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| Number | Title | Issue Date |
| 7732380 | Drilling fluids containing biodegradable organophilic clay Drilling fluids are provided that comprise an organophilic clay treated with a quaternary ammonium surfactant having an amide linkage. The quaternary ammonium surfactant may comprise a compound generally represented by the following formula: | 06/08/2010 |
| 7521399 | Drilling fluids containing biodegradable organophilic clay Drilling fluids are provided that comprise an organophilic clay treated with a quaternary ammonium surfactant having an amide linkage. The quaternary ammonium surfactant may comprise a compound generally represented by the following formula: | 04/21/2009 |
| 7398826 | Well treatment with dissolvable polymer Well treatment is disclosed that includes injecting a well treatment fluid with insoluble polyol polymer such as polyvinyl alcohol (PVOH) dispersed therein, depositing the insoluble polymer in the wellbore or an adjacent formation, and thereafter dissolving the poly... | 07/15/2008 |
| 7348297 | Topical defoamer and demulsifier Compounds of the formula H(CH2)zCOO—[C2H4O]xCyH2y+1 where z is 0-2, x is an integer from 1 to 5 and y is an integer from 4-9 are used as emulsion breakers and defoamers in formation treat... | 03/25/2008 |
| 7060661 | Acid thickeners and uses thereof The present invention generally relates to aqueous, acidic compositions thickened with an amidoamine oxide gelling agent and/or viscoelastic surfactant of the general formula I: wherein R1 is a saturat... | 06/13/2006 |
| 7052901 | Bacteria-based and enzyme-based mechanisms and products for viscosity reduction breaking of viscoelastic fluids It has been discovered that fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of a biochemical agent, such as bacteria, fungi, and/or enzymes. The biochemical agent may directly ... | 05/30/2006 |
| 6806234 | Topical defoamer and demulsifier Compounds of the formula H(CH2)zCOO—[C2H4O]xCyH2y+1 where z is 0-2, x is an integer from 1 to 5 and y is an integer from 4-9 are used as emulsion breakers and defoamers in formation treat... | 10/19/2004 |
| 6506710 | Viscoelastic surfactants and compositions containing same A method for controlling the rheology of aqueous systems, particularly for those intended for underground use, includes injecting an aqueous viscoelastic fluid containing a surfactant gelling agent into the system. The viscoelastic surfactant composition ... | 01/14/2003 |
| 6239183 | Method for controlling the rheology of an aqueous fluid and gelling agent therefor A method for controlling the rheology of aqueous systems, particularly for those intended for underground use, includes injecting an aqueous fluid containing a surfactant gelling agent into the system. The surfactant gelling agents are, for example, fatty... | 05/29/2001 |
| 5858928 | Gel of an apolar medium, its use for the preparation of water-based drilling fluids The invention relates to a gel made of apolar medium including: an apolar medium, a "multichain" liquid surface-active agent in acidic form, soluble or dispersible in the said apolar medium, an agent for neutralizing the said "multichain" surface-active agent, from... | 01/12/1999 |
| 5807810 | Functional fluids and liquid cleaning compositions and suspending media Aqueous structured surfactants, e.g., lamellar, or preferably spherulitic systems optionally containing suspended solids are used as functional fluids, such as drilling fluids, cutting fluids, hydraulic fluids, heat transfer fluids, construction muds and ... | 09/15/1998 |
| 5256331 | Water-in-oil emulsions containing hydroxylamine Water-in-oil emulsions are disclosed wherein the continuous phase comprises an oil and an emulsifier and the discontinuous phase comprises an aqueous solution of a hydroxylamine or an at least partially neutralized hydroxylamine salt.... | 10/26/1993 |
| 5090990 | Industrial antimicrobial:uses for 2-(2-bromo-2-nitroethenyl)-furan 2-(2-bromo-2-nitroethenyl)-furan can be used as an antimicrobial in broad spectrum of uses. A novel process for preparing 2-(2-bromo-2-nitroethenyl)-furan has been found in which furfural is reacted with bromonitromethane using a primary amine or primary ... | 02/25/1992 |
| 4997580 | Use of organic fluorochemical compounds with oleophobic and hydrophobic groups in crude oils as antideposition agents, and compositions thereof A method of inhibiting the deposition of paraffin wax, asphaltene, or mixtures thereof in a crude oil contaminated with paraffin wax, asphaltene, or mixtures thereof and susceptible to such depositions comprising the step of incorporating into said crude ... | 03/05/1991 |
| 4664820 | Preactivated organophilic clay gellant lubricating grease thickened with preactivated organophilic clay gellant and process for preparing preactivated organophilic clay gellants A preactivated organophilic clay gellant that may be used to thicken organic compositions, especially, lubricating greases without the presence of a polar activator. The preactivated organophilic clay gellant may be prepared using certain process paramete... | 05/12/1987 |
| 4515699 | Chemically cleaning drilling/completion/packer brines A process for removing contaminating solids from high density, salt type aqueous drilling/completion/packer fluid prior to its introduction into a well bore. A small effective (e.g., 0.5% volume) of an aliphatic alcohol, 2-ethyl hexanol, and a surface act... | 05/07/1985 |
| 4456537 | Chemically cleaning drilling/completion/packer brines A process for removing contaminating solids from high density, salt type aqueous drilling/completion/packer fluid prior to its introduction into a well bore. A small effective amount (e.g., 0.5% volume) of an aliphatic alcohol (e.g., n-hexanol) and a surf... | 06/26/1984 |
| 4425243 | Foaming agents for use in drilling for oil and gas Foaming agents for use in oil and gas production comprising n-octyl dimethylamine oxide, n-decyl dimethylamine oxide, branched decyl dimethylamine oxide, and mixtures thereof, all of which generate copious quantities of stable foam even in the presence of... | 01/10/1984 |
