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| Number | Title | Issue Date |
| 7439209 | Drilling fluid systems with improved fluid loss properties A drilling fluid system comprising a brine and a quantity of cationic copolymers comprising a ratio of acrylamide monomers to cationic derivatives of acrylamide monomers, wherein the quantity and the ratio are effective to maintain effective rheology and fluid loss ... | 10/21/2008 |
| 7316991 | Composition and process for oil extraction The invention relates to a composition for use in the extraction of oil and to a method of extracting oil using the composition. The composition comprises components A, B and C in which: A is a first solid hydrophobic material which is in-soluble in an organic solve... | 01/08/2008 |
| 7306035 | Process for treating a formation A method of introducing an oil field or gas field production chemical into a hydrocarbon-bearing porous subterranean formation penetrated by a wellbore comprising: injecting a gelling composition comprising an aqueous liquid, an oil field or gas field production che... | 12/11/2007 |
| 7299869 | Carbon foam particulates and methods of using carbon foam particulates in subterranean applications The present invention relates to carbon foam particulates and their use in subterranean applications such as production enhancement and completion. One embodiment of the present invention provides a method of treating a subterranean formation using a servicing fluid... | 11/27/2007 |
| 7267291 | Additive for increasing the density of an oil-based fluid and fluid comprising such additive A wellbore fluid having an oleaginous phase and an additive for increasing the density of the wellbore fluid. The additive comprises solid colloidal particles coated with a dispersant during the comminution process of forming the particles. Exemplary starting materi... | 09/11/2007 |
| 7220707 | Sized barite as a weighting agent for drilling fluids An additive that increases the density of fluids containing a sized barite weighting agent. The wellbore fluid has rheological properties comparable to a conventional wellbore fluids but does not exhibit problems with sag and resulting variations in density. An illu... | 05/22/2007 |
| 7176165 | Method of drilling using a sized barite as a weighting agent for drilling fluids An additive that increases the density of fluids containing a sized barite weighting agent. The wellbore fluid has rheological properties comparable to a conventional wellbore fluids but does not exhibit problems with sag and resulting variations in density. An illu... | 02/13/2007 |
| 7169738 | Method of using a sized barite as a weighting agent for drilling fluids An additive that increases the density of fluids containing a sized barite weighting agent. The wellbore fluid has rheological properties comparable to a conventional wellbore fluids but does not exhibit problems with sag and resulting variations in density. An illu... | 01/30/2007 |
| 7168489 | Orthoester compositions and methods for reducing the viscosified treatment fluids In one embodiment, the present invention provides a method of reducing the viscosity of a viscosified treatment fluid comprising contacting the viscosified treatment fluid with an acid generated from an orthoester composition that comprises an orthoester. In another... | 01/30/2007 |
| 7160844 | Proppants and their manufacture Small spheres, commonly referred to as proppants, are manufactured from sol-gel ceramics, preferably aluminosilicates or phosphates, and include chemical composites termed geopolymers. In the preferred manufacturing process, the required chemical components are blen... | 01/09/2007 |
| 7156174 | Contained micro-particles for use in well bore operations The present invention relates to well bore operations, and more particularly, to contained micro-particles, and methods for using such contained micro-particles in cementing operations. An exemplary method of facilitating the use of micro-particles in a well bore fl... | 01/02/2007 |
| 7150322 | Cement compositions comprising environmentally compatible defoamers and methods of use Cement compositions including environmentally compatible defoamers and methods of using such cement compositions are provided herein. An example of a method is a method of cementing in a subterranean formation. Another example of a method is a method of reducing foa... | 12/19/2006 |
| 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 |
| 7140438 | Orthoester compositions and methods of use in subterranean applications The present invention relates to methods and compositions for treating subterranean formations, and more specifically, to improved methods and compositions for generating acids for use downhole, for example, to at least partially degrade the acid-soluble portions of... | 11/28/2006 |
| 7135440 | Method for controlled placement of oilfield chemicals and composition useful for practicing same Disclosed is a method for introducing additives into an oil, gas, or water injection well or pipeline in solid form at a location other than at the bottom. The method is practiced using pellets having a density sufficient to suspend the pellet at a top phase, bottom... | 11/14/2006 |
| 7121339 | Solids-stabilized oil-in-water emulsion and a method for preparing same A solids-stabilized oil-in-water emulsion and a method for preparing the solids-stabilized oil-in-water emulsion. The oil-in-water emulsion is formed by combining oil, water, solid particles and a pH enhancing agent and mixing until the solid-stabilized oil-in-water... | 10/17/2006 |
| 7096947 | Fluid loss control additives for use in fracturing subterranean formations The present invention relates to subterranean fracturing operations, and more particularly to fracturing fluids that includes a fluid loss control additive, and methods of using such fracturing fluids in fracturing subterranean formations. In one embodiment, a fract... | 08/29/2006 |
| 7048053 | Zeolite compositions having enhanced compressive strength Zeolite compositions having enhanced compressive strength and methods therefor are provided. In particular, methods and compositions for wellbore treating fluids, especially settable spotting fluids having enhanced compressive strength are provided. ... | 05/23/2006 |
| 7044220 | Compositions and methods for improving proppant pack permeability and fracture conductivity in a subterranean well The present invention relates to enhancing fluid flow from subterranean formations. More particularly, this invention relates to providing improved proppant matrixes within fractures in a subterranean formation. An example of the methods of increasing the conductivi... | 05/16/2006 |
