CN112031692A - External positioning milling composite milling shoe, and oil drilling equipment and method adopting same - Google Patents
External positioning milling composite milling shoe, and oil drilling equipment and method adopting same Download PDFInfo
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- CN112031692A CN112031692A CN202010963922.8A CN202010963922A CN112031692A CN 112031692 A CN112031692 A CN 112031692A CN 202010963922 A CN202010963922 A CN 202010963922A CN 112031692 A CN112031692 A CN 112031692A
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- milling
- shoe
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
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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)
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
Abstract
An external positioning milling composite milling shoe, and an oil drilling device and method adopting the same. The external positioning milling composite milling shoe of the invention comprises: the inside of the collar milling shoe main body is provided with a through hole which is communicated up and down, and the lower end of the collar milling shoe main body is provided with a transverse milling plate; hard alloys are arranged on two sides of the transverse milling plate to achieve the milling and/or cutting effects; the external sleeve is cylindrical and is fixed on the outer side of the lower end of the collar milling shoe main body, the transverse milling plate is sleeved inside the external sleeve, and the side edge of the transverse milling plate is connected with the inner wall of the external sleeve; a plurality of scraping teeth are arranged on the lower end surface of the outer sleeve. The composite milling shoe can mill and mill the internal oil pipe and the external casing pipe simultaneously, can prolong the service life of the milling shoe for underground fishing operation, and improves the actual effect of the fishing operation; the two alloy plates are welded over the center, so that the stability in the cutting process is ensured, no cutting dead zone exists, and the service life of the mill shoe is prolonged.
Description
Technical Field
The invention relates to the oil drilling industry, in particular to an external positioning milling composite grinding shoe, oil drilling equipment adopting the same and an oil drilling method adopting the same.
Background
In the process of oil exploitation and well repair, the underground oil pipe casing is in a corrosive environment for a long time, the inner wall is easy to scale, and the outer surface is easy to corrode, perforate and the like. When the oil pipe is lifted in the well repairing operation, the oil pipe structure is damaged, and the oil pipe cannot be lifted. The scaling inside the oil pipe blocks the oil pipe, and the oil pipe cannot be salvaged. For such situations, flat-bottom shoes are commonly used in the prior art for milling operations.
In the process of milling, the flat-bottom milling shoe drives the milling shoe body to rotate by rotating the drill column, and alloy on the lower part of the milling shoe grinds the top of the oil pipe. In the grinding process, the flat-bottom grinding shoe is not positioned, and rotates and moves randomly in the sleeve along with the drilling pressure and the grinding load, so that the grinding process is often caused, the grinding load changes greatly, the alloy at the lower part is in an impact cutting and grinding state, the alloy at the lower part of the grinding shoe is damaged when bearing impact force, and as a result, the alloy is quickly consumed without being subjected to grinding and milling, and the actual effect of the whole grinding, milling and fishing operation is influenced.
Disclosure of Invention
In view of the above, the main object of the present invention is to provide an external positioning milling composite milling shoe, and an oil drilling apparatus and method using the same, which are intended to at least partially solve the above technical problems.
To achieve the above object, as one aspect of the present invention, there is provided an external locating milling composite milling shoe, comprising:
the inside of the pilot milling shoe main body is provided with a through hole which is communicated up and down, and the lower end of the pilot milling shoe main body is provided with a transverse milling plate which extends downwards; hard alloys are arranged on two sides of the transverse milling plate to achieve the milling and/or cutting functions;
the external sleeve is cylindrical and is fixed on the outer side of the lower end of the collar milling shoe main body, the transverse milling plate is sleeved inside the external sleeve, and the side edge of the transverse milling plate is connected with the inner wall of the external sleeve; and a plurality of scraping teeth are arranged on the lower end surface of the outer sleeve.
As another aspect of the present invention, there is also provided an oil drilling apparatus employing the external locating mill composite milling shoe as described above.
As still another aspect of the present invention, there is also provided a pipe cleaning method including the steps of:
installing the outer positioning sleeve milling composite milling shoe on a milling pipe column and putting the milling pipe column into a well in a technical sleeve;
and rotating the milling pipe column, introducing drilling fluid, and milling and cutting the inner wall of the technical casing, the residual oil pipe in the technical casing, the casing and/or other residual tools by using the outer positioning sleeve milling composite milling shoe.
Based on the technical scheme, the external positioning milling composite milling shoe, the corresponding drilling equipment and the method have at least one of the following beneficial effects:
1. the composite milling shoe can mill and mill the internal oil pipe and the external casing pipe simultaneously, can prolong the service life of the milling shoe for underground fishing operation, and improves the actual effect of the fishing operation;
2. the composite milling shoe adopts two alloy plates to be welded over the center, so that the stability in the cutting process is ensured, no cutting dead zone is caused, and the service life of the milling shoe is prolonged;
drawings
The invention is further described with reference to the following figures and specific examples.
