CN107201889A - A kind of casing scraper - Google Patents
A kind of casing scraper Download PDFInfo
- Publication number
- CN107201889A CN107201889A CN201710458864.1A CN201710458864A CN107201889A CN 107201889 A CN107201889 A CN 107201889A CN 201710458864 A CN201710458864 A CN 201710458864A CN 107201889 A CN107201889 A CN 107201889A
- Authority
- CN
- China
- Prior art keywords
- jointing
- lower contact
- scraper
- top connection
- doctor blade
- 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
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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)
- Cleaning In General (AREA)
Abstract
A kind of casing scraper, the middle inside of top connection and the outer upper end of body are fixed together；The middle inside of lower contact and the outside lower end of body are fixed together；The pipe cleaning of energy radial contraction is set with body between top connection and lower contact, there is scraping teeth on pipe cleaning；Pipe cleaning includes upper jointing, lower jointing, elastic doctor blade；The elastic doctor blade of at least two circle distributions and energy axial stretching is fixedly connected between upper jointing and lower jointing, elastic doctor blade is in the low arch in the high both sides in middle part, the present invention is provided with casing scraper retaining connector, when using, scraper top is by being threadably mounted at the bottom of lower contact, during reciprocal scraping and a lower tubular column, when tubing string is inverted, the first lower contact idle running of scraper is installed, threaded connection between first lower contact and scraper will not loosen, scraper is avoided to come off in use, the down-hole accident for preventing scraper dropout to fall well and cause.
Description
Technical field
It is a kind of casing scraper the present invention relates to casing scraper technical field.
Background technology
Oil gas well cementing operation is bored after ash disposal plug, and ash plug section internal surface of sleeve pipe generally has cement residual, causes this section of internal surface of sleeve pipe not
Smooth regular, is adversely affected to follow-up completion practice；When other bridging plug lower in certain section of sleeve pipe or progress staged fracturing,
It is also required to carry out scraping cleaning operation to the inwall of operation casing section, this is accomplished by using scraper in a kind of sleeve pipe, common
Casing scraper has rubber tube scraper and spring scraper, and Conventional springs formula scraper is typically all to have bullet using several
The odontexesis of spring support carries out scraping to internal surface of sleeve pipe, but the odontexesis external diameter of the spring scraper of same model is fixed, nothing
How to be compressed by spring, the scraper of the type can only can just scrape whole for the casing inner diameter equal with its odontexesis external diameter
Circle, poor universality；The odontexesis of the scraper can not scrape the circle of a completion all the time simultaneously, when this results in actual scraping,
What is formed is a kind of line scraping, makes internal surface of sleeve pipe scraping not thorough.
In addition, in oilfield process, fouling, burr of internal surface of sleeve pipe etc. must repeatedly be scraped with scraper
Cleaning is cut, to reach that internal surface of sleeve pipe is smooth.Because existing pipeline scraper top connection outer surface is trapezoid buckle, it is connected with scraper
Afterwards, easily release.Blade is close to internal surface of sleeve pipe after going into the well, during reciprocal scraping and lift pipe string, and the reversal development of tubing string holds
Screw thread loosening is easily caused, causes scraper to take off mouth and falls well, cause the accident.Scraper falls to be difficult to salvage after well.
So being necessary to provide a kind of with novelty and creativeness for a variety of weak points present in prior art
Device.
The content of the invention
The purpose of the present invention, the invention provides a kind of casing scraper, overcomes for shortcoming present in prior art
The deficiency of above-mentioned prior art, it can effectively solve spring scraper poor universality, scraping halfway problem, except this it
Outside, it is to avoid scraper comes off in use.
