| Patent Number |
Title Of Patent |
Date Issued |
| 4332688 |
Aqueous acid solution containing an acrylamido alkanesulfonic acid polymer |
June 1, 1982 |
| Significant improvement in the recovery of hydrocarbons from a subterranean hydrocarbon-bearing formation is accomplished by injecting into the formation via an injection well drilled into a formation communicating with an adjacent producing well and containing sandstone and clay com |
| 4277580 |
Terpolymer of N-vinyl pyrrolidone in alkoxylated form |
July 7, 1981 |
| The production of hydrocarbons from a subterranean hydrocarbon-bearing formation containing acid-soluble components, such as one composed at least in part of dolomite or limestone, is stimulated by injecting into the formation usually via casing and cement pack perforations a composi |
| 4219429 |
Composition and process for stimulating well production |
August 26, 1980 |
| The production of hydrocarbons from a subterranean hydrocarbon-bearing formation containing acid-soluble components, such as one composed at least in part of dolomite or limestone, is stimulated by injecting into the formation usually via casing and cement pack perforations a composi |
| 4210205 |
Secondary recovery process |
July 1, 1980 |
| Significant improvement in the recovery of hydrocarbons from a subterranean hydrocarbon-bearing calcareous formation is accomplished by injecting into the formation via an injection well drilled into a formation communicating with an adjacent producing well and containing acid-soluble co |
| 4206058 |
Method for stimulating well production |
June 3, 1980 |
| The production of hydrocarbons from a subterranean hydrocarbon-bearing formation containing acid-soluble components, such as one composed at least in part of dolomite or limestone, is stimulated by injecting into the formation a composition comprising an aqueous solution of a mineral |
| 4200154 |
Composition and method for stimulating well production |
April 29, 1980 |
| The production of hydrocarbons from a subterranean hydrocarbon-bearing formation containing acid-soluble components, such as one containing clays or siliceous minerals as exemplified by sandstone, shale, etc. is stimulated by injecting into the formation a composition comprising an a |
| 4200151 |
Secondary recovery process |
April 29, 1980 |
| Significant improvement in the recovery of hydrocarbons from a subterranean hydrocarbon-bearing calcareous formation is accomplished by injecting into the formation via an injection well drilled into a formation communicating with an adjacent producing well and containing acid-soluble co |
| 4163476 |
Secondary recovery process utilizing an acrylamido alkanesulfonic acid polymer |
August 7, 1979 |
| Significant improvement in the recovery of hydrocarbons from a subterranean hydrocarbon-bearing formation is accomplished by injecting into the formation via an injection well drilled into a formation communicating with an adjacent producing well and containing sandstone and clay com |
| 4094798 |
Oil recovery process usable in high temperature formations containing high salinity water which |
June 13, 1978 |
| A fluid containing a dual surfactant system and a process using the fluid for recovering petroleum from petroleum formations containing high salinity water, e.g. from 50,000 to 225,000 parts per million which may include from about 200 to about 14,000 parts per million polyvalent ions |
| 4079011 |
Composition containing a polyvinylpyrrolidone and method for stimulating well production |
March 14, 1978 |
| The production of hydrocarbons from a subterranean hydrocarbon-bearing formation containing acid-soluble components, such as one containing clays or siliceous minerals as exemplified by sandstone, shale, etc. is stimulated by injecting into the formation a composition comprising an a |
| 4026874 |
Scale control |
May 31, 1977 |
| This invention concerns methods of imparting properties of scale resistance to surfaces upon which adherent scale is normally prone to form during contact with mineralized waters through the use of novel; polyurethane-type resins, characterized by containing pendant polyoxyalkylene c |
| 4008165 |
Surfactant oil recovery process usable in high temperature formations having high concentrations |
February 15, 1977 |
