US20110168383A1 - Cleaning Device - Google Patents
Cleaning Device Download PDFInfo
- Publication number
- US20110168383A1 US20110168383A1 US12/684,917 US68491710A US2011168383A1 US 20110168383 A1 US20110168383 A1 US 20110168383A1 US 68491710 A US68491710 A US 68491710A US 2011168383 A1 US2011168383 A1 US 2011168383A1
- Authority
- US
- United States
- Prior art keywords
- cleaning
- cleaning device
- radially
- support ring
- tool mandrel
- 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.)
- Abandoned
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Classifications
-
- 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
Definitions
- the invention relates generally to systems and methods for cleaning the interior of tubular members.
- the invention relates to methods and devices for scraping wellbore casing.
- Wellbore cleaning devices include casing scrapers and brushing devices. These mechanisms are used to remove mud, cement sheath, perforation burrs, rust, scale, paraffin, and other debris from the internal surface of wellbore casing.
- the casing scraper or brush is typically attached to a drill string for operation. The drill string and cleaning device are then disposed within the casing members to be scraped, and rotated.
- Typical casing scrapers include a central scraping body and one or more scraping blades that extend radially outwardly therefrom.
- Conventional casing scrapers generally fall into one of two categories: rotating and non-rotating. With a rotating scraper, the scraping body and the scraping blades are securely affixed to each other so that both rotate with the drill string. In applications where the drill string is rotated for long periods of time, rotating scrapers can cause serious wear and damage to the interior surface of casing. With a non-rotating scraper, only the scraping body rotates with the drill string. The scraper blades are not affixed to the central scraping body, but are urged radially outwardly from it by compression springs in order to provide a force for removal of debris. An example of this type of arrangement is found in U.S. Pat. No. 7,311,141 issued to Tulloch et al.
- the invention provides methods and devices for cleaning the interior of tubular members, such as casing members.
- Exemplary non-rotating tubular cleaning devices are described which include a unitary central tool mandrel with a surrounding retainer sleeve which a sleeve body with one or more windows disposed laterally through the body.
- the exemplary cleaning devices also include one or more cleaning members, such as scraper blades. A working portion of each cleaning member extends from the radial interior of the retainer sleeve through a window and radially outside of the retainer sleeve.
- scraper devices in accordance with the present invention permit these tools to have improved strength and resistance to axial and torsional forces within the work string within which the scraper device is used.
- the threaded connection of the tool mandrel to other components in a tool string largely governs the strength of the tool overall.
- FIG. 1 is a side, cross-sectional view of an exemplary scraper device constructed in accordance with the present invention.
- FIG. 3 is an enlarged side, one-quarter cross-sectional view of the scraper device shown in FIG. 1 .
- FIG. 4 is an external, isometric view of cleaning members and an exemplary support ring used in the scraper device shown in FIGS. 1-3 .
- FIGS. 1-4 illustrate an exemplary wellbore scraper device 10 that is constructed in accordance with the present invention.
- the scraper device 10 is useful for incorporation into a wellbore work string and disposed within a wellbore, as is known in the art.
- the scraper device 10 includes a generally cylindrical tool mandrel, generally indicated at 12 .
- the tool mandrel 12 defines a central flowbore 14 along its length.
- the upper end of the tool mandrel 12 preferably includes a box-type threaded connection 16 so that the scraper device 10 may be secured to other portions of a wellbore work string (not shown).
- the lower end of the tool mandrel 12 includes a pin-type threaded connection 18 .
- the tool mandrel 12 is made up of an upper sub 19 and a lower sub 20 which are affixed together by a threaded connection 22 .
- the tool mandrel 12 presents an outer radial surface 24 having a number of different diameter portions.
- a retainer sleeve 32 radially surrounds the tool mandrel 12 .
- the retainer sleeve 32 has a generally cylindrically-shaped body 34 and presents a number of windows 36 disposed through the sleeve body 34 .
- a cleaning member support ring 38 is disposed around the reduced-diameter portion 28 of the tool mandrel 12 and located inside of the retainer sleeve 32 .
- An exemplary support ring 38 is depicted apart from the other components of the scraper device 10 in FIG. 4 .
