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| Number | Title | Issue Date |
| 7419939 | Mineral acid enhanced thermal treatment for viscosity reduction of oils (ECB-0002) The invention describes a method for decreasing the viscosity of crude oils and residuum utilizing a combination of thermal and acidic treatment. Further, the invention describes a method for making a water-in-oil emulsion, or a solids-stabilized water-in-oil emulsi... | 09/02/2008 |
| 7395863 | Method of treating a subterranean formation with an oil-based composition containing a polysaccharide-based water-superabsorbent material A well treating composition containing a polysaccharide-based water-superabsorbent material has particularly applicability as a thermal insulating, fracturing or acid stimulation fluid. The water-superabsorbent material is capable of absorbing, at a minimum, its own... | 07/08/2008 |
| 7392844 | Method of treating an oil or gas well with biodegradable low toxicity fluid system A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a fatty acid ester, such as methyl soyate. The fluid system may further contain a lactic acid ester, such as ethyl lactate, and/or a nonionic surfactant. Th... | 07/01/2008 |
| 7314850 | Methods and compositions for treating subterranean formations with gelled hydrocarbon fluids Improved methods and compositions for treating subterranean formations penetrated by well bores are provided. A method for breaking a gelled hydrocarbon fluid comprised of a hydrocarbon liquid, a ferric iron or aluminum polyvalent metal salt of a phosphonic acid est... | 01/01/2008 |
| 7293611 | CO miscible optimized hydrocarbon blends and methods of using CO miscible optimized hydrocarbon blends A method of treating a subterranean formation comprising the steps of providing a servicing fluid comprising carbon dioxide and a hydrocarbon blend, wherein the hydrocarbon blend comprises at least about 65% hydrocarbons having from six carbons (C6) to el... | 11/13/2007 |
| 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 |
| 7231976 | Method of treating an oil or gas well with biodegradable low toxicity fluid system A method of treating a well consists of introducing into the wellbore a biodegradable fluid system containing a blend of lactic acid ester, such as ethyl lactate, and a fatty acid ester, such as methyl soyate. The fluid system may be further in the form of a microem... | 06/19/2007 |
| 7229207 | Method for gel hydration system A hydration apparatus for use with a hydration tank. The hydration apparatus disperses incoming gel into existing gel in the hydration tank to increase the hydration time of the incoming gel. The hydration apparatus includes flow conduits communicated with gel inlet... | 06/12/2007 |
| 7199084 | Concentrated suspensions Suspensions are provided of water-soluble materials in non-aqueous carrier fluids using suspension agents that include thixotropic agents and, optionally, organophilic clays. Methods of forming such suspensions are provided. Methods are also provided for using such ... | 04/03/2007 |
| 7168490 | Optimized hydrocarbon blends and methods of using optimized hydrocarbon blends The present invention relates to servicing fluids for use in subterranean operations. More particularly, the present invention relates to improved servicing fluids comprising optimized hydrocarbon blends and methods of using such servicing fluids in subterranean for... | 01/30/2007 |
| 7163060 | Difunctional phosphorus-based gelling agents and gelled nonaqueous treatment fluids and associated methods The present invention provides methods of treating a portion of a subterranean formation, one of which includes: providing a gelled nonaqueous treatment fluid that comprises a nonaqueous base fluid and a difunctional gelling agent that comprises a polyvalent metal s... | 01/16/2007 |
| 7125826 | Methods of using invertible oil external-water internal fluids in subterranean applications Methods of using invertible oil external-water internal emulsions in drilling, hydraulic fracturing, gravel packing and completion and then inverting the emulsion to a water external-oil internal emulsion are provided. The methods basically comprise the steps of con... | 10/24/2006 |
| 7108066 | Variable density treatment fluids and methods of using such fluids in subterranean formations The present invention provides variable density fluid compositions and methods for using such compositions in a subterranean formation. One exemplary embodiment of the variable density fluid compositions of the present invention comprises a variable density fluid co... | 09/19/2006 |
