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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07/29/2010 | WO2010065646A3 Method for determining formation integrity and optimum drilling parameters during drilling |
07/29/2010 | US20100186946 Bearing assembly retaining apparatus and well drilling equipment comprising same |
07/29/2010 | CA2737279A1 Method and apparatus for down-the-hole drilling |
07/28/2010 | EP2209566A2 Screen clamp |
07/28/2010 | CN201535142U 一种钻孔内灭尘排渣装置 Slagging off the dust within a drilling unit |
07/27/2010 | US7762357 Dual gradient drilling method and apparatus with an adjustable centrifuge |
07/27/2010 | CA2630020C Apparatus and method for cleaning out sand from an underbalanced hydrocarbon producing well |
07/27/2010 | CA2516277C Dynamic annular pressure control apparatus and method |
07/27/2010 | CA2508254C Reverse circulation clean out system for low pressure gas wells |
07/22/2010 | WO2010082165A1 Using a biphasic solution as a recyclable coiled tubing cleanout fluid |
07/22/2010 | WO2010065311A3 Tubing weight operation for a downhole tool |
07/22/2010 | WO2010053904A3 Non-aqueous breaker fluids and methods of use thereof |
07/21/2010 | CN201531247U Anti-spit back screw drilling tool bypass valve |
07/21/2010 | CN201531233U Automatic sand washing device for oil gauge separator |
07/21/2010 | CN201531232U Double-purpose water tap for petroleum drilling machine |
07/21/2010 | CN201531231U Multiparameter well-flushing tester |
07/21/2010 | CN201531230U Double liquid pool balanced elliptical drilling fluid vibrating screen |
07/21/2010 | CN201529618U Single staggered screen box of a vibrating screen |
07/21/2010 | CN101784748A Automated borehole image interpretation |
07/21/2010 | CN101780454A Bonding and preparation method of plate-type wave-shaped screen |
07/20/2010 | US7757771 Wellhead seal unit |
07/20/2010 | US7757766 Treating a well bore penetrating a subterranean formation comprising combining components water and a density-matched suspension to prepare a treatment fluid; the density-matched suspension comprises a suspending liquid and a solid particle suspended in the suspending liquid; nonsettling |
07/20/2010 | US7757764 Method for drilling and casing a wellbore with a pump down cement float |
07/20/2010 | CA2624328C Shale shaker |
07/20/2010 | CA2622889C Apparatus and method for conveying drill cuttings |
07/20/2010 | CA2477102C Drill cutting treatment method and apparatus |
07/15/2010 | WO2010080867A2 Oilfield reclamation system |
07/14/2010 | EP2205817A2 Anchored riserless mud return systems |
07/14/2010 | CN201526452U Underground annulus suction screw pump |
07/14/2010 | CN201526292U Slurry medicine stirring device for well |
07/14/2010 | CA2649689A1 Drilling fluid for enhanced rate of penetration |
07/13/2010 | CA2596282C Wellbore circulation system |
07/13/2010 | CA2419650C System for performing wellbore operations |
07/08/2010 | WO2010045090A3 Treatment of recovered wellbore fluids |
07/08/2010 | WO2010030644A3 System and method for de-watering waste drilling fluids |
07/07/2010 | CN201521269U Valve assembly of sleeve grouting circulation unfreezing device |
07/07/2010 | CN201521247U Grouting drill bit with check valve |
07/07/2010 | CN101769133A Drilling and grinding tubular column structure of drilling tool |
07/07/2010 | CN101769132A Dust hood for drilling machine |
07/07/2010 | CA2689719A1 Sand screw dryer |
07/06/2010 | US7749942 Variable density fluids and methods of use in subterranean formations |
07/06/2010 | US7748462 Actuating mechanism |
07/06/2010 | US7748460 Method and apparatus for wellbore fluid treatment |
07/06/2010 | CA2596318C Drilling and lining method using a spoolable tubing |
07/06/2010 | CA2502698C Drill head steering |
07/01/2010 | WO2010030274A3 Invert emulsion wellbore fluids and method for reducing toxicity thereof |
07/01/2010 | US20100163309 Sub-Surface Deployment Valve |
07/01/2010 | US20100163307 Drill Bits With a Fluid Cushion For Reduced Friction and Methods of Making and Using Same |
06/30/2010 | EP2201210A1 Variable position gas trap |
06/30/2010 | EP1928769B1 Apparatus and method for conveying drill cuttings |
06/30/2010 | CN201517382U Enclosed vibratory screen for well drilling of petroleum |
