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| Number | Title | Issue Date |
| 7939469 | Use of CMC in drilling fluids The invention relates to a water-based drilling fluid composition comprising a carboxymethyl cellulose (CMC), wherein the CMC is characterized by forming a gel at 25° C. after high-shear dissolution in a 0.3 wt % aqueous sodium chloride solution, the final content ... | 05/10/2011 |
| 7393407 | Silicon oxide slurry and method for producing such slurry The present invention relates to a slurry containing water, amorphous silica panicles having a particle size less than 1 micron and silica flour with a particle size between 2-200 microns. In order to stablize the slurry, the slurry contains a polysaccharide. The in... | 07/01/2008 |
| 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 |
| 7332458 | Drilling fluid A drilling fluid for use in high oil viscosity formations containing tar, sand and oil entrained therein. The drilling fluid can be comprised of a polymer in an amount from between 0.05% and 5% by volume, a solvent in an amount from between 1% and 20% by volume and ... | 02/19/2008 |
| 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 |
| 7300965 | Mixed polymer network A mixed polymer network made from reacting a carboxyalkyl cellulose and a synthetic water-soluble polymer with a crosslinking agent. ... | 11/27/2007 |
| 7211550 | Compositions for controlling scaling and completion fluids An aqueous-based composition containing cesium formate and at least one chelating agent is described. Methods of removing scaling deposits, which may include alkaline earth metal sulfates, present on surfaces, including porous media, such as alkaline earth metal sul... | 05/01/2007 |
| 7204312 | Compositions and methods for the delivery of chemical components in subterranean well bores The present invention relates to the delivery of a plurality of chemical components in well bore applications. More particularly, this invention relates to delivery capsules and methods of using such delivery capsules for facilitating the delivery of at least a plur... | 04/17/2007 |
| 7199083 | Self-generating foamed drilling fluids Self-generating foamed fluids for circulation through a well during drilling operations and methods for circulating such self-generating foamed drilling fluids are provided for. The drilling fluid comprises an aqueous solvent, a polymer, a surfactant, a first foam g... | 04/03/2007 |
| 7165617 | Viscosified treatment fluids and associated methods of use In one embodiment, provided is a method of fracturing a portion of a subterranean formation that comprises providing a viscosified treatment fluid comprising a single salt aqueous fluid having a density of greater than 9 pounds per gallon and a crosslinked viscosify... | 01/23/2007 |
| 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 |
| 7066996 | Joint compounds using thickeners prepared from raw cotton linters A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a ready mixed joint compound composition wherein the amount of the cellulose ether in the joint compound composition is significantly reduced. When this join... | 06/27/2006 |
| 7050166 | Calcium carbonate imaging technique The invention concerns a method for determining the particle size distribution (PSD) of bridging agents in fluids, particularly aqueous fluids used in hydrocarbon recovery such as drilling fluids, drill-in fluids, completion fluids, and the like. It was discovered t... | 05/23/2006 |
| 7018955 | Drilling fluid, apparatus, and method Disclosed are drilling fluids that include carboxyalkylated corn hulls in an amount effective to inhibit fluid loss from a wellbore formation. The carboxyalkylated corn hulls are heat stable and surprisingly effective at inhibiting fluid loss. Also disclosed are a d... | 03/28/2006 |
| 6997270 | Compounds and method for generating a highly efficient membrane in water-based drilling fluids A method is disclosed that affords improved stability to wellbores during drilling in argillaceous formations with water-based drilling fluids. The method comprises adding to the drilling fluid a compound of the invention having the capacity in water to generate a h... | 02/14/2006 |
| 6997261 | Conformance improvement additive, conformance treatment fluid made therefrom, method of improving conformance in a subterranean formation For conformance treatment to plug an opening in subterranean hydrocarbon bearing formation, a conformance additive including water soluble crosslinkable polymer, a crosslinking agent, a filter aid that is preferably diatomaceous earth, and optionally a reinforcing m... | 02/14/2006 |
| 6994173 | Method of drilling a borehole A method for drilling a borehole employing a drilling fluid including an additive comprising a glucose derivative with pH lowering acid, buffers and surface active agents. The drilling fluid additive preferably exhibits the following properties: activity of approxim... | 02/07/2006 |
