Subsea wellhead connector

Details Subsea wellhead connector Subsea wellhead connector

1983-05-03

1986-08-19

Husar, Cornelius J.

Pipe joints or couplings

With assembly means or feature

285 81, 285 90, 285309, 285313, 285317, 285404, 292176, 292DIG24, F16L 3700

Patent

active

046065571

ABSTRACT:
A pipe connector especially suitable for interconnecting a marine riser to a subsea wellhead, the connector comprising an annular body that telescopes over the wellhead, and a plurality of lockdown screw assemblies extending through radial ports in the body to releasably grip and secure the connector to the wellhead. Each screw assembly comprises a lockdown dog for engaging the recess beneath the wellhead hub flange, a bolt-like dog retainer secured to the dog and slidably extending into a lockdown screw that is threaded into one of the radial ports, and a spring system for biasing the dog away from the lockdown screw towards engagement with the wellhead.

REFERENCES:
patent: 557423 (1896-03-01), Outhouse et al.
patent: 1790238 (1931-01-01), Klein
patent: 3228715 (1966-01-01), Neilon et al.
patent: 3645563 (1972-02-01), Rochelle
patent: 3796448 (1974-03-01), Ringkamp
patent: 3827728 (1974-08-01), Hynes
patent: 4312524 (1982-01-01), Allread

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