| 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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| 02/22/2007 | WO2007021422A2 Triple valve blow out preventer |
| 02/22/2007 | WO2007021198A1 Device for conducting cementing operations and inflow regulation |
| 02/22/2007 | WO2005113935A3 Methods and apparatus for using formation property data |
| 02/22/2007 | US20070039735 Methods of sealing subterranean formations using rapid setting plugging compositions |
| 02/22/2007 | CA2618001A1 Device for conducting cementing operations and inflow regulation |
| 02/21/2007 | CN2871918Y Sand-washing oil pump |
| 02/21/2007 | CN2871811Y Treater of sand-washing fluid |
| 02/21/2007 | CN2871805Y Positive-punch and reverse-circulation sand-washing tool |
| 02/20/2007 | US7178610 controlling shale swelling in a subterranean formation by treating with the fluids |
| 02/20/2007 | US7178600 Apparatus and methods for utilizing a downhole deployment valve |
| 02/20/2007 | US7178594 Gravel packing a downhole area with a mixture including an alkoxylated fatty amine or polyalkyleneamine surfactant; emulsion can be converted from a water-in-oil to an oil-in-water type emulsion and back again upon protonation and deprotonation |
| 02/20/2007 | US7178592 Closed loop multiphase underbalanced drilling process |
| 02/20/2007 | CA2356930C An apparatus and method for facilitating the connection of tubulars using a top drive |
| 02/15/2007 | WO2006039665A3 Apparatus and method for well completion |
| 02/15/2007 | US20070034369 Controlling transient pressure conditions in a wellbore |
| 02/14/2007 | EP1752607A2 Washpipe assembly |
| 02/14/2007 | EP1751396A2 Method and apparatus for performing chemical treatments of exposed geological formations |
| 02/14/2007 | EP1751390A2 Apparatus and method for modified horizontal directional drilling assembly |
| 02/14/2007 | EP1751259A2 Treatment of hydrocarbon fluids with ozone |
| 02/14/2007 | CN2869286Y Adjustable oil well flushing device |
| 02/14/2007 | CN2869285Y Oil well flushing protector |
| 02/13/2007 | US7177016 Electronic surveying apparatus |
| 02/13/2007 | US7175716 By contacting with an extracting fluid near or above its criticalpoint; cleaning used oil, drilling fluid; decontaminating soil |
| 02/13/2007 | US7174975 Control systems and methods for active controlled bottomhole pressure systems |
| 02/08/2007 | WO2007016389A1 Apparatus and method to monitor slurries for waste re-injection |
| 02/08/2007 | WO2007016000A1 Active bottomhole pressure control with liner drilling and compeltion system |
| 02/08/2007 | US20070029092 Mono-trip cement thru completion |
| 02/07/2007 | CN2866797Y Mixer |
| 02/07/2007 | CN2866796Y Antisand sticking apparatus |
| 02/07/2007 | CN1908369A Underground liquid level monitoring system and its method |
| 02/06/2007 | US7173542 Data relay for casing mounted sensors, actuators and generators |
| 02/06/2007 | US7172703 Mixing the brine containing metal impurities with an organic chelant for a time sufficient for the chelant to complex a metal and form a complexed metal precipitate; removing complexed metal precipitate from brine wherein the metal impurities contain iron |
| 02/06/2007 | CA2223662C Method for determining drilling bit wear |
| 02/01/2007 | WO2007014010A1 Apparatus and methods for creation of down hole annular barrier |
| 02/01/2007 | WO2007012842A1 A shoe for wellbore lining tubin |
| 02/01/2007 | WO2005079224A3 Hydraulic impulse generator and frequency sweep mechanism for borehole applications |
| 02/01/2007 | US20070023205 Device for the overdrilling of underground lines |
| 02/01/2007 | CA2617498A1 Apparatus and methods for creation of down hole annular barrier |
| 01/31/2007 | CN2864077Y Oil field well washing engineering vehicle |
| 01/31/2007 | CN1903973A Fortified collapse proof well drilling liquid |
| 01/30/2007 | US7168569 Vibratory screening machine for earth drilling installation |
| 01/30/2007 | US7168493 Downhole tool |
| 01/30/2007 | US7168492 Wellbore annulus flushing valve |
| 01/30/2007 | CA2256382C Oil and gas well cuttings disposal system with continuous vacuum operation for sequentially filling disposal tanks |
| 01/25/2007 | WO2007010196A1 Equalizer valve assembly |
| 01/25/2007 | WO2007009231A1 Downhole drilling compositions and methods of preparation |
| 01/25/2007 | WO2006088826A3 Conserving components of fluids |
| 01/25/2007 | US20070017706 Methods of drilling and consolidating subterranean formation particulates |
| 01/25/2007 | CA2614516A1 Downhole drilling compositions and methods of preparation |
| 01/24/2007 | EP1745840A1 Apparatus and method for mixing a liquid material and a flowable powdery material to obtain a slurry |
