| 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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| 12/17/2011 | CA2719816A1 Method and apparatus for speciating hydrocarbons and for liberating gases from drilling fluid |
| 12/15/2011 | WO2011154170A1 Method and apparatus for determining the local spatial extent of the phase of valuable mineral in a rock |
| 12/15/2011 | WO2011154169A1 Method and apparatus for increasing the yield of a deposit |
| 12/15/2011 | WO2011154168A1 Method and apparatus for increasing the yield in a deposit |
| 12/15/2011 | WO2011153607A1 Debris filtering apparatus and method |
| 12/15/2011 | WO2011114288A3 Ore processing panel |
| 12/15/2011 | US20110303462 Annulus pressure setpoint correction using real time pressure while drilling measurements |
| 12/15/2011 | CA2801788A1 Rotating flow control diverter |
| 12/15/2011 | CA2801630A1 Method and apparatus for determining the local spatial extent of the phase of valuable mineral in a rock |
| 12/15/2011 | CA2797722A1 Debris filtering apparatus and method |
| 12/14/2011 | EP2395352A1 Method and device for determining the local extension of mineral material in a rock |
| 12/14/2011 | EP2394018A1 Landing string assembly |
| 12/14/2011 | CN202073517U 一种用于正反冲砂的地面换向装置 Ground for pros washed sand commutation device |
| 12/14/2011 | CN202073516U 配水间集中吐水自控装置 Centralized water distribution between water spit-controlled device |
| 12/14/2011 | CN202073515U 一种钻机集尘器 One kind of rig dust collector |
| 12/14/2011 | CN202073501U 落地式室内天棚混凝土板底钻孔机构 Floor-to-ceiling interior concrete slab bottom drilling agency |
| 12/14/2011 | CN102282335A 从地下的含烃地层中采收烃的方法 Harvested from underground hydrocarbon formation hydrocarbons |
| 12/14/2011 | CN102278068A 一种处理气体钻井过程中地层出水的方法 A gas drilling method of formation water treatment |
| 12/14/2011 | CN101310089B 用于将微粒供入流中的设备和方法 For microparticles for inflow devices and methods |
| 12/14/2011 | CA2706803A1 Portable materials handling apparatus |
| 12/13/2011 | US8074738 Offshore thermal treatment of drill cuttings fed from a bulk transfer system |
| 12/13/2011 | US8074717 Drilling method and downhole cleaning tool |
| 12/13/2011 | US8074681 Swivel and rotator mechanism for fluid controlled machines |
| 12/13/2011 | CA2624751C Apparatus and method for controlling the viscosity or the density of a drilling fluid |
| 12/08/2011 | WO2011153098A1 Liner hanger fluid diverter tool and related methods |
| 12/07/2011 | EP2392772A1 Method and device for increasing the yield from a mineral deposit |
| 12/07/2011 | EP2392768A1 Method and device for increasing the yield from a mineral deposit |
| 12/07/2011 | EP2391443A2 Centrifugal mixing system |
| 12/07/2011 | CN202064864U 泥浆净化一体化模块 Mud purification integrated module |
| 12/07/2011 | CN202064863U 固井前置冲洗液评价仪 Pre-rinse cementing Evaluation Tool |
| 12/07/2011 | CN202064862U 不动井口连续冲砂装置 Fixed wellhead continuous sand washing equipment |
| 12/07/2011 | CN102272411A 钻杆 Drill |
| 12/07/2011 | CN102272410A 用来在钻探期间确定地层完整性和最佳钻探参数的方法 Used to determine the stratigraphic integrity and optimum drilling parameters during drilling method |
| 12/07/2011 | CN102268963A Basement rock fractured formation mixed drilling well completion process |
| 12/06/2011 | US8071509 Glycerol based drilling fluids |
| 12/06/2011 | CA2677489C High performance foams for unloading gas wells |
| 12/06/2011 | CA2586824C Drill cutting sampler |
| 12/01/2011 | WO2011149904A1 Large bore auto-fill float equipment |
| 12/01/2011 | WO2011149806A2 Method for circulating a fluid entry entry out of a subsurface wellbore without shutting in the wellbore |
| 11/30/2011 | EP2389496A2 Apparatus for a pipe string of a geological drill hole, pipe string, method for operating a geological drilling gear and method for producing a pipe string for a geological drill hole |
| 11/30/2011 | CN202055801U 采油井口组合装置 Wellhead combination device |
| 11/30/2011 | CN202055783U 钻井钻屑随钻清洁设备 Drill cuttings while drilling Cleaning Equipment |
| 11/30/2011 | CN202055782U 一种钻井液真空加料机 One kind of drilling fluid vacuum feeder |
| 11/30/2011 | CN102261228A 一种油田油井快速正反交替循环冲洗阀 One kind of positive and negative cycles in oil wells quick flush valve |
| 11/29/2011 | US8066086 Sleeve arrangement |
| 11/29/2011 | US8066079 Drill string flow control valves and methods |
| 11/29/2011 | US8066069 Method and apparatus for wellbore construction and completion |
| 11/29/2011 | CA2517420C Method and composition for injection at a tunnel boring machine |
