[특허]Expandable seal assembly with anti-extrusion backup

Expandable seal assembly with anti-extrusion backup 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16J-015/00
출원번호	US-0514161 (1995-08-11)
발명자 / 주소	Keyser Jr. William F. (Willis TX) Bell Merle L. (New Waverly TX) Edwards Ronney P. (Richardson TX) Woods Weston W. (Houston TX)
출원인 / 주소	Greene, Tweed of Delaware, Inc. (Wilmington DE 02)
인용정보	피인용 횟수 : 35 인용 특허 : 0

초록 ▼

An annular expandable seal assembly is disclosed for being packed between inner and outer cylindrical walls. The seal assembly has an annular expandable elastomeric seal element, an annular non-elastomeric anti-extrusion element, and an arcual non-elastomeric anti-extrusion bridge element. The seal element has opposing inner and outer axial surfaces and opposing first and second radial surfaces. The anti-extrusion element is coaxially positioned at the first radial surface and has a toroidal gap. The bridge element is positioned between the seal element and the anti-extrusion element in alignment with the toroidal gap. The seal assembly is set by being expanded so that the inner and outer surfaces respectively sealingly contact the inner wall and the outer wall, the toroidal gap expands, and the anti-extrusion element and the bridge element contact the outer wall. When pressure is applied to the set seal assembly adjacent the second radial surface, the anti-extrusion element and the bridge element together function as a backup to prevent seal element extrusion at the outer wall.

대표청구항 ▼

A generally annular expandable seal assembly for being set into a generally cylindrical space defined by an inner cylindrical wall and an outer cylindrical wall, the seal assembly comprising: a generally annular expandable seal element formed from an elastomeric material and having opposing inner and outer generally axial surfaces and opposing first and second generally radial surfaces, the seal element further having a first annular recessed surface extending between the first radial surface and the outer surface, the first recessed surface recessed toward the inner surface and the second radial surface and including a first arcual portion and a second arcual portion more recessed than the first arcual portion; a first generally annular anti-extrusion element formed from a non-elastomeric material and generally coaxial with the seal element, the first anti-extrusion element having a toroidal gap, the first anti-extrusion element being positioned at the first radial surface adjacent the outer surface of the seal element such that a radially outermost portion of the first anti-extrusion element is substantially co-extensive with the outer surface; and a first generally arcual anti-extrusion bridge element formed from a non-elastomeric material and having a radially outermost portion substantially co-extensive with the outer surface of the seal element, the first bridge element further having a first principal surface substantially completely contacting the second arcual portion and a second opposing principal surface substantially co-extensive with the first arcual portion, the first anti-extrusion element further having an exterior surface and an interior surface defining a generally annular chamber, at least a first portion of the exterior surface substantially completely contacting the second principal surface of the first bridge element and the first arcual portion of the seal element, the first bridge element being positioned between the seal element and the first anti-extrusion element generally in alignment with the toroidal gap; wherein the seal assembly is set by being expanded so that the inner surface sealingly contacts the inner wall and the outer surface sealingly contacts the outer wall, the toroidal gap in the first anti-extrusion element expands, and the first anti-extrusion element and the first bridge element contact the outer wall such that when pressure is applied to the set seal assembly adjacent the second radial surface, the first anti-extrusion element and the first bridge element together function as a backup to prevent extrusion of the seal element at the outer wall.

이 특허를 인용한 특허 (35)

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McKee, L. Michael; Eslinger, David M.; Hill, Stephen D., Anti-extrusion apparatus and method.
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Bell, Merle L.; Bagley, Daniel P.; Schuette, Scott C., Anti-extrusion device for downhole applications.
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Reinhardt, Paul Andrew; Turley, Rocky A.; Lirette, Brent J.; Le, Huy V., Extrusion-resistant seals for expandable tubular assembly.
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Loren C. Swor ; Donald W. Winslow ; Lee Wayne Stepp ; Kenneth G. Neal ; Phillip M. Starr, High temperature high pressure retrievable packer with barrel slip.
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Xu, Richard Y., Load distributing apparatus and method.
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Atkins,Nicholas; Egleton,Phillip; Spalding,Craig, Pressure control tool for modluating pressure in a portion of a wellbore.
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Fidel M. Joco, Recessed groove/seal surface for seal effectiveness.
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Swor Loren C. ; Stepp Lee Wayne ; Winslow Donald W., Retrievable high pressure, high temperature packer apparatus with anti-extrusion system.
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Swor Loren C. ; Stepp Lee Wayne ; Winslow Donald W., Retrievable high pressure, high temperature packer apparatus with anti-extrusion system and method.
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Bell Merle L. ; Gravill Ian,GBX, Seal assembly with backup elements having coil springs positioned therein.
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Nilkanth Vinay K. ; Roberts Paul E. ; Guevara Saul ; Ner Romel R., Seal assembly with mechanically joined anti-extrusion rings.
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Pressler, Jonathan W., Seal material having anisotropic properties.
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Givens, George; Turley, Rocky A., Seal stem.
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Neer, Adam K.; Havelka, Emil; Crockford, Lloyd, Single piece packer extrusion limiter ring.
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Derby, Michael C., Split foldback rings with anti-hooping band.
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Turley, Rocky A.; Lirette, Brent J.; Le, Huy V., Stage tool.
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Clemens, Jack Gammill; Ludwig, Wesley Neil; Vick, Jr., James Dan; Rodgers, John Patrick; Eaton, Edwin A.; Serra, Marco, Through tubing bridge plug and installation method for same.
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Expandable seal assembly with anti-extrusion backup 원문보기

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