| 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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| 09/11/2009 | CA2716023A1 Equivalent circulating density control in deep water drilling |
| 09/10/2009 | US20090223717 Forced balanced system |
| 09/10/2009 | US20090223676 Selective Agitation |
| 09/10/2009 | US20090223666 Top drive swivel apparatus and method |
| 09/09/2009 | EP2097612A1 Method and apparatus for vacuum collecting and gravity depositing drill cuttings |
| 09/09/2009 | EP1604093B1 Method and apparatus for drilling a borehole with a borehole liner |
| 09/09/2009 | EP1558831B1 Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| 09/09/2009 | CN201306140Y Valve type float valve |
| 09/09/2009 | CN100537999C Foam negative pressure mixed discharging plug removal method |
| 09/08/2009 | US7584801 Drill string flow control valves and methods |
| 09/08/2009 | US7584794 Mechanical and fluid jet horizontal drilling method and apparatus |
| 09/08/2009 | CA2549128C Zeolite-containing remedial compositions |
| 09/08/2009 | CA2399557C Shale hydration inhibition agent and method of use |
| 09/08/2009 | CA2340450C Shale-stabilizing additives |
| 09/08/2009 | CA2171004C Foamed drilling fluids, their process for preparation and the corresponding drilling method |
| 09/03/2009 | US20090220324 Drill cuttings storage and conveying |
| 09/03/2009 | US20090218145 Method and apparatus for removing metal cuttings from an oil well drilling mud stream |
| 09/02/2009 | EP2094937A2 Method and apparatus for processing and injecting drill cuttings |
| 09/02/2009 | EP2094933A1 Device for percussion drilling or rotary percussion drilling in rocky material |
| 09/02/2009 | CN100535380C Dynamic annular pressure control apparatus and method |
| 09/01/2009 | US7581601 Drill cuttings re-injection system |
| 09/01/2009 | CA2488092C Method of formulating and using a drilling mud with fragile gels |
| 08/28/2009 | CA2627102A1 Fluid and method for agglomerating particles in a well service operation |
| 08/27/2009 | WO2009105032A1 A vessel for storing fluids and a method for containment of fluids onboard a vessel |
| 08/27/2009 | WO2009103629A1 Method and device for casing a bored well portion |
| 08/27/2009 | US20090211748 Device for Conducting Cementing Operations and Inflow Regulation |
| 08/27/2009 | US20090211106 Treatment of Drill Cuttings |
| 08/27/2009 | CA2716018A1 Method of estimating well disposal capacity |
| 08/26/2009 | EP2092971A1 Apparatus for screening drilling mud |
| 08/26/2009 | EP2091673A2 Electromagnetic treatment of contaminated materials |
| 08/26/2009 | CN201297144Y Device for flushing pumping well |
| 08/26/2009 | CN101514619A Novel direct circulation well cementing device and well cementing method for high-pressure gas underground gas storage well |
| 08/26/2009 | CN101514611A Two-way rotating fluid guiding device |
| 08/26/2009 | CN100532780C Drilling system and method |
| 08/25/2009 | US7578968 Effecting biocidal activity in aqueous well fluid by blending with the fluid a biocidally-effective amount of a sulfamate stabilized, bromine-based biocide formed from a halogen source which is bromine chloride, bromine and chlorine, a source of sulfamate anions, alkali metal base, and water |
| 08/25/2009 | CA2340267C Organophilic clay additives and oil well drilling fluids with less temperature dependent rheological properties containing said additives |
| 08/20/2009 | WO2009102735A2 Downhole washout detection system and method |
| 08/20/2009 | WO2009102703A2 Self adjusting debris excluder sub |
| 08/20/2009 | WO2009102578A2 Method and system of monitoring rotational time of rotatable equipment |
| 08/20/2009 | WO2009101424A2 Flow stop valve |
| 08/20/2009 | WO2009062041A3 Automated electrical stability meter |
| 08/20/2009 | US20090205872 Air Injection Collar |
| 08/20/2009 | US20090205871 Shot Blocking Using Drilling Mud |
| 08/20/2009 | US20090205838 Wellbore continuous circulation systems |
| 08/20/2009 | US20090205837 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/20/2009 | US20090205836 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/20/2009 | US20090205827 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/20/2009 | DE102008009369A1 Production of compositions of functional components such as thermoplastics, enzymes, oils or hair- or skin-care substances, involves using a n-nonyl ester as additive, e.g. as release agent or foam suppressant |
| 08/20/2009 | DE102008009368A1 Producing organic composition, useful e.g. as additive in drilling fluid, comprises mixing n-nonyl ether obtained by reacting n-nonyl alcohol-component with e.g. polyether alcohol, functional component e.g. enzyme and further additive |
| 08/20/2009 | CA2715904A1 Self adjusting debris excluder sub |
| 08/20/2009 | CA2714768A1 Flow stop valve |
