Back to results
US 4,067,388 AGranted
Hydraulic operated casing hanger running tool
AssigneeFMC Corporation
InventorsEdmund M. Mouret, Michael R. Garrett
Life of this patent
Estimating the term…
Abstract
A well tool for running and landing underwater casing hangers. The tool includes a resilient split ring with external threads that engage complementary internal threads on the hanger, and an hydraulic system that is actuated through a control line at the surface, thereby facilitating release of the hanger from the tool by either hydraulic pressure or rotation of the running string to which the tool is attached.
Claims9
A hydraulic operated well tool for running a well device into an underwater well, comprising:
- a. a tool body having means for connection to a pipe string,
- b. a split, resilient latch ring surrounding said tool body,
- c. means on said latch ring to threadedly engage said well device, said means facilitating release of said well tool from said well device by relative rotation between said tool and device,
- d. hydraulic piston means within said tool body and interconnected with said latch ring to actuate said latch ring into engagement with said well device, and
- e. means to conduct hydraulic pressure from a remote location to said hydraulic piston means to actuate said piston means and release said well tool from said well device without rotation of said tool body or said pipe string.
2 more elements
A hydraulic operated well tool for running a well device into an underwater well, comprising:
- a. a tool body having means for connection to a pipe string,
- b. a split, resilient latch ring surrounding said tool body,
- c. means on said latch ring and said well device to releasably interconnect said ring with said well device, said means including complementary threads facilitating threading said well tool and said well device together at a surface location, and unthreading said well tool and well device at a remote location by rotation of said well pipe,
- d. hydraulic piston means within said tool body and interconnected with said latch ring to actuate said latch ring into engagement with said well device, and
- e. means to conduct hydraulic pressure from a remote location to said hydraulic piston means to actuate said piston means and release said well tool from said well device without rotation of said tool body or said pipe string.
2 more elements
Dependencies are inferred from the claim text.