Claude A Sellars

US Patent:

41531132, May 8, 1979

Filed:

Dec 2, 1977

Appl. No.:

5/856784

Inventors:

John W. Hopkins - Sunnyvale CA
Claude A. Sellars - Houston TX

Assignee:

Lockheed Petroleum Services, Ltd. - New Westminster

International Classification:

E21B 712

US Classification:

166356

Abstract:

A subsea drill-thru manifold center for petroleum well completion and production is disclosed. The manifold center is compartmented so each well is within its own gas tight compartment. A removable sleeve through which the well is completed is mounted in each compartment. After each well is completed its sleeve is removable so it can be put in production in the conventional manner.

US Patent:

49729071, Nov 27, 1990

Filed:

Aug 10, 1987

Appl. No.:

7/085299

Inventors:

Claude A. Sellars - Houston TX

Assignee:

Shell Offshore Inc. - Houston TX

International Classification:

E21B 4301
E21B 7128

US Classification:

166353

Abstract:

A method is described for conducting well operations from a floating platform that may be moved to various locations above subterranean formations. Marine risers that have been previously connected to the platform flex sufficiently to allow this movement. The mobility of the platform allows well drilling, completion, producing, and workover activities to be conducted simultaneously through the risers attached to the platform. The mobility of the platform also allows new wells to be drilled at more preferable locations than those that would be available from a fixed bottom supported well template.