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US 10,309,187 B2Granted
Downhole fishing tool
AssigneeBiSN Tec Ltd
InventorPaul Carragher
Life of this patent
Estimating the term…
Abstract
An oil or gas well fishing tool (60). The downhole fishing tool (60) has a receptacle (61) that is open at one end. The tool also has deployment tool engaging means (62), located on the opposite end of the receptacle (61) to the one end. The tool further has a layer of an alloy (64) provided on the interior surface of the receptacle (61). The alloy is a eutectic alloy and/or a bismuth alloy. The tool further comprises heating means (65) to heat the alloy (64) so that it melts and can flow over any object received within the receptacle (61).
Claims13
An oil or gas well fishing tool, said tool comprising:
- a receptacle comprising an interior that is open at one end;
- thereby defining an open-end of the receptacle;
- a deployment tool engaging means, located on the opposite end of the receptacle to the one end;
- an alloy provided within the interior of the receptacle, wherein the alloy comprises an eutectic alloy, a bismuth alloy, or both;
- wherein the alloy is provided on an interior surface of the receptacle;
- thereby defining an alloy layer on the interior surface of the receptacle;
- and
- a heating means to heat the alloy so that the alloy melts;
- wherein the heating means comprise an ignition means and a layer of a chemical heat source located between the receptacle and the alloy layer.
6 more elements
Dependencies are inferred from the claim text.