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)
11/2012
11/08/2012US20120279932 System and method for drying drill cuttings
11/07/2012CN202520256U Swirling type drilling fluid adjusting and weighting device
11/07/2012CN202520255U Vibrating screen for drilling fluid
11/07/2012CN202520254U Cleaning device for mud cake on inner wall of drill rod
11/07/2012CN102770620A Apparatuses and methods of manufacturing oilfield machines
11/07/2012CN102767342A Sand washing valve
11/07/2012CN102296932B Floor type indoor ceiling concrete slab bottom drilling mechanism
11/07/2012CN101151082B Vibratory separator and method for separating solids from a solids laden drilling fluid
11/01/2012WO2012149345A2 Drilling waste treatment
11/01/2012WO2012149007A2 Functionally gradient composite article
11/01/2012WO2012149004A2 Method of making and using a functionally gradient composite tool
11/01/2012WO2012148578A2 Centrifugal subterranean debris collector
11/01/2012WO2012001402A3 Oilfield equipment and related apparatus and method
11/01/2012US20120273403 Reclaimer system
11/01/2012US20120273278 Centrifugal Subterranean Debris Collector
11/01/2012US20120273271 Measurement-while-drilling mud pulser and method for controlling same
11/01/2012CA2834568A1 Drilling waste treatment
11/01/2012CA2834360A1 Annular relief valve
11/01/2012CA2834227A1 Collapse sensing check valve
11/01/2012CA2833981A1 Functionally gradient composite article
11/01/2012CA2833958A1 Method of making and using a functionally gradient composite tool
10/2012
10/31/2012EP2518259A2 Instrumented internal blowout preventer valve for measuring drill string drilling parameters
10/31/2012EP2516793A1 Downhole tool for borehole cleaning or for moving fluid in a borehole
10/31/2012EP2516787A1 Method of drilling and jet drilling system
10/31/2012EP2516786A1 Method of drilling and abrasive jet drilling assembly
10/31/2012CN202510069U Gas-liquid phase dedusting device for operation of downhole drilling machine of coal mine
10/31/2012CN202510068U Pressure test well washing device of screw pump
10/31/2012CN202510067U Combination device of air supported head and air guide box
10/31/2012CN102061933B Long drilling positioning construction process
10/30/2012US8297377 Method and system for accessing subterranean deposits from the surface and tools therefor
10/30/2012US8297355 Using heat from produced fluids of oil and gas operations to produce energy
10/30/2012CA2688745C Thermothickener polymer and surfactant composition and methods of employing the composition
10/30/2012CA2664459C Injection molded grid for saving screen frames
10/30/2012CA2510214C Flow-biased sequencing valve
10/26/2012WO2012145128A1 In-line back pressure fluid regulator
10/26/2012WO2012142891A1 Method and system for improving drilling speed by using drill string vibration
10/26/2012WO2012032485A3 Shank adapter with corrosion protection
10/26/2012CA2833625A1 In-line back pressure fluid regulator
10/26/2012CA2816465A1 Method and system for improving drilling speed by using drill string vibration
10/24/2012EP2513411A2 Equipment for quick dispersion of polyacrylamide powder for fracturing operations
10/24/2012EP2512615A2 Method and apparatus for handling drilling mud containing an oil/water emulsion
10/24/2012CN202500512U Drilling fluid filtering device arranged at drilling fluid inlet end of water faucet of top driving drilling machine
10/24/2012CN202499794U Curing treatment device for waste drilling fluid
10/24/2012CN202497775U Well washing liquid storage tank with three-level filtering for downhole operation
10/24/2012CN102753784A Method and apparatus for autonomous downhole fluid selection with pathway dependent resistance system
10/24/2012CN102747970A Automatic control system of filling valve of marine drilling riser
10/24/2012CN102747969A Dustproof device and well drilling machine with dustproof device
10/23/2012US8291974 Method and system for accessing subterranean deposits from the surface and tools therefor
10/23/2012CA2727093C Low conductivity water based wellbore fluid
10/23/2012CA2691918C Method and apparatus for centrifugal separation
10/23/2012CA2681573C Cuttings treatment and reuse
