Flanging system for suspending casting and tubing columns for high pressure oil or gas wells
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United States of America Patent
Stats
-
Nov 15, 1983
Grant Date -
N/A
app pub date -
Dec 9, 1980
filing date -
Feb 19, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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