Did You Know...
...that on Dec. 15, 1836, the Patent Office was completely destroyed by fire? Lost were some 7,000 models, 9,000 drawings, and 230 books plus all records of patent applications and grants.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7393813 | Water-based drilling fluids using latex additives A water-based drilling fluid having a polymer latex capable of providing a deformable latex film on at least a portion of a subterranean formation has been discovered to provide reduced drilling fluid pressure invasion when used to drill in shale formations for hydr... | 07/01/2008 |
| 7392846 | Silicate-containing additives for well bore treatments and associated methods Methods and compositions for use in subterranean operations, and more particularly, additives comprising one or more silicates used to treat tar resident in a well bore, and methods of use, are provided. In one embodiment, the method comprises a method of treating t... | 07/01/2008 |
| 7387985 | Monovalent cation-containing well fluids A monovalent cation containing well fluid composed of an aqueous brine containing at least 0.6 equivalents per liter of a water soluble monovalent cation salt, is substantially free of divalent cations, and an amount of a starch derivative selected such that the wel... | 06/17/2008 |
| 7343978 | Scale dissolver fluid A scale dissolver fluid for dissolving scale in a subterranean hydrocarbon-bearing formation comprises an effective amount of a scale dissolver formulation and an effective amount of a surfactant for controlling the viscosity of the fluid. In use, formation hydrocar... | 03/18/2008 |
| 7297664 | Cement-free zeolite and fly ash settable fluids and methods therefor Zeolite and Class F fly ash compositions are provided for use as cement-free settable fluids such as settable spotting fluids and cementitious compositions. ... | 11/20/2007 |
| 7268100 | Shale inhibition additive for oil/gas down hole fluids and methods for making and using same An under-balanced drilling fluid additive is disclosed which reduces reactive shale and/or clay swelling during under-balanced drilling operations, where the additive includes an effective amount of a choline salt. A method for under-balanced drilling is also disclo... | 09/11/2007 |
| 7265079 | Self-destructing filter cake A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a mixture of particulate solid acid-precursors, such as a polylactic aci... | 09/04/2007 |
| 7223719 | Breaker composition and process A process for reducing the viscosity of fracturing fluids in downhole oilfield operations is provided. The process comprises contacting a sulfamate stabilized, bromine-based breaker with an aqueous polysaccharide fracturing fluid, with the breaker present in an amou... | 05/29/2007 |
| 7156177 | Scale dissolver fluid A scale dissolver fluid for dissolving scale in a subterranean hydrocarbon-bearing formation comprises an effective amount of a scale dissolver formulation and an effective amount of a surfactant for controlling the viscosity of the fluid. In use, formation hydrocar... | 01/02/2007 |
| 7144844 | Method of using viscoelastic vesicular fluids to enhance productivity of formations A process for enhancing the productivity of a formation consists of introducing into the formation a viscoelastic fluid which contains at least one surfactant, at least one quaternary amine polyelectrolyte, water, and a non-aqueous solvent. The surfactant forms aggr... | 12/05/2006 |
| 7131495 | Method for preparing a chlorine dioxide block-removing agent in oil wells A method to synthesize a chlorine dioxide block remover in a well is described. The method includes dissolving a chlorate aqueous solution and some acidic substances in water and to produce a hydrogen ion. The chlorate aqueous solution and acidic substances are quic... | 11/07/2006 |
| 7090015 | Methods of treating subterranean zones and viscous aqueous fluids containing xanthan and a combination cross-linker—breaker Methods of treating subterranean zones and viscous aqueous fluids containing xanthan biopolymer gelling agent and a combination crosslinker and delayed breaker are provided. A viscous cross-linked aqueous treating fluid of the invention comprises water, a xanthan po... | 08/15/2006 |
| 7028771 | Hydrocarbon recovery Low concentrations, 1–10% of potassium salt, especially potassium formate, are used in a drilling fluid in oil production. Preferably they are used with guar derivatives, most preferably carboxymethyl hydroxypropyl guar. The concentration of potassium formate is m... | 04/18/2006 |
