Well drilling and completion apparatus

Details Well drilling and completion apparatus Well drilling and completion apparatus

1986-05-28

1987-09-08

Novosad, Stephen J.

Wells

Submerged well

Wellhead

166382, E21B 33035

Patent

active

046917810

ABSTRACT:
A drilling template for multiple wells has a dummy post on the template associate 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: 3102591 (1963-09-01), Raulins
patent: 4175620 (1979-11-01), Nolan, Jr. et al.
patent: 4544036 (1985-10-01), Saliger
patent: 4570716 (1986-02-01), Genini et al.
Offshore, Jan. 1980, pp. 49-53.
Cameron Publication, pp. 5-29, 88-89, 115-116.
Petroleum Engineering International, Dec. 1978, pp. 26, 28, 30, 34, 38 and 40.

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