Assignee
PRIDECO INC
US6 patents
Top patents by PatentIndex Score
US5165491ANov 24, 1992
Method of horizontal drilling
PRIDECO INC117 citations96
US5358285AOct 25, 1994
Stress relief groove for drill pipe
PRIDECO INC27 citations91
US5286069AFeb 15, 1994
Stress relief groove for drill pipe
PRIDECO INC36 citations91
US5148876ASep 22, 1992
Lightweight drill pipe
PRIDECO INC31 citations91
US5184495AFeb 9, 1993
Method of internally and externally upsetting the end of a metal tube
PRIDECO INC72 citations85
US5479721AJan 2, 1996
Method and apparatus for measuring the length (MIU) of the internal taper of an internally upset drill pipe tube
PRIDECO INC14 citations59