CN110529074A - A kind of drill bit synchronous rotary pipeline scraper - Google Patents
A kind of drill bit synchronous rotary pipeline scraper Download PDFInfo
- Publication number
- CN110529074A CN110529074A CN201910997148.XA CN201910997148A CN110529074A CN 110529074 A CN110529074 A CN 110529074A CN 201910997148 A CN201910997148 A CN 201910997148A CN 110529074 A CN110529074 A CN 110529074A
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- China
- Prior art keywords
- spring
- movable plate
- interlocking lever
- drill bit
- synchronous rotary
- 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.)
- Granted
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 18
- 238000007790 scraping Methods 0.000 claims abstract description 20
- 230000000694 effects Effects 0.000 claims abstract description 12
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 abstract description 8
- 238000004140 cleaning Methods 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 description 8
- 238000003825 pressing Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 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)
- Cleaning In General (AREA)
Abstract
The invention discloses a kind of drill bit synchronous rotary pipeline scrapers, including cylinder, several mounting grooves are provided on the barrel of cylinder, it is connected in mounting groove by the first spring and scrapes knife plate, the second spring that coefficient of elasticity is much larger than the first spring is additionally provided in mounting groove, second spring top is equipped with movable plate, the bottom of first spring is mounted on movable plate, movable plate one end is connected with interlocking lever, interlocking lever end is extend out to outside cylinder, interlocking lever has protruding or to contract space, and when interlocking lever is protruding, movable plate is moved radially outward along cylinder, when interlocking lever is to contract, movable plate is driven to move radially inwardly along cylinder.The advantage of the invention is that no matter how the actual inner diameter of casing changes, scraping knife plate can carry out scraping with nearly constant extruding dynamics, it is avoided that the stuck situation of the damage of scraper caused by scraping dynamics is excessive, drilling tool, and is avoided that the situation of cleaning effect difference caused by scraping dynamics is too small.
Description
Technical field
The present invention relates to drilling equipment technical fields, and in particular to a kind of drill bit synchronous rotary pipeline scraper.
Background technique
In oil extraction process, casing inner cylinder can adhere to often cement block, cement sheath, hard wax, various saline crystallizations and
The objects such as generated iron oxide after deposit, perforation burrs and casing corrosion, therefore, it is necessary to tripping in pipeline scrapers in well
Under casing inner cylinder carry out prune job, to improve the success rate of tool tripping in and operation, the latus rectum of retaining sleeve is constant.Pipe cleaning
Device is usually used cooperatively with screw motor, is mounted on drill bit rear and drill bit synchronous rotary, is cleaned simultaneously in drilling process
Internal surface of sleeve pipe saves and primary additional removes process.
Most commonly seen drill bit synchronous rotary pipeline scraper is spring casing pipeline scraper, scrapes knife plate and is connected to by spring
On shell wall, when use, scrapes knife plate under spring squeezing action, expands outwardly and be tightly attached to internal surface of sleeve pipe, realizes scraping work
Make.There are a drawbacks for the structure: if casing inner diameter is larger, spring excessively extends, and the resilient pressing force for causing it to provide is not
Foot, shaving effect are undesirable；If encounter casing inner diameter it is smaller when, spring excessively compresses, cause its provide resilient pressing force mistake
Greatly, long-term high-intensitive scraping, is easily damaged scraper.In this case, if casing inner cylinder there are a certain section of attachment cement block, various salt
The thicker situation such as class crystallization and deposit, this makes this section of casing inner diameter become smaller, if scraper is directly in larger resilient pressing force
Under the action of carry out scraping, it is easy to cause scraper to damage, it is harder to encounter deposit, or even also entire drilling tool can be made stuck
It can not rotate.
Although casing inner diameter amplitude of variation is little in normal use, since spring length is short, lesser width
Degree variation also can cause spring extruding force to change greatly, so the drawback can not be ignored, it would be highly desirable to solve.
Summary of the invention
The purpose of the present invention is to provide a kind of drill bit synchronous rotary pipeline scrapers, and which solve conventional springs formula casing pipes cleaning
Spring resilient pressing force changes with casing inner diameter and is changed in device, caused by scraper damage or shaving effect is undesirable asks
Topic.
