Environmentally safe wellhead

Details Environmentally safe wellhead Environmentally safe wellhead

1993-08-11

1995-01-03

Neuder, William P.

Wells

With electrical means

439660, E21B 3310

Patent

active

053777476

ABSTRACT:
An environmentally safe wellhead for wells utilizing electrical submersible pumps which includes an internally tapered casing head into which an externally tapered tubing hanger is closely fitted and sealed. Openings are formed through the tubing hanger parallel to its axis and production tubing is threaded into one of the openings. The power cable for the pump is enclosed in a feedthrough connector disposed and sealed in another of the openings. Tightly fitted metal parts are used and O-ring seals are disposed between the tapered walls of the casing head and hanger as well as between the wall of the opening and the feedthrough connector for the power cable. The feedthrough connector has a metal shell and a separable threadably connected cap member, the interior of which is substantially filled with resilient high dielectric constant material bonded to insulating layers disposed on contacts for the conductors of the cable.

REFERENCES:
patent: 4458903 (1984-07-01), Tohill
patent: 4600054 (1986-07-01), Miller et al.
patent: 4627490 (1986-12-01), Moore
patent: 4685758 (1987-08-01), Yoshida
patent: 4708201 (1987-11-01), Reed
patent: 5108317 (1992-04-01), Beinhaur et al.
patent: 5289882 (1994-03-01), Moore

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