Apparatus and methods for separating and joining tubulars in a wellbore
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
E21B-023/01
E21B-023/00
출원번호
US-0999644
(2004-11-29)
발명자
/ 주소
Simpson,Neil A. A.
Trahan,Kevin O.
출원인 / 주소
Weatherford/Lamb, Inc
대리인 / 주소
Patterson &
인용정보
피인용 횟수 :
3인용 특허 :
88
초록▼
The present invention provides methods and apparatus for cutting tubulars in a wellbore. In one aspect of the invention, a cutting tool having radially disposed rolling element cutters is provided for insertion into a wellbore to a predetermined depth where a tubular therearound will be cut into an
The present invention provides methods and apparatus for cutting tubulars in a wellbore. In one aspect of the invention, a cutting tool having radially disposed rolling element cutters is provided for insertion into a wellbore to a predetermined depth where a tubular therearound will be cut into an upper and lower portion. The cutting tool is constructed and arranged to be rotated while the actuated cutters exert a force on the inside wall of the tubular, thereby severing the tubular therearound. In one aspect, the apparatus is run into the well on wireline which is capable of bearing the weight of the apparatus while supplying a source of electrical power to at least one downhole motor which operates at least one hydraulic pump. The hydraulic pump operates a slip assembly to fix the downhole apparatus within the wellbore prior to operation of the cutting tool. Thereafter, the pump operates a downhole motor to rotate the cutting tool while the cutters are actuated.
대표청구항▼
What is claimed is: 1. A method of cutting a tubular in a wellbore comprising: expanding at least a portion of the tubular in the wellbore; conveying a cutting member into the wellbore; separating the tubular into a first section and a second section; removing the first section from the wellbore.
What is claimed is: 1. A method of cutting a tubular in a wellbore comprising: expanding at least a portion of the tubular in the wellbore; conveying a cutting member into the wellbore; separating the tubular into a first section and a second section; removing the first section from the wellbore. 2. The method of claim 1, wherein the tubular is separated proximate an expanded portion of the tubular. 3. The method of claim 1, wherein the second section is at least partially expanded. 4. The method of claim 3, further comprising forming a connection between the second section and a larger diameter tubular. 5. The method of claim 1, wherein the tubular is separated at an unexpanded portion of the tubular. 6. The method of claim 1, further comprising actuating the cutting member. 7. The method of claim 6, wherein actuating the cutting member comprises extending the cutting member radially into engagement with the tubular. 8. The method of claim 7, further comprising rotating the cutting member to separate the tubular. 9. The method of claim 6, further comprising supplying fluid pressure to actuate the cutting member. 10. The method of claim 1, wherein the cutting member comprises a plurality of cutting blades. 11. The method of claim 10, further comprising placing the plurality of cutting blades in an unactuated position. 12. The method of claim 1, wherein the tubular is conveyed into the wellbore along with the cutting member. 13. The method of claim 1, wherein an expander tool is conveyed into the wellbore along with the cutting member. 14. The method of claim 13, wherein the tubular is conveyed into the wellbore along with the cutting member. 15. The method of claim 1, further comprising expanding at least a portion of the second section of the tubular. 16. The method of claim 1, wherein separating the tubular comprises rotating the cutting member. 17. The method of claim 1, wherein the tubular comprises a casing. 18. A method of cutting a tubular in a wellbore, comprising: disposing at least a portion of the tubular in a larger diameter tubular; providing a cutting apparatus having an extendable cutting member; extending the cutting member into contact with the tubular; and rotating the cutting apparatus to deform the tubular, the degree of deformation being such that the tubular is cut; and expanding the tubular. 19. The method of claim 18, wherein the cutting member is freely rotatable about an axis which is substantially parallel to the longitudinal axis of the cutting apparatus. 20. The method of claim 19, wherein the cutting member comprises a roller having a raised circumferential portion formed thereon. 21. The method of claim 18, wherein the cutting apparatus further comprises an actuator for extending or retracting the cutting member. 22. The method of claim 21, wherein extending the cutting member comprises supplying fluid pressure to activate the actuator. 23. The method of claim 22, wherein the actuator comprises a piston. 24. The method of claim 18, wherein the tubular is cut at an unexpanded portion of the tubular. 25. The method of claim 18, wherein expanding the tubular and cutting the tubular is performed in a single trip into the wellbore. 26. The method of claim 18, wherein the tubular is expanded into contact with the larger diameter tubular. 27. The method of claim 18, wherein the tubular is cut proximate an expanded portion. 28. The method of claim 18, wherein the tubular is cut at the portion of the tubular disposed in the larger diameter tubular. 29. A method of cutting a section of tubing in a borehole, comprising: providing a cutting device having at least one radially movable piston that includes a cutter; positioning the device in the borehole adjacent a tubular in the borehole; supplying fluid pressure through a conduit to an internal portion of the cutting device, thereby extending the piston such that at least a portion of the cutter contacts the tubular; and rotating the cutting device to deform the tubular, the degree of deformation being such that the tubular is cut. 30. A tool string for cutting and expanding a tubular in a wellbore, comprising: a cutting tool disposed on the tool string, the cutting tool configured for transversely severing the tubular; and an expansion tool disposed on the tool string. 31. The tool string of claim 30, wherein the cutting tool is rotatable and includes a radially extendable cutter for contacting an inside of the tubular in order to sever the tubular. 32. The tool string of claim 30, wherein the expansion tool is rotatable and includes a radially extendable member for contacting an inside of the tubular and applying a radial force to expand the tubular. 33. A method of expanding and cutting a tubular in a wellbore, comprising: running an apparatus into the wellbore, the apparatus including a cutter and an expander disposed on a run-in string; operating the expander to expand a portion of the tubular; and operating the cutter to sever transversely the tubular.
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이 특허에 인용된 특허 (88)
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Owen Harrold D. (Fort Worth TX) Roper Robert Lee (Burleson TX) Smith J. C. (Fort Worth TX) Young James Douglas (Crowley TX), Liner and reinforcing swage for conduit in a wellbore and method and apparatus for setting same.
McNair Robert J. (The Woodlands TX) Bangert Daniel S. (Kingwood TX), Method and apparatus for sealing the juncture between a vertical well and one or more horizontal wells.
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Worrall Robert N. (Rijswijk NLX) Lohbeck Wilhelmus C. M. (Rijswijk NLX) Choate Paul R. (Rijswijk NLX) Donnelly Martin (Arnhem NLX), Method of creating a wellbore in an underground formation.
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