| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 507224000 |
Polymer derived from acrylic acid monomer or derivative
| 90 |
| 507222000 |
Polymer derived from monomer having quaternary ammonium group
| 16 |
| 507230000 |
Polymer contains vinyl alcohol unit
| 10 |
| 507231000 |
Carbocyclic ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding (e.g., styrene, vinyl toluene, etc.)
| 7 |
| 507227000 |
Sulfur is attached directly or indirectly to the ethylenic monomer by nonionic bonding | 2 |
| 20080248975 | DRILLING FLUID - This invention is based upon the finding that certain chlorosulfonated α-olefin copolymers can be beneficially utilized in drilling fluids that are utilized in drilling subterreanean wells. For instance, it has been unexpectedly found that certain chlorosulfonated α-olefin copolymers can be beneficially used as total or partial replacements for organoclays in oil based drilling fluids. The chlorosulfonated α-olefin copolymers that are useful in the practice of this invention are typically chlorosulfonated ethylene/octene copolymers or chlorosulfonated ethylene/butene copolymers. The chlorosulfonated α-olefin copolymers will contain from 0.2 to 5 weight percent sulfur. The utilization of chlorosulfonated α-olefin copolymers in oil-based drilling fluids offers (1) long service life at high operating temperatures, (2) minimal formation damage, (3) improved filtration behavior, and (4) highly effective performance at low viscosifier levels. Additionally, the chlorosulfonated α-olefin copolymers utilized in the practice of this invention are soluble in conventional drilling fluid formulations which reduce the level of mixing required in preparation of the drilling fluid formulation. This makes the preparation of the drilling fluid easier, faster and less energy intensive. The chlorosulfonated α-olefin copolymers used in making the drilling fluids of this invention are also free flowing powders which makes them easier to handle than the sulfonated EPDM (ethylene-propylene-diene monomer rubbers) crumbs employed in the drilling fluids of the prior art. The present invention more specifically discloses an oil-based drilling fluid which is comprised of: (a) an organic liquid; (b) water; (c) an emulsifier; (d) a wetting agent; (e) a fluid loss reducing agent; (f) a weighting material; and (g) a chlorosulfonated α-olefin copolymer. The subject invention further reveals a process for drilling a well into a subterranean formation which comprises boring a hole into the earth by rotary drilling, wherein an oil-based drilling fluid is circulated down a drilling pipe and returned to the surface of the earth through a pipe hole annulus, wherein the oil-based drilling fluid is comprised of (a) an organic liquid; (b) water; (c) an emulsifier; (d) a wetting agent; (e) a fluid loss reducing agent; (f) a weighting material; and (g) a chlorosulfonated α-olefin copolymer. | 10-09-2008 |
| 20120322699 | Method of Preventing Scale Formation During Enhanced Oil Recovery - A method for preventing scale formation during an alkaline hydrocarbon recovery process is disclosed. An aqueous solution (e.g., recovered sea water, water produced from the subterranean reservoir, or a combination thereof) having a concentration of metal cations (e.g., calcium, magnesium) is provided. A stoichiometric amount of an organic complexing agent relative to the concentration of metal cations is introduced into the aqueous solution such that the organic complexing agent forms aqueous soluble cation-ligand complexes with the metal cations. At least one alkaline is introduced into the aqueous solution to form an injection fluid having a pH value of at least 10. The cation-ligand complexes remain soluble in the injection fluid such that scale formation is prevented when the injection fluid is injected into a subterranean reservoir. | 12-20-2012 |
| 507229000 |
Hetero nitrogen ring is attached directly or indirectly to the ethylenic monomer by nonionic bonding | 1 |
| 20150337196 | METHOD FOR INHIBITING STRUCTURE II GAS HYDRATE FORMATION - The present invention provides a method for inhibiting structure II (sII) gas hydrate formation which comprises treating (i) a gas hydrate inhibitor and (ii) at least one additive selected from the group consisting of N-hexyl-N-methyl-pyrrolidinium tetrafluoroborate (HMP-BF | 11-26-2015 |
| Entries |
| Document | Title | Date |
|---|
