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Inventor

BERCKENHOFF MICHAEL WAYNE

US11 patents
⚠️ This page may combine multiple inventors who share the name “BERCKENHOFF MICHAEL WAYNE”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

HYDRIL CO

3 patents
US6554247B2Apr 29, 2003

Quick release blowout preventer bonnet

HYDRIL CO70 citations95
US7096960B2Aug 29, 2006

Mounts for blowout preventer bonnets

HYDRIL CO16 citations92
US7281586B2Oct 16, 2007

Mounts for blowout preventer bonnets

HYDRIL CO8 citations73

HYDRIL USA MFG LLC

3 patents
US7975761B2Jul 12, 2011

Method and device with biasing force for sealing a well

HYDRIL USA MFG LLC10 citations79
US7802626B2Sep 28, 2010

Mounts for blowout preventer bonnets and methods of use

HYDRIL USA MFG LLC4 citations73
US7413019B2Aug 19, 2008

Mounts for blowout preventer bonnets

HYDRIL USA MFG LLC5 citations61

HYDRIL CO LP

2 patents
US7246666B2Jul 24, 2007

Mounts for blowout preventer bonnets

HYDRIL CO LP15 citations92
US7121348B2Oct 17, 2006

Mounts for blowout preventer bonnets

HYDRIL CO LP10 citations81

HYDRIL COMPANY L P

1 patent
US6845959B2Jan 25, 2005

Quick release blowout preventer bonnet

HYDRIL COMPANY L P24 citations87

HEMPHILL EDWARD RYAN

1 patent
US8230930B2Jul 31, 2012

Mounts for blowout preventer bonnets and methods of use

HEMPHILL EDWARD RYAN6 citations79

BERCKENHOFF MICHAEL WAYNE

1 patent
US8702106B2Apr 22, 2014

Pressure energized radial seal

BERCKENHOFF MICHAEL WAYNE9 citations78