W. R. Grace Co.

Homco International Inc.

Austin S Rogers

A new and improved wire line operated well tool apparatus and method utilizing a downhole transformer for sensing and testing conditions in a well, such as temperature, incline, and the like.

Wire line well tool and method

A new and improved wire line operated well tool for sensing metal in wells and the like, wherein a pair of coils spaced along the tool axis are moved through the well and respond unequally to ferrous material in the well. The coils are activated on alternate cycles of AC energy supplied from the surface, and the AC responses are transmitted back to the surface to indicate the location of the ferrous material. Means are provided to block any DC pulses, as could be caused by galvanic action, from disrupting the meaningful data.

Apparatus for sensing metal in wells

A new and improved wire line operated well tool apparatus and method for sensing and testing conditions in a well, such as stuck drill pipe, and for performing certain operations in the well, such as backing off, or loosening, the stuck pipe.

Stuck well pipe apparatus

A new and improved well tool apparatus and method for sensing and testing conditions in a well, such as stuck drill pipe, temperature, metal creep, and the like, and for performing certain operations in the well, such as backing off, or loosening, the stuck pipe.

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Houston, TX, United States of America

Austin S Rogers