- the support ring 38 includes a generally annular ring body 40 having an axial separation 42 along its length from end-to-end (see FIG. 4 ) in the manner of a C-ring.
- the ring body 40 presents a radially outward surface 44 from which a plurality of cleaning members in the form of scraper blades 46 project.
- the scraper blades 46 may be components that are separate from the ring body 40 or, alternatively, they may be affixed to or integrally formed with the ring body 40 . As best seen in FIG. 3 , each of the scraper blades 46 include an enlarged base portion 45 and a working portion 47 that extends radially outwardly from the base portion 45 . In this embodiment, a single support ring 38 supports and biases a plurality of scraper blades 46 outwardly.
- stabilizers 50 , 52 are also disposed radially around the tool mandrel 12 .
- the stabilizers 50 , 52 function to centralize the scraper device 10 within a surrounding wellbore during operation.
- the stabilizers 50 , 52 are rotatable upon the tool mandrel 12 by virtue of bearings 54 which are disposed between the stabilizers and the mandrel 12 .
- Annular needle-type roller bearings may be used or other suitable bearings, such as full-compliment roller bearings or bushings.
- FIG. 6 depicts an alternative scraper device 10 ′ which is also constructed in accordance with the present invention.
- the scraper device 10 ′ is constructed in the same manner as the cleaning device 10 except where otherwise indicated.
- each of the scraper blades 46 is urged against the interior surface 48 of the retainer sleeve 32 by multiple support rings 38 a , 38 b and 38 c , each having a C-ring configuration.
- brushes, magnets or other cleaning members might be used in place of scraper blades to create a cleaning device in accordance with the present invention. It can be seen that the present invention provides a cleaning device that is useful for cleaning tubular members and wellbores that are often used in subterranean fluid production, such as the production of hydrocarbons.
Abstract
A cleaning device for use in subterranean fluid production which includes a tool mandrel and a retaining sleeve surrounding the tool mandrel. One or more C-ring-style support rings are used to support and bias cleaning members, such as scraper blades, into contact with the interior radial surface of a retaining sleeve.
Description
- 1. Field of the Invention
- The invention relates generally to systems and methods for cleaning the interior of tubular members. In particular aspects, the invention relates to methods and devices for scraping wellbore casing.
- 2. Description of the Related Art
- Wellbore cleaning devices include casing scrapers and brushing devices. These mechanisms are used to remove mud, cement sheath, perforation burrs, rust, scale, paraffin, and other debris from the internal surface of wellbore casing. The casing scraper or brush is typically attached to a drill string for operation. The drill string and cleaning device are then disposed within the casing members to be scraped, and rotated.
- Typical casing scrapers include a central scraping body and one or more scraping blades that extend radially outwardly therefrom. Conventional casing scrapers generally fall into one of two categories: rotating and non-rotating. With a rotating scraper, the scraping body and the scraping blades are securely affixed to each other so that both rotate with the drill string. In applications where the drill string is rotated for long periods of time, rotating scrapers can cause serious wear and damage to the interior surface of casing. With a non-rotating scraper, only the scraping body rotates with the drill string. The scraper blades are not affixed to the central scraping body, but are urged radially outwardly from it by compression springs in order to provide a force for removal of debris. An example of this type of arrangement is found in U.S. Pat. No. 7,311,141 issued to Tulloch et al.
- The invention provides methods and devices for cleaning the interior of tubular members, such as casing members. Exemplary non-rotating tubular cleaning devices are described which include a unitary central tool mandrel with a surrounding retainer sleeve which a sleeve body with one or more windows disposed laterally through the body. The exemplary cleaning devices also include one or more cleaning members, such as scraper blades. A working portion of each cleaning member extends from the radial interior of the retainer sleeve through a window and radially outside of the retainer sleeve.
- At least one annular support member with an axial separation, i.e., a C-ring, is disposed radially within the retainer sleeve and supports the one or more cleaning members outwardly against the interior radial surface of the retainer sleeve. The C-ring support ring preferably has a shape memory that causes the C-ring cleaning member support ring to bias the cleaning member against the interior radial surface of the retainer sleeve. During operation, if the cleaning member contacts an obstruction in a surrounding wellbore, the support ring can deflect inwardly due to the axial separation.
- The construction of scraper devices in accordance with the present invention permit these tools to have improved strength and resistance to axial and torsional forces within the work string within which the scraper device is used. The threaded connection of the tool mandrel to other components in a tool string largely governs the strength of the tool overall.
- The advantages and further aspects of the invention will be readily appreciated by those of ordinary skill in the art as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference characters designate like or similar elements throughout the several figures of the drawing and wherein:
-
FIG. 1 is a side, cross-sectional view of an exemplary scraper device constructed in accordance with the present invention. -
FIG. 2 is a view of the retaining sleeve, cleaning members and support ring portions of the scraper device, shown in an “unrolled” fashion. -
FIG. 3 is an enlarged side, one-quarter cross-sectional view of the scraper device shown inFIG. 1 . -
FIG. 4 is an external, isometric view of cleaning members and an exemplary support ring used in the scraper device shown inFIGS. 1-3 . -
FIG. 5 is an axial cross-sectional view taken along lines 5-5 inFIG. 1 and illustrating radial inward retraction of the support ring. -
FIG. 6 is a side, one-quarter cross-sectional view of an alternative embodiment for a scraper device constructed in accordance with the present invention. -
FIGS. 1-4 illustrate an exemplarywellbore scraper device 10 that is constructed in accordance with the present invention. Thescraper device 10 is useful for incorporation into a wellbore work string and disposed within a wellbore, as is known in the art. Thescraper device 10 includes a generally cylindrical tool mandrel, generally indicated at 12. Thetool mandrel 12 defines acentral flowbore 14 along its length. The upper end of thetool mandrel 12 preferably includes a box-type threadedconnection 16 so that thescraper device 10 may be secured to other portions of a wellbore work string (not shown). The lower end of thetool mandrel 12 includes a pin-type threadedconnection 18. - Preferably, the
tool mandrel 12 is made up of anupper sub 19 and alower sub 20 which are affixed together by a threadedconnection 22. Thetool mandrel 12 presents an outerradial surface 24 having a number of different diameter portions. There is an upper, enlarged-diameter portion 26, a middle, reduced-diameter portion, generally shown at 28, and a lower, enlarged-diameter portion 30. - A
retainer sleeve 32 radially surrounds thetool mandrel 12. As best seen inFIGS. 2 and 3 , theretainer sleeve 32 has a generally cylindrically-shaped body 34 and presents a number ofwindows 36 disposed through thesleeve body 34. - A cleaning
member support ring 38 is disposed around the reduced-diameter portion 28 of thetool mandrel 12 and located inside of theretainer sleeve 32. Anexemplary support ring 38 is depicted apart from the other components of thescraper device 10 inFIG. 4 . Thesupport ring 38 includes a generallyannular ring body 40 having anaxial separation 42 along its length from end-to-end (seeFIG. 4 ) in the manner of a C-ring. Thering body 40 presents a radiallyoutward surface 44 from which a plurality of cleaning members in the form ofscraper blades 46 project. Thescraper blades 46 may be components that are separate from thering body 40 or, alternatively, they may be affixed to or integrally formed with thering body 40. As best seen inFIG. 3 , each of thescraper blades 46 include an enlargedbase portion 45 and a workingportion 47 that extends radially outwardly from thebase portion 45. In this embodiment, asingle support ring 38 supports and biases a plurality ofscraper blades 46 outwardly. - When the
support ring 38 is disposed radially inside of theretainer sleeve 32, theworking portions 47 of thescraper blades 46 extend through thewindows 36 of theretainer sleeve 32 and extend radially outwardly beyond theretainer sleeve 32, as can be seen inFIGS. 1 and 3 . Thewindows 36 of theretainer sleeve 32 and thescraper blades 46 of thescraper ring 38 are shaped in a complimentary manner to each other. Thescraper ring body 40 has a shape memory that causes thering body 40 to urge thebase portions 45 of thescraper blades 46 radially outwardly against theinterior surface 48 of theretainer sleeve 32. Thering body 40 preferably loosely surrounds the reduced-diameter portion 28 of thetool mandrel 12 so that it is easily rotatable about thetool mandrel 12 during use. - Referring again to
