Packer washout assembly

a technology for washing out and packing tools, which is applied in the direction of sealing/packing, fluid removal, borehole/well accessories, etc., can solve the problems of preventing the release of packing tools, time-consuming and expensive procedures, and the need for improved tools to be cost-effective and substantially maintenance-fr
US20070062690A1Inactive Publication Date: 2007-03-22WITCHER HAROLD L
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
WITCHER HAROLD L
Publication Date
2007-03-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

A packer washout assembly for removing debris from a well bore is disclosed. The packer washout assembly includes a tubing string positioned in the well bore and forming an annulus with the well bore. A packer is interposed in the tubing string and is sealable against the interior of the well bore. A packer washout sub is connected to an upper end of the packer. The packer washout sub includes a mandrel having at least one fluid flow port extending through a sidewall and a rupture disk positioned in the fluid flow port of the mandrel. The rupture disk is adapted to rupture upon the application of a predetermined pressure within the fluid passage of the mandrel so as to place the fluid passage in fluid communication with the annulus to permit fluid to pass through the fluid port from the mandrel to the annulus and thereby circulate fluid over the top of the packer so as to wash debris from the top of the packer.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates generally to an apparatus for washing debris from a well bore, and more particularly, but not by way of limitation, to an apparatus and method for washing debris from a packer set in a well bore to permit the packer to be released.

[0003] 2. Brief Description of Related Art

[0004] Packers are downhole tools widely used in the completion of oil and gas wells to isolate and control producing and injected fluids. A variety of packers are known. Packers are often classified as either permanent or retrievable. A permanent packer is recovered from the well bore by using milling tools, while a retrievable packer is designed to be released and retrieved on the production tubing or on a workstring.

[0005] A concern of well operators when setting a retrievable packer is the possibility of debris, such as sand, shale, or rust, settling on top of the packer and prohibiting the release of the packer...

Claims

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