| Patents for E21B 21 - Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor (13,780) |
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| 07/25/2012 | CN202348180U Drilling four-precaution packaged technology device for coal mine |
| 07/25/2012 | CN202348179U Entire slurry filling pump device |
| 07/25/2012 | CN202343449U Anti-abrasion and scale-proof screen |
| 07/25/2012 | CN102606191A Drilling, flow guiding, dust falling and gas blowout control device |
| 07/25/2012 | CN102606099A Self-lubricating dust-collecting drill bit device for down-the-hole drill |
| 07/25/2012 | CN102606098A Drilling pressure-control device and usage thereof |
| 07/25/2012 | CN102606097A Electric drill dust cover |
| 07/25/2012 | CN102606096A Method for cleaning mud cakes of inner wall of drilling rod and cleaning device used by method |
| 07/25/2012 | CN102606095A Self-circulation gas production and ash discharge self-adaptation control system started in deloading way |
| 07/25/2012 | CN102606071A Multifunctional road pile drilling machine |
| 07/25/2012 | CN102606070A Combined drilling technique of vegetable gum diamond coring and downhole hammer casing drilling |
| 07/25/2012 | CN102605768A Bore cleaning device for cast-in-place bored piles |
| 07/24/2012 | US8227382 Breaker fluids and methods of using the same |
| 07/24/2012 | US8225856 Treatment for recycling fracture water—gas and oil recovery in shale deposits |
| 07/19/2012 | WO2012096945A2 Method for cleaning drill cuttings |
| 07/19/2012 | WO2012051196A3 Lift-gas optimization with choke control |
| 07/19/2012 | WO2012037357A3 Tank system |
| 07/19/2012 | US20120181086 Drill Cuttings Methods and Systems |
| 07/19/2012 | US20120181085 Method for cleaning drill cuttings |
| 07/19/2012 | CA2824179A1 Gravity based fluid trap |
| 07/18/2012 | EP2475841A2 Improved methods and systems for integral blending and storage of materials |
| 07/18/2012 | EP2475840A2 Systems and methods for circulating out a well bore influx in a dual gradient environment |
| 07/18/2012 | CN202338246U Disassembling device of rubber core of splitter |
| 07/18/2012 | CN202338244U Inserted type sealant core well drilling flow divider |
| 07/18/2012 | CN202338243U 电缆测井井控悬挂装置 Wireline Well Control suspension |
| 07/18/2012 | CN202338242U 多功能井口返出液回收操作台 Multifunction wellhead back to the liquid recovery console |
| 07/18/2012 | CN202338241U Lifting and descending device for frame of drilling fluid vibrating screen |
| 07/18/2012 | CN202338240U Borehole cleaning tool |
| 07/18/2012 | CN202338239U 局部反循环冲、捞砂泵 Partially reverse circulation Chong, fishing sand pump |
| 07/18/2012 | CN202338238U Rock cutting cleaning tool for window opening of multilateral wells |
| 07/18/2012 | CN202338237U Rotary nozzle for horizontal well |
| 07/18/2012 | CN202338236U 井下冲砂管柱 Downhole sand washing column |
| 07/18/2012 | CN202338235U 油井不压井洗井管柱 Well snubbing flushing column |
| 07/18/2012 | CN102587979A Method for treating salty mud generated in rock salt solution mining sodium sulfate type brine purification |
| 07/18/2012 | CN102587850A Recovery device of well drilling liquid |
| 07/18/2012 | CN102587849A Device for separating well drilling rock cuttings from well drilling waste liquid |
| 07/18/2012 | CN102587824A High-wind-pressure impactor |
| 07/18/2012 | CN101333916B Closed well washing device |
| 07/17/2012 | US8220565 Treatment of subterranean formations |
| 07/17/2012 | US8220548 Surfactant wash treatment fluids and associated methods |
| 07/17/2012 | CA2620092C Method and apparatus for heating drilling and/or completion fluids entering or leaving a well bore during oil and gas exploration and production |
| 07/17/2012 | CA2548962C Method and apparatus for directional drilling |
| 07/12/2012 | WO2012033872A3 Offshore thermal treatment of drill cuttings fed from a bulk transfer system |
| 07/12/2012 | US20120175117 Methods and devices for forming a wellbore with casing |
| 07/11/2012 | EP2473446A2 Compact wastewater concentrator using waste heat |
| 07/11/2012 | CN202327109U 石油钻机专用水龙头冲管复合密封装置 Composite seal oil rig dedicated faucet red tube |
| 07/11/2012 | CN202325631U 用于煤矿井下钻孔的气渣分离及煤层气回收装置 Slag separation and recovery of coalbed methane gas for coal mine drilling |
| 07/11/2012 | CN202325573U 煤巷钻孔防突装置 Coal Lane drilling outburst prevention device |
| 07/11/2012 | CN202325406U Bridge-through lateral uniflow forward-direction pressure guide valve |
| 07/11/2012 | CN202325324U 多功能钻井液智能监控仪 Multifunctional drilling Intelligent Monitor |
