Weatherford/lamb, Inc.

Weatherford Technology Holdings, LLC

Mark S Fuller

Albert C Odell, Ii

Andrew D Gledhill

Richard Lee Giroux

Tuong Thanh Le

Gary Thompson

Gregory Guy Galloway

Robert P Badrak

Deborah Lynn Banta

Steven B Smith

Michael Tague Smalley

Kenneth J Dalrymple

A debris barrier assembly for use downhole includes a single body annular barrier having a bore; an extension tubular inserted through the bore; an upper tubular coupled to an upper end of the extension tubular; and a lower tubular coupled to a lower end of the extension tubular, wherein the lower tubular includes a release valve. In one embodiment, the release valve is mechanically opened. In another embodiment, a torque connection is used to couple the upper tubular to the extension tubular.

Debris barrier for downhole tools

Apparatus and methods are provided for reducing drilling vibration during drilling with casing. In one embodiment, an apparatus for reducing vibration of a rotating casing includes a tubular body disposed concentrically around the casing, wherein tubular body is movable relative to the casing. Preferably, a portion of the tubular body comprises a friction reducing material. In operation, the tubular body comes into contact with the existing casing or the wellbore instead of the rotating casing. Because the tubular body is freely movable relative to the rotating casing, the rotating casing may continuously rotate even though the tubular body is frictionally in contact with the existing casing.

Vibration damper systems for drilling with casing

An apparatus for use in a wellbore. The apparatus includes a body and a blade assembly. The blade assembly is movable between a collapsed position whereby the expandable apparatus has a smaller outer diameter and an expanded position whereby the expandable apparatus has a larger outer diameter. The apparatus further includes a pressure activated member for selectively allowing the blade assembly to move from the closed position to the open position. A method for using the apparatus, wherein a drill string with an expandable bit at the end thereof is lowered into the wellbore. Thereafter, the pressure activated member is activated to allow the cutting members to move from the collapsed position to the expanded position. Subsequently, the expandable bit is rotated to form a portion of the wellbore. Next, the expandable bit is deactivated and the cutting members are moved from the expanded position to the collapsed position.

Pressure activated release member for an expandable drillbit

The present invention generally relates to an apparatus and method of forming a wellbore. In one aspect, an expandable bit for use in a wellbore is provided. The expandable bit includes a body and a blade assembly disposed on the body. The blade assembly is movable between a closed position whereby the expandable bit has a smaller outer diameter and an open position whereby the expandable bit has a larger outer diameter. The expandable bit further includes a release assembly for providing a secondary means to move the blade assembly from the open position to the closed position. In another aspect, a method of forming a wellbore is provided. In yet another aspect, an expandable apparatus for use in forming a wellbore is provided.

Expandable bit with secondary release device

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Montgomery, TX, United States of America

Mark S Fuller