FIG. 1 , it can be seen thatstabilizers tool mandrel 12. Thestabilizers scraper device 10 within a surrounding wellbore during operation. Thestabilizers tool mandrel 12 by virtue ofbearings 54 which are disposed between the stabilizers and themandrel 12. Annular needle-type roller bearings may be used or other suitable bearings, such as full-compliment roller bearings or bushings. - Referring now to
FIG. 5 , it can be seen that thering body 40 can be deflected inwardly when one or more of thescraper blades 46 is contacted by anobstruction 56 in a surrounding wellbore. By virtue of theseparation 42 in thering body 40, the outerradial surface 44 of thering body 40 can be moved inwardly away from the surroundingretainer sleeve 32 as indicated bydeflection space 58 inFIG. 5 . -
FIG. 6 depicts analternative scraper device 10′ which is also constructed in accordance with the present invention. Thescraper device 10′ is constructed in the same manner as thecleaning device 10 except where otherwise indicated. In theexemplary cleaning device 10′ each of thescraper blades 46 is urged against theinterior surface 48 of theretainer sleeve 32 by multiple support rings 38 a, 38 b and 38 c, each having a C-ring configuration. - It is noted that brushes, magnets or other cleaning members might be used in place of scraper blades to create a cleaning device in accordance with the present invention. It can be seen that the present invention provides a cleaning device that is useful for cleaning tubular members and wellbores that are often used in subterranean fluid production, such as the production of hydrocarbons.
- The foregoing description is directed to particular embodiments of the present invention for the purpose of illustration and explanation. It will be apparent, however, to one skilled in the art that many modifications and changes to the embodiment set forth above are possible without departing from the scope and the spirit of the invention.
Claims (20)
1. A cleaning device for use in subterranean fluid production comprising:
a tool mandrel;
a retaining sleeve radially surrounding the tool mandrel and radially rotatable about the mandrel, the retainer sleeve having a sleeve body with a window disposed through the sleeve body; and
at least one cleaning member disposed within the window of the retainer sleeve, the cleaning member having a base portion and a working portion; and
a support ring that radially surrounds the tool mandrel, the support ring having an annular ring body with an axial separation thereof, the support ring biasing the cleaning member radially outwardly such that the working portion is urged radially outwardly through the window.
2. The cleaning device of claim 1 wherein the support ring has a shape-memory to help bias the cleaning member outwardly.
3. The cleaning device of claim 1 wherein the base portion of the working member is biased against an interior radial surface of the retainer sleeve.
4. The cleaning device of claim 1 wherein there are multiple support rings and multiple support rings support and bias a single cleaning member.
5. The cleaning device of claim 1 wherein a single support ring supports and biases multiple cleaning members.
6. The cleaning device of claim 1 wherein the cleaning member comprises a scraper blade.
7. The cleaning device of claim 1 further comprising a stabilizer radially surrounding the tool mandrel.
8. The cleaning device of claim 1 wherein the support ring deflects radially inwardly in response to an obstruction in a surrounding wellbore.
9. A cleaning device for use in subterranean fluid production comprising:
a tool mandrel;
a retaining sleeve radially surrounding the tool mandrel and radially rotatable about the mandrel, the retainer sleeve having a sleeve body with a plurality of windows disposed through the sleeve body; and
a plurality of cleaning members, each cleaning member disposed within one of the windows of the retainer sleeve, the cleaning members each having a base portion and a working portion; and
a support ring that radially surrounds the tool mandrel, the support ring having an annular ring body with an axial separation thereof, the support ring biasing at least one of the cleaning members radially outwardly such that the working portion is urged radially outwardly through the window within which it is disposed.
10. The cleaning device of claim 9 wherein the cleaning members comprise scraper blades.
11. The cleaning device of claim 9 wherein the support rings each have shape memory to help bias the cleaning members outwardly.
12. The cleaning device of claim 9 wherein the base portion of each working member is biased against an interior radial surface of the retainer sleeve.
