| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 507222000 | Polymer derived from monomer having quaternary ammonium group | 16 |
| 20090023616 | AQUEOUS FRACTURING FLUID - The invention concerns an aqueous viscoelastic fracturing fluid for use in the recovery of hydrocarbons. According to the invention, the fluid comprises a cleavable viscoelastic surfactant and a hydrophobically-modified polymer, wherein the cleavable surfactant comprises a head group and a hydrophobic tail of at least 18 carbon atoms connected through a degradable acetal, amide, ether or ester bond and wherein the concentration of the hydrophobically-modified polymer is comprised between its overlap concentration c* and its entanglement concentration c | 01-22-2009 |
| 20090203555 | Use of Relative Permeability Modifiers in Treating Subterranean Formations - A method for treating a subterranean formation penetrated by a wellbore utilizes forming at least one of a treatment fluid A and a treatment fluid B. The treatment fluid A comprises an aqueous carrier fluid, a first relative permeability modifier (RPM) polymer, a water-soluble viscosifying polymer and a crosslinking agent capable of crosslinking the viscosifying polymer at a pH of from about 3 to about 5. The treatment fluid B comprises a fresh-water carrier fluid and a second relative permeability modifier (RPM), and optionally an amount of fibers. At least one of the treatment fluids A and B is introduced into the formation through the wellbore. | 08-13-2009 |
| 20090253594 | Methods for placement of sealant in subterranean intervals - Of the many methods provided herein, one method includes a method of treating an interval of a subterranean formation having a permeability that varies comprising: identifying the interval to be treated; introducing a relative-permeability modifier into the interval, wherein the relative-permeability modifier modifies the interval to have a more uniform effective permeability to water, wherein the relative permeability modifier comprises a water-soluble polymer; and introducing a sealant into the interval, wherein the more uniform effective permeability of the interval allows for a more uniform treatment of the interval by the than would be allowed without treatment of the interval with the relative-permeability modifier. | 10-08-2009 |
| 20100120638 | ADDITIVES FOR OIL RECOVERY FROM RESERVOIRS - The invention relates to the use of quaternary polyamines having formula (I) for the recovery of oil from reservoirs formula (I), wherein n>=1 R | 05-13-2010 |
| 20100197529 | PROCESS FOR ENHANCED OIL RECOVERY - Method for enhanced oil recovery consisting in introducing into the injection water a solution containing at least one polymer and at least one surfactant, the surfactant/polymer weight ratio being between 1 and 10 and the surfactant concentration in the solution being higher than 100 ppm (parts per million), characterized in that the said polymer contains at least one hydrophobic cationic monomer. | 08-05-2010 |
| 20100210484 | CLAY CONTROL ADDITIVE FOR WELLBORE FLUIDS - A clay stabilizer which is capable of inhibiting swelling in a wide variety of clay types and is also capable of restoring permeability in formations which have previously been damaged by clay swelling. Amine salts of differing molecular weights configurations and ionic strength are combined to provide transport into micropores, mesopores and macropores in the formation and to effect cationic change therein. A poly quaternary amine having a high to very high charge density is added along with lower molecular weight amine salts to substantially permanently exchange cations with the clay in the formation. | 08-19-2010 |
| 20120129738 | OIL FIELD TREATMENT FLUIDS COMPRISING ZWITTERIONIC BETAINE-GROUP-CONTAINING POLYMERS - The present disclosure is directed to a method comprising: mixing (i) a zwitterionic polymer prepared by inverse emulsion polymerization of at least one monomer A | 05-24-2012 |
| 20120135895 | Compositions and Methods Relating to the Stabilization of Hydrophobically Modified Hydrophilic Polymer Treatment Fluids Under Alkaline Conditions - The present invention relates to methods and compositions for treating a water- and hydrocarbon-producing subterranean formation with a relative permeability modifier, and more specifically, to improved treatment fluids, methods for preparing treatment fluids, and methods for use thereof in a subterranean formation. Methods of the present invention comprise providing a treatment fluid comprising a relative permeability modifier, at least one surfactant, and an aqueous phase base fluid; and placing the treatment fluid in a subterranean formation. The relative permeability modifier comprises a hydrophobically modified hydrophilic polymer. The at least one surfactant is operable to maintain the relative permeability modifier in a dissolved state in the treatment fluid above a pH of about 8. | 05-31-2012 |
| 20120196776 | Oil Field Treatment Fluids - A method of servicing a well is disclosed. The method comprises mixing ingredients to form a well servicing fluid. The ingredients comprise (i) at least one surfactant chosen from alcohol ethoxylates, C | 08-02-2012 |
