Inventor · disambiguated record
Ervin Randermann, Jr.
Also filed as: RANDERMANN ERVIN · RANDERMANN JR ERVIN
7 granted patents·374 citations·filing 1976–1995
89Inventor score
Technology areasE21B
Top patents by PatentIndex Score
7 records- 0187US4009753ASubsea master valve apparatusSCHLUMBERGER TECHNOLOGY CORP·Filed 1976·Granted Mar 1, 1977·78 cites·16 claims
- 0282US4100969ATubing tester valve apparatusSCHLUMBERGER TECHNOLOGY CORP·Filed 1977·Granted Jul 18, 1978·51 cites·13 claims
- 0378US4913231ATool for treating subterranean wellsDOWELL SCHLUMBERGER·Filed 1988·Granted Apr 3, 1990·56 cites·26 claims
- 0476US5058673AHydraulically set packer useful with independently set straddle packers including an inflate/deflate valve and a hydraulic ratchet associated with the straddle packersSCHLUMBERGER TECHNOLOGY CORP·Filed 1990·Granted Oct 22, 1991·62 cites·24 claims
- 0571US5020592ATool for treating subterranean wellsDOWELL SCHLUMBERGER INC·Filed 1989·Granted Jun 4, 1991·42 cites·9 claims
- 0668US5361839AFull bore sampler including inlet and outlet ports flanking an annular sample chamber and parameter sensor and memory apparatus disposed in said sample chamberSCHLUMBERGER TECHNOLOGY CORP·Filed 1993·Granted Nov 8, 1994·47 cites·27 claims
- 0757US5687795APacker locking apparatus including a time delay apparatus for locking a packer against premature setting when entering a liner in a wellboreSCHLUMBERGER TECHNOLOGY CORP·Filed 1995·Granted Nov 18, 1997·38 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →