Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780)
12/2010
12/22/2010CN101922285A Method for safely tripping gas drilling tool in case of encountering air layer
12/21/2010US7854277 Wellbore fluid comprising a base fluid and a particulate bridging agent
12/16/2010WO2010144699A2 Delay activated valve and method
12/16/2010WO2010144593A2 Dual acting rod piston control system
12/16/2010WO2010142370A1 Engineered fibers for well treatments
12/16/2010US20100314174 Flow diverter for drilling
12/16/2010US20100314169 Wideband Mud Pump Noise Cancelation Method for Wellbore Telemetry
12/16/2010CA2762922A1 Engineered fibers for well treatments
12/15/2010EP2261458A1 Engineered fibres for well treatments
12/15/2010EP2261457A2 Method and apparatus for drilling a borehole into a subsea abnormal pore pressure environment
12/15/2010EP2261456A2 Method and apparatus for drilling a borehole into a subsea abnormal pore pressure environment
12/15/2010EP2260174A2 Flow stop valve
12/15/2010CN201671577U Well flushing quality monitoring device
12/15/2010CN201671538U Anchor drill
12/15/2010CN1769644B Kick warning system using high frequency fluid mode in a borehole
12/15/2010CN101915068A Method for treating cementing slurry cleaning liquid
12/15/2010CN101328709B Borehole cleaning method and apparatus for fast reverse circulation by using high pressure air
12/14/2010US7849935 System and method for drilling wellbores
12/14/2010CA2614115C Filter screen with molded end cap for oilfield screens
12/09/2010WO2010141343A1 Continuous fluid circulation valve for well drilling
12/09/2010WO2010139938A2 Proppant addition method and system
12/09/2010WO2010139418A1 Metering device and process for introducing a pulverulent medium into a liquid
12/09/2010WO2009139825A8 An arrangement and a method for monitoring an air flow in a drill rig
12/09/2010WO2009132831A3 Grip head for an earth boring unit
12/09/2010US20100307834 Vessel to Condition Dry Drill Cuttings
12/09/2010US20100307830 Method and system for particle jet boring
12/09/2010US20100307769 Fluid control modules for use with downhole tools
12/09/2010CA2764318A1 Methods and compositions for viscosifying heavy aqueous brines
12/09/2010CA2764300A1 Continuous fluid circulation valve for well drilling
12/08/2010CN201666136U Communicating pipe device
12/08/2010CN201666135U Clean water tank of solid control system
12/08/2010CN201666134U Novel slurry umbrella
12/08/2010CN101906952A Auxiliary circulatory chip returning device of production vertical well when the coalbed methane well generates radial hydraulically injection
12/08/2010CN101144369B Electric percussion drilling device based on pore bottom turbo-generator unit power supply
12/07/2010USRE41979 Flow control apparatus and method
12/07/2010US7845432 Microtunnelling system and apparatus
12/07/2010US7845410 Openhole perforating
12/07/2010US7845408 Top drive swivel apparatus and method
12/05/2010CA2687910A1 Environmentally favorable aqueous solution for controlling bacteria in the water used for fracturing
12/03/2010CA2704528A1 Vessel to condition dry drill cuttings
12/02/2010WO2010136746A1 Real time pump monitoring
12/02/2010WO2010115834A3 Apparatus for and method of drilling a subterranean borehole
12/02/2010CA2759316A1 Method and system for transferring signals through a drill pipe system
12/01/2010EP2256290A1 Casing shoes and methods of reverse-circulation cementing of casing
12/01/2010EP2256287A1 Casing shoes and methods of reverse-circulation cementing of casing
12/01/2010EP2256285A2 Bearing arrangement for a drilling assembly
12/01/2010EP2255059A1 Hydraulic connector apparatuses and methods of use with downhole tubulars
12/01/2010EP2126271B1 Improved shoe for wellbore lining tubing
12/01/2010CN201661258U Down-hole drill dust removing device
12/01/2010CN201661257U Oily drilling cuttings movable disposal module
12/01/2010CN201661256U Novel vibrating sieve for sieving drilling fluid
12/01/2010CN201661255U Device for rock debris annulus re-injection
12/01/2010CN201661254U Environmental-friendly dust connecting device
12/01/2010CN101899969A Real-time on-site drilling full parameter optimization method
12/01/2010CN101899967A Well completion technology for increasing water yield in poor aquifer
12/01/2010CN101343984B Cement pipe assembly used for ocean drill platform
11/2010
11/30/2010US7842651 Silicate drilling fluid composition containing lubricating agents and uses thereof
11/30/2010US7842650 foamer selected from sulfates, sulfonates, phosphates, carboxylates, sulfosuccinates, betaines, quaternary ammonium salts, amine oxides, amine ethoxylates, amide ethoxylates, acid ethoxylates, alkyl glucosides, EO-PO block copolymers, and long-chain fatty alcohol ethoxylates, and cosurfactant
11/30/2010CA2618134C Triple valve blow out preventer
11/25/2010WO2010132980A1 Bitumen anti-accretion additive
11/25/2010WO2010089725A3 System and method for well clean-up
11/25/2010WO2010088681A3 System and method of monitoring flow in a wellbore
11/25/2010US20100294569 Methods for cuttings for a wireline drilling tool
11/24/2010EP2032794B1 Top filling tubing
11/24/2010CN201650254U Construction pipe string integrating fracturing and recovery of hydraulic pump
11/24/2010CN201650172U Front flushing fluid evaluator for well cementation
11/24/2010CN201650171U Drilling fluid diverter of vibrating screen
11/24/2010CN201650170U Anti-returning check valve
11/24/2010CN201650169U Rod pumping well mouth back pressure reducing device
11/24/2010CN201650168U Gas trap of pneumatic drill
11/24/2010CN201650167U Tail pressurizer for sand wash
11/24/2010CN1871408B Nozzle unit and method for excavating a hole in an object
11/24/2010CN101896686A Rock drilling rig and method for drilling
11/23/2010US7837849 Electrical treatment for oil based drilling or completion fluids
11/23/2010US7836977 Method of drilling a well at or under balance using a electrical submersible pump
11/23/2010US7836973 Annulus pressure control drilling systems and methods
11/23/2010CA2655469C Downhole ball dropping apparatus
11/23/2010CA2601283C System and method for real-time management of formation fluid sampling with a guarded probe
11/18/2010WO2010069992A4 Riser valve
11/18/2010US20100288501 Electric submersible pumping system for dewatering gas wells
11/17/2010EP2251524A1 Wellbore treatment
11/17/2010EP2251395A1 Methods for increase gas production and load recovery
11/17/2010CN201635683U Gas drilling dust falling device
11/17/2010CN201635682U Multi-stage circulation head
11/16/2010US7833946 Water-based drilling fluid
11/16/2010CA2447009C Process and arrangement for separating oil from oil containing materials
11/16/2010CA2327373C Method and system for calculating pressure losses taking thermal effects into account
11/11/2010WO2010129888A2 Dual action jet bushing
11/11/2010WO2010129132A2 Portable polymer hydration-conditioning system
11/11/2010WO2010128292A2 Downhole material delivery
11/11/2010WO2010128291A2 Downhole tool
11/11/2010WO2010128287A2 Downhole tool
11/11/2010CA2761004A1 Downhole material delivery
11/11/2010CA2761002A1 Downhole tool
11/11/2010CA2760950A1 Dual action jet bushing
11/11/2010CA2760832A1 Downhole tool
11/10/2010CN201627549U Buffering device of slurry recycling pipeline
11/10/2010CN101053870B Waste solidified treatment device for drilling
11/09/2010US7828084 Use of cuttings tank for slurrification on drilling rig
11/09/2010US7828083 Method of controlling operation of rock drilling rig, and rock drilling rig
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