Inventor
CAMPBELL ANDREW B
US13 patents
⚠️ This page may combine multiple inventors who share the name “CAMPBELL ANDREW B”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VARCO INT
7 patentsUS4365676ADec 28, 1982
Method and apparatus for drilling laterally from a well bore
VARCO INT118 citations96
US4479547AOct 30, 1984
Well pipe jack
VARCO INT30 citations92
US4476936AOct 16, 1984
Jacking mechanism supported by a wellhead
VARCO INT37 citations92
US4595062AJun 17, 1986
Well casing jack mechanism
VARCO INT22 citations82
US4421175ADec 20, 1983
Method of drilling and casing a well
VARCO INT20 citations82
US4465131AAug 14, 1984
Well casing jack mechanism
VARCO INT7 citations74
US4437515AMar 20, 1984
Positioning of well pipe jack in a rig
VARCO INT12 citations74
TRIANGLE BRASS MANUFACTURING C
4 patentsUS5076620ADec 31, 1991
Flush bolt mechanism for double doors
TRIANGLE BRASS MANUFACTURING C36 citations92
US5033234AJul 23, 1991
Door coordinator
TRIANGLE BRASS MANUFACTURING C28 citations92
US5004277AApr 2, 1991
Flush bolt mechanism for double doors
TRIANGLE BRASS MANUFACTURING C29 citations92
US4986583AJan 22, 1991
Door-latch opener
TRIANGLE BRASS MANUFACTURING C54 citations92