Patents by Inventor Paul W. Fischer
Paul W. Fischer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4390412Abstract: Fouling of metallic surfaces contacted with petroleum oils at elevated temperatures is reduced by adding to the oil small amounts of an oil-soluble N-alkylamino-alkylbenzene sulfonate, a heterocyclic amine, and phenylhydrazine.Type: GrantFiled: September 29, 1981Date of Patent: June 28, 1983Assignee: Union Oil Company of CaliforniaInventors: Louis M. Dvoracek, Paul W. Fischer, Milan Skripek
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Patent number: 4319063Abstract: Fouling of metallic surfaces contacted with petroleum oils at elevated temperatures is reduced by adding to the oil small amounts of an oil-soluble N-alkylamino-alkylbenzene sulfonate, a heterocyclic amine, and phenylhydrazine.Type: GrantFiled: November 6, 1978Date of Patent: March 9, 1982Assignee: Union Oil Company of CaliforniaInventors: Louis M. Dvoracek, Paul W. Fischer, Milan Skripek
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Patent number: 4201678Abstract: A method for conducting foam drilling and workover operations in a bore hole penetrating a subterranean reservoir, particularly a high-temperature reservoir such as a geothermal reservoir, employing an aqueous foaming solution of about 0.08 to 1.0 percent by weight of an amphoteric betaine, about 0.02 to 0.4 percent by weight of a salt of a linear aliphatic or alkyl aryl hydrocarbon sulfonate, and, optionally, from 0.03 to 3.5 percent by weight unneutralized ammonia.Type: GrantFiled: March 17, 1978Date of Patent: May 6, 1980Assignee: Union Oil Company of CaliforniaInventors: David S. Pye, Paul W. Fischer
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Patent number: 4192753Abstract: A non-damaging variable-density low fluid loss well completion and workover fluid composition which is a dispersion of finely divided slowly oil-soluble, water-insoluble solid particulate matter in a thickened aqueous salt solution. The fluid composition is a mixture of an aqueous solution of a water-soluble inorganic salt, a first high softening point resin fluid loss control additive, a microemulsion fluid loss control additive, and, optionally, a water-dispersible thickening agent and/or a pH control agent. The microemulsion contains water, an oil-soluble surface active agent, a water-dispersible surface active agent, and, as a fluid loss control additive, a mixture of a wax and a second low softening point resin. The microemulsion also optionally contains an additive to prevent phase separation and/or a bactericide. Also disclosed is a method for using this composition in various well drilling, completion and treating operations.Type: GrantFiled: March 7, 1978Date of Patent: March 11, 1980Assignee: Union Oil Company of CaliforniaInventors: David S. Pye, Julius P. Gallus, Paul W. Fischer
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Patent number: 4121664Abstract: A method for conducting foam drilling and workover oprations in a bore hole penetrating a subterranean reservoir employing an aqueous solution of a biodegradable foaming agent composition containing about 0.1 to 1 part by weight of an N-fatty ethyl sulfate salt having the formula: ##STR1## wherein R is a straight chain alkyl radical having from 10 to 16 carbon atoms and M is an alkali metal or ammonium cation, per part per weight of a fatty acid salt having the formula: ##STR2## wherein R.sub.1 is a straight chain alkyl radical having from 9 to 15 carbon atoms and M.sub.1 is an alkali metal or ammonium cation. A particularly preferred foaming agent composition contains sodium 2-(N-lauryl) ethyl sulfate and sodium laurate.Type: GrantFiled: October 17, 1977Date of Patent: October 24, 1978Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, David S. Pye
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Patent number: 4121674Abstract: A method for conducting foam drilling and workover operations in a bore hole penetrating a subterranean reservoir employing an aqueous solution of a biodegradable foaming agent composition containing about 0.3 to 3 parts by weight of an N-fatty ethyl sulfonic acid salt having the formula: ##STR1## per part by weight of an N-fatty propionic acid salt having the formula: ##STR2## wherein R and R.sub.1 are straight chain alkyl radicals having from 10 to 16 carbon atoms, and M and M.sub.1 are alkali metal or ammonium cations. A particularly preferred foaming agent composition contains sodium 2-(N-lauryl) ethyl sulfonic acid and sodium 2-(N-lauryl) propionic acid.Type: GrantFiled: October 17, 1977Date of Patent: October 24, 1978Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, David S. Pye
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Patent number: 4120369Abstract: A method for drilling a well through a subterranean formation containing one or more zones of unconsolidated dolomite, wherein the drilling operation is interrupted periodically to consolidate the newly drilled incompetent dolomite by the injection of a sequence of reactant slugs comprised of (I) an aqueous solution containing an acid, a surface active agent and a precipitating agent for silicates, (II) an aqueous solution containing a water-soluble silicate, and (III) an aqueous solution containing a precipitating agent for silicates.Type: GrantFiled: October 3, 1977Date of Patent: October 17, 1978Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, David S. Pye, Julius P. Gallus
