Swivel unit

Details Swivel unit Swivel unit

1981-06-15

1983-07-26

Scanlan, Jr., Richard J.

Pipe joints or couplings

Swivel

Pipe in socket type

285 98, 285142, 285276, F16L 2700, F16L 1702, F16L 2100

Patent

active

043950612

ABSTRACT:
A swivel unit for inflatable packer drill stem test tools has an outer housing with a lower end adapted for connection to the drill stem and an upper end. An inner shaft has a base portion received within the outer housing and has a neck portion which protrudes from the outer housing. Tapered roller bearings located between the outer housing and inner shaft at opposing ends of the inner shaft base portion rotatably mount the outer housing about the inner shaft. The outer housing has a shoulder formed in its external surface for receiving the derrick elevators and supporting the test tool assembly.

REFERENCES:
patent: 1113397 (1914-10-01), Wright
patent: 1190209 (1916-07-01), York
patent: 1514871 (1924-11-01), Sperry
patent: 1746036 (1930-02-01), Gray
patent: 1959823 (1934-05-01), Greve
patent: 2279969 (1942-04-01), Casperson

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