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Bradley Jay Vincent

Randall J Block

Joel A Hebert

Shane Hinds

Stephen P Rountree

A method and apparatus, capable of being conveyed on wireline, for continuous downhole injection of foaming agent(s) and/or beneficial chemical(s), comprising a reservoir and means for dispensing foaming agent(s) and/or beneficial chemical(s) from the reservoir of such apparatus and into the surrounding wellbore environment.

Method for continous downhole fluid release and well evaluation

The hydraulic system for actuation of the mud valve of a measurement-while-drilling tool is characterized by a hydraulic actuator having a piston operatively connected to the mud valve of a measurement-while-drilling tool, which hydraulic actuator incorporates an internal by-pass which, cooperatively with movement of the piston, opens to unload hydraulic pressure from the system at either end of stroke of the piston. Return from the by-pass to the pump may be restricted so as to maintain some hydraulic pressure on the piston at end of stroke so as to prevent movement therefrom by external forces. The hydraulic system may include a high pressure relief valve, hydraulic fluid strainer and a device to equalize pressure between hydraulic system pressure and pressure external of the system.

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Youngsville, LA, United States of America

Bradley Jay Vincent