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Dual-Pole Magnetic Attraction Downhole Magnetic Retrieval Apparatus

a magnetic retrieval and dual-pole magnet technology, applied in the direction of drilling casings, drilling pipes, borehole/well accessories, etc., can solve the problem of metal-to-metal scraping

Inactive Publication Date: 2011-11-24
BAKER HUGHES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a magnetic retrieval tool for removing metallic debris from wellbores or tubular members. The tool includes a tool mandrel with insert pockets and a central collar with keyed openings. The tool also has a plurality of removable, modular inserts that reside within the insert pockets and are stabilized by spacers. The inserts have magnets and a longitudinal, axially extending fin that captures metallic debris. The tool can be used to remove debris from wellbore or tubular members, improving the efficiency of drilling and wellbore construction.

Problems solved by technology

These shavings and cuttings result from numerous frictional operations that might occur within the wellbore or tubular, including the cutting of sidetracking windows, milling, drilling through of stuck devices and objects, as well as general operations that cause metal-to-metal scraping to occur.

Method used

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  • Dual-Pole Magnetic Attraction Downhole Magnetic Retrieval Apparatus
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  • Dual-Pole Magnetic Attraction Downhole Magnetic Retrieval Apparatus

Examples

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Embodiment Construction

[0025]FIGS. 1-8 and 9 illustrate a first exemplary magnetic retrieval tool 10 that is constructed in accordance with the present invention. The tool 10 includes a cylindrical tool mandrel 12 which defines a central flowbore 14 (see FIG. 2) along its length. The tool mandrel 12 is provided with threaded connections 16 at its axial ends to permit the tool 10 to be incorporated into a downhole work string.

[0026]The tool mandrel 12 presents an outer radial surface 18 with a plurality of recessed pockets 20 formed therewithin. In the depicted embodiment, there are four pockets 20. Each of the pockets 20 is preferably axially elongated and arcuately curved, as shown in FIG. 3, wherein an empty pocket 20 is shown. In the depicted embodiment, each pocket 20 is located on the opposite side of the mandrel 12 from another pocket 20. In this embodiment, the pockets 20 provide an essentially semi-circular opening. The tool mandrel 12 also presents a radially-enlarged collar 22 which projects rad...

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Abstract

A magnetic retrieval tool used for collecting metallic debris and material from within a wellbore or other surrounding downhole tubular. The tool includes a tool mandrel with a removable insert which contains one or more magnets. The insert is formed such that both the north and south magnetic poles of the one or more magnets are able to attract metallic debris.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The invention relates generally to systems and methods for cleaning the interior of tubular members. In particular aspects, the invention relates to methods and devices for removing metallic debris from tubular members using magnets. In other particular aspects, the invention relates to magnetic retrieval devices that externally present both north and south poles of magnets for removal of metallic debris.[0003]2. Description of the Related Art[0004]Metallic debris accumulates within wellbores and other tubular members during production of subterranean fluids, such as hydrocarbon fluids. This metallic debris typically includes tiny metal shavings and cuttings. These shavings and cuttings result from numerous frictional operations that might occur within the wellbore or tubular, including the cutting of sidetracking windows, milling, drilling through of stuck devices and objects, as well as general operations that cause m...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B31/06
CPCE21B17/1078E21B37/00E21B31/06
Inventor HERN, GREGORY L.ASHY, THOMAS M.MELDER, JACE E.PALMER, LARRY T.CONNELL, PAUL L.NELSON, JONATHAN F.
Owner BAKER HUGHES INC
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