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Patent number: 4092252Abstract: A composition and method for drilling wells through subterranean strata containing high temperature aqueous fluids using a gas-containing aqueous drilling fluid containing an alkaline material to raise the pH of the drilling fluid to provide corrosion protection in the liquid phase and a volatile water-soluble nitrogen-containing compound to provide corrosion protection in the gaseous phase.Type: GrantFiled: May 4, 1976Date of Patent: May 30, 1978Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, David S. Pye
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Patent number: 4088583Abstract: Composition and method for drilling a well into a high temperature subterranean reservoir, such as one containing a geothermal fluid, wherein there is used an aqueous foam drilling fluid containing (1) water, (2) gas, (3) a foaming agent, (4) an erosion and corrosion inhibitor, (5) a water-soluble or water-dispersible carboxyalkyl cellulose ether or polyalkylene oxide polymer which both controls the fluid loss of the foam and toughens it, and, optionally, (6) a bit lubricant and/or (7) an anti-torqueing agent.Type: GrantFiled: December 2, 1976Date of Patent: May 9, 1978Assignee: Union Oil Company of CaliforniaInventors: Delbert E. Pyle, David S. Pye, Paul W. Fischer
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Patent number: 4088190Abstract: A method of conducting an enhanced oil recovery process in a subterranean reservoir wherein, as part of the process, there is injected into the reservoir as a sweep fluid a foam containing carbon dioxide, water and a foaming agent having the formula: ##STR1## wherein R is a straight chain alkyl radical having from 10 to 16 carbon atoms; and M is an alkali metal or ammonium cation, with sodium being preferred. A particularly preferred foaming agent is sodium lauryl sulfoacetate.Type: GrantFiled: February 10, 1977Date of Patent: May 9, 1978Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, LeRoy W. Holm, David S. Pye
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Patent number: 4045360Abstract: A method for inhibiting the deposition of wax onto a solid surface from wax-containing petroleum and other wax-containing oils in contact with such solid surface comprising adding to such oils a synergistic mixture of a copolymer of ethylene and a monoethylenically unsaturated ester and one or more fatty derivatives, such as a high molecular weight alcohol, a natural wax, or a fatty acid.Type: GrantFiled: September 22, 1975Date of Patent: August 30, 1977Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, John W. Scheffel
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Patent number: 4039459Abstract: A composition and method for drilling a well into a subterranean reservoir containing a high temperature aqueous liquid which composition contains as a scale inhibitor (i) a water-soluble substituted iminodi(methylene phosphonic acid) compound having a carbon-to-phosphorus bond or a water-soluble salt thereof, (ii) a dicarboxylic acid, (iii) a lower alkyl ester or hydroxy derivative of a dicarboxylic acid, (iv) hexamethylenetetramine, (v) thiourea, or (vi) the amide reaction product of a polycarboxylic acid and an aliphatic amine, an aliphatic hydroxyl amine, or a heterocyclic nitrogen-containing compound.Type: GrantFiled: June 30, 1976Date of Patent: August 2, 1977Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, Horst E. Zilch
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Patent number: 4036764Abstract: A method of conducting foam drilling and workover operations in a bore hole penetrating a subterranean formation, particularly a high-temperature formation such as a geothermal formation, employing an aqueous solution of a foaming agent having the formula: ##STR1## wherein R is a straight chain alkyl radical having from 10 to 16 carton atoms; and M is an alkali metal or ammoniun cation, with sodium being preferred. A particularly preferred foaming agent is sodium lauryl sulfoacetate.Type: GrantFiled: October 14, 1975Date of Patent: July 19, 1977Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, David S. Pye
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Patent number: 4032460Abstract: A method of inhibiting the formation of scale from aqueous solutions containing scale-forming ions at temperatures of up to 400.degree. F. and above during production and utilization of such aqueous solutions comprising adding to the solutions certain amines, amides, thioamides, carboxylic acids or amide reaction products of carboxylic acids and various amines.Type: GrantFiled: October 28, 1975Date of Patent: June 28, 1977Assignee: Union Oil Company of CaliforniaInventors: Horst E. Zilch, Paul W. Fischer
