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| Number | Title | Issue Date |
| 7923413 | Lost circulation material for oilfield use A composition for reducing lost circulation in a well, while drilling the well with a drilling mud, which is composed of a base fluid, a mixture of particles, and a blend of fibers. The composition is used by stopping drilling with the mud, injecting a spacer, injec... | 04/12/2011 |
| 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 |
| 7256159 | Fluid loss reducer for high temperature high pressure water based-mud application The present invention concerns a water-based drilling mud for utilization in the drilling of oil wells comprising an aqueous phase wherein the aqueous phase contains an oil soluble polymer in the form of a gel as a fluid loss reducer. The subject invention further r... | 08/14/2007 |
| 7101829 | Fluid loss reducer for high temperature and high pressure water-based mud application The present invention concerns a water-based drilling mud for utilization in the drilling of oil wells comprising an aqueous phase wherein the aqueous phase contains an oil soluble polymer in the form of a gel as fluid loss reducer. The subject invention further rev... | 09/05/2006 |
| 7081441 | Composition for cleaning and/or treating surfaces A composition for treating and/or cleaning surfaces comprises a nanoparticle component selected from the group consisting of metal oxyhydroxides, modified metal oxyhydroxides and mixtures thereof; a buffer/modifier component; optionally, an adjunct ingredient; and t... | 07/25/2006 |
| 7049272 | Downhole chemical delivery system for oil and gas wells The invention provides a method of treating of a well, a formation, or both, with the solids, liquids, or apparatuses, by 1) encasing said solids, liquids, or apparatuses in a water-soluble shell, 2) conveying said encased solids, liquids, or apparatuses to a predet... | 05/23/2006 |
| 7037881 | Stabilized colloidal and colloidal-like systems The present invention generally relates to improved compositions comprising stabilized colloidal or colloidal-like phases (e.g., emulsions, aphrons) and methods of using those compositions. The compositions generally comprise an aqueous continuous phase, one or more... | 05/02/2006 |
| 6855671 | Water based fluids comprising multivalent salts and low molecular weight, low charge cationic polyacrylamide copolymers A drilling system fluid and method of using same. The drilling system fluid comprises water as a continuous phase, an amount of a multivalent metal, and a quantity of a water soluble polyacrylamide copolymer having a charge density of at least about 1%. In a preferr... | 02/15/2005 |
| 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 |
| 6710019 | Wellbore fluid The present invention relates to a wellbore fluid comprising a particulate material composed of the reaction product of A) one or more water soluble organic compound having possessing a molecular weight of less than 30,000 and possessing at least two hydroxyl groups... | 03/23/2004 |
| 6702044 | Methods of consolidating formations or forming chemical casing or both while drilling Methods of consolidating formations or forming chemical casing or both while drilling are provided. One method of the invention comprises drilling a well bore with a drilling fluid comprised of water, a polymeric cationic catalyst which is adsorbed on wea... | 03/09/2004 |
| 6492305 | Method of controlling loss of a subterranean treatment fluid Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that cross-linked to a Brabender peak viscosity of about 800 to about 1250 Brabender units after about 40 ... | 12/10/2002 |
| 6309455 | Stable suspension of hydrocolloids and superplasticizer The present invention comprises a stable hydrocolloid composition in which preferably welan gum is uniformly dispersed in a superplasticizer solution such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and mixture... | 10/30/2001 |
| 6180571 | Fluid loss control additives and subterranean treatment fluids containing the same Selectively cross-linked starches are disclosed that are useful as fluid loss control additives in subterranean treatment fluids comprising starches that are cross-linked to a Brabender peak viscosity of about 800 to about 1250 Brabender units after about... | 01/30/2001 |
| 6106603 | Stable suspension of hydrocolloids and superplasticizer The present invention comprises a stable hydrocolloid composition in which preferably welan gum is uniformly dispersed in a superplasticizer solution such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and solutio... | 08/22/2000 |
| 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 |
| 5654261 | Permeability modifying composition for use in oil recovery A method and use for a dry composition comprising a mixture of water-soluble polymer and an aluminum citrate preparation is disclosed. The polymer is capable of cross-linking in the presence of water and aluminum ions. Any water-soluble polymer known to t... | 08/05/1997 |
| 5629270 | Thermally stable oil-base drilling fluid Oil-base drilling fluids containing a non-sulfonated polymer and/or a non-organophilic clay maintain desirable rheological properties at elevated temperatures.... | 05/13/1997 |
| 5360787 | Dispersant compositions comprising sulfonated isobutylene maleic anhydride copolymer for subterranean well drilling and completion A dispersant for drilling fluids, spacer fluids, cement slurries, completion fluids and mixtures of drilling fluids and cement slurries used for drilling and cementing subterranean wells.... | 11/01/1994 |
| 5211250 | Method for stabilizing boreholes A method of stabilizing a wellbore being drilled through both shale and sandstone zones. A shale stabilizing agent and finely divided particulate material are combined in a water based drilling fluid to provide the stabilization.... | 05/18/1993 |
| 5026735 | Treatment of hazardous materials with aqueous air foam of polyhydroxy polymer A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/... | 06/25/1991 |
