| 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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| 08/25/2005 | US20050187114 Fracturing/conditioning subterranean formations; well completion; gravel pack fluids |
| 08/25/2005 | US20050183859 System and method for enhancing permeability of a subterranean zone at a horizontal well bore |
| 08/25/2005 | US20050183574 Systems and methods for storing and handling drill cuttings |
| 08/24/2005 | CN2720101Y Partial-pressure joint-production process pipe column |
| 08/24/2005 | CN2720094Y Well-washing vehicle for oil-field water-injection well |
| 08/23/2005 | US6932171 Ground drilling machine |
| 08/23/2005 | US6932169 System and method for developing and recycling drilling fluids |
| 08/23/2005 | US6932168 Method for making a well for removing fluid from a desired subterranean formation |
| 08/18/2005 | WO2005075790A1 Down hole fluid heating apparatus and method |
| 08/18/2005 | US20050178586 Downhole blowout preventor |
| 08/18/2005 | US20050178562 Method and apparatus for isolating and testing zones during reverse circulation drilling |
| 08/18/2005 | DE102004004615A1 Konsolidierungsmittel und dessen Verwendung zur Konsolidierung von Formkörpern und geologischen Formationen aus porösen oder partikulären Materialien Consolidating agent and its use for consolidating moldings and geological formations of porous or particulate materials |
| 08/17/2005 | EP1564367A1 Earth displacement drill |
| 08/17/2005 | EP1563162A1 Drilling fluid circulation system and method |
| 08/17/2005 | CN2718207Y Continuous washing sand circulating device |
| 08/17/2005 | CN1654780A Method for feeding drilling fluid with high gas content by using reciprocating drill pump |
| 08/16/2005 | US6929078 Apparatus for use in enlarging a borehole |
| 08/16/2005 | CA2359703C Method of releasing stuck pipe or tools and spotting fluids therefor |
| 08/16/2005 | CA2200076C Drill rod |
| 08/11/2005 | WO2005073500A1 System tank and output unit for transporting untreated drill cuttings |
| 08/11/2005 | WO2005073499A1 A collection device for drilling fluid |
| 08/11/2005 | WO2005073278A2 Consolidation agents and the use thereof for consolidating moulded bodies and geological formations consisting of porous or particulate materials |
| 08/11/2005 | WO2005042911A3 System for drilling oil and gas wells using oversized drill string to achieve increased annular return velocities |
| 08/11/2005 | US20050176590 Re-use of recovered treating fluid |
| 08/11/2005 | US20050173125 Apparatus for changing flowbore fluid temperature |
| 08/11/2005 | CA2496649A1 Method and apparatus for isolating and testing zones during reverse circulation drilling |
| 08/10/2005 | EP1561004A1 Apparatus for recycling of oil based drilling fluid contaminated with water. |
| 08/10/2005 | EP1183478B1 Fluid flow and pressure control system and method |
| 08/10/2005 | CN1213928C Device for transforting particles of magnetic material |
| 08/09/2005 | US6926101 System and method for treating drilling mud in oil and gas well drilling applications |
| 08/09/2005 | US6926081 Methods of discovering and correcting subterranean formation integrity problems during drilling |
| 08/09/2005 | CA2280713C Aphron-containing well drilling and servicing fluids |
| 08/04/2005 | US20050167157 Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
| 08/04/2005 | US20050167108 Openhole Perforating |
| 08/03/2005 | EP1559325A1 Brine container with filtering device |
| 08/03/2005 | EP1558833A2 Drilling mud filtration device |
| 08/03/2005 | EP1558831A2 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| 08/03/2005 | EP1165199B1 A method for the extraction of oil by microemulsification |
| 08/03/2005 | CN1650140A Drill cutting treatment method and apparatus |
| 08/03/2005 | CN1650090A System to reduce hydrostatic pressure in risers using buoyant spheres |
| 08/02/2005 | US6923871 Cleaning bore hole using high energy, low energy jets |
| 08/02/2005 | US6923275 Multi seam coal bed/methane dewatering and depressurizing production system |
| 08/02/2005 | US6923255 Activating ball assembly for use with a by-pass tool in a drill string |
| 08/02/2005 | CA2182788C Drill casing installation equipment with external friction reducing means |
| 07/28/2005 | US20050161376 Brine container with filter system |
| 07/28/2005 | US20050161262 Variable density treatment fluids and methods of using such fluids in subterranean formations |
| 07/28/2005 | US20050160947 Displacement of gelling additive to well bore; crosslinking; forming barrier |