The present invention through the following technical solutions to achieve the above objectives:
A kind of drill bit synchronous rotary pipeline scraper, including cylinder are provided with several mounting grooves, the installation on the barrel of the cylinder
It is connected in slot by the first spring and scrapes knife plate, the second bullet that coefficient of elasticity is much larger than the first spring is additionally provided in the mounting groove
Spring, the second spring top are equipped with movable plate, and the bottom of first spring is mounted on movable plate, described movable plate one end
It is connected with interlocking lever, the interlocking lever end is extend out to outside cylinder, and interlocking lever has protruding or to contract space,
And when interlocking lever is protruding, the movable plate is moved radially outward along cylinder, when interlocking lever is to contract, drive activity
Plate is moved radially inwardly along cylinder.
Further improvement lies in that the coefficient of elasticity of the second spring is 10 to 12 times of second spring.
Further improvement lies in that three that the second spring is at least uniformly arranged along mounting groove slot bottom, and in activity
The bottom of plate is provided with jack corresponding with every second spring.
Further improvement lies in that being equipped with the guide rail of one group of opposition in the mounting groove, the both ends of the movable plate are movable
It is connected on guide rail, and is provided with through slot on the guide rail of wherein one end, for across interlocking lever.
Further improvement lies in that the interlocking lever is integrally formed by axial stem and radial bars, the axial stem and movable plate
It is fixedly connected, the radial bars are extended radially out along cylinder.
Further improvement lies in that the end of the interlocking lever offers spherical groove, activity is embedded with rolling in the spherical groove
Dynamic ball.
Further improvement lies in that the roller ball is made of silicon nitride material, the spherical groove inner surface is covered with one
Layer silicon nitride coating.
Further improvement lies in that the side for scraping knife plate is equipped with bolt retainer.
The beneficial effects of the present invention are: in casing scraping, no matter how the actual inner diameter of casing changes, and it is equal to scrape knife plate
Scraping can be carried out with nearly constant extruding dynamics, that is, be avoided that caused by scraping dynamics is excessive that scraper damage, drilling tool are stuck
The case where, and it is avoided that the situation of cleaning effect difference caused by scraping dynamics is too small.
Detailed description of the invention
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is the sectional view of part-structure of the present invention；
Fig. 3 is the connection schematic diagram of guide rail and movable plate；
In figure: 1, cylinder；2, mounting groove；3, the first spring；4, knife plate is scraped；5, second spring；6, movable plate；7, interlocking lever；8,
Jack；9, guide rail；10, through slot；11, spherical groove；12, roller ball；13, bolt retainer.
Specific embodiment
The application is described in further detail with reference to the accompanying drawing, it is necessary to it is indicated herein to be, implement in detail below
Mode is served only for that the application is further detailed, and should not be understood as the limitation to the application protection scope, the field
Technical staff can make some nonessential modifications and adaptations to the application according to above-mentioned application content.
In conjunction with shown in Fig. 1 to Fig. 3, a kind of drill bit synchronous rotary pipeline scraper, including cylinder 1, if being provided on the barrel of cylinder 1
Dry mounting groove 2, interior be connected with by the first spring 3 of mounting groove 2 scrape knife plate 4, scrape knife plate 4 and stretch out from the side of cylinder 1, be used for
Scraping cleaning is carried out to internal surface of sleeve pipe.The side for scraping knife plate 4 is equipped with bolt retainer 13, scrapes knife plate 4 for mounting and dismounting.
The second spring 5 that coefficient of elasticity is much larger than the first spring 3, the bullet of specific second spring 5 are additionally provided in mounting groove 2
Property coefficient is 10 to 12 times of second spring 5, and when the effect by same size power, the deformation quantity of the first spring 3 is second
10 to 12 times of spring 5.At least be uniformly arranged along 2 slot bottom of mounting groove three of second spring 5, and in the bottom of movable plate 6
It is provided with jack 8 corresponding with every second spring 5, the support of several second springs 5 ensure that the stationarity of movable plate 6.
It is equipped with movable plate 6 on 5 top of second spring, the bottom of the first spring 3 is mounted on movable plate 6,6 one end of movable plate
It is connected with interlocking lever 7,7 end of interlocking lever is extend out to outside cylinder 1.In order to guarantee that movable plate 6 can be moved steadily, in mounting groove 2
It is inside equipped with the guide rail 9 of one group of opposition, the both ends of movable plate 6 are flexibly connected on the rail 9, and on the guide rail of wherein one end 9
It is provided with through slot 10, for across interlocking lever 7.10 width of through slot is equal across the width of part with interlocking lever 7, and 10 length of through slot is big
The thickness of part is passed through in interlocking lever 7, so that interlocking lever 7 can radially move back and forth.
