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)
03/2012
03/14/2012CN202165010U 一种煤矿钻机 One kind of mine rig
03/14/2012CN102378847A Drill pipe connector
03/14/2012CN102373880A Power water tap
03/13/2012US8132632 Method for recovering valuable drilling mud materials using a binary fluid
03/13/2012US8132630 Reverse circulation pressure control method and system
03/13/2012CA2757800A1 Mobile water treatment for an oil or gas well
03/13/2012CA2626927C Apparatus and method for separating solids from a solids laden fluid
03/13/2012CA2550382C Recycling hydrocarbon hydraulic stimulation fluid
03/08/2012WO2012030427A1 Method to treat produced waters from thermally induced heavy crude oil production (tar sands)
03/08/2012WO2012028949A2 Dual activity drilling ship
03/08/2012WO2011146549A3 Method for drilling through nuisance hydrocarbon formations
03/08/2012CA2810142A1 Dual activity drilling ship
03/07/2012EP2425092A2 Drill string flow control valves and methods
03/07/2012CN202157795U Pressure compensation device for pressure control drilling system
03/07/2012CN202157785U 用于牙轮钻机的防冻注水管 Note antifreeze for rotary drill pipe
03/07/2012CN202157783U 沉砂式底球 Grit Bottom Ball
03/07/2012CN202157771U 一种现场液氮汽化低密度泡沫洗井系统 A field low-density foam vaporization of liquid nitrogen flushing system
03/07/2012CN202157770U 用于控压钻井系统的压力补偿装置 Pressure compensation device for MPD system
03/07/2012CN202157769U 一种钻井液密度加压在线测量装置 One kind of pressurized fluid density measurement devices online
03/07/2012CN202157768U 计量站回水过滤装置 Metering station backwater filtration device
03/07/2012CN202157767U 单电动机驱动钻井液离心机 Single motor drive drilling fluid centrifuge
03/07/2012CN202157766U 水平井涡轮清砂装置 Sand horizontal wells turbine unit
03/07/2012CN102369337A Adjustable flow control devices for use in hydrocarbon production
03/07/2012CN101397894B Well drilling gas injection joint and use method thereof
03/06/2012US8127868 Apparatus and methods for drilling a wellbore using casing
03/06/2012US8127867 Method and system for surface filtering of solids from return fluids in well operations
03/06/2012US8127866 Air injection collar
03/06/2012US8127851 Mill and method for drilling composite bridge plugs
03/06/2012US8127844 Method for oilfield material delivery
03/06/2012US8127835 Integrated cable hanger pick-up system
03/01/2012WO2012027578A1 Compact, skid mounted cuttings and fluids processing and handling system
03/01/2012WO2012027276A2 Pump through circulating and or safety circulating valve
03/01/2012WO2012027245A1 System and method for managed pressure drilling
03/01/2012WO2012027157A1 Variable flow restrictor for use in a subterranean well
03/01/2012WO2012026875A1 Method and system for controlling a compressor at a rock drilling apparatus and a rock drilling apparatus
03/01/2012WO2012026874A1 Method and system for determining a variation in a flushing medium flow and rock drilling apparatus
03/01/2012WO2012024786A1 Drilling fluid and method for drilling in coal-containing formations
03/01/2012WO2011153621A9 Rotating flow control diverter
03/01/2012WO2011091157A3 Differential pressure wellbore tool and related methods of use
03/01/2012US20120048620 Pressure limiting controller
03/01/2012CA2808762A1 Drilling fluid and method for drilling in coal-containing formations
03/01/2012CA2808080A1 Variable flow restrictor for use in a subterranean well
02/2012
02/29/2012EP2422925A1 Removal device
02/29/2012CN202152652U 水力旋转喷射喷头 Hydraulic rotary spray nozzle
02/29/2012CN202152632U 一种钻探机构 A method of drilling agency
02/29/2012CN102365418A System and method for minimizing lost circulation
02/28/2012US8124658 Surfactants for tertiary mineral oil extraction based on branched alcohols
02/28/2012US8122962 Apparatus and method for deliquifying a well
02/28/2012US8122959 Methods and materials for zonal isolation
02/28/2012US8122947 Turbulent device to prevent phase separation
02/28/2012CA2510758C Apparatus for the cooling of drilling liquids
02/25/2012CA2747277A1 Self-orienting crossover tool
02/23/2012WO2011146253A3 Retaining and isolating mechanisms for magnets in a magnetic cleaning tool
02/23/2012WO2011091165A3 Wellbore filter screen and related methods of use
02/23/2012US20120043134 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells
02/22/2012CN202148877U 限压装置 Pressure limiting device
02/22/2012CN102359353A Closed-loop controlled-pressure well drilling system
02/22/2012CN102359352A Porthole dust catcher
02/21/2012USRE43199 Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells
02/21/2012US8118114 Closed-loop control of rotary steerable blades
02/21/2012CA2615911C Partial coil-in-coil tubing
02/16/2012WO2012021693A1 Arrangement and method for detecting fluid influx and/or loss in a well bore
02/15/2012CN102352732A Runner switching and controlling system
02/15/2012CN102352731A Downhole tubular column lifting device capable of transmitting torque in whole course
02/15/2012CN102352730A Process for handling accident of jamming of drilling tool by settled sand
02/14/2012US8114817 Filtercake removal composition and system
02/09/2012WO2012018700A2 Abrasive perforator with fluid bypass
02/09/2012WO2012018620A2 Method and apparatus for transforming a pressure drop into a continuous fluid flow
02/09/2012WO2012018496A2 Downhole displacement based actuator
02/09/2012WO2012018261A1 Pump positioned at a drill bit
02/09/2012US20120031680 Drill Cuttings Box Combined Cuttings Feed Inlet and Air Outlet Apparatus
02/09/2012CA2807310A1 Abrasive perforator with fluid bypass
02/09/2012CA2805845A1 Pump positioned at a drill bit
02/08/2012EP2415960A2 Continuous flow drilling systems and methods
02/08/2012EP2414621A2 Adjustable flow control devices for use in hydrocarbon production
02/08/2012EP2414620A2 Drill pipe connector
02/08/2012EP2414619A2 Apparatus for and method of drilling a subterranean borehole
02/08/2012EP2414092A1 Methods and systems for slurry blending
02/08/2012CN102345450A Annulus flow-diverting joint (FDJ) and correlation calculation method thereof
02/08/2012CN101328786B 钻井自动灌浆控制方法及控制系统 Drilling automatic filling control method and control system
02/07/2012CA2579218C Method of drilling a lossy formation
02/02/2012WO2012015574A2 Control system for mud cleaning apparatus
02/02/2012WO2012015315A1 Riserless, pollutionless drilling system
02/02/2012WO2012014178A2 Drilling fluid recovery when drilling under an obstacle or water body
02/02/2012WO2011153621A3 Rotating flow control diverter
02/02/2012US20120024607 Dust Collecting Device For A Roof Tool
02/02/2012US20120024602 Control system for mud cleaning apparatus
02/02/2012CA2805715A1 Control system for mud cleaning apparatus
02/01/2012EP1866048B1 Sieve apparatus and method
02/01/2012CN202132007U 双管钻进的排渣装置 Slagging means double tube drilling
02/01/2012CN202132006U 一种带压下管可反洗井底部球座 A tape can backwash pressure tube wells at the bottom of the tee
02/01/2012CN202132005U 泄压泄流机构 Pressure relief discharge mechanism
02/01/2012CN202132004U 一种防尘装置以及具有所述防尘装置的钻井机 A dust-proof device and has a dust-proof means of the drilling machine
02/01/2012CN202132003U 悬挂自由翻转式泥浆收集装置 Hanging freely flip-mud collection device
02/01/2012CN202132002U 钻探施工用除尘混合器 Drilling with dust mixer
02/01/2012CN202131975U 一体化磨盘水龙头 Integrated disc faucet
02/01/2012CN202131973U 煤矿软煤层顺层钻孔用全液压坑道钻机 Soft Coal Seam coal mine hydraulic tunnel drilling rig
02/01/2012CN102341565A Wellbore strengthening material recovery
02/01/2012CN102337854A Washable well type gradual unpacking packer
02/01/2012CN102337846A Atmospheric pressure degasser
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