| 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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| 06/15/2006 | US20060124317 Multi-cycle downhole tool with hydraulic damping |
| 06/15/2006 | US20060124300 Method for the circulation of gas when drilling or working a well |
| 06/15/2006 | US20060124296 Hyraulically releasable inflation tool for permanent bridge plug |
| 06/15/2006 | CA2629289A1 Enhanced slurrification method |
| 06/14/2006 | EP1669541A1 Locating joins in coiled tubing operations |
| 06/14/2006 | EP1668220A1 Method and device for boring holes in soil or rock |
| 06/14/2006 | CN1788066A Well-treating method to prevent or cure lost-circulation |
| 06/13/2006 | US7060129 Displacement of gelling additive to well bore; crosslinking; forming barrier |
| 06/13/2006 | US7059881 Spoolable composite coiled tubing connector |
| 06/13/2006 | US7059426 Acoustic flow pulsing apparatus and method for drill string |
| 06/13/2006 | US7059411 Process of using a propellant treatment and continuous foam removal of well debris and apparatus therefore |
| 06/13/2006 | US7059401 Flow control apparatus for use in a wellbore |
| 06/08/2006 | WO2006059147A1 Apparatus and method for guiding pipe |
| 06/08/2006 | WO2006059146A1 Elevator for use in handling pipe and method for handling pipe |
| 06/08/2006 | WO2006059066A1 Diverter tool |
| 06/08/2006 | WO2006059064A1 Diverter tool |
| 06/08/2006 | US20060118338 Drill base |
| 06/08/2006 | US20060118334 Oscillating shear valve for mud pulse telemetry |
| 06/08/2006 | US20060118306 Wellbore annulus flushing valve |
| 06/08/2006 | CA2588728A1 Elevator for use in handling pipe and method for handling pipe |
| 06/07/2006 | EP1666696A2 Apparatus and method for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
| 06/07/2006 | EP1664483A2 Downhole draw down pump and method |
| 06/07/2006 | EP1664478A1 Drilling system and method |
| 06/07/2006 | EP1093540A4 Method and multi-purpose apparatus for control of fluid in wellbore casing |
| 06/07/2006 | CN1782322A Low density foam pressure well-flushing technology |
| 06/07/2006 | CN1258633C Method for drilling and drilling apparatus |
| 06/06/2006 | US7056008 Fluid mixing system |
| 06/06/2006 | US7055628 removing drilling cuttings with an aqueous foam drilling fluid including a foaming agent comprising a mono-(aliphatic hydrocarbyl) phosphate ester, and a foam stabilizer comprising an alkyl ether sulphate, a fatty acid alkanolamide derivative, or an amine oxide |
| 06/06/2006 | US7055627 Wellbore fluid circulation system and method |
| 06/06/2006 | US7055605 Downhole circulation valve operated by dropping balls |
| 06/01/2006 | US20060113115 Ball operated by-pass tool for use in drillstring |
| 06/01/2006 | US20060113110 Drilling system and method |
| 05/31/2006 | EP1660753A1 Method and apparatus for adding a tubular to drill string with diverter |
| 05/31/2006 | CN2785000Y Full-frequency conversion and full-automatic control system for drilling fluid centrifuger |
| 05/31/2006 | CN2784575Y Dual-action valve for well cleanup and oil release |
| 05/31/2006 | CN1780891A Water block removal with surfactant based hydrocarbonaceous liquid system |
| 05/30/2006 | US7054752 Method for optimizing production of an oil reservoir in the presence of uncertainties |
| 05/30/2006 | US7051812 Fracturing tool having tubing isolation system and method |
| 05/26/2006 | WO2006054905A1 Annular pressure control system |
| 05/25/2006 | US20060108152 Dart-operated big bore by-pass valve |
| 05/25/2006 | US20060108150 Comprises chabazite; well bores |
| 05/24/2006 | EP1659258A2 Top drive for casing connection |
| 05/24/2006 | EP1409840B1 Discharging sand from a vessel at elevated pressure |
| 05/24/2006 | CN2782922Y Sand settling blocking-proof counter flooding valve |
| 05/24/2006 | CN2782910Y Pipe column without pressing oil reservoir for well cleanout |
| 05/24/2006 | CN1777737A Method and apparatus for detecting while drilling underbalanced the presence and depth of water produced from the formation. |
| 05/23/2006 | US7048865 removal of sand, or rock or other particulate matter from a flow stream at high pressure, before the flow stream reaches manifolds or other production or drilling equipment with moving parts; sand knock out system |
| 05/23/2006 | US7048079 Mud saver valve |
| 05/23/2006 | US7048050 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 05/18/2006 | WO2006051168A1 Arrangement for sucking dust |
| 05/18/2006 | US20060102387 Internal riser rotating control head |
| 05/18/2006 | US20060102355 Automatic chemical treatment system with integral flush fluid dispenser |
| 05/18/2006 | US20060102201 Coiled tubing wellbore cleanout |
| 05/17/2006 | EP1611311A4 System and method for treating drilling mud in oil and gas well drilling applications |
| 05/17/2006 | CN1256500C 流体混合系统 Fluid mixing system |
| 05/16/2006 | US7046165 Method for collecting geological data ahead of a drill bit |
| 05/16/2006 | US7044237 Drilling system and method |
| 05/16/2006 | US7044229 Downhole valve device |
| 05/11/2006 | WO2006048811A1 Dry polymer hydration apparatus and methods of use |
| 05/11/2006 | US20060096769 Pneumatic ground piercing tool |
| 05/11/2006 | US20060096759 Methods and compositions for controlling lost circulation in subterranean operations |
| 05/11/2006 | DE102005051585A1 Pneumatisches Bodenstechwerkzeug Pneumatic floor grooving tool |
| 05/11/2006 | CA2584373A1 Dry polymer hydration apparatus and methods of use |
| 05/10/2006 | EP1654437A1 Electrical treatment for oil based drilling or completion fluids |
| 05/10/2006 | CN2779043Y Sand flushing drill plug circulator |
| 05/10/2006 | CN1769644A Kick warning system using high frequency fluid mode in a borehole |
| 05/09/2006 | US7040420 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 05/09/2006 | US7040418 Proppant recovery system |
| 05/09/2006 | US7040408 Flowhead and method |
| 05/09/2006 | CA2170184C Steerable rotary drilling systems |
| 05/08/2006 | CA2525331A1 Pneumatic ground piercing tool |
| 05/04/2006 | US20060090906 Apparatus and method for wellbore isolation |
| 05/03/2006 | EP1570154A4 Well bore cleaning and tubular circulating and flow-back apparatus |
| 05/03/2006 | EP1558833A4 Drilling mud filtration device |
| 05/03/2006 | EP1337759B1 Hydraulic drill string accumulator |
| 05/03/2006 | CN2777182Y Sand-proof and well washing valve |
| 05/03/2006 | CN2777181Y Multi-functional cleaning apparatus for removing sand and mud |
| 05/03/2006 | CN1767908A Vibratory screening machine for earth drilling installation |
| 05/03/2006 | CN1766281A Automatic switching three-way circulation joint for oil well |
| 05/02/2006 | US7036594 Controlling a pressure transient in a well |
| 05/02/2006 | CA2296003C Device and method for measuring the flow rate of drill cuttings |
| 04/27/2006 | US20060089266 Methods of stabilizing surfaces of subterranean formations |
| 04/27/2006 | US20060086538 Choke for controlling the flow of drilling mud |
| 04/26/2006 | EP1649129A1 Device for transporting particles of a magnetic material and tool comprising such a device |
| 04/26/2006 | EP1552103A4 Drill head steering |
| 04/26/2006 | EP1540131A4 "top drive swivel apparatus and method" |
| 04/26/2006 | EP1476258B1 THERMAL PROCESS FOR TREATING HYDROCARBON−CONTAMINATED DRILL CUTTINGS |
| 04/26/2006 | EP1294495B1 Apparatus and methods for making a screen and a screen made by the method |
| 04/26/2006 | CN2775410Y Speed reducer |
| 04/26/2006 | CN2775286Y Anchor rod spherical support plate and irregular washer |
| 04/25/2006 | US7033977 Mixture of hollow particles in fluid; well completion |
| 04/25/2006 | US7032691 Underbalanced well drilling and production |
| 04/25/2006 | US7032668 Cementing system and method for wellbores |
| 04/25/2006 | US7032658 High power umbilicals for electric flowline immersion heating of produced hydrocarbons |
| 04/25/2006 | CA2401386C Coiled tubing swivel with stepped bearing races |
| 04/25/2006 | CA2334741C Casing drilling shoe |
| 04/20/2006 | US20060081508 Drill fluid screening device |
| 04/20/2006 | DE102004042956A1 Verfahren und Fülleinrichtung zum Auffüllen von Bohrzügen mit Bohrflüssigkeit Process and filling device for filling Bohrzügen with drilling fluid |
| 04/20/2006 | CA2848643A1 Modular pressure control and drilling waste management apparatus for subterranean borehole operations |
| 04/20/2006 | CA2581893A1 Modular pressure control and drilling waste management apparatus for subterranean borehole operations |