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| Number | Title | Issue Date |
| 8022018 | Quaternized dithiazines and method of using same in treatment of wells Corrosion of metallic tubulars in an oil, gas or geothermal well may be inhibited by introducing into the well a dithiazine or dithiazine of the formula: wherein R is selected from the group consisting of a C1 to... | 09/20/2011 |
| 8022017 | Method of using dithiazine to inhibit corrosion Corrosion of metallic tubulars in an oil, gas or geothermal well may be inhibited by introducing into the well a dithiazine of the formula: wherein R is selected from the group consisting of a C1 to C10 | 09/20/2011 |
| 7429620 | Surfactant package for well treatment and method using same A surfactant blend for servicing wells includes a first non-ionic surfactant having a hydrophilic-lipophilic balance of between about 10 and about 15; a second non-ionic surfactant having a hydrophilic-lipophilic balance of between about 2 and about 6; and an anioni... | 09/30/2008 |
| 7407916 | Foamed treatment fluids and associated methods Foamed treatment fluids comprising water, a gas, and a foaming and foam stabilizing surfactant mixture comprising an alkali salt of an alkyl ether sulfate, wherein the alkali salt of the alkyl ether sulfate comprises an alkali salt of a C6-10 alkyl ether ... | 08/05/2008 |
| 7326670 | Well service fluid and method of making and using the same A well service fluid comprising one or more anionic viscoelastic surfactants and one or more polymers is described. The fluids can contain an aqueous or non-aqueous fluid and/or a buffer for adjusting the pH of the fracturing fluid. The well service fluid can be use... | 02/05/2008 |
| 7264052 | Methods and compositions for consolidating proppant in fractures Improved methods and compositions for consolidating proppant in subterranean fractures are provided. In certain embodiments, the hardenable resin compositions may be especially suited for consolidating proppant in subterranean fractures having temperatures above abo... | 09/04/2007 |
| 6858566 | Methods of generating gas in and foaming well cement compositions The present invention relates to methods of generating gas in and forming cement compositions that may be introduced into a subterranean zone. A method of the present invention provides a method of generating gas in a cement composition that comprises providing the ... | 02/22/2005 |
| 6762155 | Methods of removing water-based drilling fluids and compositions The present invention provides methods and compositions for removing a water-based drilling fluid from surfaces in a well bore and leaving the surfaces water-wet. A method of the invention basically comprises the following steps. A water-based drilling fluid removal... | 07/13/2004 |
| 6554069 | Methods of removing water-based drilling fluids and compositions The present invention provides methods and compositions for removing a water-based drilling fluid from surfaces in a well bore and leaving the surfaces water-wet. A method of the invention basically comprises the following steps. A water-based drilling fl... | 04/29/2003 |
| 6225263 | Use of oil and gas field chemicals A method of recovering or increasing the recovery of oil and/or gas from an underground formation involving injecting into the formation, preferably in the form of an aqueous solution, at least one mono alkyl ether of polyethylene glycol in which the alky... | 05/01/2001 |
| 5707940 | Environmentally friendly water based drilling fluids An oil-in-water emulsion composition is disclosed which comprises a mixture of brine and; (A) at least one natural oil or synthetic triglyceride of the formula ##STR1## wherein R1, R2 and R3 are independently saturated or ... | 01/13/1998 |
| 5591701 | Iterated foam process and composition for well treatment In the removal of particulates from a wellbore, such as in air drilling for hydrocarbon recovery, a mixture of an amphoteric foaming agent and, typically, an anionic surfactant is employed. An aqueous solution thereof having a pH of at least 9.5 is used t... | 01/07/1997 |
| 5441928 | Aqueous gellable composition containing an anti-syneresis agent An aqueous gellable composition capable of producing gels resistant to syneresis in the presence of divalent ions, contains: a water-soluble acrylamide polymer or copolymer, a crosslinking agent formed by a water-soluble aldehyde, or a water-soluble aldehyde a... | 08/15/1995 |
| 5366643 | Method and composition for acidizing subterranean formations The invention relates to a method and composition for acidizing a subterranean formation employing an acidic solution comprising hydrochloric acid solution containing a corrosion inhibitor present in a corrosion-reducing effective amount. The corrosion in... | 11/22/1994 |
| 5268112 | Gel-forming composition Gels containing gas precursors and/or pathways are used to selectively reduce the flow of aqueous fluids with respect to the flow of nonaqueous fluids to enhance the recovery of the nonaqueous fluids from subterranean formations. The gels, while stable at... | 12/07/1993 |
| 5112505 | Certain dithiocarbamates and method of use for reducing asphaltene precipitation in asphaltenic reservoirs Reduction of asphaltene precipitation in asphaltenic subterranean reservoirs treated with aqueous solutions of strong acid is achieved by utilizing novel dithiocarbamate compositions to sequester iron.... | 05/12/1992 |
| 5089227 | Methods for treating hydrocarbon recovery operations and industrial waters Certain dithiocarbamates are used as reverse demulsifiers, corrosion and scale inhibitors, flocculants, biocides, flotation aids, water clarifiers, interface control agents and antifoaming agents.... | 02/18/1992 |
| 4784778 | Corrosion inhibiting composition for zinc halide-based clear, high density fluids Thio group corrosion inhibitors and aldose group antioxidants when combined provide a synergistic corrosion inhibition system for clear, high density oil and gas completion and workover fluids.... | 11/15/1988 |
| 4740320 | Process for preventing corrosion of a metal in contact with a well fluid Novel compositions are prepared by reacting hydrocarbyl substituted nitrogen-containing aromatic heterocyclic compounds such as 2,5-dimethylpyridine or 2,4,6-collidine, an aldehyde such as formaldehyde, or a ketone such as acetone, or mixtures thereof and... | 04/26/1988 |
| 4605068 | Well treating composition and method There is disclosed a method of treating a subterranean substantially carbonate-free sandstone formation associated with a well completed in said substantially carbonate-free sandstone formation comprising displacing into said formation through said well a... | 08/12/1986 |
| 4495200 | Process for the control of sulfate-reducing bacteria A process for the control of planktonic sulfate-reducing bacteria in industrial process water systems which comprises the step of treating said system with a dithiocarbamate of the formula: ##STR1## wherein R is a C1 to C4 alkyl... | 01/22/1985 |
| 4491525 | Oil recovery with surfactant flooding A surfactant system useful for oil recovery comprises a surfactant, such as a petroleum sulfonate, and a nitrile cosurfactant, such as acrylonitrile.... | 01/01/1985 |
| 4247405 | Viscosity-stabilized aqueous solutions Thiourea functions as a solution viscosity stabilizer in aqueous compositions comprising thiourea, nonionic polymers such as polyalkylene oxides and anionic surfactants such as petroleum sulfonates. The aqueous compositions are useful in connection with f... | 01/27/1981 |
| 4124073 | Method of using viscosity-stabilized aqueous solutions Thiourea functions as a solution viscosity stabilizer in aqueous compositions comprising thiourea, nonionic polymers such as polyalkylene oxides and anionic surfactants such as petroleum sulfonates. The aqueous compositions are useful in connection with f... | 11/07/1978 |
| 4032460 | Inhibition of scale deposition in high temperature wells A method of inhibiting the formation of scale from aqueous solutions containing scale-forming ions at temperatures of up to 400° F. and above during production and utilization of such aqueous solutions comprising adding to the solutions certain amines, a... | 06/28/1977 |