06/30/2010 | CN201517381U Hydraulic rotary tool |
06/30/2010 | CN101761485A Righting type downhole annular suction turbopump |
06/30/2010 | CN101757874A Viscoelastic surfactant fluids and related methods of use |
06/29/2010 | US7743829 Cement flow control tool |
06/24/2010 | WO2010070190A1 Method and apparatus for down-the-hole drilling |
06/24/2010 | WO2010069992A2 Riser valve |
06/24/2010 | WO2010051208A3 Reduced waste cleaning methods for oil well related systems |
06/24/2010 | WO2010046653A3 Drill pipe |
06/24/2010 | WO2010031804A3 Polymer gels as flow improvers in water injection systems |
06/24/2010 | WO2010020698A3 Equipment for quick dispersion of polyacrylamide powder for fracturing operations |
06/24/2010 | US20100155067 Systems and methods for using a passageway through subterranean strata |
06/24/2010 | CA2688765A1 Continuous fluid circulation valve for well drilling |
06/23/2010 | EP2198115A1 Method of using pressure signatures to predict injection well anomalies |
06/23/2010 | CN201513157U Inverse well-flushing double seal check valve |
06/23/2010 | CN201513147U Slurry circulating device |
06/23/2010 | CN201513146U Solar-powered integrated remote measuring and monitoring system |
06/23/2010 | CN201513145U Adjustable pressure-limiting flow dividing device |
06/23/2010 | CN201513144U Downhole reverse-circulation sand flusher for horizontal wells |
06/23/2010 | CN201513143U Submersible faucet |
06/23/2010 | CN201513131U Tubular column for drilling plugs in well repairing |
06/23/2010 | CN101755105A Treatment and reuse of oilfield produced water |
06/23/2010 | CN101748990A Releasing packer well-washing device |
06/23/2010 | CN101748980A Cyclone separator set for separating and purifying cutting-carrying gas generated by gas drilling |
06/23/2010 | CN101748979A Ground separating unit of gas drilling system |
06/22/2010 | US7741249 Geosynthetic composite for borehole strengthening |
06/22/2010 | US7741247 Methods and compositions for sealing fractures, voids, and pores of subterranean rock formations |
06/22/2010 | US7740073 Wellhead seal unit |
06/22/2010 | CA2603751C Invert emulsion based completion and displacement fluid and method of use |
06/17/2010 | WO2010068347A2 Subsea solids processing apparatuses and methods |
06/17/2010 | US20100147593 Subsea Solids Processing Apparatuses and Methods |
06/17/2010 | US20100147534 Apparatus and method for facilitating the connection of tubulars using a top drive |
06/17/2010 | US20100147532 Remote operated actuator system for drill string internal blowout preventer |
06/16/2010 | EP2196516A1 Lost circulation material for drilling fluids |
06/16/2010 | CN201507276U Sand prevention valve for controlling washing of well |
06/16/2010 | CN201507256U Automatic filtration and back-flushing system for high-pressure water injection wells |
06/16/2010 | CN201507240U Anti-blocking hollow rotor of screw drill |
06/16/2010 | CN1826454B Downhole hammer drill |
06/16/2010 | CN101737018A Real-time monitoring method and device of underbalanced drilling well bottom pressure |
06/16/2010 | CN101737017A Multiple-anticorrosion anchor rod |
06/15/2010 | US7736521 Circulating completion, workover and drilling fluids used in hydrocarbon oil recovery monitored by a viscometer generating a signal and divertingthe flow if the fluid viscosity is too high or too low for filtration by diatomaceous earth filter; viscosity is adjusted accordingly for reuse |
06/15/2010 | US7735582 Insertable devices for retention systems, structures for attachment and methods of use |
06/15/2010 | CA2447556C Propellant treatment and continuous foam removal of well debris |
06/10/2010 | WO2010065646A2 Method for determining formation integrity and optimum drilling parameters during drilling |
06/10/2010 | WO2010065311A2 Tubing weight operation for a downhole tool |
06/10/2010 | WO2010064009A1 Methods and systems for characterizing lcm particle plugging and rheology in real time |
06/10/2010 | US20100139986 Agitator for a Drill and Related Methods |
06/10/2010 | CA2806479A1 Methods and systems for characterizing lcm particle plugging and rheology in real time |
06/09/2010 | CN201502730U Cock-type mud valve |
06/09/2010 | CN101725328A Initial storage type nitrogen circulating drilling system |