FIG. 1 is a partial longitudinal cross-sectional view of the body of an external locating shell milling composite shoe of the present invention prior to welding;
FIG. 2 is a partial longitudinal cross-sectional view of the outer locating sleeve milling composite milling shoe of the present invention after welding two alloy plates;
FIG. 3A is a partial view of the outer locating mill composite grind shoe of FIG. 2, looking from A;
FIG. 3B is a schematic view of the partial milling position of the outer shoe of FIG. 2 after welding, as viewed from B.
In the above figures, the reference numerals have the following meanings:
1. tie hole grind shoe body 2, internal connection screw thread
3. Main flow channel 4, external pilot sleeve
5. Branch liquid flow channel 6 and transverse milling plate
7. Water tank 8 and blade scraping teeth
9. Weld seam 10, cemented carbide
Detailed Description
In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments. Because the position of the product can be changed at will, the terms of orientation such as "up", "down", "left", "right" and the like in the invention only indicate relative position relationship, but are not used to limit absolute position relationship. In the following description, although the external locating milling composite milling shoe of the present invention is illustrated with reference to fig. 1 and 2 of the present invention in a horizontally disposed mode, the left side is connected with the supported milling sleeve column, and the right side end face forms the milling working face, for the convenience of description, the external locating milling composite milling shoe is also described with reference to the actual working condition of the external locating milling composite milling shoe, the upper part is connected with the supported milling sleeve column, and the lower end face forms the milling working face.
Aiming at the situation that both an inner oil pipe and an outer casing are corroded and two kinds of oil pipes and casings are milled simultaneously in the process of drilling maintenance, the invention designs a milling shoe for milling a corroded oil pipe/casing in a well, in particular to an externally positioned pilot hole milling shoe.
Specifically, the external positioning milling composite milling shoe of the invention comprises:
the inside of the pilot milling shoe main body is provided with a through hole which is communicated up and down, and the lower end of the pilot milling shoe main body is provided with a transverse milling plate which extends downwards; wherein, both sides of the transverse milling plate are provided with a whole block of hard alloy which plays a role in milling and/or cutting;
the external sleeve is cylindrical and is fixed on the outer side of the lower end of the collar milling shoe main body, the transverse milling plate is sleeved inside the external sleeve, and the side edge of the transverse milling plate is connected with the inner wall of the external sleeve; the lower end of the outer sleeve is provided with a plurality of scraping teeth.
The through hole of the pilot milling shoe main body comprises a main flow channel and a plurality of branched flow channels which are connected with the main flow channel and are branched, and the drilling fluid flows through the branched flow channels.
Wherein, the transverse milling plate is of an equal-strength rib plate structure.
Wherein, the transverse milling plate is of a thickness direction gradual change structure, is thickest at the position connected with other parts of the collar milling shoe main body, and the connection part is in smooth transition.
Wherein, the whole hard alloy is arranged at the two sides of the transverse milling plate by brazing, and the alloy is welded through the center.
Wherein, the outer surface of the outer sleeve is provided with a plurality of liquid flow channels for realizing the positioning with the external technical sleeve.
Wherein the scraping teeth are blade scraping teeth.
The invention also discloses oil drilling equipment, in particular to pipeline cleaning equipment, which adopts the external positioning sleeve milling composite milling shoe.
The invention also discloses a pipeline cleaning method for milling the composite grinding shoe by adopting the external positioning sleeve, which comprises the following steps:
installing the outer positioning sleeve milling composite grinding shoe on a milling pipe column and putting the milling pipe column into a well in a technical casing;
and rotating the milling pipe column, introducing drilling fluid, milling and cutting the inner wall of the technical casing and oil pipes, casings and/or other tools remained in the technical casing by using the outer positioning sleeve milling composite milling shoe, and returning the chips to the ground along the external channel of the casing along with the drilling fluid.
The technical solution of the present invention is further explained below with reference to the specific embodiments and the accompanying drawings.
As shown in fig. 1 to 3B, an external pilot sleeve 4 is provided on a pilot mill body 1, a plurality of liquid flow channels 7 are provided on the external side surface of the external pilot sleeve 4, and a plurality of blade scraping teeth 8 are provided on the lower portion. The outside collarband sleeve 4 will be inside remaining, the unnecessary sleeve pipe of technical casing and oil pipe cover simultaneously inside this compound milling shoe at whole milling process, realize with the location of outside technical casing through the outside runner structure of this compound milling shoe, prevent this compound milling shoe irregular rotation in the construction, cause inside milling alloy to wear and tear excessively fast.
