Fred Enrique Fox

US Patent:

43089275, Jan 5, 1982

Filed:

Apr 1, 1980

Appl. No.:

6/136358

Inventors:

Fred K. Fox - Austin TX

Assignee:

Engineering Enterprises, Inc. - Houston TX

International Classification:

E21B 402

US Classification:

175107

Abstract:

There is disclosed a turbodrill having thrust bearings received within an annular space between its shaft and case to support the shaft for rotation within the case, and a face seal closing off the lower end of the space beneath seal rings forming a lubricant chamber in which the bearings are contained. One seal ring of the face seal is carried by the case for rotation therewith, and the other seal ring thereof is carried by a sleeve for rotation therewith. The sleeve extends from within the space to a level beneath the case, and is connected to the shaft for rotation therewith. Means are provided for moving the sleeve longitudinally with respect to the shaft in order to adjust the preload applied by springs to the other seal ring of the face seal.

US Patent:

42600324, Apr 7, 1981

Filed:

Nov 26, 1979

Appl. No.:

6/097133

Inventors:

Fred K. Fox - Austin TX

Assignee:

Engineering Enterprises, Inc. - Houston TX

International Classification:

E21B 402

US Classification:

175107

Abstract:

There is disclosed a turbodrill having an axial thrust bearing section which is contained within a lubricant chamber arranged within an annular space between the case and shaft of the turbodrill above the turbine section, and which is defined between means sealing between the shaft and the case which, in use of the turbodrill, are above the drilling fluid circulating therethrough.