| 7090017 | Low cost method and apparatus for fracturing a subterranean formation with a sand suspension The present invention is directed to a low cost method and apparatus for fracturing a subterranean formation. The invention involves using a centrifugal pump to combine a fracture fluid, a sand suspension and liquid additive and discharge a mixture of these componen... | 08/15/2006 |
| 7066262 | Gelled liquid hydrocarbon treatment fluids having reduced phosphorus volatility and their associated methods of use and preparation This invention relates to reduced volatility gelled liquid hydrocarbon treatment fluids and methods of their use and preparation. In one embodiment, this invention provides a method of treating a portion of a subterranean formation comprising: providing a reduced vo... | 06/27/2006 |
| 7036589 | Methods for fracturing stimulation The present invention provides methods for fracturing and for reducing the production of both water and particulates from subterranean formations. The methods are particularly useful in conjunction with subterranean formations surrounding wellbores and fractures. Th... | 05/02/2006 |
| 7025134 | Surface pulse system for injection wells The present invention relates to petroleum recovery operations, and more particularly, to the use of pulse technology to enhance the effectiveness of waterflooding operations. The systems of the present invention generally comprise an injection means for continually... | 04/11/2006 |
| 6945327 | Method for reducing permeability restriction near wellbore Method is provided for increasing the productivity of gas wells producing from reservoirs where retrograde condensation occurs around the wells. An oil-wetting surfactant is injected in a solvent to oil wet the formation for a selected distance around a well or a hy... | 09/20/2005 |
| 6939555 | Manufacture and use of an deposition aid The invention pertains to a method for increasing the activity of agrichemicals and controlling their drift by specially formulating an deposition agent with fertilizer. This unique combination has been seen to allow lower use rates of fertilizers as pesticide effic... | 09/06/2005 |
| 6818594 | Method for the triggered release of polymer-degrading agents for oil field use Disclosed are methods and related compositions for altering the physical and chemical properties of a substrate used in hydrocarbon exploitation, such as in downhole drilling operations. In a preferred embodiment a method involves formulating a fluid, tailored to th... | 11/16/2004 |
| 6187720 | Delayed release breakers in gelled hydrocarbons Granules composed of a particulate breaker chemical dispersed in a wax matrix are used in fracturing operations to break hydrocarbon liquids gelled with salts of alkyl phosphate esters. The wax granules are solid at surface temperature and melt or dispers... | 02/13/2001 |
| 6169058 | Compositions and methods for hydraulic fracturing A subterranean formation is treated by introducing a fracturing treatment composition comprising a polymer treatment fluid containing a dispersion of hydrophilic water swellable particles into the formation. The water swellable particles comprise syntheti... | 01/02/2001 |
| 6054417 | Rapid gel formation in hydrocarbon recovery Method and composition for gel formation in hydrocarbon recovery, in which an organic phosphate ester is gelled by a novel activator composition comprising iron sulfate, dibutylaminoethanol, and a phosphate surfactant.... | 04/25/2000 |
| 5948735 | Use of breaker chemicals in gelled hydrocarbons Oil degradable encapsulated breaker particles are used in fracturing operations to break hydro-carbon liquid gelled with salts of alkyl phosphate esters. The preferred breaker chemical is particulate urea coated with sulfonated EPDM.... | 09/07/1999 |
| 5846915 | Delayed breaking of gelled hydrocarbon fracturing fluid 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 us... | 12/08/1998 |
| 5649596 | Use of breaker chemicals in gelled hydrocarbons Oil degradable granules containing particulate breaker chemical is used in fracturing operations to break hydrocarbon liquid gelled with salts of alkyl phosphate esters. The preferred breaker chemical is powdered Ca(OH)2.... | 07/22/1997 |
| 5417287 | Hydrocarbon gels useful in formation fracturing This invention relates to improved hydrocarbon gels which find use in the fracturing of petroleum producing formations. In particular it relates to the use of a defined class of gelling agents for hydrocarbons which provide excellant results in such fract... | 05/23/1995 |
