초록 ▼

The invention relates to an annular seal system designed for high pressure applications in subterranean wells. The annular seal system comprises a vertical stack of subassemblies. Each subassembly incorporates an annular sealing element formed from an elastomeric material, such as a perfluoroelastom

The invention relates to an annular seal system designed for high pressure applications in subterranean wells. The annular seal system comprises a vertical stack of subassemblies. Each subassembly incorporates an annular sealing element formed from an elastomeric material, such as a perfluoroelastomer, which is provided with a truncated pear-shaped cross-sectional configuration having reversely curved axial side surfaces. The sealing element is abutted on each axial side by a uniform thickness annular bearing element formed from a thermoplastic such as a polyphenylene sulfide resin having good bearing properties. Each of the thermoplastic bearing elements is in turn abutted by an annular metallic restraining element having correspondingly shaped reversely curved axial side surfaces and defining an inverted truncated pear-shaped cross-sectional configuration.

대표청구항 ▼

In a seal system mountable on a first conduit and sealingly engagable with a second conduit within a well bore for isolating an annular section between said conduits, the improvement comprising a plurality of axially spaced, annular, elastomeric sealing elements having a truncated pear-shaped cross-

In a seal system mountable on a first conduit and sealingly engagable with a second conduit within a well bore for isolating an annular section between said conduits, the improvement comprising a plurality of axially spaced, annular, elastomeric sealing elements having a truncated pear-shaped cross-section with an inner peripheral surface of greater axial length than the outer peripheral surface and reversely curved side wall surfaces connecting said inner and outer peripheral surfaces, an annular bearing element formed of a relatively nonextrudable bearing material abutting each axial side of each said elastomeric sealing element with a correspondingly shaped reversely curved surface, and means for axially clamping all said sealing elements and retaining elements in assembly.