Magnetic tool for retrieving metal objects from a well bore when using coil tubing

Abstract

A magnetic tool for retrieval of metal debris from a well bore particularly adapted for use in coil tubing systems. The tool has a cylindrical body and a plurality of separate magnet assemblies mounted on the tool body. The magnet assemblies are separated by spacers, which define a secondary settling area for the metal objects attracted to the magnetic tool. Each magnet assembly has one or more magnet member encased in a protective sleeve

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application is a continuation-in-part of my co-pending application Ser. No. 10 / 935,367 filed on Sep. 7, 2004 entitled “Magnetic Tool for Retrieving Metal Objects from a Well Bore,” the full disclosure of which is incorporated by reference herein. I claim priority of my co-pending prior application in Venezuela, Application Serial Number 2.004-01414 filed on Aug. 31, 2004 entitled “Magnetic Tool for Retrieving Metal Objects from a Well Bore” and in prior U.S. application Ser. No. 10 / 935,367 filed on Sep. 7, 2004 entitled “Magnetic Tool for Retrieving Metal Objects from a Well Bore.”BACKGROUND OF THE INVENTION [0002] The present invention relates to wellbore tools and more particularly to a magnetic tool for retrieval of metal objects, such as cuttings and other foreign objects that accumulate in the process of perforating or milling over bridge plugs and other down hole obstructions from a wellbore. [0003] As the conventional petrol...

AI Technical Summary

Benefits of technology

[0009] Mounted between adjacent magnet assemblies is a tubular spacer, the exterior surface of which forms a secondary settling area for the metal objects attracted to the magnet assemblies. By strategically spacing the magnet assemblies along the length of the tool body, it is possible to create a magnetic field strong enough to cause metal objects to settle on the spacer(s).

Problems solved by technology

As the conventional petroleum resources are becoming more difficult to access, the industry started developing means for drilling in more difficult strata, often in high-pressure or less stable environments.

Images