Described sleeve pipe scraper, including top connection, body, pipe cleaning and lower contact；The middle inside of top connection and body
Outer upper end is fixed together；The middle inside of lower contact and the outside lower end of body are fixed together；Connect upper
The pipe cleaning of energy radial contraction is set with body between head and lower contact, there is scraping teeth on pipe cleaning；Pipe cleaning includes upper connect
Head, lower jointing, elastic doctor blade；At least two circle distributions are fixedly connected between upper jointing and lower jointing
And can axial stretching elastic doctor blade, elastic doctor blade in the low arch in the high both sides in middle part, have in the middle part of elastic doctor blade direction to
Under scraping teeth；Upper jointing links together with the body below top connection；Lower jointing and the sheet above lower contact
Body links together；The upper end of described sleeve pipe scraper is connected with casing scraper retaining connector, described sleeve pipe scraper anticreep
Joint includes the first top connection, and the top of intermediate connecting sleeve is located at the inner side of top connection bottom and linked together with top connection,
The top of first lower contact of tubular, which is located in the middle part of the inner side of intermediate connecting sleeve and top connection, lower contact, the first latch, in
Between the lower end of adapter sleeve have the second latch corresponding with the first latch, external screw thread is arranged at the bottom of lower contact, and lower contact upper end is fixed
There is baffle ring.
Preferably, the elastic doctor blade is spaced in the shape of a spiral is fixed between jointing and lower jointing.
In particularly preferred embodiment, the scraping teeth is annular in shape.
In particularly preferred embodiment, eight circumference are fixedly connected with institute's data between jointing and lower jointing
The elastic doctor blade of distribution.
In particularly preferred embodiment, annular is formed between body respectively at the bottom of top connection and the top of lower contact
Upper cavity and lower chamber；Upper jointing is arranged in the bottom of upper cavity, and lower jointing is arranged in the top of lower chamber；
There is vertical elongated hole respectively on upper jointing and lower jointing, divide on the body corresponding with the bottom of each vertical elongated hole
There is not positioning hole, upper jointing is by vertical elongated hole, positioning hole and stops that pin and body are fixed together；Lower connection
Joint is by vertical elongated hole, positioning hole and stops that pin and body are fixed together.
In particularly preferred embodiment, the middle inside of top connection and the outer upper end of body are threadably secured and are connected to
Together and it is installed with check pin；The middle inside of lower contact and the outside lower end of body are threadably secured and are connected to one
Rise and be installed with check pin.
In particularly preferred embodiment, the middle inside of top connection and the outer upper end of body are threadably secured and are connected to
Together and it is installed with check pin；The middle inside of lower contact and the outside lower end of body are threadably secured and are connected to one
Rise and be installed with check pin.
In particularly preferred embodiment, the middle inside of top connection and the outer upper end of body are threadably secured and are connected to
Together and it is installed with check pin；The middle inside of lower contact and the outside lower end of body are threadably secured and are connected to one
Rise and be installed with check pin.
In particularly preferred embodiment, conical internal thread is arranged at the top of top connection, has spiral shell in taper in the bottom of lower contact
Line.
In particularly preferred embodiment, first top connection has tapped cylindrical form.
Compared with prior art, the advantage of the invention is that：
Reasonable and compact in structure, it is easy to use；By the axial elongation of elastic doctor blade, make the external diameter contracting at the middle part of elastic doctor blade
It is small, so as to the scraping of the sleeve pipe suitable for different inner diameters, highly versatile；There is annular on the outside of the middle part of elastic doctor blade simultaneously
And the scraping teeth being directed downward, the scraping of annular can be carried out to internal surface of sleeve pipe, makes the effect of scraping more preferable.
The present invention is provided with casing scraper retaining connector, in use, scraper top is by being threadably mounted at lower contact
Bottom, reciprocal scraping and rise lower tubular column during, when tubing string invert, install scraper lower contact dally, lower contact
Threaded connection between scraper will not be loosened, it is to avoid scraper comes off in use, it is therefore prevented that scraper is threaded off
The down-hole accident for falling well and causing, scraping, which is finished, can safely play out pit shaft.Job scheduling is accelerated, operating cost is reduced.
Brief description of the drawings
Accompanying drawing 1 is the structural representation of the present invention；
Accompanying drawing 2 is the main structure diagram of pipe cleaning in accompanying drawing 1；
Accompanying drawing 3 is the overlooking the structure diagram of the elastic doctor blade of accompanying drawing 2；
Accompanying drawing 4 is overlooking the structure diagram of the elastic doctor blade of accompanying drawing 4 in radial contraction.
Specific embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing 1,2,3,4, and
Embodiment, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only to explain
The present invention, is not intended to limit the present invention.
