CN105971561A - Composite sleeve scraper for well drilling - Google Patents
Composite sleeve scraper for well drilling Download PDFInfo
- Publication number
- CN105971561A CN105971561A CN201610462012.5A CN201610462012A CN105971561A CN 105971561 A CN105971561 A CN 105971561A CN 201610462012 A CN201610462012 A CN 201610462012A CN 105971561 A CN105971561 A CN 105971561A
- Authority
- CN
- China
- Prior art keywords
- scraper
- cylinder sleeve
- mandrel
- assemblied
- drilling well
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 18
- 239000002131 composite material Substances 0.000 title abstract 3
- 125000006850 spacer group Chemical group 0.000 claims description 19
- 150000001875 compounds Chemical class 0.000 claims description 17
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 3
- 238000010297 mechanical methods and process Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 210000003660 reticulum Anatomy 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
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 discloses a composite sleeve scraper for well drilling. The composite sleeve scraper comprises a flexible scraper mechanism and a hard scraper mechanism which are axially assembled together. The flexible scraper mechanism is mainly composed of a first cylinder sleeve, a pressure bearing mechanism, a mandrel and scraper blades. At least one set of scraper windows is arranged in the circumferential direction of the first cylinder sleeve. The pressure bearing mechanism is assembled at the position, above the scraper windows, in the first cylinder sleeve. The mandrel is assembled in the first cylinder sleeve through a guide mechanism and a reset spring. The upper end of the mandrel is connected with the pressure bearing mechanism, and cones corresponding to the scraper windows are arranged on the mandrel. The scraper blades are assembled in the scraper windows in the radial direction. The hard scraper mechanism is mainly composed of a second cylinder sleeve, elastic elements and scraper blades. At least one set of scraper grooves is formed in the circumferential direction of the second cylinder sleeve. The scraper blades are assembled in the scraper grooves in the radial direction through the elastic elements. Foreign matter is removed flexibly and rigidly, operation is easy, and work efficiency is high.
Description
Technical field
The instrument of removing obstacles of sleeve pipe attachment when the present invention relates to horizontal well completion, well workover, specifically a kind of drilling well is with compound sleeve pipe pipeline scraper.
Background technology
Oil/gas Well, through underground work such as pumping medium, injection water quality, with attachments such as cement block, cement sheath, hard wax, various saline crystallizations on Oil/gas Well inner sleeve inwall, due to the appearance of sleeve pipe attachment, causes run through casing size to diminish.
It is Mechanical Method, chemical method and the two method organically combined that tradition removes the method for Oil/gas Well inner sleeve, and chemical method consumes substantial amounts of drilling cost, and not reproducible utilization, therefore most of Oil/gas Well inner sleeve inwall is removed foreign body and removed frequently with Mechanical Method.
Mechanical Method is removed foreign body foreign object in pipe and rigidity can be divided into remove foreign body method and flexible removing foreign body method two kinds; although rigidity is removed foreign body method and is scraped tube efficiency height; but it is bigger to casing failure; flexible removing foreign body method is preferable to the protection of sleeve pipe, but removes stupid hard attachment poor effect, in drillng operation; if scraping mode selects unreasonable; to affect job execution progress, injure sleeve pipe, consume a large amount of operating cost simultaneously.
Summary of the invention
It is an object of the invention to: for above-mentioned the deficiencies in the prior art, it is provided that one had both achieved flexible removes foreign body, achieves again rigidity and removes foreign body, the high a kind of drilling well of simple to operate, work efficiency is with compound sleeve pipe pipeline scraper.
The technical solution used in the present invention is, a kind of drilling well compound sleeve pipe pipeline scraper, described pipeline scraper include being axially mounted to flexible scraper mechanism together and rigid scraper mechanism；Described flexible scraper mechanism is mainly made up of the first cylinder sleeve, bearing mechanism, mandrel and wing, described first cylinder sleeve circumference is provided with least one set scraper window, described bearing mechanism is assemblied in the first cylinder sleeve above scraper window, described mandrel is assemblied in the first cylinder sleeve by guiding mechanism and back-moving spring, the upper end of this mandrel is connected with bearing mechanism, and mandrel is provided with the cone of corresponding scraper window, described wing radially loading fits in scraper window；Main second cylinder sleeve of described rigid scraper mechanism, flexible member and wing composition, described second cylinder sleeve circumference is provided with least one set blade groove, and described wing is fitted in blade groove by flexible member radially loading.
