1
Andrew D Gledhill, Mark S Fuller, Kenneth J Dalrymple: Expandable bit with secondary release device. Weatherford Lamb, Moser Patterson & Sheridan L, October 11, 2005: US06953096 (119 worldwide citation)

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 ...


2
Albert C Odell II, Andrew D Gledhill, Michael Tague Smalley, Mark S Fuller: Pressure activated release member for an expandable drillbit. Weatherford Lamb, Patterson & Sheridan, November 7, 2006: US07131504 (11 worldwide citation)

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 ...


3
Andrew E Massie, Andrew D Gledhill: Combined control valve and coupler. Aker Subsea, Nixon & Vanderhye PC, April 30, 2013: US08430125 (2 worldwide citation)

A control valve includes a body including an internal passageway and is constituted at one end as a coupler that includes a valve poppet openable to allow fluid access to or from the passageway past the poppet. The body defines at least one lateral port. A valve spool is disposed within the body and ...


4
Andrew D Gledhill, Mark S Fuller, Kenneth J Dalrymple: Expandable bit with a secondary release device. Moser Patterson & Sheridan, July 1, 2004: US20040124011-A1 (2 worldwide citation)

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 ...


5
Matthew H Tibbitts, Andrew D Gledhill, David S Innes: Electrically operated hydraulic valve. Aker Subsea, Nixon & Vanderhye PC, July 3, 2012: US08210208 (1 worldwide citation)

An electrically operated hydraulic valve comprises a valve assembly that provides a common valve passageway, an inlet port, an outlet port and a return port connected to the passageway and an axially movable valve device which allows in a first position fluid flow between the outlet port and the ret ...


6
Matthew H Tibbitts, Andrew D Gledhill, David S Innes: Hydraulic valves with integral seals. Aker Subsea, Nixon & Vanderhye PC, August 26, 2014: US08813786

A hydraulic valve comprises a plurality of ports, which communicate with a passageway, and a valve member movable in the passageway to control the communication between the ports. The valve member carries a lateral shear seal which is integral with the valve member and engages the passageway. In one ...


7
Albert C Odell, Andrew D Gledhill, Michael Tague Smalley, Mark S Fuller: Pressure activated release member for an expandable drillbit. Patterson & Sheridan, March 9, 2006: US20060048972-A1

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 ...


8
Matthew H Tibbitts, Andrew D Gledhill, David S Innes: Electrically operated hydraulic valve. Aker Kvaerner Subsea, Nixon & Vanderhye PC, March 18, 2010: US20100065766-A1

An electrically operated hydraulic valve comprises a valve assembly that provides a common valve passageway, an inlet port, an outlet port and a return port connected to the passageway and an axially movable valve device which allows in a first position fluid flow between the outlet port and the ret ...


9
Andrew E Massie, Andrew D Gledhill: Combined control valve and coupler. Aker Subsea, July 21, 2011: US20110175003-A1

A control valve which comprises a body (2) including an internal passageway (3) and is constituted at one end (6) as a coupler which includes a valve poppet (7) openable to allow fluid access to or from the passageway past the poppet. The body defines at least one lateral port (11 or 12). A valve sp ...