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)
03/2014
03/05/2014CN203463051U Water cover for boring machine
03/05/2014CN203463050U Three-proofing device in drilling process
03/05/2014CN203463049U Dust-settling device for wind deslagging drilling in underground coal mine
03/05/2014CN203463048U Eccentric crescent sand washing device
03/05/2014CN203463008U Power head structure for horizontal directional drilling machine
03/05/2014CN103615209A Throttling and pressure regulating filter
03/05/2014CN103615208A Liquid inlet mechanism of drilling four-phase separator, and control method thereof
03/05/2014CN103615207A Shaft bottom washing device for coal-bed gas well
03/05/2014CN103615206A Floating ball type continuous loop connection pup joint for drilling
03/05/2014CN103615191A Pumping-pressure reverse-circulation well drilling method and system
03/04/2014US8662170 Cuttings transfer system
03/04/2014US8662163 Rig with clog free high volume drill cutting and waste processing system
02/2014
02/27/2014WO2014031120A1 Latch body components having multiple functions, and drilling head assembly incorporating same
02/27/2014CA2877113A1 Latch body components having multiple functions, and drilling head assembly incorporating same
02/26/2014EP2699975A1 In-line back pressure fluid regulator
02/26/2014CN203452725U Valve element structure applied to casing float shoe
02/26/2014CN203452700U Gas-liquid mixing tool for gas drilling
02/26/2014CN203452699U Multi-effect defoaming device
02/26/2014CN203452698U Large-channel well-flushing diversion switch
02/26/2014CN203452697U Large-channel well flushing shunt switch
02/26/2014CN203452696U Bypass valve for screw drill rod
02/26/2014CN203452695U Oil drill pipe by-pass valve with limiting structure
02/26/2014CN203452694U Mud tank
02/26/2014CN203452693U Environment-friendly gas exhaust device capable of exhausting gas and cyclically injecting water
02/26/2014CN203452692U Wet type dust removal system for coal-mine gas-extraction hole-drilling
02/26/2014CN203452691U Novel mud tank
02/26/2014CN203452690U Absorption well sand washing tool
02/26/2014CN203452644U Well drilling device combining heat energy and mechanical energy
02/26/2014CN103608744A In-line back pressure fluid regulator
02/26/2014CN103603614A Pin snap type automatic grouting float valve
02/26/2014CN103602327A Well cleanout liquid for low-pressure oil-gas bed
02/26/2014CN103602326A Novel efficient well-flushing fluid with reservoir protection function, and preparation method and application thereof
02/26/2014CN101784748B Automated borehole image interpretation
02/25/2014US8657034 Method of drilling a subterranean borehole
02/25/2014US8656991 Clog free high volume drill cutting and waste processing offloading system
02/20/2014WO2014028613A2 Managed pressure drilling system having well control mode
02/20/2014WO2014028321A1 System and method for delivery of oilfield materials
02/20/2014WO2014028319A1 System and method for delivery of oilfield materials
02/20/2014WO2014028317A1 System and method for delivery of oilfield materials
02/20/2014WO2014027317A2 Connecting device between a deviation line of a liquid circulation flow and a radial valve of a drilling string of "a well, interception and deviation system of a liquid circulation flow in a drilling string of a well
02/20/2014US20140051610 Environmentally beneficial recycling of brines in the process of reducing friction resulting from turbulent flow
02/20/2014US20140051607 Particles For Use In Wellbore Fluids
02/20/2014US20140048479 Method for absorbing fluids from drill cuttings
02/20/2014US20140048258 Drilling composition, process for its preparation, and applications thereof
02/19/2014EP2697478A1 Sliding sleeve valve stage cementing tool and method
02/19/2014EP2697473A2 Selectively variable flow restrictor for use in a subterranean well
02/19/2014EP2697472A1 Device for measuring and controlling on-line viscosity at high pressure
02/19/2014CN203441406U Multipurpose box type and expandable installation sledge for equipment
02/19/2014CN203441405U Negative-pressure combined sand cleaning/forced sand dumping device
