Well casing hanger and packoff running and retrieval tool
Patent
·
OSTI ID:5124980
This patent describes a well tool for running a casing hanger and a packoff into, and retrieving a packoff from, a subsea wellhead. It comprises a tubular body including means to releasably connect a packoff to the body for running the packoff into a subsea wellhead; means to releasably connect a packoff to the body for retrieving the packoff from a subsea wellhead; means to relocate the packoff running means and the packoff retrieving means between their functional and non-functional positions; means to releasably connect a casing hanger to the body for running the hanger into a subsea wellhead; a tubular mandrel surrounded by and rotatable with respect to the body; means surrounding the mandrel for moving the casing hanger connection means into functional position; first anti-rotation means preventing relative rotation between the body and the means for moving the casing hanger connection means; second anti-rotation means for preventing relative rotation between connection means; second anti-rotation means for preventing relative rotation between the body and a casing hanger connected thereto: and means for connecting the mandrel to a pipe string for running the tool into a subsea wellhead.
- Assignee:
- NOV; EDB-92-114672; NOV-92-030058
- Patent Number(s):
- A; US 5105888
- Application Number:
- PPN: US 7-683003
- OSTI ID:
- 5124980
- Country of Publication:
- United States
- Language:
- English
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