Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7399732 | Fracturing fluid containing amphoteric glycinate surfactant An improved method and fracturing fluid for hydraulic fracturing of a subterranean formation, the fracturing fluid including a surfactant, a water soluble or dispersible anionic organic salt, an acid and a low molecular weight organic solvent. ... | 07/15/2008 |
| 7166560 | Generating Acid Downhole in Acid Fracturing An acid fracturing method is provided in which the acid is generated in the fracture by hydrolysis of a solid acid-precursor selected from one or more than one of lactide, glycolide, polylactic acid, polyglycolic acid, a copolymer of polylactic acid and polyglycolic... | 01/23/2007 |
| 7165613 | Propped fracture with high effective surface area Propped fractures in formations from which fluids are produced are described that have wormholes extending out into the formations from the faces of the fractures at locations distant from boreholes. Methods are given for creating such propped fractures having wormh... | 01/23/2007 |
| 7086469 | Increasing reaction efficiency of acetic acid A method for removing or dissolving calcareous materials in a subterranean formation or in a wellbore consists of two basic steps. In the first step, an aqueous acid solution is injected into the formation or wellbore. The aqueous acid solution contains between from... | 08/08/2006 |
| 6855672 | Copolymers useful for gelling acids Disclosed is a copolymer useful for preparing acid gels comprising a copolymer having a copolymer backbone, the copolymer having a general formula: wherein: (a) A is an H or other terminating group; (b) R1 i... | 02/15/2005 |
| 6849582 | Method of oil/gas well stimulation Stimulation, particularly fracturing or acidising, of hydrocarbon wells having bores leading to hydrocarbon bearing uses a fluid including a continuous phase of or including a compound of the formula (1): (R2)p—Ph—(CH2)m | 02/01/2005 |
| 6844297 | Fracturing method using aqueous or acid based fluids An improved method and fracturing fluid for hydraulic fracturing of a subterranean formation, the fracturing fluid comprising a surfactant, a water soluble or dispersible anionic organic salt, an acid and a low molecular weight organic solvent. ... | 01/18/2005 |
| 6828280 | Methods for stimulating hydrocarbon production Methods are provided for stimulation of hydrocarbon production from low permeability formations by hydraulic fracturing, acid fracturing, and hydraulic fracturing followed by gravel packing in a single operation. The methods use a first injected viscous pad made wit... | 12/07/2004 |
| 6637517 | Compositions containing aqueous viscosifying surfactants and methods for applying such compositions in subterranean formations The improved recovery of hydrocarbons from subterranean formations by hydraulically fracturing a subterranean formation is accomplished. Fracturing fluids using a viscosifying surfactant fluid containing viscosifying micelles, for example, wormlike micell... | 10/28/2003 |
| 6555505 | Foamed acidizing fluids, additives and methods of acidizing subterranean zones The present invention provides environmentally safe foamed acidizing fluids for acidizing subterranean zones, additives for foaming and stabilizing foamed acidizing fluids and methods of acidizing subterranean zones. The foamed acidizing fluids are basica... | 04/29/2003 |
| 6306800 | Methods of fracturing subterranean formations The improved recovery of hydrocarbons from subterranean formations by fracturing and matrix acidizing a subterranean formation is accomplished. Well treatment fluids having a viscoelastic surfactant fluid containing worm like micelles are useful to improv... | 10/23/2001 |
| 6306799 | Compositions for iron control in acid treatments for oil wells The invention relates to iron control in an acid medium for forestalling the formation of precipitates known as "sludges" (asphaltic products) in contact with certain crude oils. Use is made of compounds comprising a mercaptan function, and, in combinatio... | 10/23/2001 |
| 6225261 | Composition and method for controlling precipitation when acidizing wells A composition and method for acidizing a formation in the presence of ferric ion, free sulfur and/or sulfides is disclosed. The composition employs a ferric ion reducing agent and a sulfide reactant separately or in combination. The ferric ion reducing ag... | 05/01/2001 |