02/19/2014CN203441354U Portable rock core sampling drill
02/19/2014CN103597164A Wellbore junction completion with fluid loss control
02/19/2014CN103590817A Treatment method for abandoned oil and gas wells in coal mining area
02/19/2014CN103590775A Drill pipe sealing device, mining arrester and mining drilling device
02/19/2014CN103590768A Treatment method for abandoned uncased wells in coal mining area
02/19/2014CN102828712B Double-throttle control slurry pump distributing manifold for applying wellhead back pressure and method
02/19/2014CN102477845B Method for drilling horizontal well with super-short radius
02/19/2014CN102305059B Automatic control system and method of petroleum drilling machine
02/19/2014CN102094586B Application method of ground sand washing device for horizontal well
02/18/2014US8651201 Drill cuttings box combined cuttings feed inlet and air outlet apparatus
02/18/2014CA2602687C Apparatus and method for recovering oil-based drilling mud
02/13/2014WO2014025975A1 Releasable connection for coiled tubing drilling apparatus
02/13/2014WO2014025797A1 Switchable fluid circulation tool
02/13/2014WO2014025645A1 Wellbore servicing system and methods of use
02/13/2014WO2014025567A1 A method and apparatus for drilling and completion fluid separation
02/13/2014WO2013050872A3 System and method for inhibiting an explosive atmosphere in open riser subsea mud return drilling systems
02/13/2014US20140041941 Methods and systems for drilling
02/13/2014US20140041868 Method and apparatus for drilling and completion fluid separation
02/12/2014EP2694773A1 Wellbore pressure control with optimized pressure drilling
02/12/2014EP2694772A1 Automatic standpipe pressure control in drilling
02/12/2014CN203430557U Dust removal device for preventing gas from being ejected out of orifice
02/12/2014CN203430499U Well fracturing parameter intelligent monitoring system
02/12/2014CN203430454U Drainage auxiliary boosting device of kilometer drilling machine
02/12/2014CN203430453U Clear water pressurizer and bored pile foundation secondary hole-cleaning device
02/12/2014CN203430452U Bypass valve with good sealing performance for screw drill rod
02/12/2014CN203430451U Good-protecting-performance bypass valve for screw drill rod
02/12/2014CN203430450U Bypass valve of petroleum drill pipe
02/12/2014CN203430449U Mine air compression negative pressure self-generating orifice dust collection device
02/12/2014CN203430448U Water injection well flushing fluid recycling treatment device
02/12/2014CN203430447U Inner side hole type drill pipe filter
02/12/2014CN203430446U Horizontal well turbine sand cleaning device
02/12/2014CN103573200A Well flushing process and device
02/12/2014CN103573199A On-line measurement device for rhelogical property of drilling fluid
02/12/2014CN103573198A Well tube pressure and flow rate management system and method
02/12/2014CN103567145A Screen plate for petroleum drilling fluid
02/11/2014US8646549 Drilling machine power pack which includes a clutch
02/11/2014CA2649910C Drill string flow control valves and methods
02/11/2014CA2616137C A shoe for wellbore lining tubing
02/06/2014WO2014022691A1 Hot swappable choke actuator system and/or method
02/06/2014WO2014022266A1 Integral multiple stage safety valves
02/06/2014WO2014021889A1 Remote activated deflector
02/06/2014WO2014019154A1 Well flushing valve
02/06/2014US20140034311 Methods and apparatus for wellbore construction and completion
02/05/2014EP2691594A2 Method and device for preventing a mud relief valve from incorrect opening
02/05/2014CN203420655U Hydraulic screen box angle adjusting device
02/05/2014CN203420654U Mechanical screening box angle adjusting device
02/05/2014CN103562487A Wellbore pressure control with optimized pressure drilling
02/05/2014CN103562486A Proppant mixing and metering system
02/05/2014CN103556985A Drill working state automatic identification method suitable for hydraulic drill
02/05/2014CN103556967A 一种废弃钻井液处理装置 A waste drilling fluid processing apparatus
02/05/2014CN103556966A Device for monitoring dynamic hydrogen sulfide removing effect of drilling fluid
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