CN106639983B - A kind of reducing casing pipeline scraper - Google Patents
A kind of reducing casing pipeline scraper Download PDFInfo
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- CN106639983B CN106639983B CN201611081419.XA CN201611081419A CN106639983B CN 106639983 B CN106639983 B CN 106639983B CN 201611081419 A CN201611081419 A CN 201611081419A CN 106639983 B CN106639983 B CN 106639983B
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- positioning ring
- mandrel
- positive cover
- supporting positive
- spiral supporting
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Classifications
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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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
Abstract
The invention discloses a kind of reducing casing pipeline scrapers, upper spiral supporting positive cover, upper blade, midfoot support set, lower coating blade, lower spiral supporting positive cover, jointing and lower contact is arranged in mandrel, locking nut is set between lower contact and mandrel, and upper spiral supporting positive cover, midfoot support set and lower spiral supporting positive cover are connect by ball with mandrel；First spring, the first positioning ring and the first stop collar are set between upper spiral supporting positive cover and mandrel；Midfoot support set is vertically connected with the first limit sleeve and the second limit sleeve, and the second positioning ring, second spring, third spring and third positioning ring is arranged between midfoot support set and mandrel；Second stop collar, the 4th positioning ring and the 4th spring are set between lower spiral supporting positive cover and mandrel.The present invention can not only shorten pipe cleaning duty cycle, but also can ensure the safety of pipe cleaning operation, can preferably clean to residuals various in casing, be suitable for 9-5/8 " casing (40#-47#) and 7 " (23#-29#) casing.
Description
Technical field
The invention belongs to petroleum, natural gas completion technique field, more particularly, to a kind of reducing casing pipeline scraper.
Background technique
Basic job step of the pipe cleaning operation as completion phase has been to ensure that well subsequent job step was normally carried out
It is crucial.For casing programme as 9-5/8 " below protective casing hang 7 " tail pipe, when pipe cleaning operation, generally uses two kinds at present
Way, one is 9-5/8 " casing pipeline scraper and 7 " casing pipeline scraper to be connected on one-trip string, since 9-5/8 " covers above
The dirt that pipe pipeline scraper is scraped from casing wall can fall into lower part pit shaft, and below 7 " casing pipeline scraper exists by the wind of card
Danger.Another way is to scrape 9-5/8 above " casing using tubing string, one-trip string twice, and second time tubing string is scraped following
7 " tail pipe, this way pipeline scraper is small by the risk of card, but increases pipe cleaning duty cycle.
Summary of the invention
Purpose of the invention is to overcome the shortcomings in the prior art, provides a kind of reducing casing pipeline scraper, uses
A time pipe cleaning tubing string first cleans 9-5/8 above " casing, and then variable diameter is 7 " casing pipeline scraper cleans following 7 again " casings,
Pipe cleaning duty cycle can not only be shortened in this way, but also can ensure the safety of pipe cleaning operation, service efficiency is improved, mention to greatest extent
The large rock-carrying ability for flowing up body, can preferably clean residuals various in casing.
The purpose of the present invention is what is be achieved through the following technical solutions.
A kind of reducing casing pipeline scraper of the invention, including mandrel are from top to bottom disposed with outside the mandrel
Upper spiral supporting positive cover, upper blade, midfoot support set, lower coating blade, lower spiral supporting positive cover, jointing and lower contact, connect under described
Locking nut is provided between head and mandrel, the upper spiral supporting positive cover, midfoot support set and lower spiral supporting positive cover pass through rolling
Pearl connect with mandrel；
The first spring, the first positioning ring and first are from top to bottom disposed between the upper spiral supporting positive cover and mandrel
Stop collar；The midfoot support set upper and lower ends are connected separately with the first limit sleeve and the second limit sleeve, the midfoot support set
The second positioning ring, second spring, third spring and third positioning ring are from top to bottom disposed between mandrel；The lower spiral shell
The second stop collar, the 4th positioning ring and the 4th spring are from top to bottom disposed between rotation supporting positive cover and mandrel；It is scraped on described
The upper and lower ends of knife pass through plate spring sheet respectively and are fixedly connected with the first positioning ring and the second positioning ring, the upper and lower ends of the lower coating blade
Third positioning ring and the 4th positioning ring are fixedly connected with by plate spring sheet respectively, the upper blade and lower coating blade are circumferentially uniformly set
It sets.
The mandrel is provided with ball grooves, and the ball grooves inner surface is surface-treated through carbo-nitriding, the mandrel lower end
Outer surface is provided with circlip groove, and circlip is provided in the circlip groove, and the circlip is located at locking nut lower end.
The outer surface of the upper spiral supporting positive cover and lower spiral supporting positive cover is circumferentially provided with axial screw diversion trench, institute
State spiral supporting positive cover, lower spiral supporting positive cover and midfoot support set be provided with the one-to-one radial screw bore of ball grooves,
Screw plug and seal plug are provided in the threaded hole.
First positioning ring, the second positioning ring, third positioning ring and the 4th positioning ring pass through positioning screw and leaf spring
Piece is fixedly connected, and first positioning ring, the second positioning ring, third positioning ring and the 4th positioning ring are circumferentially provided with convex
Platform.
The upper blade is fixedly connected by fixing screws with spiral retaining ring with plate spring sheet, and the lower coating blade and plate spring sheet are logical
It crosses fixing screws to be fixedly connected with spiral retaining ring, the upper blade and lower coating blade pass through processing dovetail groove and determine with plate spring sheet realization
Position.
The plate spring sheet is made of using the double arch designs of waveform, the plate spring sheet both ends continuous circular arc, and middle part is machined with
Dovetail groove, the double arch bridge concave surfaces of dovetail groove both ends symmetric design.
Compared with prior art, the beneficial effects brought by the technical solution of the present invention are as follows:
(1) in the present invention, upper blade and lower coating blade are uniformly arranged along the circumference respectively, realize 360 ° of internal surface of sleeve pipe coverings,
Guarantee blade in compressive state simultaneously, is not in interference phenomenon；
(2) in the present invention, plate spring sheet is realized plate spring sheet radial direction big displacement function, is solved using the double arch designs of waveform
The problem of conventional pipeline scraper blade cannot achieve big variable diameter；
(3) in the present invention, mandrel, upper spiral supporting positive cover, lower spiral supporting positive cover, midfoot support set, ball and screw plug are constituted
Drag reduction mechanism when mandrel rotates, reduces mandrel and upper spiral supporting positive cover, midfoot support set, lower spiral shell by the rolling friction of ball
Revolve the frictional force between supporting positive cover；First spring, second spring, third spring, the 4th spring, the first stop collar, the second limit
Ring, the first limit sleeve, the second limit sleeve, the first positioning ring, the second positioning ring, third positioning ring, the 4th positioning ring and positioning spiral shell
Nail constitutes resetting-mechanism, is mainly used to push upper blade and lower coating blade normal reset；Plate spring sheet, upper blade, lower coating blade, fixed spiral shell
Nail and spiral retaining ring constitute scraping mechanism, are mainly used to clean internal surface of sleeve pipe；Lower contact, jointing, circlip and locking
Nut constitutes retaining mechanism, completes spindle moment transmitting, and have the function of preventing covering upside down；
(4) in the present invention, the outer surface of upper spiral supporting positive cover and lower spiral supporting positive cover has been uniformly arranged along the circumference axial direction
The end face of spiral stream guidance slot, upper spiral supporting positive cover and lower spiral supporting positive cover is all made of gradient end face, can increase unit time liquid
Flow；
(5) present invention is 95/8, and " upper blade and lower coating blade are tightly attached to internal surface of sleeve pipe, upper blade, lower coating blade installation in casing
After good, maximum original outer diameter is 260mm, in the external world under the action of pressure, plate spring sheet can radial big displacement shrink, leaf spring both ends exist
Under the guiding role of upper spiral supporting positive cover, midfoot support set and lower spiral supporting positive cover, axial displacement occurs, so that upper blade is under
Radial be constantly pressurized of scraper and shrink, pressure increase to it is certain when, scraper blade is completely retracted into 7 " casings；The present invention
Structure is simple, can shorten pipe cleaning duty cycle, and can ensure the safety of pipe cleaning operation；
(6) present invention not only can be applicable in conventional pipe cleaning operation technique, can also carry out drilling out operation with drill bit.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the partial enlarged view of part A in Fig. 1；
Fig. 3 is the partial enlarged view of part B in Fig. 1；
Fig. 4 is the partial enlarged view of C portion in Fig. 1；
Fig. 5 is the structural schematic diagram of upper spiral supporting positive cover/lower spiral supporting positive cover in the present invention；
Fig. 6 is upper blade/lower coating blade structural schematic diagram in the present invention；
Fig. 7 is the schematic diagram of the first positioning ring/second positioning ring/third positioning ring/the 4th positioning ring of the invention；
Fig. 8 is the schematic diagram of jointing in the present invention；
Fig. 9 is the structural schematic diagram of central axis of the present invention；
Figure 10 is the structural schematic diagram of locking nut in the present invention；
Figure 11 is the structural schematic diagram of plate spring sheet in the present invention.
Appended drawing reference: 1 mandrel；Spiral supporting positive cover on 2；3 midfoot support sets；4 lower spiral supporting positive covers；5 screw plugs；6 first limits
Position ring；7 second stop collars；8 first positioning rings；9 second positioning rings；10 third positioning rings；11 the 4th positioning rings；12 positioning spiral shells
Nail；13 plate spring sheets；14 upper blades；15 lower coating blades；16 first limit sleeves；17 lower contacts；18 jointings；19 circlips；20
Ball；21 seal plugs；22 spiral retaining rings；23 fixing screws；24 locking nuts；25 first springs；26 second springs；27 thirds
Spring；28 the 4th springs；29 second limit sleeves.
Specific embodiment
In order to further understand the content, features and effects of the present invention, hereby enumerating following instance, and cooperate attached drawing detailed
It describes in detail bright.
As shown in Figure 1 to 11, a kind of reducing casing pipeline scraper of the invention, including mandrel 1, outside the mandrel 1
From top to bottom be disposed with spiral supporting positive cover 2, upper blade 14, midfoot support set 3, lower coating blade 15, lower spiral supporting positive cover 4,
Jointing 18 and lower contact 17.The upper spiral supporting positive cover 2, midfoot support set 3 and lower spiral supporting positive cover 4 pass through ball 20
It being connect with mandrel 1,1 corresponding position of mandrel is provided with ball grooves, and the ball grooves inner surface is surface-treated through carbo-nitriding,
The upper spiral supporting positive cover 2, midfoot support set 3 and lower spiral supporting positive cover 4 are provided with and ball grooves radial spiral shell correspondingly
Pit is provided with screw plug 5 and seal plug 21 in the threaded hole.The upper spiral supporting positive cover 2 and lower spiral supporting positive cover 4 it is outer
Surface is uniformly arranged along the circumference the axial screw diversion trench that width is 30mm, the upper spiral supporting positive cover 2 and lower spiral respectively
The end face of supporting positive cover 4 is all made of 75 ° of High angle end faces.
The upper spiral supporting positive cover 2 descends internal partial wall to open up, and there are two annular groove, the upper spiral supporting positive cover 2 and mandrels
The first spring 25, the first positioning ring 8 and the first stop collar 6 are from top to bottom disposed between 1, first spring 25 is located at
In upper annular groove, first positioning ring 8 and the first stop collar position 6 are in lower annular groove.First positioning ring, 8 lower end
It is uniformly arranged along the circumference radial tapped through hole, upper end is provided with circumferential registration boss, and upper surface and the first spring meet 26 touchings company
It connects.First stop collar 6 has been uniformly arranged along the circumference axially extending bore, and outer surface is provided with screw thread, with upper 2 spiral shell of spiral supporting positive cover
Line connection, inner surface are set as smooth surface.
The midfoot support covers 3 upper and lower ends and is threaded with the first limit sleeve 16 and the second limit sleeve 29 respectively, described
Midfoot support covers 3 intermediate inner walls and is provided with annular convex platform, from top to bottom sets gradually between the midfoot support set 3 and mandrel 1
There are the second positioning ring 9, second spring 26, third spring 27 and third positioning ring 10, and the second spring 26 and third spring
27 are located at annular convex platform upper and lower ends.Second positioning ring, the 9 upper end edge even circumferential is provided with radial tapped through hole, under
End is provided with circumferential registration boss, and lower end surface and second spring 26 connect.10 lower end of third positioning ring is circumferentially equal
Even to be provided with radial tapped through hole, upper end is provided with circumferential registration boss, and upper surface and third spring 27 connect.
Internal partial wall is opened up there are two annular groove, the upper spiral supporting positive cover 4 and mandrel on the lower spiral supporting positive cover 4
From top to bottom it is disposed with the second stop collar 7, the 4th positioning ring 11 and the 4th spring 28 between 1, described 28,4th spring
In in lower annular groove, the 4th positioning ring 11 and the second stop collar 7 are located in upper annular groove.4th positioning ring 11
Upper end edge even circumferential is provided with radial tapped through hole, and lower end is provided with circumferential registration boss, and lower end surface connects with the 4th spring 28
Touching connection.Second stop collar 7 has been uniformly arranged along the circumference axially extending bore, and outer surface is provided with screw thread, with lower spiral righting
Set 4 is threadedly coupled, and inner surface is set as smooth surface.
The upper blade 14 and lower coating blade 15 are uniformly arranged along the circumference respectively, realize 360 ° of internal surface of sleeve pipe coverings, simultaneously
Guarantee blade in compressive state, be not in interference, each upper blade 14 and lower coating blade 15 are fixed by plate spring sheet 13, can
Realize radial big displacement.The upper blade 14 is fixedly connected by fixing screws 23 with spiral retaining ring 22 with plate spring sheet 13, described
Upper blade 14 realizes by processing dovetail groove and plate spring sheet 13 and positions that 13 upper end of plate spring sheet passes through the first stop collar 6, passes through
Positioning screw 12 is fixedly connected with the first positioning ring 8, and 13 lower end of plate spring sheet passes through the first limit sleeve 16, passes through positioning screw
12 are fixedly connected with the second positioning ring 9.The lower coating blade 15 and plate spring sheet 13 are fixed by fixing screws 23 and spiral retaining ring 22
Connection, the lower coating blade 15 realize by processing dovetail groove and plate spring sheet 13 and position that 13 upper end of plate spring sheet passes through the second limit
Position set 29, is fixedly connected by positioning screw 12 with third positioning ring 10, and 13 lower end of plate spring sheet passes through the second stop collar 7,
It is fixedly connected by positioning screw 12 with the 4th positioning ring 11.Pass through the first stop collar 6, the second stop collar 7, the first limit sleeve
16, the second limit sleeve 29 limits the position of positioning screw 12, realizes the positioning of plate spring sheet 13.
The plate spring sheet 13 utilizes simply supported beam design principle, using the double arch designs of waveform, both ends radial constraint, and upper and lower two
End is respectively arranged with tapped through hole, and both ends are reduced part to greatest extent and answered using the continuous circular arc composition of 13 groups of diameter 7.5mm
Power is concentrated, and by reducing contact surface, is significantly reduced the axial displacement frictional resistance of plate spring sheet 13, is machined with 75 ° of swallows in the middle part of plate spring sheet 13
Stern notch, the double arch bridge concave surfaces of dovetail groove both ends symmetric design, plate spring sheet 13 are pressurized, provide radial direction and have an effect, upper blade 14 and lower coating blade
15 scraping internal surface of sleeve pipe.
18 upper end of jointing is internally provided with sealing surface and box thread, and is machined with spline connection mandrel, institute
It states 18 lower end of jointing and is provided with male thread, connect by screw thread with lower contact 17, male thread and box thread are all made of drilling rod
The upper end of screw thread, 18 male thread of jointing and box thread is machined with seal groove respectively.The lower contact about 17 two
End is machined with drill rod thread respectively, and inside is machined with sealing surface.Locking nut is provided between the lower contact 17 and mandrel 1
24,24 upper end of locking nut is machined with trapezoidal box thread, and internal, external is smooth seal face, inner sealing face and mandrel 1
The cooperation of external seal face, external sealing surface and 17 inner sealing face of lower contact cooperate, and locking nut 24 and mandrel 1 are connected by screw thread
It connects.Three groups of screw threads are successively machined with outside the mandrel 1 from top to bottom, the first screw thread and the second screw thread are API drill rod thread, the
One screw thread is connected with drilling rod, and the second screw thread is connect with jointing 18, and bottom screw thread is trapezoidal thread, with this bimetallic tube
Outer connecting pipe is connected, and intermediate screw thread is trapezoidal thread, and lower end is equipped with circlip groove, and lower end is on from threaded top to circlip groove
End face is machined with sealing surface.Circlip 19 is provided in the circlip groove, and the circlip 19 is located at locking nut 24
Lower end, for preventing locking nut 24 to be buckled to.According to actual needs, 1 outer circle of mandrel is also provided with multiple groups seal groove,
It places and plays sealing function between O-ring or star-like circle, with each component.The effect of the mandrel 1 is that concatenation is each independent outer
Portion's unit is filled with each external unit completion group and meets operation technique requirement.
The mandrel 1, upper spiral supporting positive cover 2, lower spiral supporting positive cover 4, midfoot support set 3, ball 20 and screw plug 5 constitute this
The drag reduction mechanism of invention when mandrel 1 rotates, reduces mandrel 1 and upper spiral supporting positive cover 2, middle part by the rolling friction of ball 20
Frictional force between support sleeve 3, lower spiral supporting positive cover 4.First spring 25, second spring 26, third spring 27, the 4th bullet
Spring 28, the first stop collar 6, the second stop collar 7, the first limit sleeve 16, the second limit sleeve 29, the first positioning ring 8, the second positioning ring
9, third positioning ring 10, the 4th positioning ring 11 and positioning screw 12 constitute resetting-mechanism of the invention, are mainly used to push and scrape
15 normal reset of knife 14 and lower coating blade.The plate spring sheet 13, upper blade 14, lower coating blade 15, fixing screws 23 and spiral retaining ring 22
Scraping mechanism of the invention is constituted, is mainly used to clean internal surface of sleeve pipe.The lower contact 17, jointing 18, circlip 19
Retaining mechanism of the invention is constituted with locking nut 24, completes the transmitting of 1 torque of mandrel, and have the function of preventing covering upside down.
After multiple groups plate spring sheet 13 completes assembling, whole cutter frame structure is formed, upper spiral supporting positive cover 2 is packed into from 1 lower end of mandrel
To design position (screw plug hole face ball grooves), ball 20 is placed, screw plug 5 is installed, after drag reduction mechanism is installed, assembling resets
Mechanism successively installs the first spring 25, whole knife rest, the first stop collar 6 from top to bottom, realizes the fixation of whole knife rest, successively
Midfoot support is installed and covers 3, cutter holder assembly, lower spiral supporting positive cover 4.17 inner sealing face of lower contact and 24 external seal face of locking nut
Form sealing cooperation.After the upper blade 14, lower coating blade 15 install, maximum original outer diameter is 260mm, by adjusting compression
Amount, balanced upper blade 14, the lower coating blade 15 " damage of internal surface of sleeve pipe to 95/8 " casing and 7.
The course of work of the invention is as follows: pipeline scraper is first 95/8 " casing scraping, after enter 7 " casings.
Upper blade 14, lower coating blade 15,13 stress radial contraction of plate spring sheet, first positioning ring 8 of the connection promotion of positioning screw 12 of plate spring sheet 13,
Axial displacement occurs for the second positioning ring 9, third positioning ring 10 and the 4th positioning ring 11, and then pushes the first spring 25, the second bullet
Spring 26, third spring 27 and the 4th spring 28 are compressed axially, and 13 both ends of plate spring sheet cover 3 and in upper spiral supporting positive cover 2, midfoot support
Under the guiding role of lower spiral supporting positive cover 4, axial displacement occurs, so that upper blade 14 and 15 radial direction of lower coating blade are constantly pressurized and receive
Contracting, pressure increase to it is certain when, upper blade 14 and lower coating blade 15 shrink 7 " casing scrapings of progress.It is drilled into for one time
95/8 " casing and 7 " casing scraping.
During recycling pipe cleaning, both can direct circulation pipe cleaning, can also reacting cycle pipe cleaning.By taking direct circulation pipe cleaning as an example, well-flushing
Liquid is entered in pipeline scraper mandrel 1 by drilling rod, until shaft bottom, then helped by drilling rod casing annulus through lower spiral supporting positive cover 4, upper spiral
Positive set 2 returns out.Liquid flow path direction is opposite with reacting cycle pipe cleaning well-flushing when direct flushing.
Although function and the course of work of the invention are described above in conjunction with attached drawing, the invention is not limited to
Above-mentioned concrete function and the course of work, the above mentioned embodiment is only schematical, rather than restrictive, ability
The those of ordinary skill in domain under the inspiration of the present invention, is not departing from present inventive concept and scope of the claimed protection situation
Under, many forms can also be made, all of these belong to the protection of the present invention.
Claims (6)
1. a kind of reducing casing pipeline scraper, including mandrel (1), which is characterized in that outside the mandrel (1) from top to bottom successively
It is provided with spiral supporting positive cover (2), upper blade (14), midfoot support set (3), lower coating blade (15), lower spiral supporting positive cover (4), connects
Connector (18) and lower contact (17) are provided with locking nut (24), the upper spiral shell between the lower contact (17) and mandrel (1)
Rotation supporting positive cover (2), midfoot support set (3) and lower spiral supporting positive cover (4) are connect by ball (20) with mandrel (1)；
The first spring (25), the first positioning ring are from top to bottom disposed between the upper spiral supporting positive cover (2) and mandrel (1)
(8) and the first stop collar (6)；Midfoot support set (3) upper and lower ends are connected separately with the first limit sleeve (16) and the second limit
Position set (29), is from top to bottom disposed with the second positioning ring (9), the second bullet between the midfoot support set (3) and mandrel (1)
Spring (26), third spring (27) and third positioning ring (10)；Between the lower spiral supporting positive cover (4) and mandrel (1) from top to bottom
It is disposed with the second stop collar (7), the 4th positioning ring (11) and the 4th spring (28)；The upper and lower ends of the upper blade (14)
The first positioning ring (8) and the second positioning ring (9) are fixedly connected with by plate spring sheet (13) respectively, up and down the two of the lower coating blade (15)
End is fixedly connected with third positioning ring (10) and the 4th positioning ring (11) by plate spring sheet (13) respectively, the upper blade (14) and under
Scraper (15) is uniformly arranged along the circumference.
2. a kind of reducing casing pipeline scraper according to claim 1, which is characterized in that the mandrel (1) is provided with rolling
Pearl slot, the ball grooves inner surface are surface-treated through carbo-nitriding, and mandrel (1) the lower end outer surface is provided with circlip groove, institute
It states and is provided in circlip groove circlip (19), the circlip (19) is located at locking nut (24) lower end.
3. a kind of reducing casing pipeline scraper according to claim 1 or 2, which is characterized in that the upper spiral supporting positive cover
(2) and the outer surface of lower spiral supporting positive cover (4) is circumferentially provided with axial screw diversion trench, the upper spiral supporting positive cover (2),
Lower spiral supporting positive cover (4) and midfoot support set (3) are provided with and the one-to-one radial screw bore of ball grooves, the threaded hole
Inside it is provided with screw plug (5) and seal plug (21).
4. a kind of reducing casing pipeline scraper according to claim 1, which is characterized in that first positioning ring (8),
Two positioning rings (9), third positioning ring (10) and the 4th positioning ring (11) are fixed by positioning screw (12) and plate spring sheet (13)
Connection, first positioning ring (8), the second positioning ring (9), third positioning ring (10) and the 4th positioning ring (11) are circumferentially arranged
There is positioning convex platform.
5. a kind of reducing casing pipeline scraper according to claim 1, which is characterized in that the upper blade (14) and leaf spring
Piece (13) is fixedly connected by fixing screws (23) with spiral retaining ring (22), and the lower coating blade (15) and plate spring sheet (13) pass through admittedly
Determine screw (23) to be fixedly connected with spiral retaining ring (22), the upper blade (14) and lower coating blade (15) by processing dovetail groove with
Plate spring sheet (13) realizes positioning.
6. a kind of reducing casing pipeline scraper according to claim 1, which is characterized in that the plate spring sheet (13) uses wave
The double arch designs of shape, plate spring sheet (13) both ends are made of continuous circular arc, and middle part is machined with dovetail groove, and dovetail groove both ends are symmetrical
Design double arch bridge concave surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611081419.XA CN106639983B (en) | 2016-11-30 | 2016-11-30 | A kind of reducing casing pipeline scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611081419.XA CN106639983B (en) | 2016-11-30 | 2016-11-30 | A kind of reducing casing pipeline scraper |
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| Publication Number | Publication Date |
|---|---|
| CN106639983A CN106639983A (en) | 2017-05-10 |
| CN106639983B true CN106639983B (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611081419.XA Active CN106639983B (en) | 2016-11-30 | 2016-11-30 | A kind of reducing casing pipeline scraper |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108104771B (en) * | 2017-12-07 | 2020-07-03 | 中国海洋石油集团有限公司 | Large reducing sleeve cleaning tool |
| CN110847860A (en) * | 2019-12-04 | 2020-02-28 | 贵州高峰石油机械股份有限公司 | Casing pipe scraper |
| CN110984914A (en) * | 2019-12-19 | 2020-04-10 | 牡丹江天庆石油机械设备有限公司 | Oil field sleeve paraffin scraping tool |
| CN113323630B (en) * | 2020-02-28 | 2023-01-31 | 中国石油化工股份有限公司 | Reducing casing scraper |
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| CN104594853A (en) * | 2014-12-23 | 2015-05-06 | 牡丹江市林海石油打捞工具有限公司 | Rotary type casing pipe scrapper and scrapping method |
| CN204804774U (en) * | 2015-06-12 | 2015-11-25 | 牡丹江长城油气钻采工具有限公司 | Sleeve pipe pipeline scraper |
| CN205654324U (en) * | 2016-05-30 | 2016-10-19 | 中石化石油工程技术服务有限公司 | Sleeve pipe pipeline scraper |
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| CN106639983A (en) | 2017-05-10 |
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