| 20080261834 | Method and Composition for Treatment of a Well - The invention provides a material comprising: a core made of a solid material; a first layer surrounding the core made of a swellable material able to swell in contact with a fluid ; a second layer surrounding the first layer made of a glue material able to glue to a third element. | 10-23-2008 |
| 20080318812 | OIL BASED CONCENTRATED SLURRIES AND METHODS FOR MAKING AND USING SAME - New hydrocarbon based slurry compositions and drilling, fracturing, completion and production fluids including the hydrocarbon based slurry composition are disclosed, where the composition includes a hydrocarbon soluble polymer adapted to decrease particle settling rates of particulate materials present in the fluids and in the case of fluids that include hydratable materials to increase hydration properties of such materials. | 12-25-2008 |
| 20090143258 | Methods and compostions for preventing scale and diageneous reactions in subterranean formations - Methods and compositions useful to prevent scale formation and/or diageneous reactivity on mineral surfaces residing or to be placed in subterranean formations, are provided. In one embodiment, the methods comprise: providing an anionic polymer and a cationic surfactant; contacting a mineral surface with the anionic polymer and the cationic surfactant; and allowing the anionic polymer and the cationic surfactant to interact with each other, whereby a film is formed on at least a portion of the mineral surface. | 06-04-2009 |
| 20090197781 | Wellbore Fluids Comprising Poly(trimethylene ether) glycol Polymers - Wellbore fluids containing poly(trimethylene ether)glycols are provided. The wellbore fluids can provide enhanced functionality, improved cost effectiveness, and reduced environmental impact as compared to conventional wellbore fluids. | 08-06-2009 |
| 20090221454 | Methods of Using Reactive Surfactants in Subterranean Operations - Novel uses of reactive surfactants in treating subterranean formations and/or proppant particulates are provided. In one embodiment, the present invention provides a surfactant-treated proppant particulate comprising a proppant particulate that comprises at least one surface that has been allowed to interact with a reactive surfactant. | 09-03-2009 |
| 20090264323 | CONSOLIDATED PROPPANTS HAVING HIGH MECHANICAL STRENGTH AND PROCESS FOR THE PREPARATION THEREOF - A process for the preparation of hydrolytically and hydrothermally stable consolidated proppants is described, in which (A) a consolidating agent comprising (A1) a hydrolysate or precondensate of at least one functionalized organosilane, a further hydrolyzable silane and at least one metal compound, the molar ratio of silicon compounds used to metal compounds used being in the range of 10 000:1 to 10:1, and (A2) an organic crosslinking agent are mixed with a proppant and (B) the consolidating agent is cured at elevated pressure and elevated temperature. | 10-22-2009 |
| 20090298722 | Emulsion Breaker - This invention provides acrylate polymers having at least two different ester groups. The ester groups are selected from the following:
| 12-03-2009 |
| 20100022419 | COMPOSITION AND METHOD FOR RECOVERING HYDROCARBON FLUIDS FROM A SUBTERRANEAN RESERVOIR - This invention is directed to a composition comprising expandable polymeric microparticles comprising an interpenetrating polymer network (IPN). The IPN constrains the microparticle to an unexpanded volume average particle size diameter of from about 0.05 to about 5,000 microns. Labile cross-links in the polymers of the IPN are subject to degradation, which results in release of the expandable microparticle so that the microparticle expands. The invention is further directed to the use of the composition for modifying the permeability of subterranean formations and increasing the mobilization and/or recovery rate of hydrocarbon fluids present in the formations. | 01-28-2010 |
| 20100204070 | LOW DENSITY COMPOSITE PROPPING AGENTS - Composite propping agents of low density and of high mechanical strength are based on a thermoplastic polymer matrix, in particular having low compressive deformation at high temperatures are especially useful in the field of well fracturing for the recovery of sludges, liquids and gases present in underground reservoirs, and in particular in the field of the extraction of hydrocarbons, such as crude oil or natural gas. | 08-12-2010 |