| 5273115 | Method for refracturing zones in hydrocarbon-producing wells A method is provided for refracturing a well which has previously been hydraulically fractured in a lower zone or in the same zone. A sealing material is injected and allowed to solidify, the well is reperforated and refractured.... | 12/28/1993 |
| 5082059 | Use of hydrocarbon-rich gels as fracturing fluids The present invention relates to the use of hydrocarbon-rich gels as fracturing fluids and also to fracturing fluids which are composed of a hydrocarbon-rich gel and an auxiliary.... | 01/21/1992 |
| 5057233 | Hydrocarbon geller and method for making the same An improved hydrocarbon gelling agent is disclosed comprising the reaction product of (1) a polyphosphate intermediate produced by reacting triethyl phosphate and phosphorous pentoxide and (2) a mixed alcohol having a substantial hexanol component, togeth... | 10/15/1991 |
| 5052486 | Method and apparatus for rapid and continuous hydration of polymer-based fracturing fluids A method and apparatus for continuously and rapidly hydrating a polymer-based fracturing fluid. The invention is based upon the efficient application of high shear energy in order to increase the rate of hydration of the polymer. The invention includes th... | 10/01/1991 |
| 4919209 | Method for treating subterranean formations A method for breaking the fracturing fluid comprises injecting into the subterranean formation a controlled release breaker capsule including an enclosure material enveloping a breaker. The enclosure material is sufficiently permeable to at least one flui... | 04/24/1990 |
| 4877894 | Hydrocarbon geller and method for making the same An improved hydrocarbon gelling agent is disclosed comprising the reaction product of (1) a polyphosphate intermediate produced by reacting triethyl phosphate and phosphorous pentoxide and (2) a mixed alcohol having a substantial hexanol component, togeth... | 10/31/1989 |
| 4828034 | Method of hydrating oil based fracturing concentrate and continuous fracturing process using same An improved method of mixing a fracturing fluid slurry concentrate comprising a hydrophobic solvent base (e.g., diesel No. 2) and a dispersed hydratable polymer (e.g., hydroxypropyl guar) on a real time basis thus continuously producing a fully hydrated f... | 05/09/1989 |
| 4825952 | Fracturing process for low permeability reservoirs employing a compatible hydrocarbon-liquid carbon dioxide mixture A method is described for fracturing a subterranean formation penetrated by a wellbore. A fracturing fluid in the form of a mixture of liquid carbon dioxide and a liquid hydrocarbon component of specific characteristics is injected down the wellbore under... | 05/02/1989 |
| 4795574 | Low temperature breakers for gelled fracturing fluids A method of breaking gelled viscosities of oil-based gelled fracturing fluids used in low temperature formations having operating temperatures ranging between about 60°-120° F. which comprises treating said oil-based gelled fracturing fluids with an eff... | 01/03/1989 |
| 4739834 | Controlled hydraulic fracturing via nonaqueous solutions containing low charge density polyampholytes A process for fracturing a subterranean formation surrounding a gas or oil well which comprises: (a) injecting into said subterranean formation under hydraulic pressure a fluid comprising a solution of terpolymer dissolved in a solvent system, said solven... | 04/26/1988 |
| 4665982 | Formation fracturing technique using liquid proppant carrier followed by foam A hydraulic fracturing process includes the step of pumping into the well a fracturing liquid containing a proppant for fracturing the formation and delivering the proppant into the fracture. At or near the end of the fracturing operation, a foam slug is ... | 05/19/1987 |
| 4622155 | Method for fracturing subterranean formations The present invention provides a method of forming an easily pumpable gelled fluid which is capable of yielding an apparent viscosity of in excess of about 100 centipoise at a shear rate of 40 sec-1 for in excess of about six hours at a tempera... | 11/11/1986 |
| 4615393 | Hydrocarbon soluble polymer complexes useful as viscosifiers in fracturing operations A process for fracturing a subterranean formation surrounding a gas or oil well which comprises injecting into said subterranean formation under hydraulic pressure a fluid comprising about 0.01 to about 25 weight percent of a water insoluble polymer compl... | 10/07/1986 |
