Inventor
BOYADJIEFF GEORGE I
36 patents
⚠️ This page may combine multiple inventors who share the name “BOYADJIEFF GEORGE I”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VARCO INT
31 patentsUS4765401AAug 23, 1988
Apparatus for handling well pipe
VARCO INT333 citations99
US4709766ADec 1, 1987
Well pipe handling machine
VARCO INT174 citations99
US4625796ADec 2, 1986
Well pipe stabbing and back-up apparatus
VARCO INT175 citations99
US4605077AAug 12, 1986
Top drive drilling systems
VARCO INT224 citations99
US4529045AJul 16, 1985
Top drive drilling unit with rotatable pipe support
VARCO INT187 citations99
US4449596AMay 22, 1984
Drilling of wells with top drive unit
VARCO INT335 citations99
US4696207ASep 29, 1987
Well pipe handling machine
VARCO INT68 citations96
US4489794ADec 25, 1984
Link tilting mechanism for well rigs
VARCO INT119 citations96
US4458768AJul 10, 1984
Top drive well drilling apparatus
VARCO INT78 citations96
US4421179ADec 20, 1983
Top drive well drilling apparatus
VARCO INT117 citations96
US4365676ADec 28, 1982
Method and apparatus for drilling laterally from a well bore
VARCO INT118 citations96
US4348920ASep 14, 1982
Well pipe connecting and disconnecting apparatus
VARCO INT105 citations96
US4023449AMay 17, 1977
Tool for connecting and disconnecting well pipe
VARCO INT118 citations96
US3961399AJun 8, 1976
Power slip unit
VARCO INT81 citations96
US5451129ASep 19, 1995
Pipe transfer system
VARCO INT71 citations95
US4610465ASep 9, 1986
Structure and use of remotely releasable pile connectors
VARCO INT41 citations93
US4405115ASep 20, 1983
Gripping jack system
VARCO INT28 citations93
US4051587AOct 4, 1977
Pile handling apparatus and methods
VARCO INT37 citations93
US4535852AAug 20, 1985
Drill string valve actuator
VARCO INT52 citations92
US4479547AOct 30, 1984
Well pipe jack
VARCO INT30 citations92
US4476936AOct 16, 1984
Jacking mechanism supported by a wellhead
VARCO INT37 citations92
US4437524AMar 20, 1984
Well drilling apparatus
VARCO INT28 citations89
US4595062AJun 17, 1986
Well casing jack mechanism
VARCO INT22 citations82
US4421175ADec 20, 1983
Method of drilling and casing a well
VARCO INT20 citations82
US4084385AApr 18, 1978
Pile handing methods
VARCO INT16 citations82
US4446761AMay 8, 1984
Pipe spinning tool
VARCO INT25 citations76
US4465131AAug 14, 1984
Well casing jack mechanism
VARCO INT7 citations74
US4437515AMar 20, 1984
Positioning of well pipe jack in a rig
VARCO INT12 citations74
US3990508ANov 9, 1976
Remotely operated well safety valves
VARCO INT7 citations73
US4203182AMay 20, 1980
Slip assembly
VARCO INT19 citations70
US4346631AAug 31, 1982
Well pipe spinning and torqueing apparatus
VARCO INT1 citations52