Membership
Tour
Register
Log in
Mark A. MITCHELL
Follow
Person
Pearland, TX, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Rotating continuous flow sub
Patent number
9,416,599
Issue date
Aug 16, 2016
Weatherford Technology Holdings, LLC
Thomas F. Bailey
E21 - EARTH DRILLING MINING
Information
Patent Grant
Dual gradient managed pressure drilling
Patent number
9,328,575
Issue date
May 3, 2016
Weatherford Technology Holdings, LLC
Guy F. Feasey
E21 - EARTH DRILLING MINING
Information
Patent Grant
Repaired wear and buckle resistant drill pipe and related methods
Patent number
9,085,942
Issue date
Jul 21, 2015
Weatherford Technology Holdings, LLC
Ghazi J. Hashem
E21 - EARTH DRILLING MINING
Information
Patent Grant
Rotating continuous flow sub
Patent number
8,627,890
Issue date
Jan 14, 2014
Weatherford/Lamb, Inc.
Thomas F. Bailey
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
ROTATING CONTINUOUS FLOW SUB
Publication number
20140144706
Publication date
May 29, 2014
WEATHERFORD/LAMB, INC.
Thomas F. BAILEY
E21 - EARTH DRILLING MINING
Information
Patent Application
DUAL GRADIENT MANAGED PRESSURE DRILLING
Publication number
20130192841
Publication date
Aug 1, 2013
Guy F. Feasey
E21 - EARTH DRILLING MINING
Information
Patent Application
REPAIRED WEAR AND BUCKLE RESISTANT DRILL PIPE AND RELATED METHODS
Publication number
20130098690
Publication date
Apr 25, 2013
Ghazi J. Hashem
E21 - EARTH DRILLING MINING
Information
Patent Application
ROTATING CONTINUOUS FLOW SUB
Publication number
20110155379
Publication date
Jun 30, 2011
THOMAS F. BAILEY
E21 - EARTH DRILLING MINING