IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0934662
(2009-03-27)
|
등록번호 |
US-8672025
(2014-03-18)
|
국제출원번호 |
PCT/US2009/038552
(2009-03-27)
|
§371/§102 date |
20100927
(20100927)
|
국제공개번호 |
WO2009/120957
(2009-10-01)
|
발명자
/ 주소 |
- Wolf, John C.
- Telfer, George
- Atkins, James
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
18 |
초록
▼
A downhole debris recovery tool including a ported sub coupled to a debris sub, a suction tube disposed in the debris sub, and an annular jet pump sub disposed in the ported sub and fluidly connected to the suction tube is disclosed. A method of removing debris from a wellbore including the steps of
A downhole debris recovery tool including a ported sub coupled to a debris sub, a suction tube disposed in the debris sub, and an annular jet pump sub disposed in the ported sub and fluidly connected to the suction tube is disclosed. A method of removing debris from a wellbore including the steps of lowering a downhole debris removal tool into the wellbore, the downhole debris removal tool having an annular jet pump sub, a mixing tube, a diffuser, and a suction tube, flowing a fluid through a bore of the annular jet pump sub, jetting the fluid from the annular jet pump sub into the mixing tube, displacing an initially static fluid in the mixing tube through the diffuser, thereby creating a vacuum effect in the suction tube to draw a debris-laden fluid into the downhole debris removal tool, and removing the tool downhole debris removal tool from the wellbore after a predetermined time interval is also disclosed. Further, an isolation valve including a housing, an inner tube disposed coaxially with the housing, and a gate, wherein the gate is configured to selectively close an annular space between the housing and the inner tube is disclosed.
대표청구항
▼
1. A downhole debris removal tool comprising: a ported sub coupled to a debris sub;a suction tube disposed in the debris sub; andan annular jet pump sub disposed in the ported sub and fluidly connected to the suction tube, the annular jet pump sub comprising:at least one opening disposed proximate a
1. A downhole debris removal tool comprising: a ported sub coupled to a debris sub;a suction tube disposed in the debris sub; andan annular jet pump sub disposed in the ported sub and fluidly connected to the suction tube, the annular jet pump sub comprising:at least one opening disposed proximate a lower end of the annular jet pump sub and configured to expel a flow of fluid from a bore of the annular jet pump sub; andan annular jet cup configured to vary a size of the at least one opening. 2. The tool of claim 1, further comprising a flow diverter disposed in the debris sub. 3. The tool of claim 2, further comprising a screen disposed in the debris sub and configured to receive a flow of fluid from the flow diverter. 4. The tool of claim 1, further comprising a bottom sub coupled to a lower end of the debris sub. 5. The tool of claim 4, further comprising a debris removal cap coupled to the bottom sub. 6. The tool of claim 1, wherein the annular jet pump sub comprises two stages. 7. The tool of claim 1, wherein the ported sub comprises a mixing tube configured to receive a flow of fluid from the annular jet pump sub and the debris sub. 8. The tool of claim 1, further comprising a diffuser disposed in the ported sub and configured to expel a flow of fluid from the mixing tube to a casing annulus. 9. The tool of claim 1, further comprising at least one magnet disposed proximate the screen. 10. The tool of claim 1, further comprising an isolation valve disposed in selective fluid communication with the debris sub. 11. The tool of claim 10, wherein the isolation valve is configured to selectively close an annular space disposed between an inner tube and a housing. 12. The tool of claim 11, wherein the isolation valve is configured to selectively close a bore disposed coaxially in the inner tube. 13. The tool of claim 1, further comprising a drain pin configured to allow selective communication between the debris sub and the suction tube. 14. A method of removing debris from a wellbore comprising: lowering a downhole debris removal tool into the wellbore, the downhole debris removal tool comprising an annular jet pump sub, a mixing tube, a diffuser, and a suction tube;flowing a fluid through a bore of the annular jet pump sub;jetting the fluid from the annular jet pump sub into the mixing tube;displacing an initially static fluid in the mixing tube through the diffuser, thereby creating a vacuum effect in the suction tube to draw a debris-laden fluid into the downhole debris removal tool; andremoving the tool downhole debris removal tool from the wellbore after a predetermined time interval. 15. The method of claim 14, further comprising actuating an isolation valve. 16. The method of 14, wherein the actuating the isolation valve comprises: selectively actuating a gate, wherein the gate selectively closes an annular space between a housing and an inner tube of the isolation valve. 17. The method of claim 14, further comprising collecting metallic debris. 18. The method of claim 14, further comprising: opening a drain pin after removing the downhole debris removal tool; andreleasing fluid through the suction tube. 19. The method of claim 14, further comprising flowing a suction flow of debris-laden fluid through a screen. 20. The method of claim 14, further comprising adjusting a location of an annular jet cup disposed on the annular jet pump sub to vary a jet size of the jetted fluid. 21. An isolation valve comprising: a housing;an inner tube disposed coaxially within the housing; anda gate, wherein the gate is configured to selectively restrict fluid flow through an annular space between the housing and the inner tube by obstructing a portion of the annular space. 22. The isolation valve of 21, wherein the gate is configured to selectively close a bore of the inner tube.
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