| 11/27/2011 | CA2736935A1 Method and apparatus for removing metallic matter from an oil well circulating completion fluid stream |
| 11/24/2011 | WO2011146251A1 Dual-pole magnetic attraction downhole magnetic retrieval apparatus |
| 11/24/2011 | WO2011144807A1 Drilling device for earth drilling |
| 11/24/2011 | WO2011143776A1 Vertical axis centrifugal separator |
| 11/24/2011 | WO2011123617A3 Improved mud saver valve and method of operation of same |
| 11/24/2011 | WO2011112772A3 System and method for separating solids from fluids |
| 11/24/2011 | WO2011112445A3 Oil-based drilling fluid recovery and reuse |
| 11/24/2011 | WO2011103570A3 Reverse circulation apparatus and methods for using same |
| 11/24/2011 | WO2011058031A3 System and method for drilling a subsea well |
| 11/24/2011 | US20110284481 System and method for drying drill cuttings |
| 11/24/2011 | US20110284290 Method for drilling through nuisance hydrocarbon bearing formations |
| 11/24/2011 | DE102010010036B4 Bohrvorrichtung mit Dichtungsanordnung und Verfahren zum Betrieb einer Bohrantriebseinheit Drilling assembly with sealing assembly and method for operating a Bohrantriebseinheit |
| 11/24/2011 | CA2799752A1 Method for drilling through nuisance hydrocarbon formations |
| 11/23/2011 | EP1778813B1 Under-neutralized alkylxylene sulfonic acid composition for enhanced oil recovery processes |
| 11/23/2011 | CN202047784U Packer |
| 11/23/2011 | CN202047768U Spring overpressure protection joint |
| 11/23/2011 | CN202047767U Drilling waste liquid treatment device |
| 11/23/2011 | CN202047766U Destabilization agitation tank for carrying out while-drilling treatment on drilling waste liquid |
| 11/23/2011 | CN202047765U Continuous settler for treating waste liquor of drilling well |
| 11/23/2011 | CN102251752A Petroleum drilling decompression first and then pressurization well control process |
| 11/23/2011 | CN102251743A Percussion revolution drilling method |
| 11/22/2011 | US8061426 System and method for lateral wellbore entry, debris removal, and wellbore cleaning |
| 11/22/2011 | CA2616188C Apparatus and method to monitor slurries for waste re-injection |
| 11/17/2011 | WO2011142894A1 High pressure shear nozzle for inline conditioning of drilling mud |
| 11/17/2011 | WO2011140635A2 Systems and methods for drying drill cuttings |
| 11/17/2011 | WO2011119728A3 System, assembly and method for port control |
| 11/17/2011 | WO2011119448A3 Remotely operated isolation valve |
| 11/17/2011 | WO2009085603A3 Controller for hydraulically operated downhole tool |
| 11/17/2011 | US20110278014 External Jet Pump for Dual Gradient Drilling |
| 11/17/2011 | CA2799405A1 Systems and methods for drying drill cuttings |
| 11/16/2011 | CN202039828U Water amount control device for water injection well |
| 11/16/2011 | CN202039802U Dry-type drilling and dust removing device |
| 11/16/2011 | CN202039801U Compression-injection type wind-powered slagging hole packer |
| 11/16/2011 | CN202039800U Waste mud regeneration preparation device |
| 11/16/2011 | CN202039799U Dust cover for drilling |
| 11/16/2011 | CN202039769U Crushing mechanism with air inlet pipe |
| 11/16/2011 | CN102242621A Negative pressure de-plugging and oil extraction process and device |
| 11/16/2011 | CN102242606A Hydraulic pressurizer |
| 11/16/2011 | CN101094965B Apparatus and method for guiding pipe |
| 11/15/2011 | CA2671282C Controlling transient pressure conditions in a wellbore |
| 11/15/2011 | CA2654639C Surfactant materials and coatings for weighting agents for use in oil based drilling fluids |
| 11/14/2011 | CA2704274A1 Sample washer for drilling cuttings |
| 11/10/2011 | WO2011140238A2 Modular bellows with instrumentation umbilical conduit for electrical submersible pump system |
| 11/10/2011 | WO2011139298A1 Asymmetric planetary drive assembly for use in shakers |
| 11/10/2011 | WO2011138589A2 High pressure manifold trailer and methods and systems employing the same |
| 11/10/2011 | US20110272139 System for drilling a wellbore |
| 11/09/2011 | CN202031803U Base liquid pump unit for gas drilling |
| 11/09/2011 | CN202031534U Downhole rotational-flow shearing generator |
| 11/09/2011 | CN202031530U Compressed washable well packer |
| 11/09/2011 | CN202031528U Step-by-step releasable packer |
| 11/09/2011 | CN202031508U Oil, gas and water thee-phase flow mixing device |
| 11/09/2011 | CN202031507U Check valve applicable to air reverse circulation drilling |