Pipe joints or couplings – Pipe to discreet nipple or sleeve to plate – Nipple bolted to plate
Patent
1980-12-09
1983-11-15
Callaghan, Thomas F.
Pipe joints or couplings
Pipe to discreet nipple or sleeve to plate
Nipple bolted to plate
285144, E21B 1910
Patent
active
044151861
ABSTRACT:
A flanging system for suspending casing and tubing columns for very deep, high pressure oil or gas wells having superimposed spools with adjacent outer flanges for joining the spools, and hangers having axial cylindrical bores therethrough. The spools include inner annular horizontal projections and depending frusto conical portions and the hangers have corresponding outer horizontal annular projections which rest on the inner projections of the spools and complimentary depending frusto conical shapes for positioning within the spools. The lower ends of the hangers are threaded for connection to the columns. In addition, the system has inner and outer seals, wherein the inner seal includes an annular steel ring in a seat in the top of the hanger and a counter seat in the spool immediately above the hanger, and wherein the outer seal includes an annular metal gasket between the projections and preferably annular gaskets in the frusto conical portion of the hangers.
REFERENCES:
patent: 1680900 (1928-08-01), McQuaid
patent: 2087179 (1937-07-01), Barker
patent: 2207255 (1940-07-01), Jesson et al.
patent: 2274477 (1942-02-01), Howard et al.
patent: 2517821 (1950-08-01), Allen
Callaghan Thomas F.
Saipem S.p.A.
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