| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
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| 10/09/2008 | US20080245528 Separating Device |
| 10/09/2008 | CA2682252A1 Treatment for recycling fracture water - gas and oil recovery in shale deposits |
| 10/09/2008 | CA2682246A1 Method and assembly for abrasive jet drilling |
| 10/08/2008 | EP1977074A1 Method of processing drilling fluid |
| 10/08/2008 | CN101280682A Complete hydraulic self-drilling type side pressure equipment |
| 10/08/2008 | CN101280673A Filtering type by-pass valve assembly |
| 10/08/2008 | CN101280672A By-pass valve assembly |
| 10/08/2008 | CN101280671A Concentric tube jet flow negative pressure sand washing apparatus and using method thereoof |
| 10/08/2008 | CN100424320C High-efficiency vacuum degasifier for gas-cutting drilling liquid |
| 10/07/2008 | US7432499 Method and apparatus for detecting while drilling underbalanced the presence and depth of water produced from the formation |
| 10/07/2008 | US7431846 Method for concentrating solids from drilling slurry |
| 10/07/2008 | US7431104 Device for transporting particles of a magnetic material and tool comprising such a device |
| 10/07/2008 | US7431091 Method and apparatus for wellbore fluid treatment |
| 10/07/2008 | US7431081 Device for removal and filtration of drilling fluid |
| 10/07/2008 | CA2514776C Method for completing a well using increased fluid temperature |
| 10/02/2008 | WO2008118868A1 Cuttings treatment and reuse |
| 10/02/2008 | WO2008118244A1 Method for treating a fractured formation |
| 10/02/2008 | WO2008117048A1 Method and apparatus for controlling the manufacture of well treatment fluid |
| 10/02/2008 | WO2008117005A1 Process for separation of water from slop mud |
| 10/02/2008 | WO2008095065A3 High density slurry |
| 10/02/2008 | WO2008085946A3 Drilling components and systems to dynamically control drilling dysfunctions and methods of drilling a well with same |
| 10/02/2008 | WO2007124041A3 A system and method for estimating supercharge pressure and initial pressure of a formation |
| 10/02/2008 | US20080236896 Apparatus and method for recovering oil-based drilling mud |
| 10/02/2008 | US20080236895 Apparatus and method for recovering oil-based drilling mud |
| 10/02/2008 | US20080236811 Equipment for pressurized adsorption of gaseous carbon dioxide from boiler flue gas for oil recovery by well injection |
| 10/01/2008 | CN201125687Y Split stream short node for gas drilling |
| 10/01/2008 | CN201125686Y Water injection well anti-theft well head well washing apparatus |
| 10/01/2008 | CN201125685Y Oil water transfer control device |
| 10/01/2008 | CN101275458A Reverse circulation construction technique and apparatus of single rope impact drill |
| 09/30/2008 | US7428927 Cement float and method for drilling and casing a wellbore with a pump down cement float |
| 09/30/2008 | US7428922 Valve and position control using magnetorheological fluids |
| 09/30/2008 | US7428921 Well treatment system and method |
| 09/30/2008 | CA2237599C Invert emulsion fluids suitable for drilling |
| 09/26/2008 | CA2627390A1 Drilling, completing and stimulating a hydrocarbon production well |
| 09/25/2008 | WO2008115866A2 Completion method for well cleanup and zone isolation |
| 09/25/2008 | WO2008113844A1 Distance holder with helical slot |
| 09/25/2008 | WO2008095061A3 Use of cuttings tanks for recycling oil based mud and water |
| 09/25/2008 | WO2008095039A3 Cuttings processing system |
| 09/25/2008 | WO2008095036A3 Use of cuttings tank for in-transit slurrification |
| 09/25/2008 | WO2008089200A3 Multiple dart drop circulating tool |
| 09/25/2008 | US20080230228 System and Method For Well Intervention |
| 09/25/2008 | US20080230224 Spear Type Blow Out Preventer |
| 09/25/2008 | US20080230222 Apparatus and a Method of Fragmenting Hard Particles |
| 09/25/2008 | CA2680454A1 Distance holder with helical slot |
| 09/24/2008 | EP1971636A1 Water absorbing polymers for treatment of brines and water-based drilling fluids |
| 09/24/2008 | CN201121496Y Slurry splitter |
| 09/24/2008 | CN101273184A Apparatus and a method of fragmenting hard particles |
| 09/24/2008 | CN101270633A Constant-pressure injection pile-up valve for down-hole non-block production |
| 09/23/2008 | CA2399086C Method and arrangement for reducing dust-related problems in rock drilling |