As shown in attached Fig. 1 and 2, the screw type sleeve scrapping device includes top connection 1, body 2, pipe cleaning and lower contact 3；On
The middle inside of joint 1 and the outer upper end of body 2 are fixed together；The middle inside of lower contact 3 and body 2
Outside lower end is fixed together；Scraping for energy radial contraction is set with body 2 between top connection 1 and lower contact 3
Pipe, there is scraping teeth 4 on pipe cleaning.By scraping teeth 4 to internal surface of sleeve pipe carry out scraping, pipe cleaning again can radial contraction, within the specific limits
It is applicable to the sleeve pipe of different inner diameters, highly versatile.
Above-mentioned screw type sleeve scrapping device can be made further optimization and/or improvements according to actual needs：
As shown in accompanying drawing 2,3,4, pipe cleaning includes upper jointing 5, lower jointing 6, elastic doctor blade 7；In upper jointing 5
The elastic doctor blade 7 of at least two circle distributions and energy axial stretching, elastic doctor blade 7 are fixedly connected between lower jointing 6
In the low arch in the high both sides in middle part, there is the downward scraping teeth 4 in direction at the middle part of elastic doctor blade 7；Upper jointing 5 is with above connecing
The body 2 of first 1 lower section links together；Lower jointing 6 and the body 2 of the top of lower contact 3 link together.Pass through
Change the axial length of elastic doctor blade 7, elastic doctor blade 7 is reached the effect of radial contraction.
As shown in accompanying drawing 2,3, elastic doctor blade 7 is spaced is fixed on jointing 5 and lower jointing 6 in the shape of a spiral
Between.As shown in accompanying drawing 3,4, scraping teeth 4 is annular in shape.So make the scraping to internal surface of sleeve pipe more thorough.As shown in accompanying drawing 3,4,
The elastic doctor blade 7 of eight circle distributions is fixedly connected between upper jointing 5 and lower jointing 6.
As shown in accompanying drawing 2, annular is formed between body 2 respectively in the bottom of top connection 1 and the top of lower contact 3
Upper cavity 8 and lower chamber 9；Upper jointing 5 is arranged in the bottom of upper cavity 8, and lower jointing 6 is arranged on down
In the top of cavity 9；There is vertical elongated hole 10 respectively on upper jointing 5 and lower jointing 6, with each vertical elongated hole
There is positioning hole respectively on the corresponding body 2 in 10 bottom, upper jointing 5 passes through vertical elongated hole 10, positioning hole and stop
Pin 1 is fixed together with body 2；Lower jointing 6 by vertical elongated hole 10, positioning hole and stop pin 11 with
Body 2 is fixed together.Pipe cleaning can so be carried out by upper cavity 8 and lower chamber 9 radially spacing；Lead to simultaneously
Jointing 5 is overregulated with vertical elongated hole 10 on lower jointing 6 with stopping that the link position of pin 11 carrys out regulation elasticity
The length of scraping blade 7；Stop that pin 11 limits its and is axially moved distance simultaneously, be unlikely to make jointing 5 and lower connect
First 6 come off out of upper cavity 8 and lower chamber 9.
As shown in Figure 2, the middle inside of top connection 1 and the outer upper end of body 2 are threadably secured and are connected to one
Rise and be installed with check pin 12；The middle inside of lower contact 3 is threadably secured company with the outside lower end of body 2
It is connected together and is installed with check pin 12.So it is easy to the installation and removal of top connection 1 and lower contact 3.
As shown in Figure 2, there is conical internal thread on the top of top connection 1, have spiral shell in taper in the bottom of lower contact 3
Line.So it is easy to the present invention to be connected with other devices.
With reference to accompanying drawing 1, the upper end of casing scraper of the present invention is provided with casing scraper retaining connector, and it has band internal thread
Tubular the first top connection 24, the top of intermediate connecting sleeve 22 is located at the inner side of top connection bottom and is connected to one with top connection
Rise, the top of the first lower contact 21 of tubular, which is located in the middle part of the inner side of intermediate connecting sleeve and top connection, lower contact, the first card
There is the second latch 25 corresponding with the first latch the lower end of the intermediate connecting sleeve of tooth 26, and external screw thread, lower contact are arranged at the bottom of lower contact
Upper end is fixed with baffle ring 23.
