Reduction bushings in the casing of production and injection wel

Details Reduction bushings in the casing of production and injection wel Reduction bushings in the casing of production and injection wel

1989-03-29

1990-12-04

Arola, Dave W.

Pipe joints or couplings

Elbow

285138, 285140, 285286, 285906, F16L 2500

Patent

active

049748807

ABSTRACT:
Improvement to reduction bushings (10, 30, 30), along with particulars of the use thereof, and to systems for sealing to the casing (15, 42), that are considerably different from those so far in use. Instead of O-rings, the seal between the bushing (10, 20, 30) and the casing (15, 42) is achieved by arc-welding (16) done at the tips thereof or by threading the bushing into the top of the casing.

REFERENCES:
patent: 2134199 (1938-10-01), Newton et al.
patent: 2446481 (1948-08-01), Letterman
patent: 2748869 (1956-06-01), Hager
patent: 4343497 (1982-08-01), Bot

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