Landing nipple and plug

Wells – Packers or plugs – With expanding anchor

Patent

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Details

166139, 166140, 166217, 1661175, E21B 33128

Patent

active

047966980

ABSTRACT:
A drilling template for multiple wells has a dummy post on the template associated with each wellhead position and a wellhead connector is transferable between the dummy post and wellhead during completion and workover operations. A subsea wellhead is provided with a guide frame on which a dummy post is supported permitting the wellhead connector to be transferred between the dummy post and the wellhead. The wellhead includes a landing nipple and tubing hanger which permit the tubing hanger to tilt relative to the casing head without breaking the seal between the hanger and nipple. The wellhead connector is latched and released from the tubing hanger by reciprocation of a control sleeve and the connector is held in the unlatched position by a releasable lock. The wellhead connector includes a plug having a metal seal held in compression together with a resilient seal.

REFERENCES:
patent: 3250331 (1966-05-01), Boyle
patent: 3414056 (1968-12-01), Brown et al.
patent: 3593784 (1971-07-01), Brown et al.
patent: 3789925 (1974-02-01), Brown
patent: 3797864 (1974-03-01), Hynes et al.
patent: 4058162 (1977-11-01), Smith
patent: 4121660 (1978-10-01), Koleilat
patent: 4479539 (1984-10-01), Tamplen et al.
patent: 4651818 (1987-03-01), Johnson et al.

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