The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 1986
Filed:
May. 03, 1983
Applicant:
Inventor:
William M Coffey, Houston, TX (US);
Assignee:
FMC Corporation, Chicago, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
285 18 ; 285 81 ; 285 90 ; 285309 ; 285313 ; 285317 ; 285404 ; 292176 ; 292D / ;
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.