| 08/20/2009 | CA2714652A1 Downhole washout detection system and method |
| 08/20/2009 | CA2712580A1 Method and system of monitoring rotational time of rotatable equipment |
| 08/19/2009 | EP2089606A1 Device for drilling into rock material |
| 08/19/2009 | EP1337306B8 A screen assembly for a vibratory separator |
| 08/19/2009 | CN201292791Y Under balance drilling gas injection connector |
| 08/19/2009 | CA2654613A1 Drilling cutting analyzer system and methods of applications |
| 08/18/2009 | US7575073 Separation of evolved gases from drilling fluids in a drilling operation |
| 08/18/2009 | US7575072 Method and apparatus for processing and injecting drill cuttings |
| 08/18/2009 | US7575069 Mobile soil sampling device with vacuum collector |
| 08/13/2009 | WO2009099730A1 Vacuum feed supply system for drilling fluid additives |
| 08/13/2009 | WO2009098482A1 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/13/2009 | WO2009098478A2 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/13/2009 | WO2009098474A1 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/13/2009 | WO2009098473A2 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/13/2009 | US20090200083 Method and Apparatus for Processing and Injecting Drill Cuttings |
| 08/13/2009 | US20090200079 Downhole washout detection system and method |
| 08/13/2009 | US20090200078 Method of drilling a well at or under balance using a electrical submersible pump |
| 08/13/2009 | US20090200038 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/13/2009 | US20090199618 Device for extracting at least one gas contained in a drilling mud and associated analysis assembly |
| 08/13/2009 | CA2715073A1 Hydraulic connector apparatuses and methods of use with downhole tubulars |
| 08/12/2009 | EP2087197A1 Assembly for pressure control when drilling and method to control pressure when drilling in a formation with unpredictable high formation pressure |
| 08/12/2009 | CN101506464A Method and apparatus for preparing drill cuttings for reinjection into a well |
| 08/12/2009 | CN101505882A A screen assembly for a vibratory separator |
| 08/12/2009 | CN101505881A Apparatus and method for separating solids from solids laden drilling mud |
| 08/12/2009 | CN100526596C Movable type well-flushing truck pipe controller |
| 08/11/2009 | US7572755 Drilling fluid comprising a vinyl neodecanoate polymer and method for enhanced suspension |
| 08/11/2009 | CA2653373A1 Compositions and methods for gas and oil well treatment |
| 08/06/2009 | WO2009096798A1 An apparatus and method for filling and emptying a drill cuttings receptacle |
| 08/06/2009 | WO2009073438A3 Breaker fluids and methods of using the same |
| 08/06/2009 | WO2009058706A4 Anchored riserless mud return systems |
| 08/06/2009 | US20090194338 Method and apparatus for cementing drill strings in place for one pass drilling and completion of oil and gas wells |
| 08/06/2009 | US20090194331 Vacuum feed supply system for drilling fluid additives |
| 08/06/2009 | DE102008007169A1 Mine for use with equipment for use as power plant, power plant requirement or pump water power plant, has water pipeline system and water reservoir for water retention for water supply for electricity production by hydraulic power |
| 08/05/2009 | EP2084364A2 Internal pipe slot tool |
| 08/05/2009 | EP1853367B1 Vibratory separator and method for separating solids from a solids laden drilling fluid |
| 08/05/2009 | EP1497530B1 Method for increasing production from a wellbore |
| 08/05/2009 | CN201284636Y Circulating foam simulation experiment apparatus |
| 08/05/2009 | CN101498199A Controllable liquid injection pipe and controllable liquid injection method convenient for downhole and uplifting |
| 08/05/2009 | CN100523689C Drill cutting treatment method and apparatus |
| 08/04/2009 | US7568535 Methods for recovery and reuse of lost circulation material |
| 08/04/2009 | CA2492809C System to reduce hydrostatic pressure in risers using buoyant spheres |
| 07/30/2009 | WO2009094066A2 Method and system for fracturing subsurface formations during the drilling thereof |
| 07/30/2009 | WO2009093069A2 Method and apparatus for facilitating continuous circulation of drilling mud during construction and maintenance of a well |
| 07/30/2009 | US20090188721 Membrane method of making drilling fluids containing microbubbles |
| 07/30/2009 | CA2710564A1 Method and apparatus for facilitating continuous circulation of drilling mud during construction and maintenance of a well |
| 07/29/2009 | EP2081702A1 Method and apparatus for processing oil drilling waste |
| 07/29/2009 | CN201280902Y Duster of drill |
| 07/29/2009 | CN201280901Y Liquid-gas separator foundation for offshore pressure control well drilling |
| 07/28/2009 | CA2593440C Apparatus and method for locating joints in coiled tubing operations |