Described guiding mechanism is mainly made up of cam and the spacer pin being assemblied in the first cylinder sleeve, described cam two ends are assemblied on mandrel by thrust bearing, this cam outer wall is provided with " W " track guide chute, and described spacer pin extends radially in the guide chute of cam.
Further, described spacer pin is mainly made up of block, slide block and the back-moving spring of blind cavernous structure, and described block is assemblied on the first cylinder sleeve, and described slide block is assemblied in block by back-moving spring, and this slide block mates with the guide chute of cam.
Described bearing mechanism is mainly made up of valve seat, valve rod, piston, described valve seat is assemblied on the first cylinder sleeve, described valve rod is axially mounted on the valve seat on the first cylinder sleeve, multiple through hole it is provided with on valve seat outside this valve rod, and the connection fixing with the mandrel upper end in the orifice plate carrier matched in clearance being assemblied on piston, described piston and the first cylinder sleeve of the end of this valve rod.
Further, described valve rod and orifice plate carrier are with conical surface matched in clearance.
Scraper window on described first cylinder sleeve is two groups, axial in circumferentially staggered arrangement at the first cylinder sleeve of these two groups of scraper windows.
Further, described scraper window is the ladder aperture that internal orifice is big, collar extension is little.
Wing on described second cylinder sleeve is installed by the pressing plate at blade groove two ends.
Further, the blade groove on described second cylinder sleeve is two groups, axial in circumferentially staggered arrangement at the second cylinder sleeve of these two groups of blade groove.
Described core the tip of the axis is provided with float and plug, and the first cylinder bore wall between float and plug has through hole.
The invention has the beneficial effects as follows: the present invention assembles flexible scraper and rigid scraper on compound pipeline scraper, both achieved and flexible removed foreign body, achieve again rigidity and remove foreign body, simple to operate, work efficiency is high.
Accompanying drawing explanation
The present invention is further illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation of flexible scraper mechanism of the present invention.
Fig. 2 is the structural representation of the rigid scraper mechanism of the present invention.
Fig. 3 is the structural representation of guiding mechanism.
Code name implication in figure: 1 flexible scraper mechanism；2 first cylinder sleeves；3 bonnets；4 valve seats；5 valve rods；6 orifice plate carrier；7 pistons；8 pins；9 cams；10 guide chutes；11 spacer pins；12 thrust bearings；18,19,20 back-moving spring；13 mandrels；21,22 wing；14 rigid scraper mechanism；15 second cylinder sleeves；16 pressing plates；17 trip bolts；23 floats；24 through holes；25 plugs；26 cones；W1 primary importance；The W2 second position；W3 the 3rd position；W4 the 4th position；W5 the 5th position.
Detailed description of the invention
See shown in Fig. 1, Fig. 2, Fig. 3: the present invention is a kind of compound sleeve pipe pipeline scraper of drilling well, and described pipeline scraper includes being axially mounted to flexible scraper mechanism 1 together and rigid scraper mechanism 14.Aforesaid flexible scraper mechanism 1 and rigid scraper mechanism 14 are with the most axially assembling (according to actual well drilled handling situations, it is also possible to for rigid scraper mechanism 14 and flexible scraper mechanism 1 with the most axially assembling).By assembling flexible scraper mechanism 1 and rigid scraper mechanism 14 on compound sleeve pipe pipeline scraper, both achieved and flexible removed foreign body, and achieved again rigidity and remove foreign body, simple to operate, work efficiency is high.
Above-mentioned flexible scraper mechanism 1 is mainly made up of the first cylinder sleeve 2, bearing mechanism, mandrel 13 and wing 21, described first cylinder sleeve 2 circumference is provided with least one set scraper window, this scraper window is the ladder aperture that internal orifice is big, collar extension is little, it is ensured that the reliable installation of wing 21, action.Described bearing mechanism is assemblied in the first cylinder sleeve 2 above scraper window, and described mandrel 13 is assemblied in the first cylinder sleeve 2 by guiding mechanism and back-moving spring 19, and this guiding mechanism is positioned at the upper end of back-moving spring 19, and between be provided with back of the body cap.The upper end of this mandrel 13 is connected with bearing mechanism, and mandrel 13 is provided with the cone 26 of corresponding scraper window, described wing 21 radially loading fits in scraper window, in the present invention, scraper window on first cylinder sleeve 2 is two groups, and these two groups of scraper windows are axial in circumferentially staggered arrangement at the first cylinder sleeve 2.With ensure the first cylinder sleeve 2 upper highly dense covering of circumference, improve sleeve pipe pipeline scraper scrape tube efficiency.Wherein, described bearing mechanism is mainly made up of valve seat 4, valve rod 5, piston 7, described valve seat 4 is assemblied on the first cylinder sleeve 2 by multiple circumferentially distributed pins 8, described valve rod 5 is axially mounted on the valve seat 4 on the first cylinder sleeve 2 by bonnet 3, multiple through hole 24 it is provided with on valve seat 4 outside this valve rod 5, and the end of this valve rod 5 and orifice plate carrier 6 matched in clearance being assemblied on piston 7, described piston 7 is by the fixing connection in bearing and mandrel 13 upper end in the first cylinder sleeve 2.Further, described valve rod 5 and orifice plate carrier 6 are with conical surface matched in clearance；Described guiding mechanism is mainly made up of cam 9 and the spacer pin 11 being assemblied in the first cylinder sleeve 2, described cam 9 two ends are assemblied on mandrel 13 by thrust bearing 12, this cam 9 outer wall is provided with " W " track guide chute 10, and described spacer pin 11 extends radially in the guide chute 10 of cam 9.Further, described spacer pin 11 is mainly made up of the block of blind cavernous structure, slide block and back-moving spring 18, and described block is assemblied on the first cylinder sleeve 2, and described slide block is assemblied in block by back-moving spring 18, and this slide block mates with the guide chute 10 of cam 9.
Main second cylinder sleeve 15 of above-mentioned rigid scraper mechanism 14, flexible member and wing 22 form, and described second cylinder sleeve 15 circumference is provided with least one set blade groove, and described wing 22 is fitted in blade groove by flexible member radially loading.Wherein, wing on described second cylinder sleeve 15 22 assembles in blade groove by pressing plate 16, and this pressing plate 16 is fixed on the second cylinder sleeve 15 (that is, the wing 22 on described second cylinder sleeve 15 is installed) by the pressing plate 16 at blade groove two ends by trip bolt 17.Further, the blade groove on described second cylinder sleeve 15 is two groups, and these two groups of blade groove are axially in circumferentially staggered arrangement；Flexible member in the described present invention is back-moving spring 20.
The end of above-mentioned mandrel 13 is provided with float 23 and plug 25, and the first cylinder sleeve 2 wall between float 23 and plug 25 has through hole 24；Above-mentioned piston 7 is provided with sealing structure on mandrel 13 outer surface of mandrel 13 junction；Above-mentioned float 23 bottom is provided with sealing structure；Above-mentioned first cylinder sleeve 2 is divided into upper and lower two parts to form, upper part assembling bearing mechanism and guiding mechanism etc., lower part assembling wing etc., above-mentioned mandrel 13 is assemblied in the first cylinder sleeve 2 by guiding mechanism and back-moving spring, this back-moving spring one end is supported to guiding mechanism, and the other end supports to upper and lower two parts of the first cylinder sleeve 2 points.
Work process:
When mandrel 13 is in original position, spacer pin 11 is positioned in the guide chute 10 of cam 9 at primary importance W1, and wing 21 is in contraction transition.
For the first time after turn on pump, act on bearing mechanism at mud pressure, mandrel 13 is forced to move down, cam 9 on mandrel 13 moves down the most therewith, spacer pin 11 is fixed on the first cylinder sleeve 2 simultaneously, will not move, cam 9 is rotated relative to spacer pin 11, spacer pin 11 slides in guide chute 10, spacer pin 11 slides primary importance W1 by guide chute 10 at second position W2 of guide chute 10, now spacer pin 11 leans with guiding to slide, when cam 9 no longer moves down, mandrel 13 also cannot continue to move down, the descending distance of this stage mandrel 13 is L1.Meanwhile, piston 7, the distance of the most downward descending L1 of orifice plate carrier 6.Now, valve rod 5 is still located in orifice plate carrier 6 endoporus, and all mud must pass through from valve rod 5 and orifice plate carrier 6, a narrow and small annular space formed, and now area of passage is minimum, so mud pressure is the highest；Meanwhile, wing 21 is still in shrinking transition.
Subsequently, slush pump stops for the first time, and mud annular pressure sheds, and under the effect of back-moving spring 19, mandrel 13 moves up, and now, spacer pin 11 slides at the 3rd position W3 at second position W2 of the guide chute 10 of cam 9, and orifice plate carrier 6 returns to initial position.
When slush pump second time starts, mandrel 13 moves down, cam 9 moves down the most therewith, spacer pin 11 slides at the 4th position W4 at the 3rd position W3 of the guide chute 10 of cam 9, sliding to the 5th position W5 again, now spacer pin 11 leans with guide chute 10, and cam 9 no longer moves down, mandrel 13 also cannot continue to move down, and the descending distance of this stage mandrel 13 is L2.Meanwhile, the distance of piston 7, orifice plate carrier 6 also downward L2.Now, valve rod 5 leaves orifice plate carrier 6 endoporus, and the annulus access between them becomes suddenly big, when comparing with first time turn on pump, in the case of discharge capacity is identical, owing to circulation passage becomes big, makes the mud pressure of system reduce；Meanwhile, wing 21 is the state of stretching out.
Subsequently, slush pump second time stops, and mud annular pressure sheds, and under the effect of back-moving spring 19, mandrel 13 moves up, and now, cam 9, orifice plate carrier 6 etc. all return to initial position.
As above circulate, thus pass through startup and the stopping of slush pump so that it is rigid scraper mechanism is in different duties.When mud pressure is higher, the rigid scraper mechanism of patent of the present invention 1 is in contraction state, and now, flexible scraper mechanism 1 is in work；When mud pressure is relatively low, the rigid scraper mechanism of patent of the present invention 1 is in the state of stretching out, and can remove tough stains.
Concrete technical scheme is only in order to illustrate the present invention above, is not intended to limit.Although the present invention being described in detail with reference to above-mentioned concrete technical scheme, it will be understood by those within the art that: above-mentioned concrete technical scheme still can be modified by it, or wherein portion of techniques feature is carried out equivalent；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of the present invention.
Claims (10)
1. a drilling well is with compound sleeve pipe pipeline scraper, it is characterised in that: described pipeline scraper includes being axially mounted to flexible scraper mechanism together and rigid scraper mechanism；
Described flexible scraper mechanism is mainly made up of the first cylinder sleeve, bearing mechanism, mandrel and wing, described first cylinder sleeve circumference is provided with least one set scraper window, described bearing mechanism is assemblied in the first cylinder sleeve above scraper window, described mandrel is assemblied in the first cylinder sleeve by guiding mechanism and back-moving spring, the upper end of this mandrel is connected with bearing mechanism, and mandrel is provided with the cone of corresponding scraper window, described wing radially loading fits in scraper window；
Main second cylinder sleeve of described rigid scraper mechanism, flexible member and wing composition, described second cylinder sleeve circumference is provided with least one set blade groove, and described wing is fitted in blade groove by flexible member radially loading.
The most according to claim 1, drilling well is with compound sleeve pipe pipeline scraper, it is characterized in that: described guiding mechanism is mainly made up of cam and the spacer pin being assemblied in the first cylinder sleeve, described cam two ends are assemblied on mandrel by thrust bearing, this cam outer wall is provided with " W " track guide chute, and described spacer pin extends radially in the guide chute of cam.
The most according to claim 2, drilling well is with compound sleeve pipe pipeline scraper, it is characterized in that: described spacer pin is mainly made up of block, slide block and the back-moving spring of blind cavernous structure, described block is assemblied on the first cylinder sleeve, described slide block is assemblied in block by back-moving spring, and this slide block mates with the guide chute of cam.
The most according to claim 1, drilling well is with compound sleeve pipe pipeline scraper, it is characterized in that: described bearing mechanism is mainly made up of valve seat, valve rod, piston, described valve seat is assemblied on the first cylinder sleeve, described valve rod is axially mounted on the valve seat on the first cylinder sleeve, multiple through hole it is provided with on valve seat outside this valve rod, and the connection fixing with the mandrel upper end in the orifice plate carrier matched in clearance being assemblied on piston, described piston and the first cylinder sleeve of the end of this valve rod.
The most according to claim 4, drilling well is with compound sleeve pipe pipeline scraper, it is characterised in that: described valve rod and orifice plate carrier are with conical surface matched in clearance.
The most according to claim 1, drilling well is with compound sleeve pipe pipeline scraper, it is characterised in that: the scraper window on described first cylinder sleeve is two groups, axial in circumferentially staggered arrangement at the first cylinder sleeve of these two groups of scraper windows.
