Inventor

GLEDHILL ANDREW D

GB5 patents

⚠️ This page may combine multiple inventors who share the name “GLEDHILL ANDREW D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

WEATHERFORD LAMB

2 patents

US6953096B2Oct 11, 2005

Expandable bit with secondary release device

WEATHERFORD LAMB150 citations93

US7131504B2Nov 7, 2006

Pressure activated release member for an expandable drillbit

WEATHERFORD LAMB17 citations82

TIBBITTS MATTHEW H

2 patents

US8210208B2Jul 3, 2012

Electrically operated hydraulic valve

TIBBITTS MATTHEW H5 citations54

US8813786B2Aug 26, 2014

Hydraulic valves with integral seals

TIBBITTS MATTHEW H0 citations33

MASSIE ANDREW E

1 patent

US8430125B2Apr 30, 2013

Combined control valve and coupler

MASSIE ANDREW E4 citations47