| 6983799 | Method of using a swelling agent to prevent a cement slurry from being lost to a subterranean formation Methods of cementing in a subterranean formation include passing a swelling agent to a permeable zone in a subterranean formation. The swelling agent is combined with a carrier fluid before being passed to the permeable zone. Upon contacting an aqueous fluid, the sw... | 01/10/2006 |
| 6939833 | Additive for, treatment fluid for, and method of plugging a tubing/casing annulus in a well bore For tubing/casing annulus plug treatment to plug a well, a tubing/casing annulus plug additive including a dry mixture of water soluble crosslinkable polymer, a crosslinking agent, a filter aid, and an optional reinforcing material, preferably of fibers and/or commi... | 09/06/2005 |
| 6932158 | Well plug additive, well plug treatment fluid made therefrom, and method of plugging a well For well plug treatment to plug an abandoned well, a well plug additive including a dry mixture of water soluble crosslinkable polymer, a crosslinking agent, and filter aid, and optionally, a reinforcing material preferably of fibers and/or comminuted plant material... | 08/23/2005 |
| 6927194 | Well kill additive, well kill treatment fluid made therefrom, and method of killing a well For well kill treatment to prevent the intrusion of formation fluids into the wellbore while the well is open, a well kill additive including a dry mixture of water soluble crosslinkable polymer, a crosslinking agent, filter aid, and optionally, a reinforcing materi... | 08/09/2005 |
| 6921742 | Well drilling fluids Clay is stabilized in the drilling of wells and other formation treatment for hydrocarbon production by the addition to the drilling or other fluid fluid of potassium formate together with a cationic formation control additive. ... | 07/26/2005 |
| 6852675 | Nutrient source for marine organisms from drilling fluids additives A nutrient source for marine organisms comprising: drilling fluids containing organic contaminants; a solidification agent; a cell transport agent; and a cellulosic additive. ... | 02/08/2005 |
| 6825152 | Method for creating dense drilling fluid additive and composition therefor A dense drilling fluid additive used to control lost circulation, fluid loss and/or seepage loss of drilling fluid during drilling operations is disclosed. Such additive is formed from ground base materials, such as inorganic matter, and may be used to manage the rh... | 11/30/2004 |
| 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 |
| 6809067 | Composition for oil and gas drilling fluids with solidification agent, cell transport agent and cellulosic additive A composition for oil and gas drilling fluids containing organic contaminants comprising: a solidification agent; cell transport agent; a cellulosic additive; and wherein said composition comprises enough solidification agent to enable the solidification agent to el... | 10/26/2004 |
| 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 |
| 6797675 | Composition for oil and gas drilling fluids with solidification agent and cellulose additive A composition and method for treating oil and gas drilling fluids containing organic contaminants comprising: a solidification agent and a cellulosic additive; and wherein the composition comprises enough solidification agent to enable the solidification agent to el... | 09/28/2004 |
| 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 |
| 6774089 | Water-based drilling fluid additive containing talc and cellulose A drilling fluid additive is provided wherein the additive is manufactured by a method comprised of admixing colloidal solids such as talc with a combination of oil and glycol or cellulose to create a suspended mixture to thereby allow the colloidal solids to be pre... | 08/10/2004 |
| 6770601 | Aphron-containing aqueous well drilling and servicing fluids The invention provides a method and fluid for drilling or servicing a well in a subterranean formation containing lost circulation zones or depleted, low pressure reservoirs. The fluid comprises an aqueous liquid having dispersed therein a viscosifier which increase... | 08/03/2004 |
| 6737384 | Drilling fluid additive system containing talc and cellulose A drilling fluid additive system is provided wherein the system is manufactured by a method comprised of admixing colloidal solids such as talc with a carrier such as oils and glycols or talc with cellulose to create a suspended mixture to thereby allow the colloida... | 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 |
| 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 |
| 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 |
| 6247543 | Shale hydration inhibition agent and method of use A water-base drilling fluid for use in drilling wells through a formation containing a shale which swells in the presence of water. The drilling fluid preferably includes: an aqueous based continuous phase, a weight material, and a shale hydration inhibit... | 06/19/2001 |
| 6221152 | Stable suspension of hydrocolloids The present invention comprises a stable hydrocolloid welan gum in which a hydrocolloid, preferably welan gum, is uniformly dispersed in a superplasticizer such as sulfonated naphthalene, sulfonated melamine, modified lignosulfate, their derivatives and m... | 04/24/2001 |