The second latch corresponding with the first latch refers to that shape, the size of the second latch are corresponding with the first latch, make two
Person can be with plug-in card together.
In use, working string is linked together by screw thread with top connection, scraper top is by being threadably mounted at down
The bottom of joint.Scraper and the joint of the present invention are driven in tripping in sleeve pipe by working string, and the scraping for carrying out internal surface of sleeve pipe is made
Industry.When working string is descending, the first latch drives scraper to rotate together with the second latch plug-in card, carries out scraping.
When being carried under working string, in the presence of lower contact, scraper deadweight, the first latch is separated with the second latch, and baffle ring is stuck in
The upper end of intermediate connecting sleeve.When reversal development occurs in working string, lower contact idle running is not interfered between scraper and lower contact
Threaded connection, scraper will not fall off.
Compared with prior art, the advantage of the invention is that：
Reasonable and compact in structure, it is easy to use；By the axial elongation of elastic doctor blade, make the external diameter contracting at the middle part of elastic doctor blade
It is small, so as to the scraping of the sleeve pipe suitable for different inner diameters, highly versatile；There is annular on the outside of the middle part of elastic doctor blade simultaneously
And the scraping teeth being directed downward, the scraping of annular can be carried out to internal surface of sleeve pipe, makes the effect of scraping more preferable.
The present invention is provided with casing scraper retaining connector, in use, scraper top is by being threadably mounted at lower contact
Bottom, reciprocal scraping and rise lower tubular column during, when tubing string invert, install scraper lower contact dally, lower contact
Threaded connection between scraper will not be loosened, it is to avoid scraper comes off in use, it is therefore prevented that scraper is threaded off
The down-hole accident for falling well and causing, scraping, which is finished, can safely play out pit shaft.Job scheduling is accelerated, operating cost is reduced.
In the description of the invention, it is to be understood that term " one end ", " front upper place ", " end ", " length ", " width
Degree ", " interior ", " on ", " other end ", " two ends ", " level ", " coaxial ", " bottom ", the orientation of the instruction such as " lower section " or position pass
It is to be described based on orientation shown in the drawings or position relationship, to be for only for ease of the description present invention and simplifying, rather than indicates
Or imply that the device or element of meaning must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For limitation of the present invention.
In the present invention, unless otherwise clearly defined and limited, term " setting ", " engagement ", " connection ", " setting-in ",
Terms such as " cover lids " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be with
It is mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the common of this area
For technical staff, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize
The equivalent structure transformation that present specification is made, or directly or indirectly with the technology neck for being attached to other Related products
Domain, is included within the scope of the present invention.
Claims (10)
1. a kind of casing scraper, it is characterised in that including top connection, body, pipe cleaning and lower contact；The middle inside of top connection
It is fixed together with the outer upper end of body；The middle inside of lower contact and the outside lower end of body are fixedly connected on one
Rise；The pipe cleaning of energy radial contraction is set with body between top connection and lower contact, there is scraping teeth on pipe cleaning；Pipe cleaning includes
Upper jointing, lower jointing, elastic doctor blade；At least two are fixedly connected between upper jointing and lower jointing
The elastic doctor blade of circle distribution and energy axial stretching, elastic doctor blade is in the low arch in the high both sides in middle part, at the middle part of elastic doctor blade
There is the scraping teeth that direction is downward；Upper jointing links together with the body below top connection；Lower jointing and lower contact
The body of top links together；The upper end of described sleeve pipe scraper is connected with casing scraper retaining connector, and described sleeve pipe is scraped
Cutting device retaining connector includes the first top connection, and the top of intermediate connecting sleeve is located at the inner side of top connection bottom and is connected with top connection
Together, the top of the first lower contact of tubular, which is located in the middle part of the inner side of intermediate connecting sleeve and top connection, lower contact, first
There is the second latch corresponding with the first latch latch, the lower end of intermediate connecting sleeve, and the bottom of lower contact has in external screw thread, lower contact
End is fixed with baffle ring.
2. a kind of casing scraper as claimed in claim 1, it is characterised in that：The elastic doctor blade is spaced fixation in the shape of a spiral
Between upper jointing and lower jointing.
3. a kind of casing scraper as claimed in claim 1, it is characterised in that：The scraping teeth is annular in shape.
