IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0301229
(2002-11-21)
|
발명자
/ 주소 |
- Doane,James C.
- Harper,Jason M.
|
출원인 / 주소 |
- Baker Hughes Incorporated
|
인용정보 |
피인용 횟수 :
63 인용 특허 :
25 |
초록
▼
An expandable packer or anchor is disclosed. It features a gripping device integral to or mounted in a sleeve over the mandrel and mating undulating surfaces to help maintain grip under changing load conditions. Upon expansion, pressure on a sealing element is enhanced by nodes to increase internal
An expandable packer or anchor is disclosed. It features a gripping device integral to or mounted in a sleeve over the mandrel and mating undulating surfaces to help maintain grip under changing load conditions. Upon expansion, pressure on a sealing element is enhanced by nodes to increase internal pressure as it engages an outer tubular. Adjacent retaining rings limit extrusion and enhance grip. A gripping device, such as wickers on slips, preferably digs into the outer tubular. The expansion is preferably by pressure and can incorporate pressure intensifiers delivered by slick line or wire line. Release is accomplished by a release tool, which is delivered on slick line or wire line. It stretches the anchor or packer longitudinally, getting it to retract radially, for release. The release tool can be combined with packers or anchors that have a thin walled feature in the mandrel, to release by pulling the mandrel apart.
대표청구항
▼
We claim: 1. An expandable packer for sealing a wellbore, comprising: an expandable mandrel said mandrel comprising an innermost tubular of the packer and further comprising a passage therein, said mandrel movable radially outwardly by an applied force from within said passage from a run in positio
We claim: 1. An expandable packer for sealing a wellbore, comprising: an expandable mandrel said mandrel comprising an innermost tubular of the packer and further comprising a passage therein, said mandrel movable radially outwardly by an applied force from within said passage from a run in position to a set position; a sealing element mounted to said mandrel, said mandrel comprises at least one surface irregularity under said sealing element for increasing the internal pressure of said sealing element by remaining under said sealing element when said mandrel is moved toward said set position. 2. The packer of claim 1, wherein: said surface irregularity comprises at least one projection on the mandrel that digs into the sealing element when said mandrel is in said set position. 3. The packer of claim 2, wherein: said projection increases the internal pressure in said sealing element when said mandrel is in said set position. 4. The packer of claim 1, wherein: said surface irregularity comprises at least one depression on the mandrel that allows said sealing element to engage the mandrel as said sealing element is forced into said depression when said mandrel is in said set position. 5. An expandable packer for sealing a wellbore, comprising: an expandable mandrel movable radially outwardly by an applied force from a run in position to a set position; a sealing element mounted to said mandrel, said mandrel comprises at least one surface irregularity in contact with said sealing element; at least one slip mounted to said mandrel; said slip is retained to said mandrel by virtue of at least one surface irregularity on at least one of said mandrel and said slip. 6. The packer of claim 5, wherein: said slip comprises a surface irregularity and said mandrel conforms to the shape of said surface irregularity on said slip when in its said set position. 7. The packer of claim 5, wherein: said slip and said mandrel both comprise surface irregularities that conform to each other in the run in position of said mandrel. 8. The packer of claim 7, wherein: said surface irregularities comprise matching undulating surfaces. 9. The packer of claim 5, wherein: shrinkage of said mandrel as it is forced to said set position in the region of said surface irregularity enhances the grip between the wellbore and said slip. 10. The packer of claim 5, wherein: said surface irregularity creates a radial component of force into said slip into contact with the wellbore in response to an uphole or downhole directed force on said mandrel with said mandrel in said set position. 11. An expandable packer for sealing a wellbore, comprising: an expandable mandrel movable radially outwardly by an applied force from a run in position to a set position; a sealing element mounted to said mandrel, said mandrel comprises at least one surface irregularity in contact with said sealing element; at least one slip mounted to said mandrel; at least one anti-extrusion ring mounted to said mandrel adjacent said sealing element, said anti-extrusion ring mounted in contact with said slip. 12. The packer of claim 11, wherein: said slip contacts said ring in a manner that provides a wedging of said ring toward said sealing element. 13. The packer of claim 12, wherein: said ring contacts said slip by way of contacting sloping surfaces such that movement of said mandrel to said set position creates a reaction force through said slip and said sloping surfaces to urge said ring toward said sealing element. 14. The packer of claim 13, wherein: said sloping surfaces create a longitudinal component of force, acting in the direction of the wellbore, on said sealing element. 15. The packer of claim 11, wherein: said ring has a generally triangular cross-section when taken in alignment with the wellbore. 16. An expandable packer for sealing a wellbore, comprising: an expandable mandrel movable radially outwardly by an applied force from a run in position to a set position: at least one slip mounted to said mandrel; a sealing element mounted to said mandrel; at least one anti-extrusion ring mounted to said mandrel adjacent said sealing element, said anti-extrusion ring mounted in contact with said slip. 17. The packer of claim 16, wherein: said slip contacts said ring in a manner that provides a wedging of said ring toward said sealing element. 18. The packer of claim 17, wherein: said ring contacts said slip by way of contacting sloping surfaces such that movement of said mandrel to said set position creates a reaction force through said slip and said sloping surfaces to urge said ring toward said sealing element. 19. The packer of claim 18, wherein: said sloping surfaces create a longitudinal component of force, acting in the direction of the wellbore, on said sealing element. 20. The packer of claim 16, wherein: said ring has a generally triangular cross-section when taken in alignment with the wellbore. 21. The packer of claim 16, wherein: said slip is retained to said mandrel by virtue of at least one surface irregularity on at least one of said mandrel and said slip. 22. The packer of claim 21, wherein: said mandrel comprises at least one surface irregularity in contact with said sealing element. 23. The packer of claim 16, wherein: force transmitted to the anti-extrusion ring from the sealing element enhances the grip between the slip and the well bore. 24. The packer of claim 16, wherein: said slip comprises a first end closer to said anti-extrusion ring and a plurality of wickers thereon, said wickers being more closely spaced near said first end.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.