Inventor · disambiguated record
Robert D. Sydansk
Also filed as: SYDANSK ROBERT D
55 granted patents·2,285 citations·filing 1976–1998
99Inventor score
Top patents by PatentIndex Score
55 records- 0198US6189615B1Application of a stabilized polymer gel to an alkaline treatment region for improved hydrocarbon recoveryMARATHON OIL CO·Filed 1998·Granted Feb 20, 2001·301 cites·42 claims
- 0297US4779680AHydraulic fracturing process using a polymer gelMARATHON OIL CO·Filed 1987·Granted Oct 25, 1988·172 cites·14 claims
- 0397US4683949AConformance improvement in a subterranean hydrocarbon-bearing formation using a polymer gelMARATHON OIL CO·Filed 1986·Granted Aug 4, 1987·183 cites·62 claims
- 0494US5129457AEnhanced liquid hydrocarbon recovery processMARATHON OIL CO·Filed 1991·Granted Jul 14, 1992·112 cites·66 claims
- 0590US4844168ADelayed in situ crosslinking of acrylamide polymers for oil recovery applications in high-temperature formationsMARATHON OIL CO·Filed 1988·Granted Jul 4, 1989·59 cites·18 claims
- 0687US4744418ADelayed polyacrylamide gelation process for oil recovery applicationsMARATHON OIL CO·Filed 1986·Granted May 17, 1988·62 cites·30 claims
- 0785US5842519AProcess for reducing hydrocarbon leakage from a subterranean storage cavernMARATHON OIL CO·Filed 1997·Granted Dec 1, 1998·40 cites·45 claims
- 0885US5358046AOil recovery process utilizing a supercritical carbon dioxide emulsionMARATHON OIL CO·Filed 1993·Granted Oct 25, 1994·51 cites·35 claims
- 0985US5105884AFoam for improving sweep efficiency in subterranean oil-bearing formationsMARATHON OIL CO·Filed 1990·Granted Apr 21, 1992·52 cites·45 claims
- 1085US4724906AWellbore cementing process using a polymer gelMARATHON OIL CO·Filed 1986·Granted Feb 16, 1988·42 cites·27 claims
- 1184US5706895APolymer enhanced foam workover, completion, and kill fluidsMARATHON OIL CO·Filed 1995·Granted Jan 13, 1998·77 cites·33 claims
- 1284US4995461AWell kill treatment for oil field wellbore operationsMARATHON OIL CO·Filed 1989·Granted Feb 26, 1991·40 cites·21 claims
- 1384US4730675APlugging an abandoned well with a polymer gelMARATHON OIL CO·Filed 1986·Granted Mar 15, 1988·55 cites·14 claims
- 1483US5415229AHydrocarbon recovery process utilizing a gel prepared from a polymer and a preformed crosslinking agentMARATHON OIL CO·Filed 1994·Granted May 16, 1995·43 cites·27 claims
- 1582US5711376AHydraulic fracturing processMARATHON OIL CO·Filed 1995·Granted Jan 27, 1998·52 cites·29 claims
- 1681US4770245ARate-controlled polymer gelation process for oil recovery applicationsMARATHON OIL CO·Filed 1986·Granted Sep 13, 1988·34 cites·38 claims
- 1781US4730674APlugging a tubing/casing annulus in a wellbore with a polymer gelMARATHON OIL CO·Filed 1986·Granted Mar 15, 1988·52 cites·12 claims
- 1881US4505751AProcess for utilizing a silicate/silica cement in oil field applicationsMARATHON OIL CO·Filed 1983·Granted Mar 19, 1985·32 cites·14 claims
- 1979US4957166ALost circulation treatment for oil field drilling operationsMARATH OIL COMPANY·Filed 1989·Granted Sep 18, 1990·61 cites·47 claims
- 2077US5421411AProcess for reducing permeability in a subterranean hydrocarbon-bearing formation utilizing a gelation solution having a controlled gelation rateMARATHON OIL CO·Filed 1994·Granted Jun 6, 1995·33 cites·41 claims
- 2176US5495891AFoamed gel employed as a drilling fluid, a lost circulation fluid, or a combined drilling/lost circulation fluidMARATHON OIL CO·Filed 1994·Granted Mar 5, 1996·36 cites·24 claims
- 2276US4989673ALost circulation fluid for oil field drilling operationsMARATHON OIL CO·Filed 1989·Granted Feb 5, 1991·46 cites·18 claims
- 2376US4722397AWell completion process using a polymer gelMARATHON OIL CO·Filed 1986·Granted Feb 2, 1988·61 cites·42 claims
- 2475US5780395AFoam for improving sweep efficiency in subterranean oil-bearing formationsMARATHON OIL CO·Filed 1992·Granted Jul 14, 1998·32 cites·5 claims
- 2575US4723605AAccelerated polymer gelation process for oil recovery applicationsMARATHON OIL CO·Filed 1986·Granted Feb 9, 1988·27 cites·19 claims
- 2675US4625802APotassium silicate clay stabilization processMARATHON OIL CO·Filed 1985·Granted Dec 2, 1986·27 cites·28 claims
