Baker Hughes Corporation

David H Lilly

Douglas J Patterson

Vladimir Dubinsky

Holger Stibbe

Jonathan F Hook

Valeriy Richenstev

A downhole tool includes a sensor having a sensitive component, a polymer that at least partially covers the sensitive component, and a hydrophobic material impregnated within the polymer and/or the sensitive component of the sensor. Methods of forming the downhole tool include covering a portion of the sensor with a polymer and impregnating a hydrophobic material within the polymer and/or the sensitive component of the sensor.

Downhole sensors impregnated with hydrophobic material, tools including same, and related methods

An apparatus and method for providing a downhole acoustic source is disclosed. The acoustic source includes a piston configured to oscillate in an axial direction of the acoustic source and produce an acoustic signal in a medium in contact with an exterior surface of the piston, and an elastomer disposed on an interior side of the piston, an acoustic impedance of the elastomer selected to match an acoustic impedance of the piston. A permanent magnet is configured to provide a permanent magnetic field oriented in the axial direction, and a coil disposed on an interior side of the piston produces an alternating magnetic field in the region of the permanent magnetic field. The elastomer may be, for example, a silicon rubber, a silicone jelly, and a silicone oil. A plurality of acoustic sources may be arranged to produce an acoustic dipole configuration or an acoustic quadrupole configuration.

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Houston, TX, United States of America

David H Lilly