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| Number | Title | Issue Date |
| 7320951 | Silica-based drilling mud comprising glycoside lubricants with amino-linked alkyl chains The drilling mud with a lowered coefficient of friction having a silicate-based mud and a lubricant selected from the group consisting of: glycosides, alkylpolyalkoxyalcohols, alcohol ester polymers, amine phosphates, starch and combinations thereof. ... | 01/22/2008 |
| 7304019 | Concentrated suspensions Suspensions are provided of water-soluble materials in non-aqueous carrier fluids using suspension agents that include organophilic clays. Methods of forming such suspensions are provided. Methods are also provided for using such suspensions to prepare aqueous solut... | 12/04/2007 |
| 7147067 | Zeolite-containing drilling fluids Methods and compositions for wellbore treating fluids, especially drilling fluids, that comprise zeolite and a carrier fluid. ... | 12/12/2006 |
| 7063176 | Membrane forming in-situ polymerization for water based drilling fluid A method of increasing shale formation stability with a water based drilling fluid, the method including: delivering to the shale formation a drilling fluid formulated to include an aqueous fluid; a first reactant which is a soluble monomer, oligomer, or polymer wit... | 06/20/2006 |
| 6884760 | Water based wellbore fluids The invention relates to water based wellbore fluids used during a hydrocarbon recovery process, such as drilling, fracturing, gravel packing and wellbore workover. According to the present invention, said wellbore fluid comprises a fluid loss additive and a bridgin... | 04/26/2005 |
| 6818597 | Suspensions of water soluble polymers in surfactant free non-aqueous solvents Liquid water soluble polymer suspensions in non-aqueous solvents are extremely stable over long periods of time with minimum separation of the solvent and no hard packing of the dispersed water soluble polymer. The suspensions enable a user to rapidly add the suspen... | 11/16/2004 |
| 6800593 | Hydrophilic polymer concentrates Disclosed is a hydrophilic, water soluble polymer concentrate for addition to aqueous liquids to enhance the properties thereof, particularly to increase the viscosity or decrease the fluid loss of well drilling and servicing fluids, the concentrate comprising a hyd... | 10/05/2004 |
| 6794340 | Method for removing drill cuttings from wellbores and drilling fluids A method is disclosed for drilling a wellbore employing a drilling fluid providing the advantages of easy pumpability of a low viscosity fluid with the drill cuttings suspension capability of a highly viscous fluid. The viscosity of the fluid is also easily and quic... | 09/21/2004 |
| 6784140 | Thermally stable, substantially water-free well fluid A method of treating a well including injecting a thermally stable, substantially water-free well-treating fluid into the well, wherein the well-treating fluid comprises a polymer, a glycol compound, and a salt is disclosed. In another embodiment, a thermally stable... | 08/31/2004 |
| 6737385 | Well drilling and servicing fluids and methods of removing filter cake deposited thereby Well drilling and servicing fluids for use in producing formations and methods of removing filter cake therefrom are provided. The methods basically comprise using a drilling or servicing fluid comprised of water, a density increasing water soluble salt, a fluid los... | 05/18/2004 |
| 6620769 | Environmentally acceptable fluid polymer suspension for oil field services This invention provides a water-free oil based fluid polymer suspension composition for use as a rheology modifier and fluid loss reducer in oil or gas well servicing fluids. It has been found that by using white medicinal oil as a carrier, high solids co... | 09/16/2003 |
| 6586587 | Ligand-modified cellulose products The invention relates to a ligand-modified cellulose product comprising cellulose ether, calcium salt and at least one ligand as a chelating agent. The product can be used e.g. in drilling fluids.... | 07/01/2003 |
| 6454005 | Treating shale and clay in hydrocarbon producing formations with combinations of guar and potassium formate Clay is stabilized in the drilling of wells for hydrocarbon production by the addition to the drilling fluid of potassium formate together with an amount of guar effective to inhibit clay and shale swelling and sloughing.... | 09/24/2002 |
| 6451743 | Stable liquid suspension compositions and method of making and use thereof A new stable liquid suspension containing non-soluble particles dispersed in a non-aqueous liquid medium having a concentration of a suspension aid and a method of making and use thereof.... | 09/17/2002 |
| 6281172 | Quaternary nitrogen containing amphoteric water soluble polymers and their use in drilling fluids Water based drilling fluid compositions which contain at least one viscosity builder and at least one rheological control agent wherein the rheological control agent is an amphoteric polymer, the cationic groups of the amphoteric polymer being quaternary ... | 08/28/2001 |
| 6054416 | Drilling fluids comprising biodegradable heteropolyglycols A fluid selected form the group consisting of a drilling, a drill-in, and a completion fluid, said fluid comprising a substantially linear heteropolyglycol in an amount effective to perform a function selected from the group consisting of polymer stabiliz... | 04/25/2000 |
| 5981447 | Method and composition for controlling fluid loss in high permeability hydrocarbon bearing formations A chemical system and method to stop or minimize fluid loss during completion of wells penetrating hydrocarbon formations are provided. The inventions relates to formulating a highly stable crosslinked hydroxyethyl cellulose (HEC), control released viscos... | 11/09/1999 |
| 5849674 | Compositions and processes for oil field applications A composition and a process for treating a subterranean formation are disclosed. The process comprises injecting into the subterranean formation a composition which comprises a polymer, a crosslinking agent, a liquid, optionally a clay, and further option... | 12/15/1998 |
