Inventor
REN CHUNQIAO
CN10 patents
⚠️ This page may combine multiple inventors who share the name “REN CHUNQIAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NAT OILWELL VARCO LP
5 patentsUS9163462B2Oct 20, 2015
Bi-directionally raisable drilling rig mast
NAT OILWELL VARCO LP22 citations91
US8904716B2Dec 9, 2014
Bi-directionally raisable drilling rig mast
NAT OILWELL VARCO LP29 citations91
US8863449B2Oct 21, 2014
Substructure of a mobile drilling rig with a movable center floor section
NAT OILWELL VARCO LP19 citations91
US8047303B2Nov 1, 2011
Drilling rig drawworks installation
NAT OILWELL VARCO LP18 citations91
US9488013B2Nov 8, 2016
Bi-directionally raisable drilling rig mast
NAT OILWELL VARCO LP1 citations61
DONNALLY ROBERT BENJAMIN
4 patentsUS8468753B2Jun 25, 2013
Drilling rigs and erection methods
DONNALLY ROBERT BENJAMIN63 citations95
US8250816B2Aug 28, 2012
Drilling rig structure installation and methods
DONNALLY ROBERT BENJAMIN74 citations93
US8549815B2Oct 8, 2013
Drilling rig masts and methods of assembly and erecting masts
DONNALLY ROBERT BENJAMIN45 citations92
US9441423B2Sep 13, 2016
Drilling rig masts and methods of assembly and erection
DONNALLY ROBERT BENJAMIN23 citations90