The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 18, 1980
Filed:
Jan. 19, 1979
Amareswar Amancharla, League City, TX (US);
Baker International Corporation, Orange, CA (US);
Abstract
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.