| 07/11/2012 | CN202325323U 冲砂、刮蜡、封隔一体式井下作业工具 Sand washing, scraping wax, packers integrated Downhole Tools |
| 07/11/2012 | CN202325322U 携砂射流装置 Sand jet carrying devices |
| 07/11/2012 | CN202325321U 地层漏失井洗井保护器 Well flushing formation leakage protection |
| 07/11/2012 | CN202325233U 一种履带式液压锚杆钻车 Tracked hydraulic anchor drill rig |
| 07/11/2012 | CN102575502A Method of drilling a subterranean borehole |
| 07/11/2012 | CN102575501A Systems and methods for circulating out a well bore influx in a dual gradient environment |
| 07/11/2012 | CN102575147A Hydrocarbon recovery operations fluids and methods for using the same |
| 07/11/2012 | CN102574022A Method of making pure salt from frac-water/wastewater |
| 07/11/2012 | CN102561994A Completion reoperation blowout control tail tube valve |
| 07/11/2012 | CN102561964A Driving device assembly of mud pump valve |
| 07/11/2012 | CN102561963A Flushing fluid treatment equipment |
| 07/11/2012 | CN102561962A Coal bed gas guiding well-washing machine |
| 07/11/2012 | CN102561947A Vibroflotation lead hole construction method based on pneumatic drill slag stirring |
| 07/11/2012 | CN102559154A Deoxidant for drilling fluid and preparation method for deoxidant |
| 07/10/2012 | US8215398 Polysaccharide based scale inhibitor |
| 07/10/2012 | CA2505252C Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| 07/05/2012 | WO2012091599A1 Method for tracking a treatment fluid in a subterranean formation |
| 07/05/2012 | WO2012033741A3 Apparatus and system to allow tool passage ahead of a bit |
| 07/05/2012 | US20120168156 Slurrification process |
| 07/04/2012 | EP2139968B1 Treatment for recycling fracture water - gas and oil recovery in shale deposits |
| 07/04/2012 | CN202300308U 反洗井封隔器 Backwash well packer |
| 07/04/2012 | CN202300302U 可洗井式逐级解封封隔器 Washable Pit progressively re-opened packer |
| 07/04/2012 | CN202300260U 一种自动节流管汇系统 An automatic choke manifold system |
| 07/04/2012 | CN202300259U 油田注水井洗井服务器 Oilfield Well Washing server |
| 07/04/2012 | CN202300258U 一种液体回收装置 A liquid recovery |
| 07/04/2012 | CN202300257U 欠平衡钻井液气分离器 Underbalanced drilling fluid-gas separator |
| 07/04/2012 | CN202300256U 一种动力头钻机的排浆装置 A power head drilling rig slurry discharge device |
| 07/04/2012 | CN202300255U 采油循环钻井系统 Oil circulation drilling system |
| 07/04/2012 | CN202300254U 流体携砂实验装置 Fluid carrying sand experimental device |
| 07/04/2012 | CN1748072B Actuator for well-head valve or other similar applications and system incorporating same |
| 07/04/2012 | CN1690357B Openhole perforating device |
| 07/04/2012 | CN102549231A Method and system for transferring signals through a drill pipe system |
| 07/04/2012 | CN102536144A Coal-seam gas dual-channel well-washing valve |
| 07/04/2012 | CN102536143A Device for continuously cycling and controlling manifold without stopping pumping for drilling |
| 07/04/2012 | CN102536142A Method for pumping and washing coal bed methane discharge well uninterruptedly |
| 07/04/2012 | CN102535444A Cavern-pile mechanical construction method for shallow subsurface excavated metro station at water-rich sandy stratum |
| 07/04/2012 | CN101139925B Method for while-drilling testing reservoir parameter property and adjusting well drilling action in real time |
| 07/04/2012 | CN101139911B Gas injection pressure-stabilizing drilling method |
| 07/03/2012 | CA2722369C System and method for land application of waste fluids |
| 06/28/2012 | WO2012088132A2 Surface signal for flow blockage for a subterranean debris collection apparatus |
| 06/28/2012 | WO2012084220A1 Method for analyzing at least a cutting emerging from a well, and associated apparatus |
| 06/28/2012 | US20120160566 Use of cuttings tanks for recycling oil based mud and water |
| 06/28/2012 | US20120160485 Treatment of Subterranean Formations |
| 06/27/2012 | EP2469222A1 Method for analyzing at least a cutting emerging from a well, and associated apparatus. |
| 06/27/2012 | EP2469013A2 Flow stop valve |
| 06/27/2012 | EP2467571A2 Method for determining formation fluid control events in a borehole using a dynamic annular pressure control system |
| 06/27/2012 | EP2467570A2 Alternating flow resistance increases and decreases for propagating pressure pulses in a subterranean well |
| 06/27/2012 | EP2467566A2 Self aligning mud saver valve seat |
| 06/27/2012 | EP2467561A1 Flow stop valve |
| 06/27/2012 | CN202284457U 流道转换控制系统 Runner conversion control system |