| 7022652 | Compositions and methods for treating subterranean formations A solution containing a compound having the general formula XF.nH2O2, wherein X is K+, Na+ or NH4+ and n is an integer from 1 to 3 (e.g., a peroxysolvate of potassium fluoride compound such as potassi... | 04/04/2006 |
| 6987083 | Xanthan gels in brines and methods of using such xanthan gels in subterranean formations Xanthan gels hydratable in brine, methods of making these xanthan gels, and methods of using these compositions in subterranean formation applications, such as gravel packing, are provided herein. ... | 01/17/2006 |
| 6924254 | Viscous well treating fluids and methods Viscous well treating fluids and methods of treating subterranean zones penetrated by well bores are provided. The viscous fluids are basically comprised of water, a gelling agent and a delayed viscosity breaker comprising pentanedione peroxide. ... | 08/02/2005 |
| 6894008 | Method of increasing pH of high-density brines It has been discovered that carbonate powders and bicarbonate powders are useful to increase the pH and corrosion resistance of high-density brines, such as zinc bromide brines, without significantly reducing their densities. The carbonates and/or bicarbonates shoul... | 05/17/2005 |
| 6838418 | Fracturing fluid There is described a fracturing fluid comprising a polar base, 0.1-5.0% of a mid-molecular weight polyacrylate, and an activator for ionizing the polyacrylate to a hydroscopic state. ... | 01/04/2005 |
| 6818599 | Method for in situ forming of unstable oil in water emulsion, especially as well servicing fluid A method for in situ forming of an unstable oil in water emulsion includes the steps of providing a mixture of an aqueous alkali salt solution and a surfactant, and pumping the mixture down a well containing a crude hydrocarbon having an API gravity of less than or ... | 11/16/2004 |
| 6762154 | Viscoelastic surfactant fluids stable at high brine concentrations Present invention relates to high brine carrier fluid, said carrier fluid selected from the group consisting of organic acids, organic acid salts, inorganic salts and combination of one or more organic acids or organic acid salts, a co-surfactant and an amount of a ... | 07/13/2004 |
| 6746992 | High density thermally stable well fluids High density, thermally stable, brine-based well fluids and methods of using the same are disclosed. In one embodiment a well fluid including water and a salt, the salt including at least one formate salt, wherein the weight-to-volume ratio of the well fluid is with... | 06/08/2004 |
| 6720291 | Well treatment composition for use in iron-rich environments Improved mud additive compositions are provided which are especially formulated to control hole enlargement due to salt bed erosion during drilling, and to assist in solubilization of deposited salt during well operations. The compositions include a first ingredient... | 04/13/2004 |
| 6720292 | Controlling fluid flow in a subterranean formation with a reinforced clay gel A method is provided for blocking high permeability regions in subterranean geological formations, using a reinforced swelling clay gel. A reinforced clay slurry is prepared by mixing swelling clay, such as bentonite, an aqueous solution containing the salt of certa... | 04/13/2004 |
| 6488091 | Subterranean formation treating fluid concentrates, treating fluids and methods Subterranean formation treating fluid concentrates, treating fluids and methods are provided by the present invention. The treating fluid concentrates are basically comprised of water and a substantially fully hydrated depolymerized polymer. The treating ... | 12/03/2002 |
| 6390197 | Method of cementing a well in geological zones containing swelling clays or mud residues containing clays Methods of treating wells for cementing operations and for improving placement of cement in wells containing water swelling clays include treatment of the well with a fluid containing clay precipitating agents capable of coagulating clays in the well. The... | 05/21/2002 |
| 6232274 | Viscoelastic surfactant based gelling composition for wellbore service fluids A wellbore service fluid comprising viscoelastic surfactants in combination with means for controlling the concentration of at least partially charged sites within the fluid is described.... | 05/15/2001 |
| 6225262 | Encapsulated breaker slurry compositions and methods of use An encapsulated breaker slurry composition for reducing the viscosity of a fracturing fluid. The slurry has a flashpoint above 93° C., and the liquid of the slurry does not facilitate release of the breaker from the coating. Methods of using the slurry c... | 05/01/2001 |
