| Patents for C09K 8 - Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations (31,745) |
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| 04/24/2013 | CN102181275B Composite hydrate inhibitor and application thereof |
| 04/24/2013 | CN102162350B Method for improving flooding effect of polymer solution by using calcium and magnesium ions in water |
| 04/24/2013 | CN102134283B Preparation method of associated modified xanthan gum |
| 04/24/2013 | CN102108295B Basic anionic surfactant fracturing fluid |
| 04/24/2013 | CN102102013B Inorganic boron high-temperature delayed fracturing fluid |
| 04/24/2013 | CN102071919B Oil-gas well fiber assisted water control fracturing method |
| 04/24/2013 | CN102051160B High-density bound water killing fluid |
| 04/24/2013 | CN102040991B Low solid phase drilling fluid filter cake removing system |
| 04/24/2013 | CN102040987B 230 DEG C resistance retarder for oil-well cement and preparation method thereof |
| 04/24/2013 | CN102031102B Preparation method and fracturing construction method of locally and continuously mixed clean fracturing fluid additive |
| 04/24/2013 | CN101970599B Method and composition for enhanced hydrocarbons recovery |
| 04/24/2013 | CN101955764B Clay-free drilling fluid filter cake removing system |
| 04/24/2013 | CN101942297B Fatty acid amide potassium phosphate betaine surfactant for tertiary oil recovery, and preparation method and application thereof |
| 04/24/2013 | CN101906296B Camellia saponin type oilfield foaming agent and preparation method and application thereof |
| 04/24/2013 | CN101899290B Foam discharging agent used for drainage gas recovery in high-temperature water-producing gas well |
| 04/24/2013 | CN101875839B Multifunctional preparation for controlling biological corrosion and blockage of oilfield production system |
| 04/24/2013 | CN101838526B Corrosion inhibiting and scale clearing scale inhibitor for oil wells |
| 04/24/2013 | CN101831281B High-dispersion modified asphalt powder and preparation method thereof |
| 04/24/2013 | CN101824313B Ultra-diluted compound oil displacement system |
| 04/24/2013 | CN101775273B High-temperature resistance base fluid for well cementing of oil gas well, preparation method and application thereof |
| 04/24/2013 | CN101737025B Method for reducing viscosity of crude oil |
| 04/24/2013 | CN101693830B Low-cost water-based clean fracturing fluid and gel breaking fluid used for fracturing |
| 04/24/2013 | CN101679845B Oil-well cement fluid loss additive composition |
| 04/24/2013 | CN101235279B Highly effective viscosity-reducing agent for thermodynamic oil extraction process |
| 04/24/2013 | CN101210174B Nano oil displacement agent for thermodynamic oil extraction process |
| 04/24/2013 | CN101210173B Highly effective pour depressant for thermodynamic oil extraction process |
| 04/23/2013 | US8426498 Drag reduction of asphaltenic crude oils |
| 04/23/2013 | US8426346 Polycarboxylic acid gelling agents |
| 04/23/2013 | US8424619 Drilling fluid |
| 04/23/2013 | US8424603 Multifunctional boronic crosslinkers and associated methods |
| 04/23/2013 | US8424600 Methods and systems for treating subterranean wells |
| 04/23/2013 | CA2615024C Non-phosphorus-based gellant for hydrocarbon fluids |
| 04/23/2013 | CA2581360C Lost circulation additive for drilling fluids |
| 04/23/2013 | CA2573503C Method for terminating or reducing water flow in a subterranean formation |
| 04/23/2013 | CA2550834C Clay control additive for wellbore fluids |
| 04/18/2013 | WO2013055843A1 Cement oil-based mud spacer formulation |
| 04/18/2013 | WO2013055213A1 Enhanced hydrocarbon recovery |
| 04/18/2013 | WO2013053770A1 Method of inhibiting the formation of gas hydrates using amine oxides |
| 04/18/2013 | WO2013053766A1 Method of inhibiting the formation of gas hydrates using amidines and guanidines |
| 04/18/2013 | WO2013010050A3 Low surface friction proppants |
| 04/18/2013 | WO2012174370A3 Composition of polybutadiene-based formula for downhole applications |
| 04/18/2013 | WO2012025800A8 Delivery of particulate material below ground |
| 04/18/2013 | US20130096037 Thermoset nanocomposite particles, processing for their production, and their use in oil and natural gas drilling applications |
| 04/18/2013 | US20130096036 Nanoemulsions |
| 04/18/2013 | US20130095562 Oil release with amino acid-based compounds having a long chain n-acyl group |
| 04/18/2013 | US20130092377 Use of a chopper mechanism to add fibers to a well |
| 04/18/2013 | US20130092376 Cement oil-based mud spacer formulation |
| 04/18/2013 | CA2850370A1 Cement oil-based mud spacer formulation |
| 04/17/2013 | EP2581432A1 Enhanced hydrocarbon recovery |
| 04/17/2013 | EP2580302A1 Far field diversion technique for treating subterranean formation |
| 04/17/2013 | EP2580301A1 Swellable/degradable "sand" plug system for horizontal wells |
| 04/17/2013 | EP2580300A1 An oil-based grouting composition with an insulating material |
| 04/17/2013 | EP2580299A1 Wellbore servicing compositions and methods of making and using same |
| 04/17/2013 | EP2580172A1 A water-based grouting composition with an insulating material |
