Inventor
ZUNKEL GARY D
US20 patents
⚠️ This page may combine multiple inventors who share the name “ZUNKEL GARY D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HALLIBURTON CO
19 patentsUS4903765AFeb 27, 1990
Delayed opening fluid sampler
HALLIBURTON CO92 citations96
US4583593AApr 22, 1986
Hydraulically activated liner setting device
HALLIBURTON CO110 citations96
US4883123ANov 28, 1989
Above packer perforate, test and sample tool and method of use
HALLIBURTON CO58 citations95
US4691779ASep 8, 1987
Hydrostatic referenced safety-circulating valve
HALLIBURTON CO72 citations95
US4664188AMay 12, 1987
Retrievable well packer
HALLIBURTON CO61 citations95
US4793411ADec 27, 1988
Retrievable gravel packer and retrieving tool
HALLIBURTON CO29 citations92
US4736798AApr 12, 1988
Rapid cycle annulus pressure responsive tester valve
HALLIBURTON CO33 citations92
US4726419AFeb 23, 1988
Single zone gravel packing system
HALLIBURTON CO31 citations92
US4635716AJan 13, 1987
Gravel packer
HALLIBURTON CO26 citations92
US4633943AJan 6, 1987
Gravel packer
HALLIBURTON CO26 citations92
US4627491ADec 9, 1986
Well packer
HALLIBURTON CO31 citations92
US4619325AOct 28, 1986
Well surging method and system
HALLIBURTON CO36 citations92
US4606408AAug 19, 1986
Method and apparatus for gravel-packing a well
HALLIBURTON CO53 citations92
US4567944AFeb 4, 1986
Retrievable straddle packer
HALLIBURTON CO48 citations87
US4877086AOct 31, 1989
Pressure limiter for a downhole pump and testing apparatus
HALLIBURTON CO22 citations82
US4789271ADec 6, 1988
Remote fluid transfer system and method for sub-sea baseplates and templates
HALLIBURTON CO24 citations82
US4628993ADec 16, 1986
Foam gravel packer
HALLIBURTON CO21 citations82
US4638859AJan 27, 1987
Gravel packer
HALLIBURTON CO23 citations81
US4633944AJan 6, 1987
Gravel packer
HALLIBURTON CO18 citations72