Casing hanger running tool using annulus pressure
Patent
·
OSTI ID:5797811
This patent describes a running tool for setting a packoff between a casing hanger and a wellhead housing. It comprises a mandrel having means for connection to a string of conduit; a body carried by the mandrel; means for releasably connecting the packoff to the body; an elastomeric seal mounted on the body above the packoff for sealing engagement with the wellhead housing; means for transmitting weight of the string of conduit to the body to apply a downward force on the packoff once the packoff is located between the casing hanger and wellhead housing to initially set the packoff; and means for applying hydraulic pressure to the interior of the wellhead housing above the elastomeric seal to cause the body to exert a downward force on the packoff to finally set the packoff; and means for retrieving the running tool along with the elastomeric seal once the packoff has set.
- Assignee:
- Abb Vetcogray Inc., Houston, TX (United States)
- Patent Number(s):
- A; US 5044442
- Application Number:
- PPN: US 7-472788
- OSTI ID:
- 5797811
- Country of Publication:
- United States
- Language:
- English
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