Apparatus for retrieving metal objects from a wellbore
AssigneeRattler Tools, Inc.
InventorDavid J. Ruttley
Life of this patent
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Abstract
A tool for retrieving metal objects from a wellbore has a plurality of magnet assemblies spaced longitudinally along a tool body. Each magnet assembly has a plurality of magnet members, which can be arcuate or longitudinal, covering a majority surface area of the tool body. In the embodiment of the invention having longitudinal members, magnet protectors are secured immediately adjacent to a corresponding magnet member for deflecting striking force of the metal particles being attracted to the magnet during rotation of the tool. A trap space if formed between the magnet and an adjacent magnet protector for retaining more metal particles within the magnet assemblies.
Claims5
A method of retrieving metal particles from a well bore, comprising the following steps:
- providing a tool body having a central opening therein;
- providing a plurality of magnet assemblies longitudinally spaced along said tool body, each magnet assembly comprising a plurality of magnet members, said magnet members covering a majority surface area of said tool body, exterior surfaces of said magnet members defining a primary metal particles settling area;
- detachably non-rotatably securing each of said magnet members on said tool body;
- providing a magnet protector for each of said magnet members and forming a trap space between each of said magnet members and a magnet protector of an immediately adjacent magnet member, thereby creating a secondary metal particles settling area;
- lowering said body into the well bore and imparting rotation to said tool body, thereby creating a magnetic field and causing metal particles to settle on said magnet assemblies.
Dependencies are inferred from the claim text.