It should be noted that under normal circumstances scraping when, the decrement of the first spring 3 is 2-3cm, and identical power acts on
Decrement in second spring 5 is about 2mm, and due to being overlaying structure, this can make the first spring 3 that the deformation of 2mm or so also occur
Amount, and for this first spring 3 lesser for coefficient of elasticity, the change of extruding force is almost negligible to be disregarded.
Interlocking lever 7 is integrally formed by axial stem and radial bars, and axial stem passes through through slot 10 and is fixedly connected with movable plate 6,
Radial bars are extended radially out along cylinder 1.It is equipped in the barrel of cylinder 1 for interlocking lever 7 to be protruding or sky to contract
Between, and when interlocking lever 7 is protruding, movable plate 6 is moved radially outward along cylinder 1, when interlocking lever 7 is to contract, is driven
Movable plate 6 is moved radially inwardly along cylinder 1.
The end of interlocking lever 7 offers spherical groove 11, and 11 inner surface of spherical groove is covered with one layer of silicon nitride coating, spherical groove
Activity is embedded with roller ball 12 in 11, and roller ball 12 is made of silicon nitride material.The silicon nitride material coefficient of expansion is small, high temperature
When, locking phenomenon will not occur in spherical groove 11；In addition, silicon nitride material hardness is very big, excellent wear-resisting property, and itself has
There is lubricity, so that the rotation that roller ball 12 also can be stable in poor environment.The setting of roller ball 12, so that in second spring
In the biggish situation of 5 coefficient of elasticity, the rotation that interlocking lever 7 is moved freely against internal surface of sleeve pipe, to pipeline scraper still can guarantee
It will not be impacted with moving up and down.
In the use of the present invention, pipeline scraper is mounted on drill bit rear and drill bit synchronous rotary, and it is sent into well together
Under.During feeding, the roller ball 12 of 7 end of interlocking lever is in rolling contact with internal surface of sleeve pipe.When encountering certain on internal surface of sleeve pipe
When one section of deposit is thicker, some thickness of deposits reach 3cm or more, are equivalent to casing radius and reduce 3cm or more, if tradition
Pipeline scraper, this will obviously increase considerably the extruding force of the first spring 3, it is easy to cause the damage of scraper or even the card of drilling tool
Extremely；And use the present invention, internal surface of sleeve pipe can force interlocking lever 7 to move radially inwardly, drive movable plate 6 along guide rail 9 it is radial to
Interior movement, second spring 5 is compressed, so that the distance between movable plate 6 and internal surface of sleeve pipe are kept approximately constant, at this time first
The extruding force of spring 3 is also just almost unchanged, is equivalent to and carries out scraping with normal extruding force, scraping each time can make thicker
Deposit is more thinning, can clear up completely after multiple scraping, and the mode of this scraping several times effectively can avoid scraper from damaging
Situation bad, drilling tool is stuck.When encounter a certain section of internal surface of sleeve pipe it is serious by drilling fluid erosion when, internal diameter expand, if tradition
Pipeline scraper, this will obviously reduce the extruding force of the first spring 3, reduce shaving effect；And the present invention is used, casing inner diameter becomes larger meeting
Keep interlocking lever 7 corresponding protruding, movable plate 6 can be moved radially outward under the elastic reaction of second spring 5, can still be made
The distance between movable plate 6 and internal surface of sleeve pipe are kept approximately constant, so that the first spring 3 provides sufficient extruding force, guarantee to scrape
Cut cleaning effect.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.
Claims (8)
1. a kind of drill bit synchronous rotary pipeline scraper, including cylinder (1), several mounting grooves are provided on the barrel of the cylinder (1)
(2), it is connected in the mounting groove (2) by the first spring (3) and scrapes knife plate (4), it is characterised in that: in the mounting groove (2)
It is additionally provided with the second spring (5) that coefficient of elasticity is much larger than the first spring (3), second spring (5) top is equipped with movable plate
(6), the bottom of first spring (3) is mounted on movable plate (6), and described movable plate (6) one end is connected with interlocking lever (7),
Interlocking lever (7) end extend out to cylinder (1) outside, and interlocking lever (7) has protruding or to contract space, and works as
When interlocking lever (7) is protruding, the movable plate (6) is moved radially outward along cylinder (1), when interlocking lever (7) is to contract,
Movable plate (6) are driven to move radially inwardly along cylinder (1).