13. The cleaning device of claim 9 wherein a single support ring supports and biases multiple cleaning members.
14. The cleaning device of claim 9 wherein there are multiple support rings and wherein multiple support rings support and bias a single cleaning member.
15. The cleaning device of claim 9 further comprising a stabilizer radially surrounding the tool mandrel.
16. The cleaning device of claim 9 wherein the support ring deflects inwardly in response to an obstruction in a surrounding wellbore.
17. A cleaning device for use in subterranean fluid production comprising:
a tool mandrel;
a retaining sleeve radially surrounding the tool mandrel and radially rotatable about the mandrel, the retainer sleeve having a sleeve body with a window disposed through the sleeve body; and
at least one cleaning member disposed within the window of the retainer sleeve, the cleaning member having a base portion and a working portion;
a support ring that radially surrounds the tool mandrel, the support ring having an annular ring body with an axial separation thereof, the support ring biasing the cleaning member radially outwardly such that the working portion is urged radially outwardly through the window; and
a stabilizer radially surrounding the tool mandrel.
18. The cleaning device of claim 17 wherein each of the at least one cleaning member comprises a scraper blade.
19. The cleaning device of claim 17 wherein a single support ring supports and biases multiple cleaning members.
20. The cleaning device of claim 17 wherein there are multiple support rings and wherein multiple support rings support and bias a single cleaning member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/684,917 US20110168383A1 (en) | 2010-01-09 | 2010-01-09 | Cleaning Device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/684,917 US20110168383A1 (en) | 2010-01-09 | 2010-01-09 | Cleaning Device |
Publications (1)
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US20110168383A1 true US20110168383A1 (en) | 2011-07-14 |
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ID=44257618
Family Applications (1)
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US12/684,917 Abandoned US20110168383A1 (en) | 2010-01-09 | 2010-01-09 | Cleaning Device |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140000900A1 (en) * | 2012-06-27 | 2014-01-02 | Simon Leiper | Drill string mountable wellbore cleanup apparatus and method |
US20140034271A1 (en) * | 2012-08-01 | 2014-02-06 | Lg Electronics Inc. | Heat exchanger |
US20140034272A1 (en) * | 2012-08-01 | 2014-02-06 | Lg Electronics Inc. | Heat exchanger |
US10208553B2 (en) | 2013-11-05 | 2019-02-19 | Weatherford Technology Holdings, Llc | Magnetic retrieval apparatus |
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US20190226300A1 (en) * | 2012-06-27 | 2019-07-25 | Odfjell Well Services Norway As | Drill string mountable wellbore cleanup apparatus and method |
US11560773B2 (en) * | 2012-06-27 | 2023-01-24 | Odfjell Well Services Norway As | Drill string mountable wellbore cleanup apparatus and method |
US10961822B2 (en) * | 2012-06-27 | 2021-03-30 | Odfjell Well Services As | Drill string mountable wellbore cleanup apparatus and method |
US9109417B2 (en) * | 2012-06-27 | 2015-08-18 | Odfjell Well Services Europe As | Drill string mountable wellbore cleanup apparatus and method |
US10619454B2 (en) * | 2012-06-27 | 2020-04-14 | Odfjell Well Services Norway As | Drill string mountable wellbore cleanup apparatus and method |
US9528325B2 (en) | 2012-06-27 | 2016-12-27 | Odfjell Well Services Norway As | Drill string mountable wellbore cleanup apparatus and method |
US20140000900A1 (en) * | 2012-06-27 | 2014-01-02 | Simon Leiper | Drill string mountable wellbore cleanup apparatus and method |
US9885227B2 (en) | 2012-06-27 | 2018-02-06 | Odfjell Well Services Norway As | Drill string mountable wellbore cleanup apparatus and method |
US10190393B2 (en) * | 2012-06-27 | 2019-01-29 | Odfjell Well Services Norway As | Drill string mountable wellbore cleanup apparatus and method |
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US20140034272A1 (en) * | 2012-08-01 | 2014-02-06 | Lg Electronics Inc. | Heat exchanger |
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US10208553B2 (en) | 2013-11-05 | 2019-02-19 | Weatherford Technology Holdings, Llc | Magnetic retrieval apparatus |
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