| 07/28/2005 | DE10361080A1 Bohrvorrichtung Drilling device |
| 07/27/2005 | EP1556579A1 Automated method and system for recognizing well control events |
| 07/27/2005 | CN2713123Y Sand washing tool for down-the-hole sand prevention center tube |
| 07/27/2005 | CN1644871A Injection system for eliminating sucking pressure as coming out of hole |
| 07/26/2005 | US6920942 Method and apparatus for directly controlling pressure and position associated with an adjustable choke apparatus |
| 07/21/2005 | WO2005065364A2 Instrumented internal blowout preventer valve for measuring drill string drilling parameters |
| 07/21/2005 | US20050155757 Fluid collecting device |
| 07/20/2005 | EP1554461A1 Cement flow control tool |
| 07/20/2005 | EP1554460A1 Multi-cycle downhole apparatus |
| 07/20/2005 | EP1397579A4 Method, system and tool for reservoir evaluation and well testing during drilling operations |
| 07/20/2005 | CN1643233A Dynamic annular pressure control apparatus and method |
| 07/19/2005 | US6918440 Testing drill packer |
| 07/14/2005 | WO2005064112A1 Hydraulically releaseable inflation tool for permanent bridge plug |
| 07/14/2005 | WO2005062749A2 System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud |
| 07/14/2005 | US20050153844 Apparatus and process for removing liquids from drill cuttings |
| 07/14/2005 | US20050150659 Running a Completion Assembly Without Killing a Well |
| 07/14/2005 | US20050150381 Method and system for degassing a fluid |
| 07/14/2005 | CA2546364A1 Method and system for controlling power consumption during a rock drilling process and a rock drilling apparatus therefore |
| 07/13/2005 | EP1552104A1 System to reduce hydrostatic pressure in risers using buoyant spheres |
| 07/13/2005 | EP1552103A1 Drill head steering |
| 07/12/2005 | US6915846 Production tubing joint |
| 07/12/2005 | US6915815 Apparatus for storing and dispensing oil and gas well drilling fluids |
| 07/12/2005 | CA2041000C Transmission sleeve for a down hole hammer |
| 07/07/2005 | WO2005061843A1 Drilling device |
| 07/07/2005 | WO2005061651A1 Method of use and composition of pomace additive |
| 07/07/2005 | US20050145418 Oil contaminated substrate treatment method and apparatus |
| 07/06/2005 | CN1636106A Two string drilling system |
| 07/05/2005 | US6913092 Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling |
| 07/05/2005 | US6913080 Re-use recovered treating fluid |
| 07/05/2005 | CA2266693C Wellbore milling system |
| 06/30/2005 | WO2005040544A9 Internal blow out preventer ball and seat |
| 06/29/2005 | EP1356186B1 Closed loop fluid-handing system for well drilling |
| 06/29/2005 | CN1632278A Big tail pipe side drilling well cementing technology |
| 06/29/2005 | CN1632277A Permanent double layer well body structure for realizing gas well continuous circulation |
| 06/28/2005 | US6911417 For removing water from near-wellbore portion of subterranean formation when drilling for crude oil; well completion |
| 06/28/2005 | US6910542 Acoustic flow pulsing apparatus and method for drill string |
| 06/28/2005 | US6910531 Rotating drilling stripper |
| 06/28/2005 | US6910411 Drilling fluid recovery and cuttings processing system |
| 06/28/2005 | CA2240290C Drilling fluid loss prevention and lubrication additive |
| 06/23/2005 | WO2005056971A1 Method and apparatus for directional drilling |
| 06/23/2005 | US20050137114 environmentally friendly, biodegradable, nondepositing and high temperatures resistant aqueous foaming agents comprising a mixture of anionic, cationic and zwitterionic surfactants, used as drilling fluids |
| 06/23/2005 | US20050133217 Hyraulically releasable inflation tool for permanent bridge plug |
| 06/23/2005 | CA2457698A1 Environmental drilling fluid |
| 06/22/2005 | EP1544407A2 Underbalanced well completion |
| 06/22/2005 | EP1544405A2 Underbalanced well completion |
| 06/22/2005 | CN2705626Y Five cylinder mud pump |
| 06/22/2005 | CN2705585Y Pneumatic slurry mixer for drilling well |
| 06/22/2005 | CN1630618A Method for regeneration of used halide fluids |
| 06/16/2005 | WO2005054627A1 Method and system for extraction of resources from a subterranean well bore |
| 06/16/2005 | WO2005054625A1 Zeolite-containing remedial compositions |
| 06/16/2005 | WO2005054623A1 An apparatus and process for removing liquids from drill cuttings |
| 06/16/2005 | WO2004055317A3 Well bore cleaning and tubular circulating and flow-back apparatus |
| 06/16/2005 | WO2004033842A3 Method and apparatus for removing cuttings from a deviated wellbore |