| 6207620 | Use of encapsulated acid in acid fracturing treatments A method of fracturing a subterranean formation, in which subterranean formation being in fluid communication with the surface includes creating a fracture in said subterranean formation, said fracture having more than one fracture faces; and injecting in... | 03/27/2001 |
| 6197730 | Compositions for fracturing subterranean formations A method of fracturing a subterranean formation which surrounds a well bore comprises the steps of providing a fracturing fluid, and injecting the fracturing fluid into the well bore at a pressure sufficient to form fractures in the subterranean formation... | 03/06/2001 |
| 6165947 | Method and composition for controlling fluid loss in high permeability hydrocarbon bearing formations A chemical system and method to stop or minimize fluid loss during completion of wells penetrating hydrocarbon formations are provided. The inventions relates to formulating a highly stable crosslinked hydroxyethyl cellulose (HEC), control released viscos... | 12/26/2000 |
| 6046140 | Acid gels for fracturing subterranean formations A crosslinked acid gel comprising an emulsion polymer and an external activator is provided. Methods for acid fracturing subterranean formations using the crosslinked acid gel are also provided.... | 04/04/2000 |
| 5975206 | Acid gels for fracturing subterranean formations A crosslinked acid gel comprising an emulsion polymer and an external activator is provided. Methods for acid fracturing subterranean formations using the crosslinked acid gel are also provided.... | 11/02/1999 |
| 5807812 | Controlled gel breaker Hydrocarbon fracturing fluids are made by combining organic phosphate esters with polyvalent metal salts in hydrocarbon carriers to form gels; breaking of the gel is retarded or otherwise controlled over a wide range of water concentrations, through the u... | 09/15/1998 |
| 5783526 | Process to enhance removal of adhering solids from the surface of wellbores and sand control devices therein The invention provides: (1) a process to enhance the removal of solids such as clays, clay-like solids, and shale solids-drill solids-from the surface of a borehole, the solids being deposited from well drilling, completion, or workover fluids during well... | 07/21/1998 |
| 5762138 | Method of preventing incompatibility between aqueous well treating fluids and hydrocarbons The present invention provides microemulsion surfactant additives for use in aqueous well treating fluids to prevent the formation of stable emulsions and sludge when the aqueous treating fluids contact hydrocarbons. The additives are basically comprised ... | 06/09/1998 |
| 5756004 | Quaternary ammonium compounds useful for inhibiting metal corrosion The present invention provides improved quaternary ammonium compounds useful as metal corrosion inhibitors in aqueous acid solutions, methods of preparing the compounds, metal corrosion inhibited aqueous acid solutions containing the compounds and methods... | 05/26/1998 |
| 5633220 | High internal phase ratio water-in-oil emulsion fracturing fluid A high internal phase ratio water-in-oil emulsion containing an emulsifier comprising a block or graft copolymer the general formula (A-COO)mB or a reaction product of a polyalk(en)yl succinic anhydride and a polar compound having at least one ... | 05/27/1997 |
| 5604184 | Chemically inert resin coated proppant system for control of proppant flowback in hydraulically fractured wells Disclosed is an improvement in a method for propping a fracture adjacent a wellbore formed by injecting in said fracture a carrier fluid containing proppant coated with a curable resin which improvement comprises: a) using proppant coated with a resin fluid co... | 02/18/1997 |
| 5543387 | Surfactant additive for oilfield acidizing Subterranean oil-bearing formations are treated with aqueous acid solutions which include an effective amount of an alkoxylated alkyl substituted phenol sulfonate which exhibits both antisludge and demulsification properties.... | 08/06/1996 |
| 5529125 | Acid treatment method for siliceous formations A method of stimulating production in sandstone formations of oil and gas wells is achieved by using an acid system which slowly dissolves the silicate and clay formations of the sandstone to increase its permeability. The acid system uses phosphonate com... | 06/25/1996 |
| 5497830 | Coated breaker for crosslinked acid A particulate gel breaker for the controlled reduction in viscosity of aqueous acid compositions used in fracture acidizing of subterranean formations, such as in oil and gas wells, is formed for use with crosslinked polymer gels which are crosslinked wit... | 03/12/1996 |