| 20120214714 | PROCESS FOR ACHIEVING IMPROVED FRICTION REDUCTION IN HYDRAULIC FRACTURING AND COILED TUBING APPLICATIONS IN HIGH SALINITY CONDITIONS - A process for achieving enhanced levels of friction reduction in high salinity conditions, particularly suited to slick-water hydraulic fracturing and coiled tubing applications, uses low charge and preferably uncharged water soluble high molecular weight polymers. A fracturing fluid is injected into a conduit. The fracturing fluid is an aqueous solution comprising at least one water soluble (co)polymer comprising less than 10 mol % ionic monomer(s), and the aqueous solution comprises total dissolved salts concentration ranging from 100,000 mg/L to up to the salt concentration at which the aqueous solution becomes saturated in salts. | 08-23-2012 |
| 20120258894 | Treatment Fluids Containing a Relative Permeability Modifier and a Companion Polymer Interacting Synergistically Therewith and Methods for Use Thereof - Methods and compositions are described for treating water- and hydrocarbon-producing subterranean formations with a relative permeability modifier at concentrations below those conventionally used in the art, while not substantially impacting the treatment fluid's performance. Treatment fluids described herein comprise a base fluid, a relative permeability modifier comprising a hydrophobically modified hydrophilic polymer, and a companion polymer interacting synergistically with the relative permeability modifier such that the treatment fluid is operable to reduce the water permeability or to increase an aqueous fluid injection pressure of at least a portion of a subterranean formation by more than the relative permeability modifier or the companion polymer acting alone at like concentration. The water permeability reduction and/or the aqueous fluid injection pressure increase can be more than additive. Methods described herein comprise placing such treatment fluids in at least a portion of a subterranean formation. | 10-11-2012 |
| 20130310285 | TREATMENT FLUID AND METHOD - A treatment fluid made of mineral acid, viscoelastic surfactant, at least one of a fluoride source and a chelant, and optionally a corrosion inhibitor. A method of combining a mineral acid, viscoelastic surfactant, at least one of a fluoride source and a chelant, and optionally a corrosion inhibitor, in a fluid mixture. A method of contacting a low-temperature formation with a fluid mixture of mineral acid, viscoelastic surfactant, at least one of a fluoride source and a chelant, and optionally a corrosion inhibitor. | 11-21-2013 |
| 20140162912 | SWELLABLE POLYMER WITH CATIONIC SITES - The invention is directed to long lasting crosslinked water-soluble swellable polymers, methods for making same, and their uses. More particularly, the invention relates to a composition comprising expandable polymeric particles having cationic sites as well as labile crosslinkers and stable crosslinkers, said particle mixed with a fluid. A particularly important use is as an injection fluid in petroleum production, where the expandable polymeric particles are injected into a target zones in the reservoirs and when the heat and/or a suitable pH in the reservoir cause degradation of the labile crosslinker and when the particle expands, the cationic sites in the polymer adsorb to negative sites of the rock in the formation, thus diverting water to lower permeability regions and improving oil recovery. However, many other uses are possible. | 06-12-2014 |
| 20140323366 | DRAG-REDUCING COPOLYMER COMPOSITIONS - A method of preparing and using a drag-reducing composition in a well treatment operation includes the step of preparing the drag-reducing composition by mixing a polymer emulsion that includes a first surfactant and a first solvent, with a second surfactant and a second solvent. The method continues with the step of combining the drag-reducing composition with an aqueous treatment fluid. The method further includes the step of injecting the drag-reducing composition and aqueous treatment fluid into a subterranean formation, a pipeline or a gathering line. | 10-30-2014 |
| 507223000 | Nitrogen of the quaternary ammonium group is a member of a hetero ring | 2 |
| 20120329684 | POLYMERIC GEL SYSTEM AND METHODS FOR MAKING AND USING SAME IN HYDROCARBON RECOVERY - Coacervate gels having excellent shear viscosities and other properties are made with anionic or cationic polymers, a smaller amount of a surfactant having a charge opposite that of the polymer, and a hydrophobic alcohol and an effective amount of a phosphorus-containing compound sufficient to increase the viscosity of coacervate gels up to 3 times as compared to the gels in the absence of the phosphorus-containing compound. The Zeta Potential of the gel is maintained at an absolute value of at least 20. Optional gel promoting additives include betaines and amine oxides. A preferred gel comprises poly diallyl dimethyl ammonium chloride, a lesser amount of sodium lauryl sulfonate, and lauryl alcohol. The gels are particularly useful in well drilling fluids and well fracturing fluids. | 12-27-2012 |
| 20160200967 | SELF-SUSPENDING PROPPANTS FOR HYDRAULIC FRACTURING | 07-14-2016 |