| 5808052 | Use of cellulose mixed ethers as additives for earth pressure shields The present invention relates to water-soluble, particularly ternary, preferably ionic, cellulose mixed ethers, more particularly to anionic water-soluble cellulose mixed ethers, as additives for drilling fluid applications.... | 09/15/1998 |
| 5785747 | Viscosification of high density brines The present invention provides compositions useful for viscosifying aqueous fluids, methods for making them and methods for using them. In one aspect of the invention, inventive compositions comprise a prehydrating alcohol having at least two hydroxyl gro... | 07/28/1998 |
| 5710108 | Biopolymer/oil suspension compositions utilized in aqueous-based fluids used in the oil service industry including completion and drilling fluids The invention involves biopolymer/oil suspension compositions for the oil service industry, most particularly drilling and completion fluids, which provide such fluids a variety of desirable properties. Biopolymers include water soluble polymers and water... | 01/20/1998 |
| 5602082 | Efficiency of ethoxylated/propoxylated polyols with other additives to remove water from shale Drilling fluid for improving the osmotic efficiency of a shale during the drilling of a well, the drilling fluid containing ethoxylated/propoxylated polyol and at least one other additive such as glucoside, glycerol, glycol, or polyglycerol.... | 02/11/1997 |
| 5576271 | Composition and process for stabilizing viscosity or controlling water loss of polymer-containing water based fluids A composition useful for viscosifying a water-based fluid is provided which comprises a polymer such as guar gum, a metal compound such as an aluminum compound. The composition can also contain a polymer such as guar gum, a magnesium compound such as magn... | 11/19/1996 |
| 5362713 | Drilling mud compositions The addition of relatively small quantities of reticulated bacterial cellulose to well bore drilling muds improves their rheological properties. A preferred reticulated bacterial cellulose is one produced under agitated culture conditions using strains of... | 11/08/1994 |
| 5256651 | Hydrophilic-hydrophobic derivatives of polygalactomannans containing tertiary amine functionality Triple derivatives of polygalactomannan i.e., dialkylaminoalkyl ether-hydroxyalkyl ether - long aliphatic chain ether of polygalactomannan, are useful as thickening agents for aqueous fluids.... | 10/26/1993 |
| 4964999 | Process for forming stable emulsions of water soluble polysaccharides in hydrocarbon liquids Stable emulsion are made from hydrocarbon liquids, water and a water-soluble polysaccharide, plus a fatty acid alkanol amide surfactant. These emulsions are readily dispersed in water to form viscous solutions useful in the clarification of waste waters, ... | 10/23/1990 |
| 4647385 | Reduction of viscosity of aqueous fluids The viscosity of thickened aqueous solutions of water-soluble polymers is reduced by the addition of alkali metal and alkaline earth metal salts of hypochlorous acid and tertiary amines. The combination of the salt and the tertiary amine is much more effi... | 03/03/1987 |
| 4565647 | Foaming surfactant compositions Foaming compositions containing an alkylpolysaccharide surfactant and a sulfate, sulfonate and/or carboxylate cosurfactant and processes for utilizing foams containing these compositions.... | 01/21/1986 |
| 4469620 | Dry blend thickening composition containing benzoquinone and polygalactomannan gum This invention provides a particulate dry blend thickening agent consisting of polygalactomannan gum (e.g., guar gum), benzoquinone, and a basic reagent (e.g., sodium carbonate). This invention further provides a process for preparing a viscoelastic aqueo... | 09/04/1984 |
| 4439328 | Well servicing fluid additive Disclosed is a fluid, pourable well servicing fluid additive comprising a water-soluble polymer, an alkaline earth metal base, and a fibrous material suspended in an oleaginous liquid with a gellant and, optionally, a dispersant therefor. The additive is ... | 03/27/1984 |
| 4378049 | Methods, additives and compositions for temporarily sealing high temperature permeable formations Methods, additives and compositions for selectively temporarily sealing high temperature permeable formations penetrated by well bores. The compositions are formed by dispersing a granular additive into an aqueous medium which contains a galactomannan gum... | 03/29/1983 |
| 4290899 | Thermal stabilizer for non-clay wellbore fluids Calcined dolomite stabilizes aqueous solutions of viscosifiers, such as polysaccharides, exposed to temperatures as high as 200° F. (93° C.) for prolonged periods.... | 09/22/1981 |
| 4257903 | Drilling fluid containing crosslinked polysaccharide derivative A drilling fluid having extremely desirable physical properties which comprises an aqueous solution of a hydroxyalkyl polysaccharide derivative and a water soluble ionic aluminum crosslinking agent, preferably sodium aluminate.... | 03/24/1981 |
| 4175042 | Well completion and work over fluid and method of use A nondamaging work over and completion fluid having water soluble bridging agents includes a saturated brine solution having at least one water soluble salt which is insoluble in the saturated brine solution and having particle size range of about 5 micro... | 11/20/1979 |
| 4140639 | Clay-free wellbore fluid A clay-free, i.e., non-argillaceous brine wellbore fluid having unstructured viscosity and improved water loss properties from an additive composition present in an amount of 0.1 to 3 weight % based on wellbore fluid and consisting essentially of 15 to 95... | 02/20/1979 |
| 4038206 | Hydroxyalkyl locust bean/xanthomonas hydrophilic colloid blends A blend of xanthomonas gum and water soluble hydroxyalkyl ether of locust bean gum which has unique thickening properties. The blend is particularly useful in drilling oil wells and in oil well fracturing fluids.... | 07/26/1977 |
| 4025443 | Clay-free wellbore fluid A clay-free, i.e., non-argillaceous wellbore fluid, having unstructured viscosity is obtained by combining water with an additive composition comprising hydroxy alkyl guar gum and at least 10 weight percent of magnesia or magnesium hydroxide based on the ... | 05/24/1977 |