| 5488083 | Method of gelling a guar or derivatized guar polymer solution utilized to perform a hydraulic fracturing operation A method of gelling a guar or derivatized guar polymer solution utilized to perform a hydraulic fracturing operation includes the step of adjusting the pH of the guar or derivatized guar polymer solution to between about 8.5 and 12.5. After adjusting the ... | 01/30/1996 |
| 5310002 | Gas well treatment compositions and methods An additive for addition to conventional well treatment fluids to enhance the ability of the fluids to be recovered from subterranean formations, to generate a foam in association with the fluids and/or to enhance the ability of the fluids to remove water... | 05/10/1994 |
| 4843118 | Acidized fracturing fluids containing high molecular weight poly(vinylamines) for enhanced oil recovery The inverse emulsion polymerization of a monomer of the formula ##STR1## wherein R and R1 represent hydrogen or a C1 -C4 alkyl group, using a surfactant system having a hydrophilic-lipophilic balance value from 4 to 9... | 06/27/1989 |
| 4770796 | Encapsulated breaker for cross-linked acid gel, fracture acidizing fluid containing same and method of use thereof Fracture acidizing fluids are provided containing an encapsulated breaker which releases breaker at a regulated rate over time.... | 09/13/1988 |
| 4752404 | Blends of water soluble polymers Blends of water soluble polymers containing varying ratios of acrylamide and sodium 2-acrylamido-2-methylpropane sulfonate are provided which synergistically increase the viscosity of acidic solutions. Improved methods of matrix acidizing and fracture aci... | 06/21/1988 |
| 4690219 | Acidizing using n-vinyl lactum/unsaturated amide copolymers Water soluble thickened acid compositions suitable for matrix or fracture acidizing are provided comprising water, an acid, and a water thickening amount of a copolymer of a N-vinyl lactam and an unsaturated amide. This composition can contain in addition... | 09/01/1987 |
| 4624795 | Aqueous acid gels and use thereof Copolymers of a predominant proportion of an olefinically unsaturated sulfonic acid, an acrylamide, a vinyl phosphonic acid, and optionally other copolymerizable vinyl monomers, form aqueous acid gel compositions when added to the aqueous acid along with ... | 11/25/1986 |
| 4604218 | Aqueous acid gels and use thereof Copolymers of a predominant proportion of an alkyl allyl ammonium halide and a vinyl phosphonic acid, optionally with other copolymerizable vinylidene monomers, form aqueous acid gel compositions when added to the aqueous acid, along with a gelling agent ... | 08/05/1986 |
| 4532052 | Polymeric well treating method Several new treatment processes and compositions for practicing these processes are provided which substantially alter the fluid flow and surface characteristics of porous permeable particulate formations, especially subterranean formations intersected by... | 07/30/1985 |
| 4500437 | Water soluble copolymers for use in fracture-acidizing of wells New copolymers soluble in water and aqueous acids are disclosed comprising in a statistical distribution in the macromolecule at least 5% by weight of entities containing a formylamino functionality and at least 10% by weight of entities containing an ami... | 02/19/1985 |
| 4487867 | Water soluble anionic polymer composition and method for stimulating a subterranean formation A composition and method for stimulating a subterranean formation. The composition contains an anionic polymer which is readily dispersible in water, having a molecular weight sufficient to thicken water, and a cationic or amphoteric polymer or mixtures t... | 12/11/1984 |
| 4476033 | Method and compositions for acidizing and fracturing wells Gelled-acid compositions suitable for matrix-acidizing or fracture-acidizing of subterranean formations and methods of using the composition in these operations are provided wherein the compositions comprise water, water-dispersible acrylamide-derived pol... | 10/09/1984 |
| 4466893 | Method of preparing and using and composition for acidizing subterranean formations A composition and method of acidizing or fracturing a subterranean formation comprising contacting the formation with a composition comprising an acid, urea, and a selected gelling agent. The urea is present in an amount sufficient to extend the viscous s... | 08/21/1984 |
