Wellhead connector

Details Wellhead connector Wellhead connector

1997-12-31

2000-10-10

Suchfield, George

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166365, 166368, E21B 3303, E21B 33038

Patent

active

061291498

ABSTRACT:
A connector device for connecting a wellhead christmas tree assembly to a wellhead wherein the device comprises a cylindrical body adapted to be placed in sleeved relationship to the wellhead and having means for attaching a wellhead christmas tree assembly in coaxial relation therewith. The cylindrical body member is further provided with a plurality of lateral openings in equiangular relationship with respect to the axis of the body member. The connector further includes a plurality of locking dogs, each having a toothed front face in conforming configuration with the wellhead exterior and each disposed in a different one of the lateral openings. The connector also includes a first drive means comprising a locking sleeve with an internal camming surface for interacting with a matching cam surface on the back face of each of the locking dogs and adapted by an actuator to drive the locking dogs into locking engagement with the wellhead. The taper of the matching cam surfaces is sufficiently small such that when the drive force is removed, the locking dogs remain in their locking condition. The device also includes a second drive means for forcibly moving the locking dogs away from the wellhead to disconnect from the wellhead where a disconnect is desired.

REFERENCES:
patent: 3739846 (1973-06-01), Beson
patent: 3965977 (1976-06-01), Beson
patent: 4433859 (1984-02-01), Driver et al.
patent: 4526406 (1985-07-01), Nelson
patent: 4703774 (1987-11-01), Seehausen
patent: 4709725 (1987-12-01), Morrison
patent: 4796922 (1989-01-01), Prichard
patent: 4852611 (1989-08-01), Knett et al.

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