Inventor · disambiguated record
Derry D. Sparlin
Also filed as: SPARLIN DERRY D
22 granted patents·834 citations·filing 1974–1994
97Inventor score
Top patents by PatentIndex Score
22 records- 0193US5476143AWell screen having slurry flow pathsNAGAOKA KK·Filed 1994·Granted Dec 19, 1995·214 cites·17 claims
- 0291US4202411AAcid soluble coating for well screensBAKER INT CORP·Filed 1978·Granted May 13, 1980·55 cites·9 claims
- 0390US4085801AControl of incompetent formations with thickened acid-settable resin compositionsCONTINENTAL OIL CO·Filed 1976·Granted Apr 25, 1978·46 cites·17 claims
- 0489US4085802AUse of thickened oil for sand control processesCONTINENTAL OIL CO·Filed 1977·Granted Apr 25, 1978·42 cites·19 claims
- 0588US4771829AWell liner with selective isolation screenSPARLIN DERRY D·Filed 1987·Granted Sep 20, 1988·88 cites·27 claims
- 0683US5355948APermeable isolation sectioned screenSPARLIN DERRY D·Filed 1992·Granted Oct 18, 1994·48 cites·27 claims
- 0780US5787980AWell screen having a uniform outer diameterNAGAOKA KK·Filed 1994·Granted Aug 4, 1998·72 cites·14 claims
- 0878US4034811AMethod for sealing a permeable subterranean formationCONTINENTAL OIL CO·Filed 1975·Granted Jul 12, 1977·31 cites·6 claims
- 0977US5355949AWell liner with dual concentric half screensSPARLIN DERRY D·Filed 1993·Granted Oct 18, 1994·66 cites·40 claims
- 1067US4105618AControl of incompetent formations with thickened compositions containing base-settable resinCONTINENTAL OIL CO·Filed 1977·Granted Aug 8, 1978·17 cites·9 claims
- 1165US5307984AMethod of manufacturing a selective isolation screenNAGAOKA KK·Filed 1992·Granted May 3, 1994·41 cites·9 claims
- 1260US5450898AGravity enhanced maintenance screenFiled 1994·Granted Sep 19, 1995·22 cites·10 claims
- 1358US4239084AAcid soluble coating for well screensBAKER INT CORP·Filed 1979·Granted Dec 16, 1980·20 cites·3 claims
- 1453US3961972AHigh strength silicate form and method for producing sameCONTINENTAL OIL CO·Filed 1975·Granted Jun 8, 1976·11 cites·17 claims
- 1550US4064940AWater control with polymersCONTINENTAL OIL CO·Filed 1976·Granted Dec 27, 1977·10 cites·6 claims
- 1650US3949220AMethod for detecting and locating sand producing zones in friable, unconsolidated sandstone formations of subterranean formationsCONTINENTAL OIL CO·Filed 1974·Granted Apr 6, 1976·7 cites·11 claims
- 1749US5246158AMethod of manufacturing a selective isolation screenNAGAOKA KK·Filed 1992·Granted Sep 21, 1993·22 cites·6 claims
- 1841US3940612AMethod for detecting and locating water-producing zones and/or water thief zones in subterranean formationsCONTINENTAL OIL CO·Filed 1974·Granted Feb 24, 1976·4 cites·12 claims
- 1938US4110275AControl of incompetent formations with thickened acid-settable resin compositionsCONTINENTAL OIL CO·Filed 1977·Granted Aug 29, 1978·4 cites·10 claims
- 2037US4062403APump-down sand washing toolCONTINENTAL OIL CO·Filed 1976·Granted Dec 13, 1977·7 cites·7 claims
- 2133US4027730ASeal assembly for fluid injection pump-down toolsCONTINENTAL OIL CO·Filed 1976·Granted Jun 7, 1977·4 cites·5 claims
- 2233US3939912AMethod for reducing the production of water from oil wellsCONTINENTAL OIL CO·Filed 1975·Granted Feb 24, 1976·3 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →