| 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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| 04/19/2006 | EP1647336A1 Drill fluid screening device |
| 04/19/2006 | CN2773300Y Medium-low pressure natural gas separating and dust-collecting recovering device |
| 04/19/2006 | CN1760854A Intelligent designer for prescription of drilling fluid |
| 04/18/2006 | US7028787 Tong for wellbore operations |
| 04/18/2006 | US7028771 Hydrocarbon recovery |
| 04/18/2006 | US7028769 Well bore cleaning and tubular circulating and flow-back apparatus |
| 04/13/2006 | WO2006039665A2 Apparatus and method for well completion |
| 04/13/2006 | WO2006038851A1 Sleeve arrangement |
| 04/13/2006 | WO2005073278A3 Consolidation agents and the use thereof for consolidating moulded bodies and geological formations consisting of porous or particulate materials |
| 04/13/2006 | US20060075801 Device for preparing a fluid particularly a drilling mud, associated preparation method and associated analysis unit |
| 04/13/2006 | DE19918775B4 Mixing apparatus for the production of a drilling fluid for horizontal boring has a high pressure pump and a pipe for addition medium |
| 04/13/2006 | CA2576897A1 Sleeve arrangement |
| 04/12/2006 | EP1645718A2 Device for preparing a fluid, in particular a drilling fluid, method of preparation and associated system for analysis |
| 04/12/2006 | CN2771465Y Intelligent mud control device |
| 04/12/2006 | CN1757878A Construction method of optical fiber television logging instrument for detecting fish top detection |
| 04/11/2006 | US7027968 Method for simulating subsea mudlift drilling and well control operations |
| 04/11/2006 | US7025154 Method and system for circulating fluid in a well system |
| 04/11/2006 | US7025153 Method for handling, processing and disposing of drill cuttings |
| 04/11/2006 | US7025140 Large particulate removal system |
| 04/11/2006 | CA2522864A1 Device for preparing a fluid, in particular a drilling fluid, process for preparing it and all of the related analyses |
| 04/06/2006 | WO2006035124A1 Device for extracting at least one gas contained in a drilling mud and associated analysis assembly |
| 04/06/2006 | WO2005040544A3 Internal blow out preventer ball and seat |
| 04/06/2006 | US20060071809 Method for collecting geological data from a well bore using casing mounted sensor |
| 04/06/2006 | US20060070735 Apparatus and method for well completion |
| 04/06/2006 | CA2581242A1 Device for extracting at least one gas contained in a drilling mud and associated analysis assembly |
| 04/04/2006 | US7021406 Method of drilling with magnetorheological fluid |
| 04/04/2006 | US7021385 Method and apparatus for controlling well pressure in open-ended casing |
| 04/04/2006 | US7021384 Apparatus and method for wellbore isolation |
| 04/04/2006 | US7021375 Methods of downhole testing subterranean formations and associated apparatus therefor |
| 03/30/2006 | WO2006032931A1 Method and apparatus for remediating drill cuttings |
| 03/30/2006 | US20060065402 Drilling system and method for controlling equivalent circulating density during drilling of wellbores |
| 03/30/2006 | DE102004044747A1 Verfahren und Spülkopf zum Freilegen von im Erdreich verlegten Anlagen A method for exposing and flushing head laid in the ground equipment |
| 03/29/2006 | EP1432887B1 System for controlling the discharge of drilling fluid |
| 03/29/2006 | CN2767970Y Bi-directional flow float flux tester |
| 03/29/2006 | CN2767969Y Polyphase flow test float flow sensor |
| 03/29/2006 | CN2767644Y By-pass valve |
| 03/28/2006 | US7018955 Prevention fluid loss using plant extracts and alkyl glycoside; antiswelling agent |
| 03/28/2006 | US7017681 Device for performing hydrodynamic action on wellbore walls |
| 03/28/2006 | US7017671 Mud saver valve |
| 03/23/2006 | WO2006031119A1 Method and system for return of drilling fluid |
| 03/22/2006 | EP1558831A4 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| 03/22/2006 | EP1516104B1 A valve for a fill up tool |
| 03/22/2006 | EP1313463B1 Fatty acid analogues for the treatment of cancer |
| 03/22/2006 | EP1147286B1 Slurry treatment |
| 03/22/2006 | CN1751169A Dynamic annular pressure control apparatus and method |
| 03/21/2006 | US7014391 Portable environmental containment system |
| 03/21/2006 | US7013997 Methods and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 03/21/2006 | US7013971 Reverse circulation cementing process |
| 03/21/2006 | CA2445836C Apparatus and method for operating an internal combustion engine to reduce free oxygen contained within engine exhaust gas |
| 03/21/2006 | CA2376443C Electrical surface activated downhole circulating sub |
| 03/20/2006 | CA2499862A1 Mini core in drilling samples for high resolution formation evaluation on drilling cuttings samples |
| 03/20/2006 | CA2499762A1 Formation gas pore pressure evaluation on drilling cuttings samples |
| 03/17/2006 | CA2499767A1 Horizontal binocular microscope for vertically gravitated and floating samples |
| 03/16/2006 | WO2006029379A1 Control systems and methods for active controlled bottomhole pressure systems |
| 03/16/2006 | US20060054359 Method of decreasing the disintegration of shale-containing cuttings and drilling fluid therefor |
| 03/15/2006 | EP1333904B1 A screen for a shale shaker |
| 03/15/2006 | CN2764929Y Gushing-proof operation equipment |
| 03/15/2006 | CN2764926Y Vibrating screen mesh for sizing filtration of drilling fluid |
| 03/15/2006 | CN2764925Y Special-shaped bottom slurry tank for drilling well |
| 03/15/2006 | CN1748072A Actuator for well-head valve or other similar applications and system incorporating same |
| 03/14/2006 | US7011167 Device for sealing a drill hole and for discharging drillings or stripped extraction material |
| 03/14/2006 | US7011158 Method and apparatus for well bore cleaning |
| 03/14/2006 | US7011153 Hydraulically released inflation tool for permanent bridge plug |
| 03/14/2006 | CA2309674C Soil consolidation apparatus, tool and method |
| 03/14/2006 | CA2258783C Method for measurement of the airflow in rock drill bits as well as measurement means for accomplishing said method |
| 03/14/2006 | CA2239734C Fluid drilling system |
| 03/10/2006 | CA2499013A1 Drilling cutting analyzer system and methods of applications |
| 03/09/2006 | WO2006025746A1 A device for a pressure-compensated swivel |
| 03/09/2006 | US20060048935 Casing with isolated annular space |
| 03/08/2006 | EP1632640A1 Method and apparatus for filling a drill string with a drilling fluid |
| 03/08/2006 | CN2763496Y Oil layer protector for preventing flushing-flood pollution |
| 03/07/2006 | US7008907 blend of carboxylic acid terminated polyamide and/or wetting agent with reaction product or mixture produced by Diels-Alder reaction of dienophiles, preferably carboxylic acids, acid anhydrides, with fatty acids and resin acids; emulsion stability |
| 03/07/2006 | US7007753 Top drive swivel apparatus and method |
| 03/02/2006 | WO2006021750A1 Method of drilling a well at or under balance using a electrical submersible pump |
| 03/02/2006 | CA2578465A1 Method of drilling a well at or under balance using a electrical submersible pump |
| 03/01/2006 | EP1630347A1 Washpipe seal assembly |
| 03/01/2006 | EP1511914A4 Equalizer valve and method of use |
| 03/01/2006 | EP1414753B1 Method for regeneration of used halide fluids |
| 03/01/2006 | CN2761821Y Slurry, air filling blending device for low pressure well drilling |
| 03/01/2006 | CN2761820Y Hydraulic anchor |
| 02/28/2006 | US7004333 Process for the separation of hollow glass microspheres from muds containing them |
| 02/28/2006 | US7004259 Apparatus and method for facilitating the connection of tubulars using a top drive |
| 02/28/2006 | CA2307627C Mill for use in a wellbore and method of milling |
| 02/23/2006 | US20060037784 Valve method for drilling with casing using pressurized drilling fluid |
| 02/23/2006 | US20060037781 Drilling system and method |
| 02/22/2006 | EP1454028A4 Proppant recovery system |
| 02/21/2006 | US7001871 Water-based drilling fluid additive containing talc and graphite |
| 02/21/2006 | US7000776 Screen assembly for vibratory separators |
| 02/16/2006 | WO2006016137A1 Flow diverter |
| 02/16/2006 | WO2005122313A3 Method and apparatus for performing chemical treatments of exposed geological formations |
| 02/16/2006 | US20060032638 Apparatus and methods of setting and retrieving casing with drilling latch and bottom hole assembly |
| 02/16/2006 | US20060032634 Downhole surge pressure reduction and filtering apparatus |
| 02/16/2006 | US20060032095 Mobile vacuum boring and mud recovery method with the debris tank inclined & water storage below |
| 02/16/2006 | US20060032012 Mobile vacuum boring and mud recovery method having an articulated vacuum conduit boom with digging bucket |
| 02/15/2006 | EP1625281A1 Reverse circulation cementing process |
| 02/15/2006 | EP1481147B1 Methods of discovering and correcting subterranean formation integrity problems during drilling |
| 02/15/2006 | EP1274919B1 Top drive for casing connection |
| 02/15/2006 | CN2758475Y Radio transmission monitoring instrument for flow difference between filling and flowing out liquid during well drilling |
| 02/15/2006 | CN2758454Y Vacuum degassing unit |
| 02/15/2006 | CN2758453Y Light crow mounting well drilling slurry device |