| A three surfactant system usable in high temperature petroleum formations containing water having from about 200 to about 14,000 parts per million polyvalent ions such as calcium and/or magnesium dissolved therein and a pH of from 5 to 9, and a method of using said surfactant system for |
| 3988253 |
Composition and method for treating scale |
October 26, 1976 |
| Composition and method for the treatment of inorganic mineral scale, using a treating composition consisting of a water soluble substituted taurine of prescribed formula in an amount of from 0.0005% to about 0.005%, on a weight basis. |
| 3979315 |
Method for treating scale |
September 7, 1976 |
| Composition and method for the treatment of inorganic mineral scale, particularly calcium and/or barium sulfate scale, using a treating composition consisting of a water-soluble sulfonated ethoxylated alkylphenol of prescribed formula in an amount of from about 0.0005 to about 0.005% |
| 3975282 |
Composition and method for treating scale |
August 17, 1976 |
| Composition and method for the treatment of inorganic mineral scale particularly calcium and/or barium sulfate scale, using a treating composition consisting of a water-soluble sulfonated ethoxylated alcohol of prescribed formula in an amount of from about 0.0005% to about 0.005%, on |
| 3975281 |
Method for treating scale |
August 17, 1976 |
| Composition and method for the treatment of scale, particularly calcium and/or barium sulfate scale, using an alkyl benzene sulfonate, including the alkali metal and ammonium salts thereof, said alkyl group containing from about 8 to about 14 carbon atoms at a concentration of from about |
| 3968840 |
Controlled rate acidization process |
July 13, 1976 |
| A process is provided whereby a subterranean formation may be treated uniformly with acid at a controlled rate to a considerable distance from an injection point. The process includes an introduction of an acid which is solid but will slowly solubilize in water or brine in a subterranean |
| 3962110 |
Process and composition for preventing scale build-up |
June 8, 1976 |
| A process and composition for the treatment of oil and gas wells to prevent and/or inhibit the build-up of an undesirable inorganic mineral scale deposits in which an aqueous solution of a vinylpyrrolidone polymer is employed in an amount sufficient to prevent and/or inhibit the developm |
| 3951793 |
Method for controlling scale |
April 20, 1976 |
| Composition and method for the treatment of scale, particularly calcium and/or barium sulfate scale, using a treating composition consisting of about one part by weight of a sulfated/sulfonated polyethoxy alkyl phenol containing from about 8 to about 14 carbon atoms in the alkyl group an |
| 3946814 |
Method for oil recovery |
March 30, 1976 |
| The production of hydrocarbons from a subterranean hydrocarbon-bearing formation is stimulated by injecting into the formation an aqueous solution of a compound hereinafter described. The elimination of plugging of capillary openings within the formation and mineral scale deposition on |
| 3946813 |
Method for stimulating well production |
March 30, 1976 |
| The production of hydrocarbons from a subterranean hydrocarbon-bearing formation containing acid-soluble components, such as one composed at least in part of dolomite or limestone, is stimulated by injecting into the formation a composition comprising an aqueous solution of a mineral |
| 3945439 |
Method for oil recovery |
March 23, 1976 |
| The production of hydrocarbons from a subterranean hydrocarbon-bearing formation is stimulated by injecting into the formation an aqueous solution of a compound hereinafter described. The elimination of plugging of capillary openings within the formation and mineral scale deposition on |
| 3945438 |
Method for stimulating well production |
March 23, 1976 |
| The production of hydrocarbons from a subterranean hydrocarbon-bearing formation containing acid-soluble components, such as one composed at least in part of dolomite or limestone, is stimulated by injecting into the formation a composition comprising an aqueous solution of a mineral |
| 3939911 |
Surfactant oil recovery process usable in high temperature formations containing water having hi |
February 24, 1976 |
| A three surfactant system usable in high temperature petroleum formations containing water having from about 200 to about 14,000 parts per million polyvalent ions such as calcium and/or magnesium dissolved therein and a pH of from 5 to 9, and a method of using said surfactant system for |