7. according to drilling well described in claim 1 or 6 with compound sleeve pipe pipeline scraper, it is characterised in that: described scraper window is the ladder aperture that internal orifice is big, collar extension is little.
The most according to claim 1, drilling well is with compound sleeve pipe pipeline scraper, it is characterised in that: the wing on described second cylinder sleeve is installed by the pressing plate at blade groove two ends.
The most according to claim 8, drilling well is with compound sleeve pipe pipeline scraper, it is characterised in that: the blade groove on described second cylinder sleeve is two groups, axial in circumferentially staggered arrangement at the second cylinder sleeve of these two groups of blade groove.
The most according to claim 1, drilling well is with compound sleeve pipe pipeline scraper, it is characterised in that: described core the tip of the axis is provided with float and plug, and the first cylinder bore wall between float and plug has through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610462012.5A CN105971561A (en) | 2016-06-23 | 2016-06-23 | Composite sleeve scraper for well drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610462012.5A CN105971561A (en) | 2016-06-23 | 2016-06-23 | Composite sleeve scraper for well drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105971561A true CN105971561A (en) | 2016-09-28 |
Family
ID=57022525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610462012.5A Pending CN105971561A (en) | 2016-06-23 | 2016-06-23 | Composite sleeve scraper for well drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105971561A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112170971A (en) * | 2020-10-29 | 2021-01-05 | 宁波真格液压科技有限公司 | Deburring process for valve body of six-path reversing valve |
| CN117307097A (en) * | 2023-11-29 | 2023-12-29 | 胜利油田畅海石油技术有限公司 | Offshore platform continuous capillary steel pipe oil pipe passing descaling device and use method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201428430Y (en) * | 2009-06-10 | 2010-03-24 | 东营市铁人石油机具有限公司 | Novel combined casing scraper |
| CN202914039U (en) * | 2012-10-15 | 2013-05-01 | 大港油田集团有限责任公司 | Hydraulic type sleeve scraper |
| CN203808841U (en) * | 2014-03-22 | 2014-09-03 | 王传伟 | Tool used for enlarging wellbore diameter |
| CN204113225U (en) * | 2014-09-09 | 2015-01-21 | 中国石油天然气股份有限公司 | Spring type casing pigging scraper |
| EP2848764A1 (en) * | 2013-09-17 | 2015-03-18 | Welltec A/S | Downhole wireline cleaning tool |
| CN204320512U (en) * | 2014-11-26 | 2015-05-13 | 辽河石油勘探局 | Liner oil pipe scraping cleaning shower nozzle |
| CN205858279U (en) * | 2016-06-23 | 2017-01-04 | 中石化石油工程技术服务有限公司 | A kind of drilling well is with compound sleeve pipe pipeline scraper |
-
2016
- 2016-06-23 CN CN201610462012.5A patent/CN105971561A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201428430Y (en) * | 2009-06-10 | 2010-03-24 | 东营市铁人石油机具有限公司 | Novel combined casing scraper |
| CN202914039U (en) * | 2012-10-15 | 2013-05-01 | 大港油田集团有限责任公司 | Hydraulic type sleeve scraper |
| EP2848764A1 (en) * | 2013-09-17 | 2015-03-18 | Welltec A/S | Downhole wireline cleaning tool |
| CN203808841U (en) * | 2014-03-22 | 2014-09-03 | 王传伟 | Tool used for enlarging wellbore diameter |
| CN204113225U (en) * | 2014-09-09 | 2015-01-21 | 中国石油天然气股份有限公司 | Spring type casing pigging scraper |
| CN204320512U (en) * | 2014-11-26 | 2015-05-13 | 辽河石油勘探局 | Liner oil pipe scraping cleaning shower nozzle |
| CN205858279U (en) * | 2016-06-23 | 2017-01-04 | 中石化石油工程技术服务有限公司 | A kind of drilling well is with compound sleeve pipe pipeline scraper |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112170971A (en) * | 2020-10-29 | 2021-01-05 | 宁波真格液压科技有限公司 | Deburring process for valve body of six-path reversing valve |
| CN117307097A (en) * | 2023-11-29 | 2023-12-29 | 胜利油田畅海石油技术有限公司 | Offshore platform continuous capillary steel pipe oil pipe passing descaling device and use method |
| CN117307097B (en) * | 2023-11-29 | 2024-03-05 | 胜利油田畅海石油技术有限公司 | Offshore platform continuous capillary steel pipe oil pipe passing descaling device and use method |
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Application publication date: 20160928 |
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