Magnetic Fishing Tool with Alternative Flow Capability and Method
AssigneeBaker Hughes, A Ge Company, LLC
InventorsThor-Harald Engevik, Rune Jensen
Life of this patent
Estimating the term…
Abstract
The magnetic fishing tool has an axial flow passage through a valve member and one or more magnets for initial dispersal of debris away from the fish. Once engaged to the fish the flow direction can be altered by moving the valve member to open lateral ports and to close the straight through path so that fluid circulates above the fish to clear debris from ahead of the fish on the trip out of the hole. This can be accomplished with an object landed on a seat in the valve member, which causes it to shift axially to expose the lateral ports. Optionally the valve member can be shifted with flow in which case the flow will continue axially as well as laterally for the retrieval of the fish.
Claims30
A magnetic fishing tool for downhole use, comprising:
- a body comprising a through passage and at least one wall port;
- at least one magnet mounted adjacent to a lower end of said body;
- a flow diverter in said passage for selectively directing flow between a first direction toward said magnet and a second direction out said at least on wall port.
A fishing method for downhole use, comprising:
- providing a through passage in a body and at least one wall port;
- locating at least one magnet adjacent to a lower end of said body;
- selectively directing flow, with a flow diverter in said passage, between a first direction past said magnet on approach to a fish to be captured and a second direction out said at least on wall port as the fish is brought out of a downhole location.
Dependencies are inferred from the claim text.