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US 4,234,197 AGranted
Conduit sealing system
AssigneeBaker International Corporation
InventorAmareswar Amancharla
Life of this patent
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AssigneeBaker International Corporation
InventorAmareswar Amancharla
Estimating the term…
A seal system is provided with a series of annular seal assemblies separated by relatively rigid spacing members and may be preferably adapted to selectively sealing engage a packer apparatus within a well bore conduit, during the completion or workover of a subterranean oil or gas well. Preferably, each seal assembly comprises four annular seal members in sequence. The outermost seal members are formed from a thermoplastic polymer having a coefficient of expansion greater than that of the rigid spacing members and the conduit, with physical resistance to corrosive chemicals and high temperature and pressure environments. The outermost member has a physical hardness sufficient to withstand extrusion into a gap defined between the rigid spacing member and the conduit by pressure transmitted from the rigid spacing member. One of the inner seal members is a flexible perfluoro polymer with enhanced permanent set and cold flow. The second of the inner seal members is an elastomer derived from the copolymerization of tetrafluoroethylene and perfluoroethers.
In a seal system carriable by a first conduit and sealingly engageable with a second conduit within a well bore for isolating an annular section between said conduits, the improvement comprising:
A seal system carriable by a first conduit and sealingly engageable with a second conduit within a well bore for isolating an annular section between said conduits, comprising:
In a seal system carriable by a first conduit and sealingly engageable with a second conduit within a well bore for isolating an annular section between said conduits, the improvement comprising:
Dependencies are inferred from the claim text.