- 2773US5834406AFoamed gel for permeability reduction or mobility control in a subterranean hydrocarbon-bearing formationMARATHON OIL CO·Filed 1996·Granted Nov 10, 1998·37 cites·24 claims
- 2873US5372462APolymer enhanced foam for blocking fluid flow in soilMARATHON OIL CO·Filed 1993·Granted Dec 13, 1994·25 cites·18 claims
- 2973US4947935AKill fluid for oil field operationsMARATHON OIL CO·Filed 1989·Granted Aug 14, 1990·24 cites·27 claims
- 3073US4744419AConformance improvement in a subterranean hydrocarbon-bearing formation using a crosslinked polymerMARATHON OIL CO·Filed 1986·Granted May 17, 1988·25 cites·32 claims
- 3171US5513712APolymer enhanced foam drilling fluidMARATHON OIL CO·Filed 1994·Granted May 7, 1996·30 cites·11 claims
- 3270US5082057ASand consolidation treatment for a hydrocarbon production well bore using an overdisplacement fluidMARATHON OIL CO·Filed 1990·Granted Jan 21, 1992·24 cites·8 claims
- 3370US4022276AMethod of selecting oil recovery fluids using nuclear magnetic resonance measurementsMARATHON OIL CO·Filed 1976·Granted May 10, 1977·30 cites·8 claims
- 3467US4494606AProcess for improving vertical conformance in a near well bore environmentMARATHON OIL CO·Filed 1983·Granted Jan 22, 1985·22 cites·15 claims
- 3566US5682951AFoamed gel completion, workover, and kill fluidMARATHON OIL CO·Filed 1995·Granted Nov 4, 1997·23 cites·27 claims
- 3663US6103772AFoamed gel for permeability reduction or mobility control in a subterranean hydrocarbon-bearing formationMARATHON OIL CO·Filed 1998·Granted Aug 15, 2000·16 cites·18 claims
- 3763US5650379AProcess for reducing permeability in a subterranean hydrocarbon-bearing formation utilizing a gelation solution having a controlled gelation rateMARATHON OIL CO·Filed 1995·Granted Jul 22, 1997·16 cites·7 claims
- 3862US5462390AFoamed gel for blocking fluid flow in soilMARATHON OIL CO·Filed 1995·Granted Oct 31, 1995·19 cites·17 claims
- 3960US5609208ApH dependent process for retarding the gelation rate of a polymer gel utilized to reduce permeability in or near a subterranean hydrocarbon-bearing formationMARATHON OIL CO·Filed 1995·Granted Mar 11, 1997·13 cites·10 claims
- 4060US5431226AProcess for reducing permeability in a high-temperature subterranean hydrocarbon-bearing formation utilizing a decarboxylated crosslinking agentMARATHAN OIL COMPANY·Filed 1994·Granted Jul 11, 1995·18 cites·8 claims
- 4159US5067564ASelective placement of a permeability-reducing material to inhibit fluid communication between a near well bore interval and an underlying aquiferMARATHON OIL CO·Filed 1990·Granted Nov 26, 1991·32 cites·18 claims
- 4258US6025304APermeability or fluid mobility reduction treatment for a hydrocarbon-bearing formation using a dual molecular weight polymer gelMARATHON OIL CO·Filed 1998·Granted Feb 15, 2000·17 cites·24 claims
- 4358US5307878APolymer enhanced foams for reducing gas coningMARATHON OIL CO·Filed 1993·Granted May 3, 1994·15 cites·20 claims
- 4457US5322125AFoamed gels to reduce gas coning in matrix environmentsMARATHON OIL CO·Filed 1993·Granted Jun 21, 1994·13 cites·19 claims
- 4556US4478283AProcess for improving waterflood performance in heterogeneous clay-sensitive formationsMARATHON OIL CO·Filed 1983·Granted Oct 23, 1984·14 cites·12 claims
- 4652US4304301AProcess for improving conformance and flow profiles in a subterranean formationMARATHON OIL CO·Filed 1980·Granted Dec 8, 1981·12 cites·18 claims
- 4751US5346008APolymer enhanced foam for treating gas override or gas channelingMARATHON OIL CO·Filed 1993·Granted Sep 13, 1994·8 cites·17 claims
- 4850US4673040APermeability restoration of damaged formationsMARATHON OIL CO·Filed 1986·Granted Jun 16, 1987·10 cites·22 claims
- 4948US4433729AProcess for selectively reducing the fluid injection rate or production rate of a wellMARATHON OIL CO·Filed 1981·Granted Feb 28, 1984·10 cites·9 claims
- 5044US5476145ASelective placement of a permeability-reducing material in a subterranean interval to inhibit vertical flow through the intervalMARATHON OIL CO·Filed 1994·Granted Dec 19, 1995·20 cites·20 claims
Showing the top 50 of 55 patent records by PatentIndex Score.
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