4. a kind of casing scraper as claimed in claim 1, it is characterised in that：Jointing and lower jointing in institute's data
Between be fixedly connected with the elastic doctor blades of eight circle distributions.
5. a kind of casing scraper as claimed in claim 1, it is characterised in that：The bottom of top connection and the upper part of lower contact
The upper cavity and lower chamber of annular are not formed between body；Upper jointing is arranged in the bottom of upper cavity, lower to connect
Head is arranged in the top of lower chamber；There is vertical elongated hole respectively on upper jointing and lower jointing, with each vertical length
Have positioning hole on the corresponding body in the bottom in hole respectively, upper jointing by vertical elongated hole, positioning hole and stop pin with
Body is fixed together；Lower jointing is by vertical elongated hole, positioning hole and stops that pin and body are fixedly connected on one
Rise.
6. a kind of casing scraper as claimed in claim 1, it is characterised in that：The middle inside of top connection and the outside of body
Upper end, which is threadably secured, links together and is installed with check pin；Under the middle inside of lower contact and the outside of body
End, which is threadably secured, links together and is installed with check pin.
7. a kind of casing scraper as claimed in claim 1, it is characterised in that：The middle inside of top connection and the outside of body
Upper end, which is threadably secured, links together and is installed with check pin；Under the middle inside of lower contact and the outside of body
End, which is threadably secured, links together and is installed with check pin.
8. a kind of casing scraper as claimed in claim 1, it is characterised in that：The middle inside of top connection and the outside of body
Upper end, which is threadably secured, links together and is installed with check pin；Under the middle inside of lower contact and the outside of body
End, which is threadably secured, links together and is installed with check pin.
9. a kind of casing scraper as claimed in claim 1, it is characterised in that：Conical internal thread is arranged at the top of top connection,
Conical internal thread is arranged at the bottom of lower contact.
10. a kind of casing scraper as claimed in claim 1, it is characterised in that：First top connection has band internal thread
Cylindrical form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710458864.1A CN107201889A (en) | 2017-06-16 | 2017-06-16 | A kind of casing scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710458864.1A CN107201889A (en) | 2017-06-16 | 2017-06-16 | A kind of casing scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107201889A true CN107201889A (en) | 2017-09-26 |
Family
ID=59907527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710458864.1A Pending CN107201889A (en) | 2017-06-16 | 2017-06-16 | A kind of casing scraper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107201889A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110894780A (en) * | 2018-09-13 | 2020-03-20 | 中国石油化工股份有限公司 | Self-rotating scraping casing pipe processor for oil-water well workover |
| 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 |
| CN111963107A (en) * | 2020-09-23 | 2020-11-20 | 中国石油天然气集团有限公司 | Efficient bailing cup for casing pipe scraping operation and casing pipe scraping operation device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010022223A1 (en) * | 2000-02-10 | 2001-09-20 | Howlett Paul David | Downhole cleaning tool with shear clutch |
| CN102330544A (en) * | 2011-10-13 | 2012-01-25 | 中国石油集团西部钻探工程有限公司 | Spiral casing scraper |
| 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 |
| CN205349245U (en) * | 2015-12-16 | 2016-06-29 | 辛广峰 | Sleeve pipe scraper anticreep connects |
-
2017
- 2017-06-16 CN CN201710458864.1A patent/CN107201889A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010022223A1 (en) * | 2000-02-10 | 2001-09-20 | Howlett Paul David | Downhole cleaning tool with shear clutch |
| CN102330544A (en) * | 2011-10-13 | 2012-01-25 | 中国石油集团西部钻探工程有限公司 | Spiral casing scraper |
| 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 |
| CN205349245U (en) * | 2015-12-16 | 2016-06-29 | 辛广峰 | Sleeve pipe scraper anticreep connects |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110894780A (en) * | 2018-09-13 | 2020-03-20 | 中国石油化工股份有限公司 | Self-rotating scraping casing pipe processor for oil-water well workover |
| 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 |
| CN111963107A (en) * | 2020-09-23 | 2020-11-20 | 中国石油天然气集团有限公司 | Efficient bailing cup for casing pipe scraping operation and casing pipe scraping operation device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20170926 |