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Patent number: 4013568Abstract: A composition and method for drilling a well into a subterranean formation containing a geothermal fluid utilizing a gas-containing aqueous drilling fluid containing both lignite and a salt of a high molecular weight acrylic polymer.Type: GrantFiled: December 11, 1975Date of Patent: March 22, 1977Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, Jerry C. Jones, deceased, Delbert E. Pyle, Stephen Pye
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Patent number: 4005753Abstract: A water-insoluble particulate composition having controlled slow oil-solubility at temperatures in excess of 350.degree. F. is disclosed. The composition is comprised of solid particles of a homogeneous mixture of (1) polyethylene, ethylene-vinyl acetate copolymer containing about 15 to 30 weight percent vinyl acetate, or admixtures of these polymers; (2) a polyamide having a melting point of between about 400.degree. F. and 460.degree. F.; and (3) a softening agent such as a long chain aliphatic diamide having a melting point between about 280.degree. F. and 300.degree. F., or a polyterpene resin having a melting point of between 230.degree. F. and 275.degree. F. Also disclosed is a method of using this particulate composition in well drilling and treating operations where formation temperatures of 350.degree. F. or above are encountered.Type: GrantFiled: March 4, 1976Date of Patent: February 1, 1977Assignee: Union Oil Company of CaliforniaInventors: John W. Scheffel, Paul W. Fischer
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Patent number: 3995705Abstract: A method of conducting foam drilling and workover operations in a bore hole penetrating a subterranean formation, particularly a high-temperature formation such as a geothermal formation, employing an aqueous solution of a N-acyl-N-methyltaurate foaming agent having the formula: ##STR1## wherein R is a straight chain alkyl group having from 9 to 15 carbon atoms; and M is an alkali metal or ammonium cation, with sodium being preferred. A particularly preferred foaming agent is sodium N-palmitoyl-N-methyltaurate.Type: GrantFiled: October 24, 1975Date of Patent: December 7, 1976Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, D. Stephen Pye
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Patent number: 3989632Abstract: A method for reducing the loss of fluid through the walls of a well penetrating a permeable subterranean formation during completion, workover and other operations. The method provides for the use of a fluid comprising an aqueous dispersion of finely divided, slowly oil-soluble, water-insoluble solid particles in an aqueous salt solution containing chrome lignite, hydroxyethyl cellulose and xanthan gum. The density of the fluid is controlled by varying the concentration of salt dissolved in the solution. The finely divided solid particles consist of a homogeneous solid solution of (1) wax; (2) an oil-soluble surface active glyceryl or sorbitan partial ester of a saturated higher fatty acid; and (3) a water-dispersible surface active polyethylene glycol monoester of a saturated higher fatty acid. The particles may optionally include an ethylene/vinyl acetate copolymer, and/or a fatty alcohol.Type: GrantFiled: January 9, 1975Date of Patent: November 2, 1976Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, David S. Pye, Julius P. Gallus
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Patent number: 3979304Abstract: Well drilling, completion and workover operations, hydraulic fracturing, acidizing, and other well treating operations are improved by the addition to the drilling or treating fluid of an oil-soluble, water-insoluble low fluid loss agent comprising a particulated, homogeneous solid solution of (1) wax; (2) an oil-soluble polyhydroxy higher fatty acid partial ester surface active agent; and (3) a water-dispersible surface active agent such as polyoxyethylene alkyl phenol, a polyethylene glycol higher fatty acid ester, a polyoxyethylene polyhydroxy higher fatty acid ester, a polyoxyethylene tertiary fatty amine, or a polyoxyethylene fatty amide condensate. The agent can optionally include small amounts of a polymeric material and/or a higher fatty alcohol.Type: GrantFiled: November 20, 1974Date of Patent: September 7, 1976Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, David S. Pye, Julius P. Gallus
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Patent number: 3979305Abstract: An oil-soluble, water-insoluble low fluid loss additive composition comprising a particulated, homogeneous solid solution of (1) wax; (2) an oil-soluble polyhydroxy higher fatty acid partial ester surface active agent; and (3) a water-dispersible surface active agent such as a polyoxyethylene alkyl phenol, a polyethylene glycol higher fatty acid ester, a polyoxyethylene polyhydroxy higher fatty acid ester, a polyoxyethylene tertiary fatty amine, or a polyoxyethylene fatty amide condensate. The composition can optionally include small amounts of a polymeric material and/or a higher fatty alcohol. The low fluid loss additive composition can be employed in well drilling, completion and workover operations, and in hydraulic fracturing, acidizing, and other well treating applications.Type: GrantFiled: December 11, 1974Date of Patent: September 7, 1976Assignee: Union Oil Company of CaliforniaInventors: Paul W. Fischer, David S. Pye, Julius P. Gallus