| 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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| 02/10/2005 | WO2005012688A1 Method and system for accessing subterranean deposits from the surface and tools therefor |
| 02/10/2005 | WO2005012685A1 Drilling method |
| 02/10/2005 | US20050029015 Drilled cuttings movement systems and methods |
| 02/10/2005 | DE10115233B4 Horizontalbohranlage Horizontal drilling rig |
| 02/09/2005 | CN2677594Y Hollow sand washer |
| 02/09/2005 | CN2677593Y Casing scraping sand washer |
| 02/09/2005 | CN2677592Y Mud pipe assemblage |
| 02/09/2005 | CN2677591Y Oil-string casing circulation joint |
| 02/09/2005 | CN1576848A System for degassing muds and for analysing the gases contained in the muds |
| 02/09/2005 | CN1576511A Method for drilling a borehole and wet boring tool |
| 02/08/2005 | US6851490 Apparatus and process for drilling casing with environmentally contained mud annulus |
| 02/03/2005 | US20050023040 Continuous self-cleaning drilling fluid tank |
| 02/03/2005 | US20050023039 Method for sinking a borehole in the ground and wet boring tool |
| 02/03/2005 | US20050023038 Drilling systems |
| 02/03/2005 | US20050023000 Cement float |
| 02/03/2005 | CA2533430A1 Down hole hammer drill |
| 02/02/2005 | EP1503258A1 Method to optimise the utilisation of a spouter |
| 01/27/2005 | WO2004079155A3 Methods and apparatus for handling and drilling with tubulars or casing |
| 01/27/2005 | WO2004020775A3 Method and apparatus for removing cuttings |
| 01/27/2005 | US20050016773 Petroleum drilling method and apparatus to cool and clean drill bit with recirculating fluid composition while reclaiming most water utilized and greatly reducing the normal consumption of water during drilling |
| 01/27/2005 | US20050016724 Method of controlling a well experiencing gas kicks |
| 01/26/2005 | CN2674085Y Novel, vehicle carried, self-moving and multi-functional oil prodn. vehicle |
| 01/26/2005 | CN2674075Y Means for dust-removing and top impacting prevention for obscure hole drilling machine |
| 01/25/2005 | US6845820 Completion apparatus and methods for use in hydrocarbon wells |
| 01/25/2005 | CA2474184A1 Petroleum drilling method and apparatus to cool and clean drill bit with recirculating fluid composition while reclaiming most water utilized and greatly reducing the normal consumption of water during drilling |
| 01/20/2005 | WO2005005766A1 Device for transporting particles of a magnetic material and tool comprising such a device |
| 01/20/2005 | WO2004097155A3 Casing with isolated annular space |
| 01/20/2005 | WO2004092633A3 Spoolable composite coiled tubing connector |
| 01/20/2005 | US20050014654 Method of reclaiming brine solutions using an organic chelant |
| 01/20/2005 | US20050011678 Method and device for injecting a fluid into a formation |
| 01/19/2005 | EP1497530A1 Method for increasing production from a wellbore |
| 01/19/2005 | EP1497527A1 Method of drilling with magnetorheological fluid |
| 01/19/2005 | CN2672277Y High frequency linear drilling liquid vibrative sieve |
| 01/18/2005 | US6843331 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| 01/13/2005 | WO2005003508A1 Circulation tool |
| 01/13/2005 | US20050006150 Solids strainer system for a hydraulic choke |
| 01/13/2005 | US20050006149 Solids control system |
| 01/13/2005 | US20050006148 Assembly for drilling low pressure formation |
| 01/13/2005 | US20050006147 Method and apparatus with slips assembly for coupling tubulars without interruption of circulation |
| 01/13/2005 | US20050006144 Liquid lift method for drilling risers |
| 01/12/2005 | EP1496297A2 Vessel for well intervention |
| 01/12/2005 | EP1496096A2 Additive for oil-based drilling fluids |
| 01/12/2005 | EP1155216B1 Drilling method |
| 01/12/2005 | EP1109609A4 Apparatus and method for handling waste |
| 01/11/2005 | US6840337 Method and apparatus for removing cuttings |
| 01/11/2005 | US6840327 Annular pressure spool |
| 01/11/2005 | US6840322 Subsea well intervention vessel |
| 01/06/2005 | WO2005001237A1 Downhole activatable annular seal assembly |
| 01/06/2005 | US20050000695 Filling and circulating apparatus for subsurface exploration |
| 01/06/2005 | US20050000691 Methods and apparatus for handling and drilling with tubulars or casing |
| 01/05/2005 | CN1561427A Washpipe assembly |
| 01/04/2005 | US6838485 Treatments for drill cuttings |
| 01/04/2005 | US6838082 Vermiculture compositions |
| 01/04/2005 | US6837313 Apparatus and method to reduce fluid pressure in a wellbore |
| 12/30/2004 | US20040265176 comprises a tank, feeders, extractors, analyzer; extractors comprise an ultrasonic electroacoustic transducer and the mud feeders comprise volume and flow rate regulators that enable a preset constant volume of mud to be guaranteed in the tank and the flow rate to be adjusted to a preset constant value |
| 12/30/2004 | US20040262013 Wired casing |
| 12/29/2004 | WO2004072434A3 Methods and apparatus for wellbore construction and completion |
| 12/29/2004 | EP1491716A2 Method for drilling a borehole and wet boring tool |
| 12/29/2004 | EP1490956A1 Magnetic power transmission devices for oilfield applications |
| 12/29/2004 | CN2667150Y Multiphase flow rotary wing mixer |
| 12/28/2004 | US6834726 Method and apparatus to reduce downhole surge pressure using hydrostatic valve |
| 12/26/2004 | CA2433475A1 Drilling fluid treatment tank |
| 12/23/2004 | US20040259738 Method for using reversible phase oil-based drilling fluid |
| 12/23/2004 | US20040256161 Modular design for downhole ECD-management devices and related methods |
| 12/23/2004 | US20040256160 Mud diverter and method for horizontal drilling |
| 12/23/2004 | US20040256157 Method and apparatus for drilling a borehole with a borehole liner |
| 12/23/2004 | US20040256105 Method and apparatus for heating drilling and/or completion fluids entering or leaving a well bore during oil and gas exploration and production |
| 12/22/2004 | EP1488073A1 Dynamic annular pressure control apparatus and method |
| 12/22/2004 | EP1238182B1 Flow actuated shut-off valve |
| 12/21/2004 | US6832656 Valve for an internal fill up tool and associated method |
| 12/16/2004 | US20040254734 Method for optimizing production of an oil reservoir in the presence of uncertainties |
| 12/16/2004 | US20040251167 Auger cleaning of solids |
| 12/16/2004 | US20040251032 Apparatus and methods for utilizing a downhole deployment valve |
| 12/16/2004 | US20040251023 Downhole surge pressure reduction and filtering apparatus |
| 12/16/2004 | DE10146025B4 Verfahren und System zum horizontalen Erdbohren sowie Schlagspitze und Verfahren zum Starten eines Schlagwerkzeugs Method and system for horizontal Erdbohren and striking tip and method for starting a striking tool |
| 12/15/2004 | EP1485574A2 Method and system for controlling well circulation rate |
| 12/15/2004 | EP1060320A4 Method and apparatus for drilling a borehole into a subsea abnormal pore pressure environment |
| 12/14/2004 | US6832158 Real-time method for maintaining formation stability and monitoring fluid-formation interaction |
| 12/14/2004 | US6831108 Viscoelastic surfactant fluids and related methods of use |
| 12/14/2004 | US6830107 Fluid flow switching device |
| 12/12/2004 | CA2470960A1 Cement float |
| 12/09/2004 | WO2004106694A1 Pressure controlled downhole operations |
| 12/09/2004 | US20040246468 Electronic surveying apparatus |
| 12/09/2004 | US20040245020 Apparatus and methods for drilling a wellbore using casing |
| 12/09/2004 | US20040244982 Substantially neutrally buoyant and positively buoyant electrically heated flowlines for production of subsea hydrocarbons |
| 12/09/2004 | US20040244972 Method, apparatus and system for pore pressure prediction in presence of dipping formations |
| 12/08/2004 | EP1484472A1 Modular mud plant |
| 12/08/2004 | CN1553984A System for controlling the discharge of drilling fluid |
| 12/02/2004 | WO2004104366A1 Reverse circulation cementing process |
| 12/02/2004 | US20040238414 Shale shaker |
| 12/02/2004 | US20040238218 Injecting a fluid into a borehole ahead of the bit |
| 12/02/2004 | US20040238180 Large particulate removal system |
| 12/02/2004 | US20040238177 Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells |
| 12/02/2004 | DE10328609B3 Wet-drilling tool for drilling a hole in the ground comprises a passage device having a tubular dome with an inlet opening above a collecting container and a connecting rod connection for a boring rod |
| 12/02/2004 | CA2469960A1 Method for optimizing the production of an oil deposit in the face of uncertainties |
| 12/01/2004 | EP1481147A1 Methods of discovering and correcting subterranean formation integrity problems during drilling |
| 12/01/2004 | EP1024907A4 Apparatus for recovering hydrocarbons from solids |
| 12/01/2004 | CN2660097Y Perforation washing tool |
| 12/01/2004 | CN1551943A Assembly for drilling low pressure formation |
| 11/30/2004 | US6825152 Method for creating dense drilling fluid additive and composition therefor |