Inventor · disambiguated record
Russell A. Johnston
Also filed as: JOHNSTON RUSSELL A · JOHNSTON RUSSELL ALAN
17 granted patents·5 pending applications·463 citations·filing 1976–2012
95Inventor score
Top patents by PatentIndex Score
22 records- 0191US4399871AChemical injection valve with openable bypassOTIS ENG CO·Filed 1981·Granted Aug 23, 1983·123 cites·27 claims
- 0284US6973970B2Apparatus and methods for establishing secondary hydraulics in a downhole toolSCHLUMBERGER TECHNOLOGY CORP·Filed 2003·Granted Dec 13, 2005·72 cites·22 claims
- 0373US8002040B2System and method for controlling flow in a wellboreSCHLUMBERGER TECHNOLOGY CORP·Filed 2008·Granted Aug 23, 2011·12 cites·16 claims
- 0473US6079497APressure equalizing safety valve for subterranean wellsCAMCO INT·Filed 1998·Granted Jun 27, 2000·67 cites·42 claims
- 0571US5598864ASubsurface safety valveCAMCO INT·Filed 1994·Granted Feb 4, 1997·54 cites·15 claims
- 0657US5190106AWell injection valve retrievable chokeCAMCO INT·Filed 1991·Granted Mar 2, 1993·30 cites·3 claims
- 0748US7740075B2Pressure relief actuated valvesSCHLUMBERGER TECHNOLOGY CORP·Filed 2008·Granted Jun 22, 2010·2 cites·19 claims
- 0848US4407364ALanding nipple for pumpdown well completion systemOTIS ENG CO·Filed 1981·Granted Oct 4, 1983·16 cites·10 claims
- 0946US4616704AControl line protector for use on a well tubular memberCAMCO INC·Filed 1985·Granted Oct 14, 1986·17 cites·10 claims
- 1044US4142597AMechanical detent jarsOTIS ENG CO·Filed 1977·Granted Mar 6, 1979·11 cites·14 claims
- 1144US2011253392A1System and method for controlling flow in a wellboreSCHLUMBERGER TECHNOLOGY CORP·Filed 2011·Application pending·0 cites
- 1243US4498533AKeyhole mandrel with insert pocketCAMCO INC·Filed 1984·Granted Feb 12, 1985·12 cites·5 claims
- 1340US7621331B2Fluid communication nipple having an interior passageway with an interior wall section that may be opened to establish fluid communication with the passagewaySCHLUMBERGER TECHNOLOGY CORP·Filed 2005·Granted Nov 24, 2009·1 cites·15 claims
- 1440US4541482AOffset open bore sidepocket mandrelCAMCO INC·Filed 1984·Granted Sep 17, 1985·10 cites·3 claims
- 1539US4651822ADump and kill valve for a sidepocket mandrelCAMCO INC·Filed 1986·Granted Mar 24, 1987·12 cites·9 claims
- 1639US2013062071A1Minimal travel flow control deviceRYTLEWSKI GARY L·Filed 2011·Application pending·0 cites
- 1738US5975212ASurface controlled subsurface safety valve downstop sealCAMCO INT·Filed 1999·Granted Nov 2, 1999·13 cites·20 claims
- 1838US2013341034A1Flapper retention devices and methodsBIDDICK DAVID JAMES·Filed 2012·Application pending·0 cites
- 1937US4538681ASoft set and pull latch and setting tool for a well measuring instrumentCAMCO INC·Filed 1984·Granted Sep 3, 1985·8 cites·5 claims
- 2037US2011083858A1Downhole tool actuation devices and methodsSCHLUMBERGER TECHNOLOGY CORP·Filed 2010·Application pending·0 cites
- 2136US2012031624A1Flow tube for use in subsurface valvesGOUGHNOUR PAUL G·Filed 2010·Application pending·0 cites
- 2231US4119147APumpdown safety valveOTIS ENG CO·Filed 1976·Granted Oct 10, 1978·3 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →