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)
05/2012
05/30/2012CN102477845A 一种用于超短半径水平井的钻井方法 A short radius horizontal well drilling method used
05/30/2012CN102477844A 环空充气法欠平衡钻井工艺 Annulus inflatable France underbalanced drilling technology
05/30/2012CN102226382B Uninterrupted circulating pup joint and continuous slurry circulation method for petroleum well drilling
05/30/2012CN101469601B Automatic relief arrangement
05/30/2012CN101408094B Combined sand-washing well repairing machine
05/30/2012CN101403279B Well bottom booster pump
05/30/2012CN101382048B Defoaming method and device for eliminating foam of drilling fluid by thermal radiation
05/30/2012CN101180448B Water based completion and displacement fluid and method of use
05/29/2012CA2483244C Drill string shutoff valve
05/29/2012CA2450329C Compositions for drilling fluids useful to provide flat temperature rheology to such fluids over a wide temperature range and drilling fluids containing such compositions
05/24/2012WO2012067579A1 Method, system and rock drilling apparatus for installing a pipe in drilled holes in rock drilling
05/24/2012CA2818072A1 Method of and apparatus for drilling a subterranean borehole
05/24/2012CA2817087A1 Method, system and rock drilling apparatus for installing a pipe in drilled holes in rock drilling
05/23/2012CN202228058U Well-flushing balanced injection string
05/23/2012CN202228056U Four-stage four-section separated-injection pipe column protected by inserted sealing jacket and capable of backwashing well
05/23/2012CN202228026U Sand setting type cleanable well check valve suitable for high-inclination well
05/23/2012CN202228025U Mud vibration screen for petroleum drilling
05/23/2012CN202228024U Submersible mud pump-type reverse circulation drill
05/23/2012CN202228023U Return pressure compensation device
05/23/2012CN202228022U Sand-washing pen point
05/23/2012CN102472092A Alternating flow resistance increases and decreases for propagating pressure pulses in a subterranean well
05/23/2012CN102472091A 具有一个或更多个可收回型元件的流动控制装置 Having one or more flow recoverable type element control means
05/23/2012CN102465675A 冲砂阀 Red sand valve
05/23/2012CN101995431B Mechanical system of magnetic leakage detector for wellhead drill stem of drilling machine
05/23/2012CN101235709B Petroleum engineering circulating gas regeneration method and its special equipment
05/23/2012CN101210483B Continuous sand flushing technique and continuous sand flushing device thereof
05/22/2012US8183181 Oil field treatment fluids comprising zwitterionic betaine-group-containing polymers
05/22/2012CA2680355C Method and apparatus for controlling the manufacture of well treatment fluid
05/18/2012WO2012064379A1 Pumping mud by electrohydrodynamic propulsion
05/18/2012WO2012064199A1 Method and device for establishing a borehole in the seabed
05/18/2012WO2012061876A1 Re-calibration of instruments
05/18/2012CA2854754A1 Method and device for establishing a borehole in the seabed
05/17/2012US20120119076 Method and Apparatus for Detecting while Drilling Underbalanced The Presence and Depth of Water Produced from The Formation and for Measuring Parameters Related Thereto
05/17/2012US20120118644 Method And Device For Drilling Shafts In Ground Layers Consisting Of Rock, Clay And/Or Related Materials
05/17/2012US20120118638 Drilling Method For Drilling A Subterranean Borehole
05/16/2012CN202220572U Repeatedly activatable and recyclable bypass short joint
05/16/2012CN202220571U Filtrate separator
05/16/2012CN202220570U Dust collector for horizontal drilling
05/16/2012CN202220569U Wet dust collector for transverse drilling of drilling machine
05/16/2012CN102454375A Foam generator
05/16/2012CN102454374A Digital display drilling fluid densitometer
05/16/2012CN102454373A Throttle manifold for controlled pressure drilling
05/16/2012CN102454372A Shaft pressure management system and method
05/15/2012US8176985 Well drilling and production using a surface blowout preventer
05/15/2012US8176981 Fluorinated surfactants and methods of using the same
05/15/2012CA2681095C Shale hydration inhibition agent and method of use
05/10/2012WO2012059859A1 Method and apparatus for completion of heavy oil unconsolidated sand reservoirs
05/10/2012CA2795641A1 Method and apparatus for completion of heavy oil unconsolidated sand reservoirs
05/09/2012EP2450416A1 Methods and compositions for suspending fluids in a wellbore
05/09/2012EP2449211A2 Remotely controllable manifold
05/09/2012EP2449205A2 Improved methods and systems for integrated material processing
05/09/2012CN202215171U Drilling cutting collector
05/09/2012CN202215170U Obstacle removal device
05/09/2012CN202215169U Pump circulating construction device and in-water pile construction system
05/09/2012CN202215159U Safety shock-absorbing connector of measure while drilling (MWD) vertical pipe pressure sensor
05/09/2012CN102445242A Method and device for measuring slurry flow rate by eddy current sensor
05/08/2012CA2679649C System and method for reservoir characterization using underbalanced drilling data
05/08/2012CA2457567C Polymer drilling bead recovery system & related methods
05/03/2012WO2012055036A1 Submersible progressive cavity pump driver
05/03/2012WO2011104279A3 Drilling system and method of operating a drilling system
05/03/2012WO2011073704A3 Method and apparatus for handling drilling mud containing an oil/water emulsion
05/03/2012CA2816365A1 Submersible progressive cavity pump driver
05/02/2012EP2446106A2 Apparatus and methods for forming and using subterranean salt cavern
05/02/2012EP2445601A1 Method of making pure salt from frac-water/wastewater
05/02/2012CN202209154U Adjustable nozzle
05/02/2012CN202209153U Efficient sand-removing unblocking tool adopting water jetting
05/02/2012CN102434131A Sand-preventing filling method and equipment for oil and gas well
05/02/2012CN102434120A Back-pressure compensating device for managed-pressure drilling
05/02/2012CN102434119A Control method of Casson model drilling fluid rheological parameters
05/02/2012CN102434098A Hydraulic five-arm anchor drill for coal mine
05/02/2012CN101638575B High-temperature resistant thinner for drilling fluid and production method and use method thereof
05/02/2012CN101514619B Novel direct circulation well cementing device and well cementing method for high-pressure gas underground gas storage well
05/01/2012CA2708591C Methods and apparatus for wellbore construction and completion
05/01/2012CA2695175C Chemical treatment of cuttings for re-injection into subterranean formations
05/01/2012CA2623923C Method of treating well with foamed composition
05/01/2012CA2575212C Cement-free zeolite and fly ash settable fluids and methods therefor
05/01/2012CA2532618C Bi-directional rotary steerable system actuator assembly and method
04/2012
04/26/2012WO2012054324A2 Remotely controllable fluid flow control assembly
04/26/2012WO2012018620A3 Method and apparatus for transforming a pressure drop into a continuous fluid flow
04/26/2012WO2012018496A3 Downhole displacement based actuator
04/25/2012EP2443314A2 Method and device for maintaining sub-cooled fluid to esp system
04/25/2012EP2443309A1 A method for disposal of drilling waste, contaminated sediments and residual waste and a disposal facility for same
04/25/2012EP2276905B1 On-the-fly acid blender with sampling equipment
04/25/2012CN202202837U 洗井封隔器 Wash well packer
04/25/2012CN102425446A 一种用于煤矿井下钻孔的气渣分离一体化临抽装置 An integrated gas residue separation for coal mine drilling temporary pumping device
04/25/2012CN102425386A 一种符合幂律模式的钻井液流变参数控制方法 Drilling fluid rheological parameters of a power-law model control method
04/25/2012CN102425370A 孔底油压马达碎石器组合动力钻具施工方法及装置 Gravel bottom of the hole hydraulic motor combination power drill construction methods and apparatus
04/25/2012CN101638576B 钻井液用屏蔽暂堵胶凝剂及其生产方法和使用方法 Temporary plugging drilling fluid gelling agent and its production method and use
04/25/2012CN101270633B 井下无阻生产定压注入集成阀 Downhole pressure injection given unimpeded production integrated valve
04/25/2012CN101265786B 一种气体钻井携岩工具 A gas drilling tool with the rock
04/24/2012US8163677 Consolidation agents and the use thereof for consolidating molded bodies and geological formations consisting of porous or particulate materials
04/24/2012US8163675 Emulsifier based on polyamines and fatty acid/maleic anhydride
04/24/2012CA2564459C Treatment of hydrocarbon fluids with ozone
04/24/2012CA2483803C Well treatment system and method
04/24/2012CA2483174C Drill string shutoff valve
04/21/2012CA2718595A1 Mobile material handling and metering system
04/19/2012WO2012051196A2 Lift-gas optimization with choke control
04/19/2012WO2012050456A1 Cleaning device
04/19/2012WO2012018700A3 Abrasive perforator with fluid bypass
04/19/2012WO2012015574A3 Control system for mud cleaning apparatus
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