P

Inventor

LOGAN DEREK W

CA14 patents
⚠️ This page may combine multiple inventors who share the name “LOGAN DEREK W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

RYAN ENERGY TECHNOLOGIES INC

3 patents
US6158532ADec 12, 2000

Subassembly electrical isolation connector for drill rod

RYAN ENERGY TECHNOLOGIES INC100 citations96
US6050353AApr 18, 2000

Subassembly electrical isolation connector for drill rod

RYAN ENERGY TECHNOLOGIES INC74 citations94
US6367323B1Apr 9, 2002

Dynamic pressure device for oil drill systems

RYAN ENERGY TECHNOLOGIES INC25 citations89

CAMWELL PAUL L

2 patents
US8115651B2Feb 14, 2012

Drill string telemetry methods and apparatus

CAMWELL PAUL L71 citations96
US8308199B2Nov 13, 2012

Electrical isolation connector for electromagnetic gap sub

CAMWELL PAUL L12 citations81

EXTREME ENGINEERING LTD

2 patents
US6902414B2Jun 7, 2005

Harsh environment rotatable connector

EXTREME ENGINEERING LTD59 citations94
US7462957B2Dec 9, 2008

Multi-conductor plug and socket apparatus

EXTREME ENGINEERING LTD23 citations90

SCHLUMBERGER TECHNOLOGY CORP

2 patents
US7900968B2Mar 8, 2011

Electrical isolation connector for electromagnetic gap sub

SCHLUMBERGER TECHNOLOGY CORP16 citations90
US7821178B2Oct 26, 2010

Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors

SCHLUMBERGER TECHNOLOGY CORP2 citations61

DOPF ANTHONY R

2 patents
US8648733B2Feb 11, 2014

Electromagnetic telemetry assembly with protected antenna

DOPF ANTHONY R12 citations80
US8624464B2Jan 7, 2014

Brush and brush housing arrangement to mitigate hydrodynamic brush lift in fluid-immersed electric motors

DOPF ANTHONY R1 citations48

XACT DOWNHOLE TELEMETRY INC

1 patent
US6956791B2Oct 18, 2005

Apparatus for receiving downhole acoustic signals

XACT DOWNHOLE TELEMETRY INC65 citations94

CLARK BRIAN

1 patent
US9022144B2May 5, 2015

Drill bit assembly having electrically isolated gap joint for measurement of reservoir properties

CLARK BRIAN3 citations61

DRUMHELLER DOUGLAS S

1 patent
US8270251B2Sep 18, 2012

Acoustic isolator

DRUMHELLER DOUGLAS S4 citations60