| 4839095 | Stable mud drilling fluid additive, composition and process for making the same A drilling fluid includes a water soluble polymer such as a sulfonated amino-formaldehyde and/or methyl cellulose or polyvinyl alcohol in addition to water, bentonite and a weighting agent such as barite. And, these drilling fluids have improved heat stab... | 06/13/1989 |
| 4796700 | Process for retarding fluid flow A gel-forming composition is provided comprising a first substance selected from the group consisting of a polyvinyl alcohol, a polyvinyl alcohol copolymer, and mixtures thereof, glutaraldehyde, and water, and which does not require a separately provided ... | 01/10/1989 |
| 4618434 | Drilling fluids made from solid, free-flowing, continuously-made, water dispersible PVA-aldehyde reaction product A polyvinyl alcohol-aldehyde reaction product is produced continuously in a rotating contactor by contacting solid particles of polyvinyl alcohol with the aldehyde in an acidic aqueous salt solution. The product can be dried and then sieved to remove over... | 10/21/1986 |
| 4609708 | Method for manufacture of polymeric pyrrolidinium methanesulfonate viscosifiers There are provided polymeric pyrrolidinium methanesulfonate viscosifiers which are useful in chemical waterflooding and in drilling fluids. These compounds may be formed by an unexpected cyclization reaction of quaternary diallyl amino groups on polymeric... | 09/02/1986 |
| 4547297 | High temperature drilling mud stabilizer Aqueous drilling fluids containing a hydroxy containing alumina component such as AlO(OH) and a polyvinyl alcohol (PVA) reaction product such as an aldehyde reacted PVA are stabilized for use at temperatures as high as 350° F. (177° C.) by adding stabil... | 10/15/1985 |
| 4547298 | Drilling mud composition which may be converted to cement upon irradiation This application relates to a composition containing a polymeric material which may be cross-linked in the presence of a monomeric cross-linking agent upon irradiation with a nuclear source. The composition is suitable for use as a well drilling fluid pri... | 10/15/1985 |
| 4503170 | Shear thickening fluid The instant invention is directed to shear thickening fluids to prevent unwanted flow in wells penetrating subterranean formations. The shear thickening fluids comprise (1) a water swellable granular clay present in sufficient quantity so that, upon inter... | 03/05/1985 |
| 4486318 | High temperature stable viscosifier and fluid loss control system The present invention is directed to a high temperature stable composition capable of imparting a combination of pseudoplasticity and fluid loss control properties to aqueous systems. The composition is a combination of: (a) a hydroxy containing aluminum ... | 12/04/1984 |
| 4473480 | High temperature stable fluid loss control system The present invention is directed to a high temperature stable composition capable of imparting fluid loss control properties to aqueous systems. The composition is a combination of: (a) a solid, particulate silicate or alumino-silicate material; (b) a chemica... | 09/25/1984 |
| 4472552 | Continuous process for making solid, free-flowing water dispersible PVA-aldehyde reaction product A polyvinyl alcohol-aldehyde reaction product is produced continuously in a rotating contactor by contacting solid particles of the polyvinyl alcohol with the aldehyde in an acidic aqueous salt solution. The product can be dried and then sieved to remove ... | 09/18/1984 |
| 4447341 | Clay stabilizer composition for aqueous drilling fluids The combination of AlO(OH) and crosslinked polyvinyl alcohol can be added to aqueous drilling fluids and especially clay-based aqueous drilling fluids to prevent formation clays and shales from swelling and dispersing when contacted with aqueous drilling ... | 05/08/1984 |
| 4431550 | Drilling fluid viscosifier An aqueous aluminum hydroxide is produced by reacting an acid and a base reactant, where at least one reactant has aluminum, in the presence of a hydroxy acid or a salt of this hydroxy acid. The resulting product has unwanted tri-hydrate formation inhibit... | 02/14/1984 |
| 4428845 | Viscosifier and fluid loss control system A composition capable of imparting pseudoplasticity and fluid loss control properties to aqueous systems. The composition is formed from a combination of: (a) a hydroxy containing aluminum component and (b) a reaction product of a polyaldehyde and a polyvinyl ... | 01/31/1984 |
| 4424302 | Method of forming polymer particles A process for forming polymeric particles from water-soluble polymers by introducing the polymer into an aqueous salt solution in which the salt is of a composition and present in an amount sufficient to inhibit solubilization of the polymer therein and s... | 01/03/1984 |
| 4419316 | Process of making films, fibers or other shaped articles consisting of, or containing, polyhydroxy polymers A process of preparing film, fibers and other shaped articles by nitrosating a polyhydroxy polymer in a reaction medium containing a solubilizing agent for the resulting polyhydroxy polymer nitrite ester and a suitable proton acceptor, bringing the reacti... | 12/06/1983 |
| 4411800 | High temperature stable fluid loss control system The present invention is directed to a high temperature stable composition capable of imparting a combination of pseudoplasticity and fluid loss control properties to aqueous systems. The composition is a combination of: (a) a solid, particulate silicate ... | 10/25/1983 |
| 4391925 | Shear thickening well control fluid The instant invention is directed to shear thickening fluids which comprise a water swellable clay capable of rapidly forming a paste having a strength of at least 2000 lbs/100 ft2 upon interaction with the aqueous phase employed and present in... | 07/05/1983 |
| 4389319 | High temperature stable viscosifier and fluid loss control system The present invention is directed to a high temperature stable composition capable of imparting a combination of pseudoplasticity and fluid loss control properties to aqueous systems. The composition is a combination of: (a) a hydroxy containing aluminum ... | 06/21/1983 |
| 4385155 | Method of preparing crosslinked poly(vinyl alcohol) Poly(vinyl acetate) latex reacted with an aldehyde at acid pH to prepare crosslinked poly(vinyl alcohol) suitable as water-loss agent in drilling fluids.... | 05/24/1983 |