The middle of the lower end of the pilot milling shoe main body 1 is provided with a transverse milling plate 6, the transverse milling plate 6 is of an equal-strength rib plate structure, and two sides of the transverse milling plate 6 are welded with the external pilot sleeve 4 through two longitudinal welding seams. The two side surfaces of the transverse milling plate 6 are welded with the whole hard alloy 10 in a regular shape, the hard alloy 10 is welded on the transverse milling plate 6 through brazing, and the hard alloy 10 is welded over the center, so that one alloy can completely cut the whole internal oil pipe and the whole internal sleeve in the cutting and milling processes. The alloy plates on the two sides are welded over the center, so that the stability in the cutting process is ensured, no cutting dead zone exists, and the service life of the composite grinding shoe is prolonged.
A main flow channel 3 is designed at the upper part of a pilot hole milling shoe body 1, the lower part of the pilot hole milling shoe body is branched into two branch flow channels 5, drilling fluid enters the two branch flow channels 5 through the main flow channel 3 in the fishing operation and repair process, cooling liquid washes away chips in the milling engineering through a transverse milling plate 6, and meanwhile, the whole hard alloy 10 is cooled, so that the hard alloy 10 is in a better working environment. The drilling fluid enters the lower part of the sleeve through a gap between the external pilot sleeve 4 and the inner sleeve, and the hard alloy 10 cooling the lower part of the external pilot sleeve 4 simultaneously takes part in carrying scraps and then returns to a wellhead upwards from a flow passage outside the external pilot sleeve 4.
In a more preferred embodiment, the pilot grind shoe body 1 is formed with an internal connection thread 2 capable of maintaining a sealing connection at an upper portion thereof and an internal deep hole (main flow path) 3 at a middle portion thereof during a process of forming the same, and the lower portion of the internal deep hole 3 is connected to two branch holes (branch flow paths) 5. The lower part of the pilot milling shoe main body 1 extends downwards to form a transverse milling plate 6. The transverse milling plate 6 and the external pilot hole sleeve 4 are installed together through welding, and the transverse milling plate 6 is longitudinally inserted into the external pilot hole sleeve 4. The outer pilot sleeve 4 is externally designed with a water channel 7. The lower part of the external pilot hole sleeve 4 is welded with a blade scraping tooth 8, and the blade scraping tooth 8 is welded with hard alloy. The transverse milling plate 6 is designed to be of an equal-strength structure, a whole piece of hard alloy 10 is brazed at the upper part, and the welding needs to be over-center.
The composite shoe milling tool of the present invention is designed to erode the tubing and casing together and form a perforated structure. The composite shoe grinding tool is positioned at the lowest end of the whole set of grinding and milling pipe column, and the outer part of the composite shoe grinding tool is positioned on the inner wall of the technical casing.
The composite shoe grinding tool is lowered to the top of the fish to start the milling operation. When the composite milling shoe rotates forwards, the blade scraping teeth 8 at the lower part of the external pilot sleeve 4 are firstly contacted with dirt and debris at the lower part for milling. As footage is made, the entire casing and tubing is positioned within the outer pilot sleeve 4. And then the pipe is extended downwards, and the transverse milling plate 6 begins to mill corroded oil pipes and sleeves. The upper part of the transverse milling plate 6 is welded with a whole piece of hard alloy 10, double-side welding is adopted, and the transverse milling plate participates in milling corrosion sleeves and oil pipes inside.
Drilling fluid gets into two branch holes 5 of milling shoe lower part through middle processing deep hole 3, reentries outside pilot sleeve 4 in, washes horizontal milling board 6 to take away iron fillings and the impurity that produces in the horizontal milling board 6 milling process. The drilling fluid and the iron filings are returned to the ground through the water channel 9 on the external pilot sleeve 4.
This compound milling shoe instrument adopts outside collarbar sleeve 4 and technical sleeve inner wall to fix a position at whole milling in-process, makes whole compound milling shoe instrument be in steady milling state, and inside horizontal milling plate 6 adopts the design of vertical gradual change equidensity, and carbide 10 welds on horizontal milling plate 6, is in the anterior angle of burden, and at milling in-process, the alloy is more shock-resistant, can prolong the life of alloy, improves the work prescription of single-cylinder.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides an outer location shell mills compound junk mill which characterized in that includes:
the inside of the pilot milling shoe main body is provided with a through hole which is communicated up and down, and the lower end of the pilot milling shoe main body is provided with a transverse milling plate which extends downwards; hard alloys are arranged on two sides of the transverse milling plate to achieve the milling and/or cutting functions;
the external sleeve is cylindrical and is fixed on the outer side of the lower end of the collar milling shoe main body, the transverse milling plate is sleeved inside the external sleeve, and the side edge of the transverse milling plate is connected with the inner wall of the external sleeve; and a plurality of scraping teeth are arranged on the lower end surface of the outer sleeve.
