is be uniformly distributed along the circumference
One group of band 2, one group of flow path groove 3 of ball centralizer and one group of T-slot 4；One group of hydrophthalmia in one group of flow path groove 3 and junk mill body 1
Hole 5 connects；T-shaped cutting tip 6 is respectively equipped with T-slot 4；The bottom surface of junk mill body 1 is evenly equipped with one group of hard alloy columnar 7；Mill
The bottom surface of shoes body 1 is plane, one layer of hard alloy particle 8 of surfacing on bottom surface.T-shaped cutting tip 5 is provided with one group of groove
9.T-shaped cutting tip 5 is provided with preceding angle beta and relief angle α, and preceding angle beta angle is 8 °, and relief angle α angles are 15 °；One group of hard alloy columnar 7 is pressed
Spiral of Archimedes arrangement mode is arranged.Hard alloy columnar 7 is that (Fig. 1 is schematic diagram to hexagonal prism, in order to draw conveniently, not
It is drawn as hexagonal prism).Band ball centralizer 2 includes wiper block 10, and the adjusted screw 11 of wiper block 10 is arranged on junk mill body 1
Spring 12 is provided with groove, in groove；Wiper block 10 is provided with ball recess, and ball 13, wiper block 10 are provided with ball recess
Pressing plate 14 is provided with, pressing plate 14 is provided with and is connected with wiper block 10 through bolt with the corresponding circular hole of ball 13, pressing plate 14.
The course of work of the invention and principle are further described below：
Be uniformly distributed along the circumference one group of band ball centralizer 2 is provided with because junk mill body 1 of the invention is cylindrical, so going into the well
Cheng Zhong, ball 13 inwardly draws in, and tool external diameter diminishes, is easy to pass through.During pressurization milling, ball 13 is outside by the elastic force of spring 12
Open, enlarged-diameter is close on internal surface of sleeve pipe, not only revolved round the sun but also rotation, it is ensured that the centering of flat-bottom grind shoes, improve milling
Efficiency.
Again due to 3 hydrophthalmia holes 5 on flow path groove 3 and junk mill body 1 be connected to it is logical, so the iron filings of milling can be with fast
Fast takes away, and the sole face that will not regrind stops and forms mud cake.
3 T-slots 4 are provided with junk mill body 1, T-shaped cutting tip 6 is housed in T-slot 4, due to this special cooperation,
Blade will not easily drop during milling, though the blade that common junk mill has blade is not fixed, do not grind how long knife
Piece just drops, and does not play a part of to improve stock-removing efficiency.Knife face forms a α angle and T-shaped bite after T-shaped cutting tip
Piece rake face forms a β angle, and the angle at α angles is 15 °, and the angle at β angles is 8 °, serves the effect that fast quick-break is cut.
Due to having several grooves 9 on T-shaped cutting tip 6, so when a blade has a place to collapse tooth, will not involve
Other places collapse tooth on one blade.
Several hard alloy columnars 7 are also inlaid with the bottom surface of flat-bottom grind shoes, hard alloy columnar 7 is six prisms, and grinding is got up
Quite there are more blades to participate in grinding, and the arrangement of hard alloy columnar 7 is spiral of Archimedes arrangement, milling gets up to cover
Whole milling face.
The present invention is by hard alloy particle milling sword, secondary T-shaped cutting tip cutting edge and three hard alloy
Post milling sword is collectively constituted.Milling sword cuts equivalent to flat (recessed) face junk mill, secondary cutting sword equivalent to scraper, No. three mills
Milling sword is equivalent to Archimedes's arrangement junk mill.When first time milling sharpening milling is gradually deepened, milling sharpening cuts for the second time after falling
Sword starts cutting, and followed by third time milling sword starts milling, and two milling swords of the second minor cutting edge and third time milling sword are opened
Beginning synchronous milling, improves milling efficiency.
Claims (6)
1. a kind of oil field well milling junk mill, including junk mill body（1）, it is characterised in that：Junk mill body（1）It is cylinder,
Junk mill body（1）Cylindrical be provided be uniformly distributed along the circumference one group band ball centralizer（2）, one group of flow path groove（3）With one group of T-slot
（4）；One group of flow path groove（3）With junk mill body（1）One group of interior hydrophthalmia hole（5）Connection；T-slot（4）T-shaped is inside respectively equipped with to cut
Paring blade（6）；Junk mill body（1）Bottom surface be evenly equipped with one group of hard alloy columnar（7）；The band ball centralizer（2）Including helping
Positive block（10）, wiper block（10）Adjusted screw（11）Installed in junk mill body（1）Groove in, spring is provided with groove
（12）；Wiper block（10）Ball recess is provided with, ball is provided with ball recess（13）, wiper block（10）It is provided with pressing plate
（14）, pressing plate（14）It is provided with and ball（13）Corresponding circular hole, pressing plate（14）Through bolt and wiper block（10）Connection.
2. oil field well milling junk mill according to claim 1, it is characterised in that：The junk mill body（1）Bottom surface
It is plane, one layer of hard alloy particle (8) of surfacing on bottom surface.
3. oil field well milling junk mill according to claim 1, it is characterised in that：The T-shaped cutting tip（6）On set
There is one group of groove（9）.
4. oil field well milling junk mill according to claim 1, it is characterised in that：The T-shaped cutting tip（6）It is provided with
Preceding angle beta and relief angle α, preceding angle beta angle are 8 °, and relief angle α angles are 15 °.
5. oil field well milling junk mill according to claim 1, it is characterised in that：One group of hard alloy columnar (7)
Arranged by spiral of Archimedes arrangement mode.
6. oil field well milling junk mill according to claim 1, it is characterised in that：The hard alloy columnar (7) is six
Prism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210542192.XA CN103775014B (en) | 2012-12-14 | 2012-12-14 | A kind of oil field well milling junk mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210542192.XA CN103775014B (en) | 2012-12-14 | 2012-12-14 | A kind of oil field well milling junk mill |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103775014A CN103775014A (en) | 2014-05-07 |
| CN103775014B true CN103775014B (en) | 2017-07-11 |
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ID=50567710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210542192.XA Active CN103775014B (en) | 2012-12-14 | 2012-12-14 | A kind of oil field well milling junk mill |
Country Status (1)
| Country | Link |
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| CN (1) | CN103775014B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113621A (en) * | 2018-11-01 | 2019-01-01 | 黄淮学院 | A kind of modularization junk mill and preparation method thereof |
| 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 |
| CN109488243A (en) * | 2018-12-18 | 2019-03-19 | 贵州高峰石油机械股份有限公司 | A kind of high antitorque grinding machine head |
| 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 (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Family Cites Families (5)
| 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 |
| CA2534876C (en) * | 1999-04-16 | 2007-03-13 | 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 |
| CN201891393U (en) * | 2010-12-17 | 2011-07-06 | 中国石油天然气集团公司 | Eccentric wear prevention ball centralizer |
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2012
- 2012-12-14 CN CN201210542192.XA patent/CN103775014B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN103775014A (en) | 2014-05-07 |
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