FILTER FOR DEEP HOLE EXCAVATING TOOL

Title:

FILTER FOR DEEP HOLE EXCAVATING TOOL

Document Type and Number:

Japanese Patent JPS5777789

Kind Code:

A

Abstract:

A strainer is shown for use with a downhole tool through which drilling fluid is circulated during the drilling of deep oil wells and the like. The strainer provides a plurality of narrow slots which prevent the passage of material therethrough that might be entrained with the fluid and which otherwise would plug ports or nozzles or restrict flow passages below the strainer.

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Inventors:

KOI EMU FUIRUDAA

Application Number:

JP14182381A

Publication Date:

May 15, 1982

Filing Date:

September 10, 1981

Export Citation:

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Assignee:

CHRISTENSEN INC

International Classes:

B01D29/44; E21B10/60; E21B21/00; E21B27/00; (IPC1-7): E21B10/60

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