| 6177385 | Metal ion crosslinked fracturing fluid and method A fracturing fluid and method is disclosed comprising an aqueous metal hydrated galactomannan gum, buffered to a pH of from about 9 to about 11, and using reduced amounts galactomannan gum. Further, the invention provides a metal ion source, such as borat... | 01/23/2001 |
| 6162766 | Encapsulated breakers, compositions and methods of use An encapsulated breaker is enclosed within a hydrolytically degradable polymer coating. Compositions containing this encapsulated breaker, methods of making and methods of use are also described.... | 12/19/2000 |
| 6143699 | Process for reducing permeability in a subterranean formation A method is provided for blocking high permeability channels in subterranean geological formations, using swelling clay. A slurry is prepared by mixing swelling clay, such as bentonite, into an aqueous solution containing the salt of certain cations, whic... | 11/07/2000 |
| 6143698 | Method for removing filtercake A method for removing filtercake from a subterranean borehole comprising drilling the borehole with a drilling fluid that includes additives to form a filtercake having an oxidation-degradable component, preferably a polysaccharide. The filtercake is cont... | 11/07/2000 |
| 6133205 | Method of reducing the concentration of metal soaps of partially esterified phosphates from hydrocarbon flowback fluids A method is disclosed for reducing the concentration of metal soaps of partially esterified phosphates from a hydrocarbon flowback fluid resulting from a hydraulic fracturing fluid operation using an alkaline aqueous-based additive solution.... | 10/17/2000 |
| 6017856 | Well servicing fluids The invention relates to an aqueous well servicing fluid comprising in solution a potassium formate characterized in that said solution contains in addition potassium citrate. The potassium citrate, which can be added as a solid to a potassium formate sol... | 01/25/2000 |
| 5874386 | Method for cleaning drilling fluid solids from a wellbore using a surfactant composition A method and composition for removing deposits of heavy hydrocarbonaceous materials and finely divided drilling fluid solids from a wellbore using a composition containing an alkyl polyglycoside, an ethoxylated alcohol, a caustic and an alkyl alcohol by i... | 02/23/1999 |
| 5804535 | Well drilling and servicing fluids and methods of increasing the low shear rate viscosity thereof A well drilling and servicing fluid comprising a brine having dissolved therein a formate salt selected from the group consisting of potassium formate, cesium formate, and mixtures thereof, a biopolymer viscosifier, and a pre-gelatinized amylopectin deriv... | 09/08/1998 |
| 5629271 | Methods of reducing fluid loss and polymer concentration of well drilling and servicing fluids The invention provides methods for (1) reducing the fluid loss of and (2) reducing the concentration of polymer required to provide a desired degree of fluid loss control to, a well drilling and servicing fluid which contains at least one polymeric viscos... | 05/13/1997 |
| 5602083 | Use of sized salts as bridging agent for oil based fluids An oil-based fluid system has been discovered using a distribution of salt particle sizes, an oil or water/oil emulsion, a suspending agent for suspending the salt particles in the oil and a filtration control agent. It is important that the salt particle... | 02/11/1997 |
| 5458197 | Well cleanout system and method Oil or water based drilling muds, together with other wellbore contaminants such as pipe thread sealants and lubricants are displaced from the well and the wellbore surfaces are cleaned by a system of four serially pumped fluid pills. The first stage flui... | 10/17/1995 |
| 5291950 | Method of well treatment A method of well treatment designed to enhance recovery of resources from the well. A solution with an alkaline pH greater than 8 is introduced into the well and allowed to react in the well for at least a minimum period of time. A neutral solution with a... | 03/08/1994 |
| 4625802 | Potassium silicate clay stabilization process An aqueous solution having potassium silicate dissolved therein is injected into a subterranean sandstone formation containing water-sensitive fine particles, including clays. Potassium silicate stabilizes the fine particles for a substantial period of ti... | 12/02/1986 |