10/21/2012CA2770763A1 Process of sealing a breakthrough created during the production of hydrocarbons in a subterranean formation
10/18/2012WO2012142112A1 Sliding sleeve valve stage cementing tool and method
10/18/2012WO2012141880A2 Selectively variable flow restrictor for use in a subterranean well
10/18/2012WO2012140092A1 Device for measuring and controlling on-line viscosity at high pressure
10/18/2012WO2012115749A3 Remotely operated production valve and method
10/18/2012WO2011149806A8 Method for circulating a fluid entry entry out of a subsurface wellbore without shutting in the wellbore
10/18/2012CA2832071A1 Sliding sleeve valve stage cementing tool and method
10/18/2012CA2832003A1 Circulation and rotation tool
10/18/2012CA2831862A1 Device for measuring and controlling on-line viscosity at high pressure
10/18/2012CA2831093A1 Selectively variable flow restrictor for use in a subterranean well
10/17/2012CN202493232U Drilling pressure control device
10/17/2012CN202493231U Drill hole slurry separating device
10/17/2012CN102003140B Traversing reverse circulating drilling method of horizontal directional drilling pipeline and special drilling bit
10/16/2012CA2669497C Electromagnetic treatment of contaminated materials
10/11/2012WO2012138446A1 Annular circulation valve and methods of using same
10/11/2012WO2012138353A1 Wellbore pressure control with optimized pressure drilling
10/11/2012WO2012138349A1 Automatic standpipe pressure control in drilling
10/11/2012WO2012106350A3 Segmented collapsible ball seat allowing ball recovery
10/11/2012WO2012088132A3 Surface signal for flow blockage for a subterranean debris collection apparatus
10/11/2012WO2012054324A3 Remotely controllable fluid flow control assembly
10/11/2012US20120255777 Wellbore pressure control with optimized pressure drilling
10/11/2012US20120255776 Automatic standpipe pressure control in drilling
10/11/2012CA2832212A1 Drilling motor valve and method of using same
10/11/2012CA2831039A1 Wellbore pressure control with optimized pressure drilling
10/11/2012CA2827935A1 Automatic standpipe pressure control in drilling
10/10/2012EP2506977A1 Cuttings wash apparatus and method
10/10/2012CN202483488U Hydraulic fan dust collector
10/10/2012CN202483487U Dust filtering device for drilling fluid
10/10/2012CN202483486U Pneumatic slurry telescopic outlet pipe
10/10/2012CN202483462U Self-filtration drill bit with diamond composite lengthened nozzle
10/10/2012CN202483433U High-wind-pressure impacter
10/10/2012CN102725573A Subsea valve actuator having visual manual position indicator connected to a manual override shaft
10/10/2012CN102725476A Pumping mud by electrohydrodynamic propulsion
10/10/2012CN102720461A Grout stopping method and grout stopping device for hydraulic drill jumbo
10/10/2012CN102720453A Method and device for mechanically removing sand and draining liquid from pit shaft of oil/gas well in underbalanced state
10/10/2012CN102720452A Watering valve
10/10/2012CN101525993B Method for monitoring and controlling hydrogen sulfide in sulfur-containing stratum underbalanced drilling
10/10/2012CN101444910B Dust suction device for hand-held power tool
10/09/2012US8281859 Methods and compositions comprising cement kiln dust having an altered particle size
10/09/2012CA2629177C Foamed fluid additive for underbalance drilling
10/09/2012CA2571358C Entrainment fluid channeling device for a down-hole drill string
10/08/2012CA2772148A1 Produced fluid heating and separation
10/04/2012WO2012131146A1 Method for cleaning drilling fluid in rock sampling drilling and a cleaning unit
10/04/2012US20120247831 Control method and apparatus for well operations
10/04/2012DE112010003521T5 Bohrmeißel Drill bit
10/04/2012CA2830832A1 Method for cleaning drilling fluid in rock sampling drilling and a cleaning unit
10/04/2012CA2829779A1 Method and device for preventing a mud relief valve from incorrect opening
10/03/2012CN202467893U Gas, water, slag separation integrated apparatus
10/03/2012CN202467727U Self-lubrication and dust-accumulation device of down-hole drilling machine
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