2. a kind of drill bit synchronous rotary pipeline scraper according to claim 1, it is characterised in that: the second spring (5)
Coefficient of elasticity is 10 to 12 times of second spring (5).
3. a kind of drill bit synchronous rotary pipeline scraper according to claim 1, it is characterised in that: the second spring (5) is extremely
Rare three be uniformly arranged along mounting groove (2) slot bottom, and be provided with and every second spring (5) phase in the bottom of movable plate (6)
Corresponding jack (8).
4. a kind of drill bit synchronous rotary pipeline scraper according to claim 1, it is characterised in that: set in the mounting groove (2)
There is the guide rail (9) of one group of opposition, the both ends of the movable plate (6) are movably connected on guide rail (9), and leading in wherein one end
Through slot (10) are provided on rail (9), for across interlocking lever (7).
5. a kind of drill bit synchronous rotary pipeline scraper according to claim 1, it is characterised in that: the interlocking lever (7) is by axis
Be integrally formed to bar and radial bars, the axial stem is fixedly connected with movable plate (6), the radial bars along cylinder (1) radially to
Outer stretching.
6. a kind of drill bit synchronous rotary pipeline scraper according to claim 1, it is characterised in that: the end of the interlocking lever (7)
End offers spherical groove (11), and activity is embedded with roller ball (12) in the spherical groove (11).
7. a kind of drill bit synchronous rotary pipeline scraper according to claim 6, it is characterised in that: the roller ball (12) uses
Silicon nitride material is made, and spherical groove (11) inner surface is covered with one layer of silicon nitride coating.
8. a kind of drill bit synchronous rotary pipeline scraper according to claim 1, it is characterised in that: the side for scraping knife plate (4)
Side is equipped with bolt retainer (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997148.XA CN110529074B (en) | 2019-10-20 | 2019-10-20 | Drill bit synchronous rotation pipe scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997148.XA CN110529074B (en) | 2019-10-20 | 2019-10-20 | Drill bit synchronous rotation pipe scraper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110529074A true CN110529074A (en) | 2019-12-03 |
| CN110529074B CN110529074B (en) | 2024-06-11 |
Family
ID=68672109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910997148.XA Active CN110529074B (en) | 2019-10-20 | 2019-10-20 | Drill bit synchronous rotation pipe scraper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110529074B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263239A (en) * | 2022-09-29 | 2022-11-01 | 胜利油田东方实业投资集团有限责任公司 | Scraper for oil field construction operation |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB845338A (en) * | 1958-10-10 | 1960-08-17 | Williamson Inc T | Pipeline scraper |
| US4798246A (en) * | 1987-04-22 | 1989-01-17 | Best David M | Pipe scraper |
| US6209647B1 (en) * | 1997-02-21 | 2001-04-03 | Billy L. Brown, Jr. | Down hole casing string cleaning device and method |
| US6343648B1 (en) * | 1998-06-23 | 2002-02-05 | Specialised Petroleum Services Limited | Down-hole tool with detachable cleaning pads |
| US20040007355A1 (en) * | 2002-03-13 | 2004-01-15 | Hern Gregory Lee | Convertible tubular scraper |
| CN101113664A (en) * | 2006-07-27 | 2008-01-30 | 黄国洲 | Oil passageway cleaning telescopic roll doctor and working method |
| US20120241145A1 (en) * | 2006-12-12 | 2012-09-27 | Wellbore Energy Solutions, Llc | Downhole scraping and/or brushing tool and related methods |
