Assignee
BOWEN TOOLS INC
26 granted patents·1,171 citations·filing 1975–1995
Top patents by PatentIndex Score
26 records- 0196US5388651ATop drive unit torque break-out systemBOWEN TOOLS INC·Filed 1993·Granted Feb 14, 1995·225 cites·29 claims
- 0291US5501286AMethod and apparatus for displacing a top drive torque trackBOWEN TOOLS INC·Filed 1994·Granted Mar 26, 1996·137 cites·14 claims
- 0388US4715456ASlips for well pipeBOWEN TOOLS INC·Filed 1986·Granted Dec 29, 1987·148 cites·18 claims
- 0487US4027816ASeal assemblyBOWEN TOOLS INC·Filed 1975·Granted Jun 7, 1977·42 cites·3 claims
- 0584US4558842AConnector for joining blowout preventer membersBOWEN TOOLS INC·Filed 1985·Granted Dec 17, 1985·80 cites·6 claims
- 0682US4135068ADead man safety assemblyBOWEN TOOLS INC·Filed 1976·Granted Jan 16, 1979·46 cites·14 claims
- 0780US4076436AStress relieved tool elementsBOWEN TOOLS INC·Filed 1976·Granted Feb 28, 1978·46 cites·6 claims
- 0877US3955634AHydraulic well jarBOWEN TOOLS INC·Filed 1975·Granted May 11, 1976·43 cites·15 claims
- 0974US4877217AFail-safe blowout preventerBOWEN TOOLS INC·Filed 1988·Granted Oct 31, 1989·46 cites·20 claims
- 1072US5381867ATop drive torque track and method of installing sameBOWEN TOOLS INC·Filed 1994·Granted Jan 17, 1995·49 cites·7 claims
- 1169US4332062ABowl structureBOWEN TOOLS INC·Filed 1980·Granted Jun 1, 1982·35 cites·6 claims
- 1268US4398729ABlowout preventer inner ram seal assemblyBOWEN TOOLS INC·Filed 1982·Granted Aug 16, 1983·34 cites·13 claims
- 1366US3987858AHydromechanical drilling jarBOWEN TOOLS INC·Filed 1975·Granted Oct 26, 1976·28 cites·4 claims
- 1463US4648447ACasing scraperBOWEN TOOLS INC·Filed 1985·Granted Mar 10, 1987·34 cites·13 claims
- 1563US4456215AInner seal and support rod assembly for high pressure blowout preventersBOWEN TOOLS INC·Filed 1982·Granted Jun 26, 1984·31 cites·13 claims
- 1660US4369977ASeal for an overshot and a method of doing sameBOWEN TOOLS INC·Filed 1980·Granted Jan 25, 1983·25 cites·10 claims
- 1759US4439167AShock absorber assemblyBOWEN TOOLS INC·Filed 1982·Granted Mar 27, 1984·26 cites·7 claims
- 1847US4331006AShock absorber assemblyBOWEN TOOLS INC·Filed 1980·Granted May 25, 1982·15 cites·11 claims
- 1945US5584353AWell jar accelerator with expansion chamberBOWEN TOOLS INC·Filed 1995·Granted Dec 17, 1996·25 cites·26 claims
- 2041US4080761AControl valve assemblyBOWEN TOOLS INC·Filed 1977·Granted Mar 28, 1978·9 cites·14 claims
- 2139US4706745ALock-down releasing spear assemblyBOWEN TOOLS INC·Filed 1986·Granted Nov 17, 1987·16 cites·8 claims
- 2239US4387885AShock absorber assembly for absorbing shocks encountered by a drill stringBOWEN TOOLS INC·Filed 1982·Granted Jun 14, 1983·11 cites·11 claims
- 2333US5163513ACircle threadform for marine riser top jointBOWEN TOOLS INC·Filed 1991·Granted Nov 17, 1992·9 cites·11 claims
- 2430US5251493ALoad cell for well tubulars or the likeBOWEN TOOLS INC·Filed 1991·Granted Oct 12, 1993·3 cites·2 claims
- 2528US4793410ALoad detection and indicator apparatus for well tubing or the likeBOWEN TOOLS INC·Filed 1988·Granted Dec 27, 1988·5 cites·12 claims
- 2626US4842058ALoad detection and indicator apparatus for well tubing or the likeBOWEN TOOLS INC·Filed 1988·Granted Jun 27, 1989·3 cites·11 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →