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| Number | Title | Issue Date |
| 7384892 | Water-based drilling fluids A water-based drilling fluid composition includes water and at least one rheology modifier and/or fluid loss control agent, and at least one other ingredient of polymeric additive, inorganic salts, dispersants, shale stabilizers, weighting agents, or finely divided ... | 06/10/2008 |
| 7350576 | Methods of sealing subterranean formations using rapid setting plugging compositions Methods for using rapid setting plugging compositions comprising oil, clay, magnesium chloride, and magnesium oxide powder to seal permeable zones in subterranean formations are provided. The permeable zones may be sealed by passing the plugging composition and wate... | 04/01/2008 |
| 7351680 | High performance water-based mud system A drilling fluid or mud additive having several components, including leonardite (humic acid); potassium acetate; partially hydrolyzed polyacrylamide (PHPA); polyanionic cellulose polymer (PAC); sulfonated asphalt; sulfoalkylated tannin; polystyrene maleic anhydride... | 04/01/2008 |
| 7316991 | Composition and process for oil extraction The invention relates to a composition for use in the extraction of oil and to a method of extracting oil using the composition. The composition comprises components A, B and C in which: A is a first solid hydrophobic material which is in-soluble in an organic solve... | 01/08/2008 |
| 7226895 | Drilling fluid systems for reducing circulation losses A circulation loss combination for water-based drilling fluid system(s) comprising: a first amount of alkali metal silicate; a second amount of water insoluble particulate; and, a quantity of water soluble activating agent effective to reduce the pH of the water-bas... | 06/05/2007 |
| 7198805 | Method for producing humic acid salts Humic acid salts are produced, with a high output of useful products, by a liquid-phase oxidation of the mixture of an alkaline agent with a lignin-containing plant raw material having the total content of dry substances of 12–20 %, said oxidation being carried ou... | 04/03/2007 |
| 7087555 | Drilling fluids comprising sized graphite particles Drilling fluid systems, graphite particle mixtures, and methods for use thereof including: (a) drilling fluid systems having effective rheology and lubricity properties comprising a suspension of graphite particles having a particle size distribution sufficient to p... | 08/08/2006 |
| 7067004 | Grout compositions having high thermal conductivities and methods of using the same Grout slurries are provided that have high thermal conductivities of greater than about 1.4 Btu/hr-ft-° F. and low hydraulic conductivities ranging from about 5×10−9 cm/s to about 1×10−8 cm/s. Such grout slurries comprise water and a grout composition that is... | 06/27/2006 |
| 6818596 | Dry mix for water based drilling fluid A drilling fluid or mud having several components, including leonardite (humic acid); potassium acetate; partially hydrolyzed polyacrylamide (PHPA); polyanionic cellulose polymer (PAC); sulfonated asphalt; sulfoalkylated tannin; polystyrene maleic anhydride copolyme... | 11/16/2004 |
| 6395686 | High pressure, high temperature (HPHT) fluid loss control aid for drilling fluids The invention relates to a composition comprising an HPHT fluid loss control aid, stable at elevated temperatures and which also acts as an excellent shale stabilizer, bore hold lubricant, sealant for depleted sand, and wall cake conditioner. The HPHT flu... | 05/28/2002 |
| 6258756 | Salt water drilling mud and method A salt water drilling mud comprising a mixture salt water, a solid phase such as pre-hydrated bentonite, attapulgite, sepiolite, and extended bentonite, among others and optionally a synthetic oil, which is mixed with at least one of five different module... | 07/10/2001 |
| 5942467 | Drilling fluid system containing a combination of hydrophilic carbon black/asphaltite and a refined fish oil/glycol mixture and related methods A drilling fluid system that combines a carbon black/asphaltite/lignite mixture with a fish oil/glycol mixture; and a method for manufacturing a drilling fluid system that could be utilized with pre-existing water based muds during drilling and excavating... | 08/24/1999 |
| 5843872 | Drilling fluid system and related methods A drilling fluid system that combines a carbon black/asphaltite/lignite mixture with a fish oil/glycol mixture; and a method for manufacturing a drilling fluid system that could be utilized with pre-existing water based muds during drilling and excavating... | 12/01/1998 |
| 5755295 | Modular drilling fluid system and method A modular drilling mud system is described in terms of five different modules. A first module contains caustic, a natural wax and a natural thinner. A second module contains components of the first module and an alkali metal aluminate prepared by reacting... | 05/26/1998 |
| 5656070 | Corrosion inhibiting compositions containing plant derived catechol complexes Corrosion inhibiting composition include the use of certain plant derived catechol complexes in aqueous based compositions, such as process water, and other aqueous and non-aqueous solvent based coating compositions. The compositions have corrosion inhibi... | 08/12/1997 |
| 5149370 | Well cement compositions having improved properties and methods Cement compositions which have improved properties such as increased stability, reduced settling tendencies, enhanced fluid loss properties and the like and methods of using such cement compositions are provided. The cement compositions are comprised of w... | 09/22/1992 |
| 5114597 | Method of making a drilling fluid containing carbon black in a dispersed state A process for the manufacture of a water based drilling fluid additive comprising the steps of: (a) mixing hydrophobic carbon black and either a surfactant or a dispersant and (b) shearing the mixture of step (a) under a sufficiently high mechanical shear... | 05/19/1992 |
| 5114598 | Method of making drilling fluid containing asphaltite in a dispersed state A process for the manufacture of a water based drilling fluid additive comprising the steps of: (a) premixing hydrophobic asphaltite and either a surfactant or a dispersant and (b) shearing the mixture of step (a) under a sufficiently high mechanical shea... | 05/19/1992 |
| 4938803 | Vinyl grafted lignite fluid loss additives A vinyl grafted lignite fluid loss additive comprising a lignite grafted with at least one vinyl monomer selected from the group consisting of: dimethylaminopropyl methacrylamide, methacrylamido propyltrimethyl ammonium chloride, N-vinylformamide, N-vinyl... | 07/03/1990 |
| 4737295 | Organophilic polyphenolic acid adducts Organophilic polyphenolic materials which are effective fluid loss control additives for oil base well-working fluids are prepared from a polyphenolic material and one or more phosphatides. Preferred phosphatides are phosphoglycerides obtained from vegeta... | 04/12/1988 |
| 4687828 | Water soluble graft copolymers of lignin-(2-propenamide)-(sodium 2,2-dimethyl-3-imino-4-oxohex-5-ene-1-sulfonate), methods of making the same and uses therefor A water-soluble graft copolymer of lignin-(2-propenamide)-(sodium 2,2-dimethyl-3-imino-4-oxohex-5-ene-1-sulfonate) having a central lignin network and at least one grafted side chain, R, having randomly repeating units of the formula: ##STR1## s... | 08/18/1987 |
| 4678591 | Terpolymer composition for aqueous drilling fluids A method of improving high temperature fluid loss and rheology stabilization of high calcium brine clay-containing oil well drilling fluids which comprises adding thereto a stabilizing amount of a water-soluble terpolymer composition comprising: said comp... | 07/07/1987 |
| 4652606 | Water-based drilling fluids having enhanced fluid loss control A water based drilling fluid and process for using the same comprising a mixture of water and a polymer complex, wherein the polymer complex is the reaction product of a dispersant selected from the group consisting of lignite, sulfonated lignite, lignosu... | 03/24/1987 |
| 4645609 | Sulfonated asphalt/causticized lignite blend A well-working fluid such as a drilling mud containing a mixture of sulfonated asphalt and a causticized lignite. The use of the mixture gives a less expensive composition than would be the case with pure sulfonated asphalt and at the same time results in... | 02/24/1987 |
| 4637883 | Fluid loss additives for oil base muds and low fluid loss compositions thereof A novel ammonium salt of quebracho prepared by reacting quebracho with alkyl quaternary ammonium salts is an effective fluid loss control agent when used in oil base drilling fluids for use in drilling oil and gas wells, especially in water in oil emulsio... | 01/20/1987 |
| 4579927 | Copolymers of flavanoid tannins and acrylic monomers This invention relates to a polymer and methods for its preparation. The water soluble polymer is especially useful in that it exhibits superior thermal stability characteristics when used as an additive in aqueous drilling fluids. The polymer consists of... | 04/01/1986 |
| 4569799 | Process for making organophilic humate derivatives The invention provides a novel process of preparing organophilic humate derivatives wherein: an aqueous solution of a humic acid-containing material is prepared with an alkali metal or ammonium base; an amine containing at least 16 carbon atoms and at lea... | 02/11/1986 |
| 4500436 | Saltwater and hard water bentonite mud A seawater/saltwater or hard water bentonite mud for use in drilling, and process for preparing same, comprising sequentially adding to seawater, to saltwater of a chloride concentration up to saturation, or hard water: (1) a caustic agent; (2) a filtrati... | 02/19/1985 |
| 4428843 | Well working compositions, method of decreasing the seepage loss from such compositions, and additive therefor The invention provides well-working fluid compositions containing certain hydrophobic organophilic water wettable fibrous materials to decrease the seepage loss of the fluid to subterranean formations in which the fluid is being used. Also disclosed is a ... | 01/31/1984 |
| 4420405 | Water based drilling mud additive A water based fluid additive useful in drilling mud used during drilling of an oil or gas well is disclosed, produced by reacting water at temperatures between 210°-280° F. with a mixture comprising in percent by weight: and then removing substantially ... | 12/13/1983 |
| 4404108 | Additive for drilling fluids A water-based gas or oil well drilling fluid comprising an aqueous clay dispersion containing as a thinner and water loss control agent, the essentially water-soluble product obtained by heating together quebracho, lignite, gilsonite and sulfonating, meth... | 09/13/1983 |
| 4181533 | Well cementing in permafrost A process for cementing a string of pipe in the permafrost region of a borehole of a well wherein aqueous drilling fluid actually used in drilling the wellbore in the permafrost region of a wellbore is employed. The drilling fluid contains or is adjusted ... | 01/01/1980 |
| 3997452 | Crystal modified deposition of hydrated metal oxide A treating liquid for depositing a coating of hydrated metal oxide on a remotely located material (such as a subterranean sand mass to be consolidated) is improved by a crystal modifier. The improved treating liquid comprises an aqueous alkaline solution ... | 12/14/1976 |
| 3962099 | Water base drilling mud composition An improved water base drilling mud composition wherein calcium ions are controlled and converted to water-insoluble plant nutrient compounds by the use of monocalcium phosphate compounds, said composition comprising an aqueous suspension containing from ... | 06/08/1976 |
| 3956142 | Noncorroding water base drilling fluids and additive system for making Water base drilling fluids having superior stability characteristics and having an improved noncorroding nature utilize an additive system comprising an alkali metal lignin, lignite, quebracho, and a water soluble chromium (VI) salt capable of introducing... | 05/11/1976 |
