Load ring for lifting by elevator, of casing having no upset

Handling: hand and hoist-line implements – Grapple – Band type

Reexamination Certificate

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Details

C138S09600T

Reexamination Certificate

active

07357434

ABSTRACT:
A cylindrical ring sized to slide over the box end of an oilfield tubular having a given external diameter, has a shoulder at one its ends and a sidewall along its length. The sidewall has a circumferential groove about its interior surface housing a band which can be made tight against the exterior surface of the oilfield tubular by a latch, accessible through a slot in the sidewall, and which becomes even tighter if the tubular attempts to escape from the band. In a first orientation, the cylindrical ring is used as a load ring. By turning the cylindrical ring upside down, the cylindrical ring is used as a thread protector for the pin end of the tubular.

REFERENCES:
patent: 2175414 (1939-10-01), Stevenson
patent: 2628134 (1953-02-01), Williams et al.
patent: 4009898 (1977-03-01), Hampton
patent: 4018468 (1977-04-01), Lundquist
patent: 4349048 (1982-09-01), Clark
patent: 5368074 (1994-11-01), Hall
patent: 5524672 (1996-06-01), Mosing et al.
patent: 5706894 (1998-01-01), Hawkins, III
patent: 5819805 (1998-10-01), Mosing et al.
patent: 7159619 (2007-01-01), Latiolais et al.
patent: 233972 (1986-02-01), None

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