| 04/17/2013 | CN103052650A Nonionic hydrophobically substituted cellulose ethers |
| 04/17/2013 | CN103045227A Multi-component retarded acid for acidizing sandstone reservoir |
| 04/17/2013 | CN103045226A Resistance reducing agent and preparation method thereof, and slickwater fracturing fluid using resistance reducing agent and preparation method thereof |
| 04/17/2013 | CN103045225A High-efficiency concentrated inorganic boron crosslinked fluid and preparation method thereof |
| 04/17/2013 | CN103045224A Preparation method of viscous oil viscosity reducer containing quaternary ammonium salt structure |
| 04/17/2013 | CN103045223A Thick oil emulsification viscosity depressant |
| 04/17/2013 | CN103045222A Nanometer emulsification and viscosity reduction agent applied to field of viscosity reduction of crude oil |
| 04/17/2013 | CN103045221A Surfactant flooding system and application thereof |
| 04/17/2013 | CN103045220A Preparation method for refracturing plugging agent based on controlling pre-crosslinked poly-cross ratio |
| 04/17/2013 | CN103045219A Preparation method of repeated fracturing blocking agent based on control of concentration of gel breaker |
| 04/17/2013 | CN103045218A Refracturing plugging agent for oilfield exploitation |
| 04/17/2013 | CN103045217A Preparation method of repeated fracturing plugging agent |
| 04/17/2013 | CN103045216A Refracturing plugging agent preparation process based on control of reaction temperature |
| 04/17/2013 | CN103045215A Aluminate cement-based carbon dioxide corrosion resistant cement system for cementing of well |
| 04/17/2013 | CN103045214A Plugging thixotropic cement paste for oil-gas well and preparation method for same |
| 04/17/2013 | CN103045213A Pre-chelated chitosan well cemented slurry retarder and preparation method thereof |
| 04/17/2013 | CN103045212A Microcapsule guar gum and preparation method thereof |
| 04/17/2013 | CN103045211A Method for preparing repeated fracturing blocking agent based on selective gel breaker |
| 04/17/2013 | CN103045210A High-efficiency plugging oil-base drilling fluid and preparation method thereof |
| 04/17/2013 | CN103045209A Clean lubricant capable of preventing bit balling |
| 04/17/2013 | CN103045208A Polysulfonate water-based drilling fluid |
| 04/17/2013 | CN103045207A Preparation technology of high temperature resistant drilling fluid with high density for controlling tackifier addition |
| 04/17/2013 | CN103045206A Polysulfonate water-based drilling fluid for remarkably increasing system density |
| 04/17/2013 | CN103045205A Preparation process of drilling fluid based on control of addition of filtrate reducer |
| 04/17/2013 | CN103045204A Preparation process of drilling fluid based on control of addition of fluid stabilizer |
| 04/17/2013 | CN103045203A High-density water-based drilling fluid saturated salt water mixture |
| 04/17/2013 | CN103045202A High-density polysulfonate water-based drilling fluid |
| 04/17/2013 | CN103045201A Preparation technology of high temperature resistant high-density drilling fluid |
| 04/17/2013 | CN103045200A Drilling fluid preparation technology for controlling dosage of anti-friction agent |
| 04/17/2013 | CN103045199A Process for preparing drilling fluid based on control of dosage of viscosity reducer |
| 04/17/2013 | CN103045198A Leakage prevention drilling fluid system applicable to natural gas well |
| 04/17/2013 | CN103045197A Water-based drilling fluid saturated salt water mixture for remarkably increasing system density |
| 04/17/2013 | CN103045196A Process for preparing drilling fluid based on weighting material |
| 04/17/2013 | CN103045195A Preparation process of drilling fluid based on control of addition of rigid blocking agent |
| 04/17/2013 | CN103045194A Reservoir protection drilling fluid system applicable to natural gas well |
| 04/17/2013 | CN103045193A Process for preparing drilling fluid with remarkably improved rheological property |
| 04/17/2013 | CN103045192A Preparation technology of high temperature resistant drilling fluid with high density for controlling bentonite addition |
| 04/17/2013 | CN103045191A Low-corrosion low-solid phase high-inhibition drilling fluid and preparation method thereof |
| 04/17/2013 | CN103045190A Soluble weighting salt low-damage drilling fluid and preparation method thereof |
| 04/17/2013 | CN103045189A Low-permeability solid-free completion fluid |
| 04/17/2013 | CN103045188A Plugging-type filtrate reducer for water-based drilling fluid and preparation method thereof |
| 04/17/2013 | CN103045187A Low-fluorescent-oil-based lubricant for drilling fluid based on reclaimed oil and derivatives thereof |
| 04/17/2013 | CN103045186A Quickly dispersed asphalt powder for drilling fluid and preparation method of quickly dispersed asphalt powder |
| 04/17/2013 | CN103045185A Super-high density drilling fluid dispersing agent and preparation method thereof |
| 04/17/2013 | CN103045184A Ultralow-permeation plugging anti-sloughing oil layer protective agent for drilling fluid and preparation method of protective agent |
| 04/17/2013 | CN103045183A Illegal cooking oil lubricant and preparation method thereof |