Casing hanger running tool using string weight
This patent describes a running tool for running a casing hanger and setting a packoff in an annulus between the casing hanger and a wellhead. It comprises: a mandrel having means on an upper end for connection to a string of drill pipe; a lower body carried by the mandrel; connection means on the lower body for releasably connecting the lower body to the casing hanger; an upper body carried by the mandrel above the lower body; a setting sleeve carried by the upper body and adapted to be releasably connected to the packoff; and means for moving the upper body and setting sleeve from an upper position relative to the casing hanger and lower body to a lower position with the packoff located between the casing hanger and the wellhead by downward movement of the drill string and mandrel after the casing hanger has been cemented in place.
- Assignee:
- Vetco Gray Inc., Houston, TX (USA)
- Patent Number(s):
- A; US 4928769
- Application Number:
- PPN: US 7-286603A
- OSTI ID:
- 6744612
- Country of Publication:
- United States
- Language:
- English
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