Simplified subsea production wellhead
Patent
·
OSTI ID:6524756
A simplified subsea production wellhead which permits (1) pumpdown 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. Pumpdown 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.
- Assignee:
- Standard Oil Co (Indiana)
- Patent Number(s):
- US 4230186
- OSTI ID:
- 6524756
- Country of Publication:
- United States
- Language:
- English
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