| CN103210176A (en) * | 2010-10-04 | 2013-07-17 | 贝克休斯公司 | Remotely controlled apparatus for downhole applications, components for such apparatus, remote status indication devices for such apparatus, and related methods |
| CN203499641U (en) * | 2013-09-24 | 2014-03-26 | 轮台格瑞迪斯石油技术有限公司 | Pitching-type controllable wall scraping device |
| US20150027780A1 (en) * | 2013-07-25 | 2015-01-29 | Baker Hughes Incorporated | One Trip Drill and Casing Scrape Method and Apparatus |
| CN204511379U (en) * | 2015-04-08 | 2015-07-29 | 沈旭 | A kind of extension type taper-shaped blade pipeline scraper |
| US20170362917A1 (en) * | 2014-12-19 | 2017-12-21 | Abrado, Inc. | Multi-Bar Scraper for Cleaning Marine Risers and Wellbores |
| US20190162033A1 (en) * | 2017-11-29 | 2019-05-30 | Baker Hughes, A Ge Company, Llc | Bottom Hole Assembly for Cutting and Pulling a Tubular |
| CN210564475U (en) * | 2019-10-20 | 2020-05-19 | 达坦能源科技（上海）有限公司 | Drill bit synchronous rotation pipe scraper |
| US20210131230A1 (en) * | 2018-02-12 | 2021-05-06 | Odfjell Partners Invest Ltd | Downhole Cleaning Apparatus |
-
2019
- 2019-10-20 CN CN201910997148.XA patent/CN110529074B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB845338A (en) * | 1958-10-10 | 1960-08-17 | Williamson Inc T | Pipeline scraper |
| US4798246A (en) * | 1987-04-22 | 1989-01-17 | Best David M | Pipe scraper |
| US6209647B1 (en) * | 1997-02-21 | 2001-04-03 | Billy L. Brown, Jr. | Down hole casing string cleaning device and method |
| US6343648B1 (en) * | 1998-06-23 | 2002-02-05 | Specialised Petroleum Services Limited | Down-hole tool with detachable cleaning pads |
| US20040007355A1 (en) * | 2002-03-13 | 2004-01-15 | Hern Gregory Lee | Convertible tubular scraper |
| CN101113664A (en) * | 2006-07-27 | 2008-01-30 | 黄国洲 | Oil passageway cleaning telescopic roll doctor and working method |
| US20120241145A1 (en) * | 2006-12-12 | 2012-09-27 | Wellbore Energy Solutions, Llc | Downhole scraping and/or brushing tool and related methods |
| CN103210176A (en) * | 2010-10-04 | 2013-07-17 | 贝克休斯公司 | Remotely controlled apparatus for downhole applications, components for such apparatus, remote status indication devices for such apparatus, and related methods |
| US20150027780A1 (en) * | 2013-07-25 | 2015-01-29 | Baker Hughes Incorporated | One Trip Drill and Casing Scrape Method and Apparatus |
| CN203499641U (en) * | 2013-09-24 | 2014-03-26 | 轮台格瑞迪斯石油技术有限公司 | Pitching-type controllable wall scraping device |
| US20170362917A1 (en) * | 2014-12-19 | 2017-12-21 | Abrado, Inc. | Multi-Bar Scraper for Cleaning Marine Risers and Wellbores |
| CN204511379U (en) * | 2015-04-08 | 2015-07-29 | 沈旭 | A kind of extension type taper-shaped blade pipeline scraper |
| US20190162033A1 (en) * | 2017-11-29 | 2019-05-30 | Baker Hughes, A Ge Company, Llc | Bottom Hole Assembly for Cutting and Pulling a Tubular |
| US20210131230A1 (en) * | 2018-02-12 | 2021-05-06 | Odfjell Partners Invest Ltd | Downhole Cleaning Apparatus |
| CN210564475U (en) * | 2019-10-20 | 2020-05-19 | 达坦能源科技（上海）有限公司 | Drill bit synchronous rotation pipe scraper |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115263239A (en) * | 2022-09-29 | 2022-11-01 | 胜利油田东方实业投资集团有限责任公司 | Scraper for oil field construction operation |
| CN115263239B (en) * | 2022-09-29 | 2022-12-02 | 胜利油田东方实业投资集团有限责任公司 | Oil field construction operation is with scraper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110529074B (en) | 2024-06-11 |
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| CB02 | Change of applicant information |
Address after: Room 1807, 497 Zhengli Road, Yangpu District, Shanghai Applicant after: Shanghai datan Energy Technology Co.,Ltd. Address before: Room 1807, 497 Zhengli Road, Yangpu District, Shanghai Applicant before: TARTAN ENERGY TECH (SHANGHAI) LTD. |
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