| 7033975 | Use of surface-modified nanoparticles for oil recovery The present invention provides the use of surface-modified nanoparticles in fluids used to recover hydrocarbon from underground formations. The use of surface-modified nanoparticles in such fluids provides foams that are stable under pressure yet have a shorter foam... | 04/25/2006 |
| 7033977 | Compositions and methods for sealing formations The present invention generally relates to compositions of matter and methods of using those compositions. More particularly, and as part of one of the preferred embodiments, the present invention relates to compositions and methods of use of fluids useful for seali... | 04/25/2006 |
| 7030064 | Bentonite nodules Compressed bentonite-containing nodules are disclosed as are methods for their production and methods for using them to plug wells. ... | 04/18/2006 |
| 6997259 | Methods for forming a permeable and stable mass in a subterranean formation The present invention relates to increasing the permeability of a subterranean formation by forming a resinous mass having conductive channels through which fluids can be produced in the formation. Some embodiments of the present invention provide methods of creatin... | 02/14/2006 |
| 6983797 | Lightweight high strength particles and methods of their use in wells Light weight high strength particles and methods of treating subterranean producing zones utilizing the particles are provided. The light weight high strength particles of the invention are basically comprised of sintered mixtures of a base material and hollow micro... | 01/10/2006 |
| 6939834 | Grout for making watertight screens The invention relates to a grout for making watertight screens which comprises a mixture of water, natural or modified clay, specific blast furnace slag and an activating agent. The invention also relates to a process which makes use of said grout, as well as... | 09/06/2005 |
| 6861394 | Internal breaker A wellbore fluid including a peroxide degradable polymer and an encapsulated peroxide source. The peroxide degradable polymer may be a polysaccharide. The peroxide source may include an inorganic peroxide, including zinc and alkaline earth metal peroxides, such as m... | 03/01/2005 |
| 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 |
| 6790812 | Acid soluble, high fluid loss pill for lost circulation High fluid loss acid soluble lost circulation material and spotting pill comprising the lost circulation material. The spotting pill preferably is weighted to a density substantially the same as the drilling fluid used to treat the formation. ... | 09/14/2004 |
| 6764980 | Coated products and use thereof in oil fields An oil field production chemical, especially a scale inhibitor, is in the form of particles thereof carrying a coating e.g. of a dispersing agent. The coating may be polymeric such as an oligomeric polyacid polyester, a polymeric alkoxylated alcohol or a fatty acid ... | 07/20/2004 |
| 6753299 | Composite silica proppant material An improved lightweight and highly permeable proppant composition for use in increasing the productivity of a gas or oil well. The proppant composition includes equal amounts by weight of uncalcined bauxite, uncalcined shale and quartz, held together with a binder f... | 06/22/2004 |
| 6734144 | Solids-stabilized water-in-oil emulsion and method for using same A method for enhancing the stability of a solids-stabilized water-in-oil emulsion by pretreating the oil prior to emulsification. The pretreatment step can be accomplished by adding dilute acid to the oil, adding a lignosulfonate additive to the oil, sulfonating the... | 05/11/2004 |
| 6586372 | Additive for increasing the density of a fluid and fluid comprising such additive An additive which increases the density of wellbore fluids used during the construction or repair of oil, gas, injection, water or geothermal wells comprises solid colloidal particles of weight average particle diameter (D50) of less than 2 mic... | 07/01/2003 |
| 6579832 | Method for treating drilling fluid using nanoparticles A method for treating a drilling fluid is provided, which method includes the steps of providing a drilling fluid, providing a drilling fluid additive in the form of superparamagnetic nanoparticles, mixing the drilling fluid additive with the drilling flu... | 06/17/2003 |
| 6576597 | Method of increasing the low shear rate viscosity and shear thinning index of divalent cation-containing fluids and the fluids obtained thereby Disclosed is a method of increasing the low shear rate viscosity and the shear thinning index of aqueous fluids containing a divalent cation salt, a crosslinked amylopectin starch which functions as both a viscosifier/suspending agent and as a fluid loss ... | 06/10/2003 |
| 6554070 | Composition and method for sealing an annular space between a well bore and a casing A method for sealing an annular space between a bore hole and a casing includes the steps of: providing a fluid sealing system comprising a particulate material and a bonding agent; positioning the fluid sealing system in the annular space whereby the par... | 04/29/2003 |
| 6548452 | Weight material for drilling fluids and method of creating and maintaining the desired weight Drilling fluid additives are designed to increase the density of drilling fluids while minimizing the increase in the resistance to flow of the drilling fluid. In particular, barite particles are added to the drilling fluid as a weight material where the ... | 04/15/2003 |
| 6478868 | Early-enhanced strength cement compositions and methods The present invention provides improved early-enhanced strength cement compositions and methods. The cement compositions can be utilized in surface construction projects as well as in the construction of oil, gas and water wells. The improved cement compo... | 11/12/2002 |
| 6423802 | Water soluble copolymers and polymer compositions comprising same and use thereof Novel polymer compositions are disclosed, along with their use as well service fluids, for example as completion fluids, work-over fluids or drilling fluids, comprising water soluable copolymers having sulfonate groups and carboxylate groups, along with a... | 07/23/2002 |
| 6403537 | Drilling fluid systems with improved fluid loss properties A drilling fluid system comprising a brine and a quantity of cationic copolymers comprising a ratio of acrylamide monomers to cationic derivatives of acrylamide monomers, wherein the quantity and the ratio are effective to maintain effective rheology and ... | 06/11/2002 |
| 6391830 | Divalent cation-containing well drilling and servicing fluids The invention provides clay-free, preferably biopolymer free, well drilling and servicing fluids comprising an aqueous divalent cation-containig water soluble salt, a bridging agent, and a pre-gelatinized crosslinked amylopectin starch suspending agent an... | 05/21/2002 |
