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Kafe 바로가기국가/구분 | United States(US) Patent 등록 |
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국제특허분류(IPC7판) |
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출원번호 | UP-0618093 (2003-07-11) |
등록번호 | US-7650944 (2010-02-24) |
발명자 / 주소 |
|
출원인 / 주소 |
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대리인 / 주소 |
|
인용정보 | 피인용 횟수 : 11 인용 특허 : 482 |
In one aspect, a method and apparatus for intervening in an offshore pipeline while diverting fluid flow to a storage site is provided, so that production through the offshore pipeline may continue while conducting a pipeline intervention operation. An offshore vessel may be used to divert and store
In one aspect, a method and apparatus for intervening in an offshore pipeline while diverting fluid flow to a storage site is provided, so that production through the offshore pipeline may continue while conducting a pipeline intervention operation. An offshore vessel may be used to divert and store fluid flow while intervening in the pipeline. In another aspect, a method and apparatus for drilling a subsea wellbore with an offshore vessel is provided. The method and apparatus involve drilling the wellbore and casing the wellbore with continuous casing lowered from the offshore vessel.
The invention claimed is: 1. A method of intervening in an existing pipeline that transports wellbore fluid flow from an offshore well to a primary location, the method comprising: forming a first tap in the existing pipeline; diverting the wellbore fluid flow through the first tap to a storage tan
The invention claimed is: 1. A method of intervening in an existing pipeline that transports wellbore fluid flow from an offshore well to a primary location, the method comprising: forming a first tap in the existing pipeline; diverting the wellbore fluid flow through the first tap to a storage tank at a secondary location; forming a second tap in the existing pipeline while the wellbore fluid flow is diverted to the storage tank via the first tap; and intervening in the existing pipeline through the second tap while the wellbore fluid flow is diverted to the storage tank via the first tap. 2. The method of claim 1, wherein the well is underbalanced. 3. The method of claim 1, wherein intervening in the pipeline occurs downstream with respect to initial wellbore fluid flow through the pipeline to the location from the diverting of the wellbore fluid flow to the storage site. 4. The method of claim 1, wherein intervening in the pipeline comprises removing blockage within the pipeline. 5. The method of claim 4, wherein removing blockage comprises injecting acid through coiled tubing inserted in the pipeline. 6. The method of claim 4, wherein removing blockage comprises drilling in the pipeline to remove the blockage. 7. The method of claim 1, wherein intervening comprises removing a pig stuck in the pipeline. 8. The method of claim 1, wherein intervening comprises descaling the pipeline. 9. The method of claim 1, wherein intervening comprises removing paraffin from within the pipeline. 10. The method of claim 1, wherein intervening comprises repairing damage to the pipeline. 11. The method of claim 1, wherein intervening comprises dislodging wellbore equipment stuck in the pipeline. 12. The method of claim 1, further comprising analyzing the wellbore fluid flow to determine whether a build-up has formed on an inside of the pipeline. 13. The method of claim 12, wherein intervening comprises removing the build-up in the pipeline. 14. The method of claim 13, wherein removing build-up comprises injecting acid through a coiled tubing inserted in the pipeline. 15. The method of claim 13, wherein removing build-up comprises drilling in the pipeline to remove the build-up. 16. A method of intervening in a pipeline that transports fluid from an offshore well to a primary location, the method comprising: connecting a first tubular between a floating vessel and the pipeline via a first tap; diverting wellbore fluid through the first tubular to a secondary location comprising a storage tank on the floating vessel; connecting a second tubular between the floating vessel and the pipeline via a second tap; and intervening in the pipeline through the second tubular while wellbore fluid is diverted to the floating vessel via the first tubular. 17. The method of claim 16, wherein intervening comprises removing a pig stuck in the pipeline. 18. The method of claim 16, wherein intervening comprises descaling the pipeline. 19. The method of claim 16, wherein intervening comprises removing paraffin from within the pipeline. 20. The method of claim 16, wherein intervening comprises repairing damage to the pipeline. 21. The method of claim 16, wherein intervening in the pipeline comprises lowering a coiled tubing into a tap in the pipeline. 22. The method of claim 16, wherein the coiled tubing is lowered through a moon pool positioned proximate the storage site. 23. The method of claim 16, wherein the coiled tubing is lowered through a skid deck positioned proximate the storage site. 24. The method of claim 16, wherein intervening in the pipeline occurs downstream with respect to initial wellbore fluid flow through the pipeline to the location from the diverting of the wellbore fluid flow to the storage tank. 25. The method of claim 16, wherein intervening in the pipeline comprises removing blockage within the pipeline. 26. A method of intervening in a pipeline that transports fluid from an offshore well to a primary storage unit, the method comprising: establishing a first communication pathway between a secondary storage unit at an offshore location and the pipeline via a first tap; diverting wellbore fluid through the first communication pathway to the secondary storage unit; establishing a second communication pathway between the offshore location and the pipeline via a second tap; and intervening in the pipeline through the second communication pathway while wellbore fluid is diverted to the secondary storage unit. 27. The method of claim 26, wherein intervening in the pipeline comprises lowering a coiled tubing through the second communication pathway. 28. The method of claim 27, wherein the coiled tubing is lowered through a moon pool on the offshore location. 29. The method of claim 27, wherein the coiled tubing is lowered through a skid deck on the offshore location. 30. The method of claim 26, wherein intervening in the pipeline occurs downstream with respect to initial wellbore fluid flow through the pipeline to the location from the diverting of the wellbore fluid flow to the offshore location. 31. The method of claim 26, wherein intervening in the pipeline comprises removing blockage of the fluid flow within the pipeline. 32. The method of claim 31, wherein removing blockage comprises injecting acid through coiled tubing inserted in the pipeline. 33. A method of removing a blockage in an existing pipeline that transports wellbore fluid flow from an offshore well to a location, the method comprising: forming a first tap at a first location along the existing pipeline; diverting the wellbore fluid flow from the existing pipeline through the first tap to a storage tank on an offshore vessel; forming a second tap at a second location along the existing pipeline, wherein the second location is between the first location and the blockage, and wherein forming the second tap is accomplished after establishing a fluid communication path through the first tap to the storage tank on the offshore vessel; and removing the blockage in the existing pipeline by intervening from the offshore vessel through the second tap while wellbore fluid is diverted through the first tap. 34. The method of claim 33, wherein intervening comprises lowering a coiled tubing into the second tap. 35. A method of intervening in an existing pipeline that transports wellbore fluid flow from a well to a primary storage unit, the method comprising: positioning a floating vessel proximate the existing pipeline; connecting a first tubular between a secondary storage unit on the floating vessel and the existing pipeline to form a diversionary flow path via a first tap; connecting a second tubular between the floating vessel and the existing pipeline to form an intervention flow path via a second tap; and intervening in the existing pipeline through the intervention flow path while wellbore fluid flows through the diversionary flow path. 36. The method of claim 26, wherein the offshore location is a floating vessel. 37. The method of claim 35, wherein the connecting a second tubular is accomplished while wellbore fluid flows through the diversionary flow path.
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