| 01/24/2007 | EP1327051B1 Dual valve well control in underbalanced wells |
| 01/24/2007 | CN2861459Y Cleaning door in outside tank operation |
| 01/24/2007 | CN2861447Y Earthquake dry well drill |
| 01/24/2007 | CN1902012A Oil contaminated substrate treatment method and apparatus |
| 01/23/2007 | US7165634 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 01/23/2007 | CA2255065C Downhole apparatus |
| 01/23/2007 | CA2163404C Ester-containing lubricating composition, use of said composition and pit fluid containing the composition |
| 01/18/2007 | WO2006042338A3 Apparatus and method for increasing well production |
| 01/16/2007 | US7163063 Method and system for extraction of resources from a subterranean well bore |
| 01/16/2007 | US7163057 Completion apparatus and methods for use in hydrocarbon wells |
| 01/16/2007 | CA2278844C Downhole clutch with flow ports |
| 01/11/2007 | WO2007005321A2 Filter screen with molded end cap for oilfield screens |
| 01/11/2007 | WO2007003953A1 Mixing energy analysis of high-yielding non-newtonian fluids for severe lost circulation prevention |
| 01/11/2007 | WO2007003894A2 Wellbore cleaning method and apparatus |
| 01/11/2007 | US20070007044 Washpipe seal |
| 01/11/2007 | US20070007007 Method and apparatus for wellbore fluid treatment |
| 01/11/2007 | US20070007006 Mixing energy analysis of high-yielding non-newtonian fluids for severe lost circulation prevention |
| 01/11/2007 | DE202004020879U1 Fülleinrichtung zum Auffüllen von Bohrzügen mit Bohrflüssigkeit Filling device for filling Bohrzügen with drilling fluid |
| 01/11/2007 | CA2612092A1 Wellbore cleaning method and apparatus |
| 01/10/2007 | CN2856381Y Rotary inflator with two-wall pipe |
| 01/10/2007 | CN1891971A Fuel cell apparatus and method for downhole power systems |
| 01/09/2007 | US7160843 Oil-based demulsifying agent and its use in the treatment of drains bored in oil-based mud |
| 01/09/2007 | US7159669 Internal riser rotating control head |
| 01/09/2007 | CA2356471C Apparatus and method for facilitating the connection of tubulars using a top drive |
| 01/09/2007 | CA2260714C Wellbore fluid recovery systems & methods |
| 01/09/2007 | CA2241194C Determination of fluid influx or efflux |
| 01/09/2007 | CA2220115C Device for controlling the weight on an earth drill bit |
| 01/04/2007 | DE102005026918A1 Drilling fluid cleaning system has collection unit, two centrifuges with interior conveyor worms through which fluid is led, thinned and cleaned fluid is diverted and led back into entrance to first centrifuge |
| 01/04/2007 | CA2631974A1 Metal debris cleanout system and method |
| 01/04/2007 | CA2512437A1 Method of controlling a well |
| 01/03/2007 | EP1739278A2 Reverse circulation cementing process |
| 01/03/2007 | CN2854058Y Drilling mud, gas separator |
| 01/03/2007 | CN1890452A Method and system for controlling power consumption during a rock drilling process and a rock drilling apparatus therefore |
| 01/02/2007 | US7158886 Automatic control system and method for bottom hole pressure in the underbalance drilling |
| 01/02/2007 | US7156194 Methods of drilling and consolidating subterranean formation particulate |
| 01/02/2007 | US7156193 Continuous positive flow backflash prevention system |
| 12/30/2006 | CA2513166A1 Method of monitoring gas influx into a well bore when drilling an oil and gas well, and apparatus constructed in accordance with the method |
| 12/28/2006 | WO2006138565A1 Active controlled bottomhole pressure system and method with continuous circulation system |
| 12/28/2006 | WO2006136800A1 An improved treatment of drill cuttings |
| 12/28/2006 | US20060289154 Top drive swivel apparatus and method |
| 12/28/2006 | CA2612111A1 Active controlled bottomhole pressure system and method with continuous circulation system |
| 12/27/2006 | EP1735520A2 Improvements in or relating to rock drilling equipment |
| 12/27/2006 | EP1664478B1 Drilling system and method |
| 12/27/2006 | EP1554460B1 Multi-cycle downhole apparatus |
| 12/27/2006 | CN2851532Y Hand-held type air-conducting faucet |
| 12/27/2006 | CN2851531Y Well-cleaning protection device for oil well |
| 12/26/2006 | US7152697 Stabilizing with amine surfactant primarily in unprotonated form; charging with such as ethylene diamine tetraacetic acid |
| 12/21/2006 | WO2006135787A1 Casing and drill pipe filling and circulation apparatus |
| 12/21/2006 | WO2006134446A2 Novel activating mechanism for controlling the operation of a downhole tool |
| 12/21/2006 | WO2006133826A1 Device and procedure for the insertion of a new drilling string-element into the drill-string of a well |