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| Number | Title | Issue Date |
| 7576039 | Additive for drilling fluids Subject matter of the present invention is a drilling fluid additive based on sulfonated asphalt, which comprises a water soluble and anionic polymer component in quantities of 0.1 to 20 wt. %, with respect to the total additive in addition to the asphalt component.... | 08/18/2009 |
| 7311158 | Silicate-containing additives for well bore treatments and associated methods The present invention relates to methods and compositions for use in subterranean operations. More particularly, the present invention relates to additives comprising one or more silicates used to treat tar resident in a well bore, and methods of use. In one embodim... | 12/25/2007 |
| 7271134 | Water-based polymers for use as friction reducers in aqueous treatment fluids Disclosed are methods comprising providing an aqueous polymer dispersion comprising water, an anionic salt, a water-based friction reducing polymer, a polyol, an anionic surfactant, and a nonionic surfactant; mixing the aqueous polymer dispersion with additional wat... | 09/18/2007 |
| 7094737 | Sugar cane additive for filtration control in well working compositions An additive for controlling filtration loss from a well working fluid in contact with a permeable formation, which comprises sugar cane ash, or sugar cane ash and a cellulose-like material, or sugar cane ash, a cellulose-like material and an oleaginous liquid, where... | 08/22/2006 |
| 7001871 | Water-based drilling fluid additive containing talc and graphite A drilling fluid additive is provided wherein the additive is manufactured by a method comprised of admixing at least one carrier such as a polypropylene glycol to talc and subsequently admixing graphite to the talc and carrier mixture; and then admixing an uintaite... | 02/21/2006 |
| 6968898 | System and method for removing particles from a well bore penetrating a possible producing formation A system and method for removing particles from a well bore penetrating a possible hydrocarbon producing formation, according to which drilling fluid is mixed with a weighted material, and the mixture is introduced into a well bore so that the mixture scours any par... | 11/29/2005 |
| 6861392 | Compositions for restoring lost circulation A method and composition is provided for sealing a subterranean zone penetrated by a well bore to restore lost circulation. In one embodiment, the composition comprises a pellet comprising a mixture of lost circulation materials (LCMs). ... | 03/01/2005 |
| 6806232 | Composition of drilling fluids comprising ground elastomeric crumb rubber material and a method of decreasing seepage and whole mud loss using such composition Well-working fluid compositions containing certain processed inorganic, oil and water wettable ground elastomeric crumb rubber materials to decrease the seepage loss of various fluids to subterranean formations in which these well working fluids are required and uti... | 10/19/2004 |
| 6616743 | Aqueous emulsions, with bentonite for cold application bitumen Compositions of an aqueous emulsion of a bitumen and a drilling mud bentonite are especially adapted for cold application and provide many advantages.... | 09/09/2003 |
| 6514916 | Process for making sulfonated uintaite and well fluid additives including sulfonated uintaite Sulfonated uintaite is prepared by sulfonating a naturally occurring uintaite charge with a sulfonating agent such as sulfur trioxide, fuming sulfuric acid, chlorosulfonic acid, oleum, or concentrated sulfuric acid to produce sulfonic acids of uintaite. T... | 02/04/2003 |
| 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 |
| 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 |
| 5502030 | Liquid additive comprising a sulfonated asphalt and processes therefor and therewith A process for preparing a fluid additive comprises (1) mixing a viscosifier such as a water-soluble polymer with water to form a viscosified water; (2) contacting a glycol-based polymer with the viscosified water followed by mixing to prepare a glycol-vis... | 03/26/1996 |
| 5180020 | Method for inhibiting the initiation and propagation of formation fractures while drilling Fracture initiation and propagation during drilling are prevented or inhibited by including an effective amount of a specially sized solid particulate loss prevention material in the drilling fluid prior to encountering formation breakdown in a susceptibl... | 01/19/1993 |
| 5120708 | Non-poluting anti-stick water-base drilling fluid modifier and method of use A water-based drilling fluid additive composition comprising a water soluble polyoxyalkylene compound selected from polyoxyalkylene glycols, monoalkylethers of polyoxyalkylene glycols, and mixtures thereof, which have a cloud point in the range from about... | 06/09/1992 |
| 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 |
| 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 |
| 5032296 | Well treating fluids and additives therefor An additive for reducing the water loss and improving other properties of well treating fluids in high temperature subterranean environments and well treating fluids including the additive are provided. The additive comprises a mixture of a water soluble ... | 07/16/1991 |
| 5030365 | Water-wettable drilling mud additives containing uintaite A water-based drilling mud additive comprising a pre-blended combination of about 2 parts of high softening point uintaite, about 1 part of a lower softening point uintaite, about 1 part of causticized lignite, and a strongly lipophilic, non-ionic surfact... | 07/09/1991 |
| 4743383 | Drilling fluid additives for use in hard brine environments A drilling fluid additive is disclosed which will prevent water loss into subterranean formations during the drilling of oil and gas wells in hard brine environments. The drilling fluid additive comprises a hydrocarbon, an anionic surfactant, an alcohol, ... | 05/10/1988 |
| 4671883 | Fluid loss control additives for oil-based well-working fluids Fluid loss control additives for oil-based well-working fluids comprise a solubilized lignite derivative and an oil-swellable or oil-soluble polymer. The solubilized lignite derivative may be oil-solubilized (e.g. a lignite/amine complex) or water-solubil... | 06/09/1987 |
| 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 |
| 4514308 | Sulfonated asphalt Sulfonated asphalt/hydrogenated conjugated diene-monovinyl aromatic copolymer compositions, preparations thereof, and use in well working fluid compositions.... | 04/30/1985 |
| 4502963 | Use of certain materials as thinners in oil based drilling fluids An additive for use with a water-in-oil emulsion type fluid to reduce the viscosity of the fluid to a desired range comprising a fatty acid polyester containing at least 300 carbon atoms.... | 03/05/1985 |
| 4474666 | Balanced-activity improved inverse emulsion to inhibit brittle lutite hydration in oil fields An improved inverse emulsion for use as a drilling fluid that inhibits brittle lutite hydration. The emulsion includes a heavy oil; brine; a viscosity agent with thermostabilizing properties; an emulsifying agent; a thickening agent; a gelatinizing additi... | 10/02/1984 |
| 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 |
| 4385999 | Sulfonated gilsonite drilling mud additive A sulfonated gilsonite used in a drilling mud for drilling a well wherein the sulfonated gilsonite is prepared by reacting at a temperature between 210°-280° F. with a mixture of water, gilsonite having a softening point of at least 300° F., lignite, s... | 05/31/1983 |
| 4356096 | Method of enhancing the effect of liquid organic lubricants in drilling fluids Provided is a method of reducing the torque required to rotate the drill string in a rotary well drilling process which comprises adding to the drilling fluid which is being circulated in the wellbore a liquid organic lubricant and a hydrophobic, organoph... | 10/26/1982 |
| 4233162 | Oil well fluids and dispersants The invention of this application is a dispersant system with various embodiments and subcombinations with exceptional dispersions including colloidal suspensions, aqueous hydrocarbon emulsions and emulsions with solid particulate additives dispersed ther... | 11/11/1980 |
| 4002204 | Timing the deposition of an asphalt plugging material from an asphalt-cationic emulsion In plugging a relatively low temperature subterranean earth formation by injecting a cationic emulsion that contains an asphalt and a pH-increasing reactant that subsequently breaks the emulsion, the timing of the emulsion breaking is improved by using a ... | 01/11/1977 |
| 3968043 | Method of preparation of material for lubrication of external surface of drilling pipe A method of preparation of a lubricant for lubricating the external surface of a drilling pipe comprising the steps of preparing a mixture consisting essentially of gear-box oil, petroleum paraffins, bitumen and tall oil pitch; primary heating of said mix... | 07/06/1976 |
