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US 2009/0151951 A1Published application
Adjustable Diameter Fishing Tool
OwnerZafer Erkol, Gokturk Tuncinventors
Life of this patent
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Abstract
A technique utilizes a fishing tool that enables fishing operations for retrieval of well tools that may have a variety of sizes and configurations. The fishing tool is adjustable to enable selection of a desired size for engagement with a specific wellbore tool. The fishing tool is moved downhole to the well tool and engaged with the well tool. Once the fishing tool is engaged, the well tool can be retrieved to the surface.
Claims25
A method of making an adjustable fishing tool, comprising:
- preparing a mandrel with a mandrel end having a radially directed slope;
- providing a fishing dog structure with a plurality of fishing dogs having attachment ends;
- mounting the fishing dog structure around the mandrel for movement along the mandrel;
- and
- positioning the attachment ends for sliding contact with the radially directed slope during movement of the fishing dog structure along the mandrel to enable engagement with wellbore tools having a variety of sizes.
2 more elements
A device for use in a well, comprising:
- a fishing tool to engage well tools of a variety of sizes during a fishing operation, the fishing tool comprising:
- a mandrel having a mandrel end that transitions from a small diameter region to a large diameter region;
- and
- a fishing dog structure slidably mounted along the mandrel, the fishing dog structure having attachment ends positioned against the mandrel end, wherein movement of the fishing dog structure along the mandrel moves the attachment ends between the small diameter region and the large diameter region to change the size of the fishing tool.
1 more element
A method, comprising:
- moving a fishing tool downhole to a wellbore tool;
- actuating the fishing tool to a configuration for engagement with any of a plurality of wellbore tools having different sizes;
- and
- retrieving the wellbore tool with the fishing tool.
1 more element
A device for performing a fishing operation, comprising:
- a fishing tool having attachment ends designed to engage a wellbore tool to be fished from a wellbore, the fishing tool further comprising an actuation mechanism to enable engagement of the attachment ends with wellbore tools of multiple sizes.
Dependencies are inferred from the claim text.