Simplified subsea production wellhead

Details Simplified subsea production wellhead Simplified subsea production wellhead

1978-12-11

1980-10-28

Leppink, James A.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166 94, 175 7, 405169, E21B 712

Patent

active

042301866

ABSTRACT:
A simplified subsea production wellhead which permits (1) pump-down tool operations for routine well maintenance and (2) vertical entry to the wellbore for major workover operations. The wellhead can be lowered by the production pipeline to a wellhead site on the sea floor. The production wellhead includes a diverter spool for releasably attaching to a subsea well. Pump-down tools can be used with the diverter spool. If vertical entry of the subsea well is required, the diverter spool can be released, raised and moved horizontally to one side of the subsea well, giving vertical entry. After workover operations, the diverter spool is again moved over the subsea well and reattached.

REFERENCES:
patent: 2755863 (1956-07-01), Stansbury, Jr. et al.
patent: 3373807 (1968-03-01), Fischer et al.
patent: 3741296 (1973-06-01), Murman et al.
patent: 3934647 (1976-01-01), Bokenkamp
patent: 3953982 (1976-05-01), Pennock
patent: 3981369 (1976-09-01), Bokenkamp
patent: 4147221 (1979-04-01), Ilfrey et al.
patent: 4167215 (1979-09-01), Thorne

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