| 09/18/2008 | WO2008112493A1 Method and apparatus for electrophoretic separation of solids and water from oil based mud |
| 09/18/2008 | WO2008095029A9 Use of cuttings tank for slurrification on drilling rig |
| 09/18/2008 | US20080227666 fluid stream of used fracturing fluid containing contaminants and forms a reconditioned fluid stream. Contaminants are removed by the combination of distillation, electrostatic agglomeration, decanting, and filtration or by distillation and optional filtering. |
| 09/18/2008 | US20080223760 Sieve Apparatus and Method For Use of Same |
| 09/18/2008 | US20080223618 Upright tank jet system |
| 09/18/2008 | US20080223572 Method for drilling and casing a wellbore with a pump down cement float |
| 09/17/2008 | EP1970526A2 Top Drive Casing System |
| 09/17/2008 | EP1969204A2 Method for determining formation fluid entry into or drilling fluid loss from a borehole using a dynamic annular pressure control system |
| 09/17/2008 | CN201116455Y Drilling fluid vibrating screen flexible anti-splash device |
| 09/17/2008 | CN201116454Y Multifunctional well-washing device |
| 09/17/2008 | CN101268249A Triple valve blow out preventer |
| 09/17/2008 | CN101265788A Y tube anti-pollution method and its apparatus |
| 09/17/2008 | CN101265786A Highly effective highly safe cuttings carrying tool |
| 09/17/2008 | CN100419206C Centrifugal drill cuttings drying apparatus |
| 09/16/2008 | CA2625931A1 Upright tank jet system |
| 09/16/2008 | CA2552031C Mill and pump-off sub |
| 09/13/2008 | CA2624737A1 Low toxicity shale hydration inhibition agent and method of use |
| 09/12/2008 | WO2008109304A1 Heavy oil drilling and recovery |
| 09/12/2008 | WO2008107628A1 A valve |
| 09/12/2008 | WO2008107142A1 Drilling method and apparatus |
| 09/12/2008 | WO2008106786A1 Drilling fluid and method for drilling in coal-containing formations |
| 09/12/2008 | CA2679922A1 Drilling fluid and method for drilling in coal-containing formations |
| 09/12/2008 | CA2677926A1 A valve |
| 09/11/2008 | US20080217065 Method and apparatus for electrophoretic separation of solids and water from oil based mud |
| 09/11/2008 | US20080217064 Drilling fluid and methods |
| 09/11/2008 | US20080217019 Coiled tubing wellbore cleanout |
| 09/11/2008 | US20080217018 Method for pickling a work string using dispersed solvent-in-acid fluid design |
| 09/11/2008 | US20080217017 Method of treating well with foamed composition |
| 09/10/2008 | CN201111541Y Vibration sieve for treating drilling fluid |
| 09/10/2008 | CN100417850C Internal blow out preventer ball and seat |
| 09/09/2008 | US7421881 Method and system for degassing a fluid |
| 09/09/2008 | CA2594108A1 Drilling fluid and methods |
| 09/09/2008 | CA2459839C Methods and apparatus for connecting tubulars while drilling |
| 09/09/2008 | CA2359346C Laser-formed screen assembly for use in a vibratory shaker |
| 09/09/2008 | CA2355676C Removal of oil and chloride from oil contaminated material |
| 09/04/2008 | WO2008106544A2 System and method for reservoir characterization using underbalanced drilling data |
| 09/04/2008 | WO2008020908A3 Core annular flow of heavy crude oils in transportation pipelines and production wellbores |
| 09/04/2008 | US20080210471 Rotating control device docking station |
| 09/04/2008 | US20080210470 System and Method for Reservoir Characterization Using Underbalanced Drilling Data |
| 09/04/2008 | DE202008009050U1 Erdbohrvorrichtung Boring apparatus |
| 09/03/2008 | EP1965021A2 A method for collecting geological data |
| 09/03/2008 | EP1963047A1 Water collecting device for core drilling device |
| 09/03/2008 | CN201110142Y New type continuous sand-washing equipment |
| 09/03/2008 | CN101255783A Improved large diameter air reverse circulation drill bit structure |
| 09/03/2008 | CN100416039C Method and device for moving tube in borehole in ground |
| 09/02/2008 | US7419938 Process for treating an oil well |
| 09/02/2008 | US7419223 System and method for enhancing permeability of a subterranean zone at a horizontal well bore |
| 09/02/2008 | US7419014 Fluid jet drilling tool |
| 09/02/2008 | US7419003 Erosion resistant aperture for a downhole valve or ported flow control tool |
| 08/28/2008 | WO2008103642A1 Wellbore monitor |
| 08/28/2008 | US20080202751 Methods and Devices for Forming a Wellbore with Casing |