Gripping arrangement for gripping casing
AssigneeWeatherford/Lamb, Inc.
InventorsBernd-Georg Pietras, Joerg-Erich Schulze-Beckinghausen, Andreas Carlsson
Life of this patent
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Abstract
A gripping arrangement for gripping casing is both sufficiently flexible to conform to said casing and substantially inelastic. In a preferred embodiment the gripping arrangement comprises a sheet of zircon paper bonded to a flexible metal carrier plate which has side flanges which fit into an arcuate recess in a jaw holder and bear against the ends of an arcuate pad of resilient elastomeric material. In use, radial forces are applied uniformly through the arcuate paid whilst circumferential forces are transmitted through the flexible metal carrier plate and the side flanges to the arcuate pad and thus to the jaw holder.
Claims13
A gripping arrangement for gripping casing, which gripping arrangement comprising:
- an arcuate pad of resilient elastomeric material provided with a flexible substantially inelastic layer, the arrangement being such that, in use, said flexible substantially inelastic layer can transmit a circumferential force to a jaw holder and said arcuate pad of resilient material urges said flexible substantially inelastic layer, against the circumference of a length of casing to substantially conform thereto;
- and
- a flexible carrier plate disposed between said arcuate pad of resilient elastomeric material and said flexible substantially inelastic layer;
- wherein the flexible carrier plate is provided with side flanges for insertion into a jaw holder.
A gripping arrangement for gripping casing, which gripping arrangement comprising:
- an arcuate pad of resilient elastomeric material provided with a flexible substantially inelastic layer, the arrangement being such that, in use, said flexible substantially inelastic layer can transmit a circumferential force to a jaw holder and said arcuate pad of resilient material urges said flexible substantially inelastic layer, against the circumference of a length of casing to substantially conform thereto;
- a flexible carrier plate disposed between said arcuate pad of resilient elastomeric material and said flexible substantially inelastic layer:
- and
- end plates attached to the flexible carrier plate.
Dependencies are inferred from the claim text.