| 20120165233 | GRAVEL PACK FLUID COMPOSITION AND EMULSION THEREFOR - A gravel pack composition comprising i) a water-in-oil emulsion comprising: a) an organic continuous phase comprising 0.1 to 5 vol % of the emulsion of non-ionic or cationic surfactant and 0.25 to 3 vol % of the emulsion of sorbitan ester; b) a dispersed aqueous phase comprising 0.05 to 3 vol % of the emulsion of a partial ester of a polyol with at least one C6 to C22 fatty acid and at least one of an acid, acid precursor, and a chelating agent; and c) a density control agent; and ii) gravel. The fluid can display a delayed break of up to about 72 hours to enable clean-up of mud cake. | 06-28-2012 |
| 20130023449 | Scale Inhibitor - This invention relates to a process for inhibiting scaling in a subterranean oil or gas producing formation, comprising adding to the formation a composition comprising a metal chelant, a scale inhibitor and divalent metal cations, wherein the stability constant of the metal chelant—metal cation chelate at ambient temperature is equal to or higher than the stability constant of the chelate formed from the metal cations and the scale inhibitor, and wherein the solubility of the chelate formed from the metal cations and the scale inhibitor decreases with increasing temperature. | 01-24-2013 |
| 20130096038 | ENHANCED OILFIELD SWELLABLE ELASTOMERS AND METHODS FOR MAKING AND USING SAME - Swellable elastomeric compositions including an elastomer, a covalent crosslinking system and an ionic crosslinking system, where the composition have improved rate of swelling in water, brines and aqueous solutions, swellability, and/or physical properties of the compositions | 04-18-2013 |
| 20130324446 | EMULSION BREAKERS INCLUDING POLYESTER FUNCTIONALITIES - An emulsion breaker composition, a method of making the emulsion breaker, and method of breaking an emulsion are disclosed. In one method, an emulsion is contacted with an effective amount of an emulsion breaker composition. The emulsion breaker is a linear or branched polymer having at least one branch, wherein each branch has a first polymer block having a backbone including a plurality of ester groups and a second polymer block including an alkoxylate, and wherein at least two of the ester groups are connected by a —CR1R2 group. The emulsion breakers are preferably formed by reacting a polyol with a cyclic ester monomer in the presence of a first catalyst to form an intermediate polymer having a plurality of branches, wherein each branch has a backbone including a plurality of ester groups, and then reacting the intermediate polymer with at least one alkylene oxide species in the presence of a second catalyst to form an alkoxylate block on each branch. | 12-05-2013 |
| 20140073540 | ACID-IN-OIL EMULSION COMPOSITIONS AND METHODS FOR TREATING HYDROCARBON-BEARING FORMATIONS - Disclosed herein is an acid-in-oil emulsion composition comprising an emulsifying agent; a dispersion agent; a base oil; and an acid, wherein the acid-in-oil emulsion composition is substantially devoid of priority pollutants. Disclosed herein too is a method for treating a hydrocarbon-bearing formation comprising blending an emulsifying agent, a base oil and an acid to produce an acid-in-oil emulsion, the acid-in-oil emulsion being substantially devoid of priority pollutants; and discharging the acid-in-oil emulsion into a downhole hydrocarbon-bearing well formation, where the acid-in-oil emulsion is operative to stimulate hydrocarbon production. | 03-13-2014 |
| 20140162911 | PROPPANT WITH COMPOSITE COATING - Proppants for hydraulic fracturing of oil and gas wells have a polymeric coating that is strengthened with reinforcing particulates that are reactive with, or chemically bonded to, the polymeric proppant coating. Preferably, these particulates are added into the coating during the coating process. In one embodiment, functionalized particulates are used that become grafted into the polymer of the proppant coating through the chemical functionality imparted to the particulates. If non-functionalized particulates are used, a coupling agent is preferably added to enhance the bond strength between the added particulates and the polymeric matrix of the proppant coating. | 06-12-2014 |
| 20140274821 | REINFORCED HYDRAULIC FRACTURING FLUID PROPPANT AND METHOD - Composite mixtures are disclosed that include: (a) proppant, and (b) fibers, and/or (c) one or more of an organic binder, wax, gel, oil or polymeric binder. A method for improving the engineering properties of proppants includes adding one or more of the materials to the proppant, and mixing them for incorporation into a hydraulic fluid (such as water). Alternatively, the proppants, and/or fibers and/or other constituents may be added separately to a hydraulic fluid such as water. | 09-18-2014 |
