Hydraulic wireline cutter
AssigneeBaker Hughes Incorporated
InventorsKenneth A. Brumley, John P. Davis, Gregory L Hern, David B. Haughton
Life of this patent
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Abstract
A combination tool for attaching to a stuck wireline tool, then cutting the wireline just above the stuck tool with a hydraulically driven cutter, allowing the wireline to be pulled out of the hole before fishing out the stuck tool. A side door can be provided on the work string, to allow rerouting of the wireline outside the work string, after which the stuck tool can be unstuck and repositioned within the well bore for completion of the downhole operation of the tool, prior to cutting the wireline free from the downhole tool.
Claims8
A method for retrieving a wireline tool stuck in a well bore, comprising:
- providing an attachment device, a blade, and a piston mounted adjacent a lower end of a work string;
- running said work string into a well bore over a wireline to position said attachment device, said blade, and said piston adjacent to a downhole tool suspended in a well bore on said wireline;
- attaching said attachment device to said downhole tool;
- hydraulically driving a said piston in longitudinal movement relative to said work string;
- driving a first wedge in longitudinal movement relative to said work string with said piston;
- and
- driving said blade through said wireline above said attachment device with said longitudinal movement of said first wedge, thereby severing said downhole tool from said wireline.
Dependencies are inferred from the claim text.