Thomas M Ray

US Patent:

42275733, Oct 14, 1980

Filed:

Nov 16, 1978

Appl. No.:

5/961139

Inventors:

Joseph L. Pearce - Dallas TX
Thomas W. Ray - Plano TX
Donald F. Taylor - Dallas TX
John H. Yonker - Carrollton TX

Assignee:

Otis Engineering Corporation - Dallas TX

International Classification:

E21B 3312

US Classification:

166153

Abstract:

A piston for use as a TFL locomotive or well swab having a seal unit forming a fluid seal between the piston and the inner wall of a flow conductor or tubing string. The seal unit comprising at least one annular fin or lip extending radially from the piston. The annular fin or lip having an exterior portion formed from elastomeric material which is deformable to seal with the flow conductor and an interior portion formed from elastomeric material molded on wire mesh. The interior portion providing increased wear resistance and strength for the annular lip. In one version, the piston carries several individual seal units each having an annular lip.

US Patent:

47534443, Jun 28, 1988

Filed:

Oct 30, 1986

Appl. No.:

6/925279

Inventors:

Alan T. Jackson - Coppell TX
Thomas W. Ray - Plano TX
Eduardo Alvarez - Houston TX

Assignee:

Otis Engineering Corporation - Dallas TX

International Classification:

F16J 1546
F16J 1556
C08G 802
E21B 33128

US Classification:

277230

Abstract:

A seal and seal assembly for use with well tools, such particularly as well packers, for sealing the annulus between the well packer mandrel and the wall of a well tubing such as casing. The seal is fabricated of an elastomeric-like material comprising fluorocarbon resins, poly arylene ketone, and carbon fibers mounted between end retainer assemblies each comprising a mesh anti-extrusion ring, a tapered mesh backup ring, and a metal backup shoe. The seal has internal longitudinally spaced V-shaped recesses to cause the seal to buckle radially outwardly as it is compressed longitudinally to increase the stress along the middle portion of the seal where the seal meets the well casing inner wall. The seal is useful at high temperatures and pressures such as 550 degrees F. and greater than 15,000 psi.