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| Number | Title | Issue Date |
| 7341106 | Methods for wellbore strengthening and controlling fluid circulation loss A sealant composition and methods for using the same are disclosed. In an embodiment, a method of servicing a wellbore in contact with a subterranean formation is disclosed. The method comprises placing a sealing agent and a nonaqueous carrier fluid in the wellbore.... | 03/11/2008 |
| 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 |
| 7178610 | Subterranean treatment fluids comprising polyoxazoline compositions and methods of use in subterranean formations The present invention relates to subterranean treatment fluids. In particular, the present invention relates to subterranean treatment fluid compositions that comprise polyoxazoline compositions and methods for using such compositions in subterranean applications. I... | 02/20/2007 |
| 7134496 | Method of removing an invert emulsion filter cake after the drilling process using a single phase microemulsion Single phase microemulsions improve the removal of filter cakes formed during drilling with invert emulsions. The single phase microemulsion removes oil and solids from the deposited filter cake. Optionally, an acid capable of solubilizing the filter cake bridging p... | 11/14/2006 |
| 6422325 | Method for reducing borehole erosion in shale formations A method is disclosed that provides a stable invert emulsion for an oil-based drilling fluid with an environmentally friendly additive that effectively eliminates shale hydration and consequent borehole erosion. The additive is preferably potassium format... | 07/23/2002 |
| 6251288 | Methods of drilling a bore hole and dehydrating drilling fluids A method of drilling a bore hole is described. A desiccant is added to a Hydrocarbon Based Fluid (Crude Oil--Refined Oil--Diesel Fuel--Mineral Oil--etc.) used as a drilling fluid to drill bore holes (Oil and Gas Wells--Mine Shafts--etc.) to react with any... | 06/26/2001 |
| 6148917 | Method of releasing stuck pipe or tools and spotting fluids therefor Aphron-containing spotting fluids and their use in releasing pipe or tools stuck in the filter cake on the sides of a borehole are disclosed. The spotting fluids comprise a liquid, either aqueous, oleaginous, or mixtures thereof, a viscosifier which impar... | 11/21/2000 |
| 5909779 | Oil-based drilling fluids suitable for drilling in the presence of acidic gases An alkaline-reserve-free, oil-based drilling fluid is disclosed as comprising an oleaginous liquid, and an amine surfactant having the structure R-NH2, wherein R represents a C12 -C22 alkyl group or alkenyl group. Such flu... | 06/08/1999 |
| 5846913 | Invert biodegradable n-alkane(s) wellbore fluid containing less than 10 percent by weight of cycloparaffing isoparaffing and aromatic compounds, and method of drilling with such fluid The invention concerns wellbore fluids suitable for use in the oil and gas exploration and production industries and embraces fluids used for drilling, completion, workover or packing of wellbores. The invention is especially concerned with biodegradable ... | 12/08/1998 |
| 5826669 | Drilling fluid loss prevention and lubrication additive A method of preventing or controlling the loss of well drilling fluid into the pores and fractures of subterranean rock formations by the addition of resilient graphitic carbon particles to the drilling fluid in sufficient amounts to plug the pores and fr... | 10/27/1998 |
| 5718841 | Organoclay compositions manufactured with organic acid derived ester quaternary ammonium compounds A novel organophilic clay comprising the reaction product of: (a) a smectite-type clay; and (b) a quaternary ammonium compound or compounds selected from the group consisting of: ##STR1## wherein R1 is an unsaturated alkyl-ester group having 8 ... | 02/17/1998 |
| 5671810 | Composition and method for relief of differential sticking during drilling A composition and method for use in freeing differentially stuck pipes is presented, comprising a hydrocarbon, acetic acid and a surfactant. The composition frees stock pipes quickly, thus reducing down-time during the process of drilling a subterranean w... | 09/30/1997 |
| 5635457 | Non-toxic, inexpensive synthetic drilling fluid A non-toxic, inexpensive synthetic fluid for use in wellbore fluids (e.g., drilling fluids) is selected from the group consisting of (A) fluids having (I) a pour point greater than about -30° C. (-22° F.) and (II) a cetane index greater than 50, and com... | 06/03/1997 |
| 5556832 | Solids-free, essentially all-oil wellbore fluid A solids-free, essentially all-oil wellbore fluid comprises (a) an organic fluid having (i) a melting point less than about 20° C. (about 68° F.), (ii) a flash point greater than about 54.4° C. (about 130° F.), and (iii) a dipole moment greater than 0... | 09/17/1996 |
| 5494120 | Glycoside-in-oil drilling fluid system An invert oil emulsion drilling fluid containing oil, an emulsifier such as a fatty acid soap, clay or polymer, and a glycoside such as glucoside.... | 02/27/1996 |
| 5096883 | Oil-base drilling fluid comprising branched chain paraffins such as the dimer of 1-decene A non-toxic drilling fluid (drilling mud), for use in rotary-type well-drilling operations, comprises a non-toxic base-oil consisting essentially of branched-chain paraffins which may or may not contain ester functionalities, the base-oil having: (i) betw... | 03/17/1992 |
| 5079100 | Wear resistant coatings for engine components and a process for producing such coatings Engine components of steel or superalloy subject to wear from alternating friction at medium temperatures in the region of 700° C. are provided with a protective wear-resistant coating by a) electrophoretic deposition of a metal-ceramic structure comprising a... | 01/07/1992 |
| 5076944 | Seepage loss reducing additive for well working compositions and uses thereof The invention provides well working fluid compositions containing cotton burrs ground to certain particle size ranges to decrease the seepage loss of the fluid to fluid permeable formations contacted by the compositions. Also provided is a seepage loss ad... | 12/31/1991 |
