Methods and apparatuses for removing metal objects from wells
AssigneeExxonMobil Technology and Engineering Company
InventorsJames B. THOMAS, Tom T. LAI
Life of this patent
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Abstract
An apparatus and method for retrieving metal objects from wellbores are provided. An exemplary apparatus includes a fishing tool that has a metal welding surface. The apparatus also includes an electrode coupled to the metal welding surface and a power source. An exemplary method includes lowering a weld-based fishing tool into a wellbore of a well. The method includes initiating a welding to bond a weld-based fishing tool with a fish. The method includes raising the weld-based fishing tool from the wellbore to retrieve the fish.
Claims23
An apparatus, comprising:
- a fishing tool comprising a metal welding surface;
- and
- an electrode coupled to the metal welding surface and a power source.
An apparatus, comprising:
- a fishing tool comprising a metal welding surface;
- a reservoir containing a mixture of thermite and alloying metal;
- and
- a welding surface coupled to the apparatus to receive molten metal from the reservoir.
A method of retrieving objects from wellbores, comprising:
- lowering a weld-based fishing tool into a wellbore of a well;
- initiating a welding to bond the weld-based fishing tool with a fish;
- and
- raising the weld-based fishing tool from the wellbore to retrieve the fish.
Dependencies are inferred from the claim text.