| 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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| 09/27/2011 | US8025111 Agitator for a drill and related methods |
| 09/27/2011 | US8025108 Subterranean methods of processing hydrocarbon fluid-containing deposits and hydrocarbon recovery arrangements for recovering hydrocarbon-containing fluid from hydrocarbon-containing deposits |
| 09/27/2011 | CA2514594C Valve and method for drilling with casing using pressurized drilling fluid |
| 09/22/2011 | WO2011113155A1 Casing fill-up fluid management tool |
| 09/22/2011 | WO2011113132A1 Optimization of vacuum systems and methods for drying drill cuttings |
| 09/22/2011 | WO2011068633A3 Pumping mud by electrohydrodynamic propulsion |
| 09/22/2011 | CA2792805A1 Casing fill-up fluid management tool |
| 09/21/2011 | EP2366868A1 Method for reducing the injection pressure of a polymer solution in an oil well without shear degradation |
| 09/21/2011 | EP2366867A2 Apparatus for cleaning boreholes within substrates |
| 09/21/2011 | CN201982067U 移动式污油回收装置 Mobile waste oil recovery |
| 09/21/2011 | CN201982039U 注水井活动式可取式底阀 Injection Wells movable Retrievable bottom valve |
| 09/21/2011 | CN201982038U 修井液回收处理车 Workover fluid recycling car |
| 09/21/2011 | CN201982037U 井下管柱冲砂解堵一体化装置 Downhole string red sand plugging Integrated Device |
| 09/21/2011 | CN201982013U 反循环钻机钻孔、锤击成孔、扩孔、清渣的施工设备 Reverse circulation drilling rig drilling, hammering into the hole, reaming, slag construction equipment |
| 09/21/2011 | CN102191914A Full-hydraulic integrated multipurpose cutting driller |
| 09/20/2011 | CA2635448C System and method for obtaining and using downhole data during well control operations |
| 09/15/2011 | WO2011112869A2 Dual ball upper internal blow out preventer valve |
| 09/15/2011 | WO2011112772A2 System and method for separating solids from fluids |
| 09/15/2011 | WO2011112445A2 Oil-based drilling fluid recovery and reuse |
| 09/15/2011 | WO2011110831A2 Apparatus and method for separating solids from a solids laden drilling fluid |
| 09/15/2011 | US20110220418 Oil-based drilling fluid recovery and reuse |
| 09/15/2011 | DE10115233C5 Horizontalbohranlage Horizontal drilling rig |
| 09/15/2011 | CA2792753A1 Dual ball upper internal blow out preventer valve |
| 09/15/2011 | CA2792250A1 System and method for separating solids from fluids |
| 09/15/2011 | CA2790957A1 Apparatus and method for separating solids from a solids laden drilling fluid |
| 09/14/2011 | CN201972682U 一种水平井注气采油封隔工艺管柱 A horizontal oil well gas injection process column packer |
| 09/14/2011 | CN201972646U 一种井口保护器 One kind of wellhead protection |
| 09/14/2011 | CN201972635U 一种水平井螺旋式冲砂笔尖 A horizontal wells spiral sand washing nib |
| 09/14/2011 | CN1833089B Device for transporting particles of a magnetic material and tool comprising such a device |
| 09/14/2011 | CN102187051A System and method for drying drill cuttings |
| 09/14/2011 | CN102182439A Balanced-pressure perforation/negative-pressure backflow process |
| 09/14/2011 | CN102182411A Method for increasing injection pressure of shaft bottom drilling fluid by use of bit pressure fluctuation |
| 09/14/2011 | CN102182410A Cyclone sand washing device |
| 09/14/2011 | CN102182399A Construction method and equipment for reverse circulation drill to drill hole, hammer to form hole, expand hole and remove slag |
| 09/13/2011 | CA2712774C Optimization of vacuum systems and methods for drying drill cuttings |
| 09/13/2011 | CA2514136C Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
| 09/13/2011 | CA2510461C Wellbore consolidating tool for rotary drilling applications |
| 09/09/2011 | WO2011109748A1 System and method for safe well control operations |
| 09/09/2011 | WO2009135220A3 Fill up and circulation tool and mudsaver valve |
| 09/09/2011 | CA2792031A1 System and method for safe well control operations |
| 09/09/2011 | CA2791719A1 Flow control arrangement and method |
| 09/08/2011 | US20110214871 Flushing procedure for rotating control device |
| 09/08/2011 | US20110214864 Invert drilling fluids having enhanced rheology and methods of drilling boreholes |
| 09/08/2011 | DE102010010036A1 Sealing arrangement for sealing annular space formed between interior connecting rod and exterior connecting rod of drilling drive unit of drilling device, has elastic sealing element for sealing gap of annular space |
| 09/07/2011 | EP2179123B1 Method and device for cleaning and sealing a well |
| 09/07/2011 | EP1720954B1 Method of flocculating suspended particles |
| 09/07/2011 | CN201963255U 永磁防盗掺水井口组合装置 Anti-theft device neat combination of permanent magnet wellhead |
| 09/07/2011 | CN201963249U 一种可洗井注水封隔器 One kind of wash water injection wells packer |
| 09/07/2011 | CN201963231U 一种实现无隔水管泥浆回收钻井的海底泥浆吸入系统 An implementation riserless subsea drilling mud slurry recycling inhalation system |
| 09/07/2011 | CN201963230U 注水井管端总成 Injection Wells tube end assembly |
| 09/07/2011 | CN201963229U 低温移动式泥浆净化系统 Cryogenic mobile mud purification system |
| 09/07/2011 | CN201963228U 石油天然气勘探空气泡沫钻地质取砂器 Air foam drilling oil and gas exploration geology take sand filter |
| 09/07/2011 | CN201963209U 一种用于钻杆的带压钻孔装置 An apparatus for drilling with drill pipe pressure |
| 09/07/2011 | CN201963196U 路面钻孔机 Pavement Drills |
| 09/07/2011 | CN1997807B Systems and methods for remotely determining and changing cutting modes during decoking |
| 09/06/2011 | US8011449 Method and apparatus for directional drilling |
| 09/06/2011 | CA2690140C Fluids and techniques for hydrocarbon well completion |
| 09/01/2011 | WO2011106514A2 Cleaning apparatus and method for a material dryer |
| 09/01/2011 | CA2790881A1 Drilling system and method of operating a drilling system |
| 09/01/2011 | CA2789955A1 Cleaning apparatus and method for a material dryer |
| 08/31/2011 | CN201953353U 活塞式螺杆钻具旁通阀 Bypass valve piston screw drill |
| 08/31/2011 | CN201953330U 泥浆絮凝处理装置 Mud flocculation treatment device |
| 08/31/2011 | CN201953329U 液流转换套铣自洁工具 Flow conversion Washover self-cleaning tool |
| 08/31/2011 | CN102168545A Coiled tubing supercritical CO2 jet fracturing method |
| 08/31/2011 | CN102168537A Washable well type packer capable of unsealing by levels |
| 08/31/2011 | CN102168534A Special mining suction drill for coal mine |
| 08/31/2011 | CN102168530A Pressure drilling device for a drill stem and a using method thereof |
| 08/31/2011 | CN101929309B Gas lift reverse circulation drilling process |
| 08/30/2011 | US8006761 Wellbore fluid comprising a base fluid and a particulate bridging agent |
| 08/30/2011 | CA2657211C Downhole abrading tools having a hydrostatic chamber and uses therfor |
| 08/25/2011 | WO2011103570A2 Reverse circulation apparatus and methods for using same |
| 08/25/2011 | WO2011103051A1 Articulated pre-skimmer mount |
| 08/25/2011 | WO2009090489A3 Wellbore drilling system |
| 08/25/2011 | CA2790484A1 Reverse circulation apparatus and methods for using same |
| 08/25/2011 | CA2789302A1 A valve device for a side pocket or sub in a well |
| 08/24/2011 | EP2358974A1 Systems and methods for operating a plurality of wells through a single bore |
| 08/24/2011 | EP2358971A1 Drill string |
| 08/24/2011 | CN201943615U 气体钻井降尘装置 Gas drilling dust controller |
| 08/24/2011 | CN201943614U 废弃钻井泥浆处理装置 Waste drilling mud processing unit |
| 08/24/2011 | CN102165137A Equipment for controlling amount of water used for binding dust |
| 08/24/2011 | CN102162342A Communicating vessel-type qualitative monitoring method for well kick and lost circulation |
| 08/23/2011 | US8002051 Connection device for forming a fluid supply |
| 08/23/2011 | US8002050 Completion technique and treatment of drilled solids |
| 08/23/2011 | US8002049 Well treating method to prevent or cure lost-circulation |
| 08/23/2011 | US8002038 Liquid carbon dioxide cleaning of wellbores and near-wellbore areas using high precision stimulation |
| 08/23/2011 | CA2657137C Improved high performance water-based drilling fluid |
| 08/23/2011 | CA2519365C System and method for treating drilling mud in oil and gas well drilling applications |
| 08/18/2011 | WO2011100096A1 Compact wastewater concentrator and contaminant scrubber |
| 08/18/2011 | WO2011079319A3 Subsea technique for promoting fluid flow |
| 08/18/2011 | US20110198129 Method and drilling apparatus for down-the-hole drilling |
| 08/18/2011 | US20110198098 Apparatus and method for facilitating the connection of tubulars using a top drive |
| 08/18/2011 | US20110198076 Adjustment of mud circulation when evaluating a formation |
| 08/18/2011 | US20110198073 Apparatus and methods for facilitating the connection of tubulars using a top drive |
| 08/18/2011 | CA2789581A1 Compact wastewater concentrator and contaminant scrubber |
| 08/18/2011 | CA2715949A1 Debris removal system and method for pressure controlled wellbore drilling and intervention operations |
| 08/17/2011 | EP1888871B1 Casing and drill pipe filling and circulation apparatus |
| 08/17/2011 | EP1226336B1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 08/17/2011 | CN201934052U 负压解堵洗井防倒灌多功能井下装置 Negative pressure wash well plugging underground anti-intrusion multifunction device |
| 08/17/2011 | CN201934041U 高压精准控水计量装置 Precise control of high-pressure water metering device |
| 08/17/2011 | CN102155393A Novel oil-well pump capable of cleaning well during oil extraction |