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)
09/2012
09/04/2012US8257585 Debris catcher with retention within screen
09/04/2012US8256538 Containment system for oil field riser pipes
09/04/2012US8256532 System, program products, and methods for controlling drilling fluid parameters
09/04/2012CA2711515C Viscoelastic surfactant based wellbore fluids and methods of use
08/2012
08/30/2012WO2012115749A2 Remotely operated production valve and method
08/29/2012EP2491287A1 Subsea valve actuator having visual manual position indicator connected to a manual override shaft
08/29/2012CN202401995U Foam generator
08/29/2012CN202401994U Underbalance drilling well casing bypass valve
08/29/2012CN202401993U Dedusting, screen-out and recovery device for gas
08/29/2012CN102650200A Shot-free unidirectional blocking valve
08/29/2012CN102650199A Bidirectional pressure control circulating valve
08/29/2012CN102650198A Drilling cuttings collector
08/29/2012CN101672169B Treatment method of wax-emulsion drilling fluid
08/29/2012CN101514611B Two-way rotating fluid guiding device
08/29/2012CN101235705B All-cover type skid-mounted film separation and nitrogen-making device
08/28/2012US8252728 Drilling fluids comprising hydroxylated polymers
08/28/2012US8251144 Flow diverter
08/28/2012CA2676880C High density slurry
08/28/2012CA2540880C A method and device for controlling drilling fluid pressure
08/23/2012WO2012112154A1 Methods and systems of collecting and analyzing drilling fluids in conjuction with drilling operations
08/23/2012WO2012109759A1 Low headroom confined space geoexchange drilling system and method
08/23/2012US20120211281 Low headroom confined space geoexchange drilling system and method
08/22/2012CN202391365U Vibration excitation device for drilling fluid vibrating screen
08/22/2012CN202391364U Sand-carrying jet device
08/22/2012CN202391363U Large-displacement well washing and wax removal device
08/22/2012CN202391338U Device for quickly punching ceiling
08/22/2012CN102648330A Method for hydrocarbon removal and recovery from drill cuttings
08/21/2012CA2703437C Aggregating compositions, modified particulate metal-oxides, modified formation surfaces, and methods for making and using same
08/21/2012CA2641618C Top drive for casing connection
08/21/2012CA2560333C Spear type blow out preventer
08/21/2012CA2509535C Percussive tool with flushing head
08/17/2012CA2854414A1 Low headroom confined space geoexchange drilling system and method
08/17/2012CA2738506A1 Low headroom confined space geoexchange drilling system and method
08/17/2012CA2736199A1 Pulse generator
08/16/2012WO2012071194A3 Eccentric safety valve
08/16/2012WO2012047689A3 Apparatus and system for processing solids in subsea drilling or excavation
08/15/2012EP2487217A1 Treatment for recycling fracture water - gas and oil recovery in shale deposits
08/15/2012EP2486229A2 Apparatuses and methods of manufacturing oilfield machines
08/15/2012EP2486224A2 Method for hydrocarbon removal and recovery from drill cuttings
08/15/2012EP2132279B1 Drilling fluid and method for drilling in coal-containing formations
08/15/2012CN202381012U Washover inversely-buckled salvage cylinder
08/15/2012CN202381011U Integrated multipurpose drift size gauge tool
08/15/2012CN202381001U Return pressure compensating device for pressure-control well drilling
08/15/2012CN202381000U Metering tank for trial repair
08/15/2012CN202380999U Double-pump structure of metering tank for test repairing
08/15/2012CN102635321A High-precision overflow monitoring method during well-drilling process
08/14/2012US8240400 Noise-dampening shield structure for rock drilling apparatus
08/14/2012US8240398 Annulus pressure setpoint correction using real time pressure while drilling measurements
08/14/2012US8240397 Method to control bit load
08/14/2012CA2637304C Coiled tubing wellbore cleanout
08/14/2012CA2539668C Steerable drilling system
08/09/2012WO2012106350A2 Segmented collapsible ball seat allowing ball recovery
08/09/2012WO2012037301A3 Return fluid separator
08/09/2012CA2824767A1 Segmented collapsible ball seat allowing ball recovery
08/08/2012EP2484863A2 Novel activating mechanism for controlling the operation of a downhole tool
08/08/2012EP2483515A1 An apparatus and method for containing fluid or gas released from a pipe
08/08/2012CN202370463U Pressure control throttling pipe manifold
08/08/2012CN202370462U Telescopic mud barrel
08/08/2012CN202370461U Nib flush head for coiled tubing
08/08/2012CN202370460U Cleaning device for drill holes
08/08/2012CN102627577A Emulaifier based on polyamines and fatty acid/maleic anhydride
08/08/2012CN101166886B Stimulation tool having a sealed ignition system
08/07/2012US8235123 Separating device
08/07/2012US8235120 Mesophase fluids with extended chain surfactants for downhole treatments
08/07/2012US8235119 Drilling fluid and method for reducing lost circulation
08/07/2012CA2674434C Apparatus and methods for utilizing a downhole deployment valve
08/07/2012CA2544405C System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud
08/02/2012WO2012102694A1 Wellbore knock-out chamber and related methods of use
08/02/2012WO2012100283A1 In situ sampling and analysis system for a drill rig and a drill rig incorporating same
08/02/2012US20120193146 Vacuum Assisted Drill Cuttings Dryer and Handling Apparatus
08/02/2012CA2825582A1 Check valve
08/02/2012CA2824716A1 Screen assembly and a method for making same
08/02/2012CA2824297A1 In situ sampling and analysis system for a drill rig and a drill rig incorporating same
08/01/2012EP2481881A2 Vacuum assisted drill cuttings dryer and handling apparatus
08/01/2012EP2480749A1 Control method and apparatus for well operations
08/01/2012EP2480748A2 Multiple process service vessel
08/01/2012EP2480624A2 Foamers for downhole injection
08/01/2012EP1488073B2 Dynamic annular pressure control apparatus and method
08/01/2012CN202360052U Pressurized shaft bottom switch
08/01/2012CN202360051U Safe bidirectional well washing valve
08/01/2012CN202360050U Umbrella-shaped soot sheltering device for engineering machines
08/01/2012CN102619553A Spiral catcher
08/01/2012CN102619480A Drill hole air humidification dust remover
08/01/2012CN102619479A Underwater environment-friendly construction technology for large cast-in-situ bored pile
08/01/2012CN102618227A Oil-based drilling fluid system for use in continental facies shale gas horizontal well
08/01/2012CN102618225A Well repairing fluid
07/2012
07/31/2012US8230933 Top drive casing system
07/26/2012WO2012100259A2 Telemetry operated circulation sub
07/26/2012US20120186881 Drilling fluid recovery when drilling under an obstacle or water body
07/26/2012US20120186873 Well drilling method utilizing real time response to ahead of bit measurements
07/26/2012CA2824522A1 Telemetry operated circulation sub
07/25/2012EP2478179A1 Method of drilling a subterranean borehole
07/25/2012CN202348213U Underground drill-rod-outside blow-out preventer
07/25/2012CN202348211U Complete equipment for preventing gas emission from drill hole
07/25/2012CN202348186U Dust fall device of drilling rig and drilling rig provided with dust fall device
07/25/2012CN202348185U Self-contained local circulation system
07/25/2012CN202348184U Double-wall double-channel single-sealing cock valve
07/25/2012CN202348183U Testing system for technology for controlling pitshaft pressure
07/25/2012CN202348182U Simple mud-sediment separator for reverse circulation drill rig
07/25/2012CN202348181U Gas-proof nozzle orifice water-coal-gas separator
1 ... 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 ... 138