| 5075033 | Processes for preparing organophilic clay gellants An improved organophilic clay gellant which is the reaction product of a smectite-type clay, an organic cation and, optionally, an organic anion. The cation from the smectite-type clay, the anion from the organic cation and, if present, the cation form th... | 12/24/1991 |
| 5071575 | Well working compositions, method of decreasing the seepage loss from such compositions, and additive therefor The invention provides well working fluid compositions containing oat hulls ground to certain particle size ranges to decrease the seepage loss of the fluid to fluid permeable formations contacted by the compositions. Also provided is a seepage loss addit... | 12/10/1991 |
| 4900456 | Well bore fluid A method for the completion or work-over of a well comprises the step of using a solids-free, non-aqueous well-bore fluid comprising a halogenated organic compound as a completion or work-over fluid. The fluid has a specific gravity in the range 0.9 to 2.... | 02/13/1990 |
| 4876030 | Organophilic clay suspension medium A novel organophilic clay suspension medium prepared by admixing an organophilic clay with a hydrocarbon oil and an activator selected from the group consisting of phenyl hydroxyalkyl ethers and phenylalkanols. Optionally water may be added to the admixtu... | 10/24/1989 |
| 4839096 | Low toxicity oil composition and use thereof in drilling fluids This invention relates to a base oil composition suitable for use in drilling fluids, the composition comprising an oil component with an aromatic hydrocarbon content of less than 10% w/w and a polar activator which is an ether alcohol or a mixture of eth... | 06/13/1989 |
| 4740319 | Oil base drilling fluid composition This invention relates to an improved oil-base drilling fluid composition and its use. The improved oil-base drilling fluid composition of this invention is characterized by thixotropic properties which result in a yield point of at least 4.0. The composi... | 04/26/1988 |
| 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 |
| 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 |
| 4631136 | Non-polluting non-toxic drilling fluid compositions and method of preparation The present invention relates to plant or vegetable oil-based drilling fluid compositions which are non-polluting and non-toxic, and which provide improved lubricating properties and stability for use under widely-varying load and pressure drilling condit... | 12/23/1986 |
| 4579669 | High temperature drilling fluids based on sulfonated thermoplastic polymers A new class of viscosification agents based on water insoluble and oil insoluble neutralized sulfonated thermoplastic resins is described for oil-based drilling muds. The resultant muds display good viscosity characteristics and good stability when formul... | 04/01/1986 |
| 4537688 | Low and high temperature drilling fluids based on sulfonated terpolymer ionomers The present invention relates to sulfonated thermoplastic terpolymers which are terpolymers of t-butyl styrene, styrene and sodium styrene sulfonate wherein these sulfonated terpolymers function as viscosification agents when added to oil-based drilling m... | 08/27/1985 |
| 4525285 | Method of preventing loss of an oil-base drilling fluid during the drilling of an oil or gas well into a subterranean formation A method of drilling a well bore into a subterranean formation containing water with monovalent and polyvalent cations and preventing leak-off into the formation of an oil-base drilling fluid used in the drilling. The method is carried out by adding to an... | 06/25/1985 |
| 4501672 | Organic compounds A fluid loss reducing additive for an oil-based well working fluid is the product of mixing together, in an oil or oil-based fluid, lignite or humic acid with an aliphatic amide or hydroxyamide, or a cyclic derivative thereof, containing no primary or sec... | 02/26/1985 |
| 4498995 | Lost circulation drilling fluid A drilling mud, or other drilling fluid containing particulate expanded aggregates is effective to seal the fractures and openings and prevent lost circulation of the mud or fluid in a well. The expanded aggregates used are inorganic clays, shales and sla... | 02/12/1985 |
| 4481121 | Viscosifier for oil base drilling fluids A viscosifier for an oil base drilling fluid of the type used in well drilling and workover procedures is shown which comprises an effective amount of a montan wax dispersed within the fluid to provide the needed viscosity and gel strength to properly sus... | 11/06/1984 |
| 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 |
| 4425455 | Drilling fluids based on powdered sulfonated thermoplastic polymers The present invention relates to powdered sulfonated thermoplastic polymers which function as viscosification agents when added to oil-based drilling muds which are the fluids used to maintain pressure, cool drill bits and lift cuttings from the holes in ... | 01/10/1984 |
| 4425462 | Drilling fluids based on sulfonated elastomeric polymers The present invention relates to sulfonated elastomeric polymers which are copolymers of isoprene and sodium styrene sulfonate or teropolymers of isoprene, styrene and sodium styrene sulfonate wherein these sulfonated polymers function as viscosification ... | 01/10/1984 |
| 4425463 | Drilling fluids based on a mixture of sulfonated thermoplastic polymer and an amine-treated clay The present invention relates to mixtures of sulfonated thermoplastic polymers and amine-treated clays which function as viscosification agents when added to oil-based drilling muds which are the fluids used to maintain pressure, cool drill bits and lift ... | 01/10/1984 |
| 4036764 | Method of foam drilling using a sulfoacetate foaming agent A method of conducting foam drilling and workover operations in a bore hole penetrating a subterranean formation, particularly a high-temperature formation such as a geothermal formation, employing an aqueous solution of a foaming agent having the formula... | 07/19/1977 |
| 4013568 | Composition and method for drilling formations containing geothermal fluid A composition and method for drilling a well into a subterranean formation containing a geothermal fluid utilizing a gas-containing aqueous drilling fluid containing both lignite and a salt of a high molecular weight acrylic polymer.... | 03/22/1977 |
