Inventor
PETERMANN STEVEN G
US14 patents
Patents
14 patentsUS4830105AMay 16, 1989
Centralizer for wellbore apparatus
ATLANTIC RICHFIELD CO155 citations98
US5209765AMay 11, 1993
Centrifugal separator systems for multi-phase fluids
ATLANTIC RICHFIELD CO63 citations96
US5092423AMar 3, 1992
Downhole seismic array system
ATLANTIC RICHFIELD CO60 citations96
US4766955AAug 30, 1988
Wellbore fluid sampling apparatus
ATLANTIC RICHFIELD CO57 citations96
US4685516AAug 11, 1987
Apparatus for operating wireline tools in wellbores
ATLANTIC RICHFIELD CO75 citations96
US5029614AJul 9, 1991
Tandem seal system for testing pipelines
ATLANTIC RICHFIELD CO56 citations95
US5063542ANov 5, 1991
Piezoelectric transducer with displacement amplifier
ATLANTIC RICHFIELD CO94 citations94
US4819760AApr 11, 1989
Locking arm for well tool
ATLANTIC RICHFIELD CO24 citations92
US4876672AOct 24, 1989
Ultrasonic logging tool with rotating exposed transducer
ATLANTIC RICHFIELD CO51 citations91
US4706744ANov 17, 1987
Wireline tool connector
ATLANTIC RICHFIELD CO30 citations91
US5115196AMay 19, 1992
Girth weld detection system for pipeline survey pig
ATLANTIC RICHFIELD CO39 citations88
US5160814ANov 3, 1992
Hydraulically-actuated downhole seismic source
ATLANTIC RICHFIELD CO14 citations73
US5020036AMay 28, 1991
Magnetostrictive transducer for logging tool
ATLANTIC RICHFIELD CO7 citations73
US4835876AJun 6, 1989
Instrument chassis and body supports for pipeline survey pig
ATLANTIC RICHFIELD CO15 citations69