2. The external locating mill compound milling shoe of claim 1 wherein the throughbore in the pilot milling shoe body includes a main fluid passageway and a plurality of bifurcated branch fluid passageways connected thereto for conveying drilling fluid and/or coolant.
3. The external locating mill composite milling shoe as defined in claim 1, wherein the transverse milling plate is of an equal strength rib structure.
4. The external locating milling compound milling shoe as defined in claim 1 wherein the lateral milling plate is of a thickness direction gradient structure, is thickest at the position where it joins the rest of the pilot milling shoe body, and the junction is smoothly transitioned.
5. The external locating mill composite milling shoe as set forth in claim 1, wherein the cemented carbide of each side is a single piece, is mounted by brazing to the opposite side of the transverse milling plate, and is welded over center.
6. The external locating mill composite mill shoe of claim 1, wherein the external surface of the external sleeve is provided with a plurality of fluid passages for locating a technical casing.
7. The external locating mill composite grind shoe of claim 1, wherein the scraping teeth are wing scraping teeth, the wing scraping teeth being serrated.
8. An oil drilling apparatus employing the external locating mill composite milling shoe as defined in any one of claims 1 to 7.
9. The oil drilling apparatus according to claim 8, which is a pipe cleaning apparatus.
10. A method of cleaning a pipe, comprising the steps of:
installing an external locating casing milling composite milling shoe according to any one of claims 1 to 7 on a milling pipe string and running into a well in a technical casing;
and rotating the milling pipe column, introducing drilling fluid, and milling and cutting the inner wall of the technical casing, the residual oil pipe in the technical casing, the casing and/or other residual tools by using the outer positioning sleeve milling composite milling shoe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010963922.8A CN112031692A (en) | 2020-09-14 | 2020-09-14 | External positioning milling composite milling shoe, and oil drilling equipment and method adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010963922.8A CN112031692A (en) | 2020-09-14 | 2020-09-14 | External positioning milling composite milling shoe, and oil drilling equipment and method adopting same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112031692A true CN112031692A (en) | 2020-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010963922.8A Pending CN112031692A (en) | 2020-09-14 | 2020-09-14 | External positioning milling composite milling shoe, and oil drilling equipment and method adopting same |
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| CN (1) | CN112031692A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115142805A (en) * | 2022-06-09 | 2022-10-04 | 淮安市井神钻采机具有限公司 | Composite milling shoe |
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| CN110886586A (en) * | 2019-12-18 | 2020-03-17 | 贵州高峰石油机械股份有限公司 | Method for improving cutting efficiency of grinding shoe and fracture centering grinding and milling shoe used in method |
| CN212583657U (en) * | 2020-09-14 | 2021-02-23 | 北京博德世达石油技术股份有限公司 | Outer positioning sleeve milling composite grinding shoe and oil drilling equipment adopting same |
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2020
- 2020-09-14 CN CN202010963922.8A patent/CN112031692A/en active Pending
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| CN2718211Y (en) * | 2004-04-16 | 2005-08-17 | 辽河石油勘探局 | Reconditioning casing probe milling awl |
| US20080000633A1 (en) * | 2006-06-30 | 2008-01-03 | Baker Hughes, Incorporated | Downhole abrading tools having a hydrostatic chamber and uses therefor |
| CN202187736U (en) * | 2011-07-18 | 2012-04-11 | 海城市石油机械制造有限公司 | Grind shoe |
| CN202611642U (en) * | 2012-06-08 | 2012-12-19 | 中国石油天然气股份有限公司青海油田分公司 | Eccentric reaming mill shoe |
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| CN203856439U (en) * | 2014-04-04 | 2014-10-01 | 胜利油田东胜精攻石油开发集团股份有限公司 | Novel milling shoe fishing barrel |
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| CN207420516U (en) * | 2017-11-21 | 2018-05-29 | 新疆盛源通石油技术服务有限责任公司 | A kind of preventing oil pipe split junk mill |
| CN209413876U (en) * | 2018-07-19 | 2019-09-20 | 中海油能源发展股份有限公司 | A kind of new V-neck V eye junk mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115142805A (en) * | 2022-06-09 | 2022-10-04 | 淮安市井神钻采机具有限公司 | Composite milling shoe |
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