Inventor · disambiguated record

Guihua Luan

Also filed as: LUAN GUIHUA

1 granted patent·34 citations·filing 1992–1992

45Inventor score

Technology areasE21B

Files withDRILLING TECHNOLOGY RESEARCH I1

Top patents by PatentIndex Score

1 record

0147US5390747AWell rig lift system and a hydraulic energy-storing well rig lift systemDRILLING TECHNOLOGY RESEARCH I·Filed 1992·Granted Feb 21, 1995·34 cites·30 claims

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