| Patents for E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells (2,021) |
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| 02/03/2015 | US8944190 System and method for damping vibration in a drill string |
| 01/14/2015 | CN102213772B 用于井配置和储集层特性的设备以及系统 Wells used to configure and reservoir properties of equipment and systems |
| 01/13/2015 | US8933699 Apparatus and system for well placement and reservoir characterization |
| 08/20/2014 | EP2767350A1 Apparatus for sieving and fluid separation and a method of using same |
| 08/14/2014 | US20140224537 System and method for damping vibration in a drill string |
| 06/10/2014 | US8746460 Apparatus for sieving and fluid separation and a method of using same |
| 06/10/2014 | CA2569090C System for delivery of a tracer in fluid transport systems and use thereof |
| 05/20/2014 | US8726992 Method and device for filling a void incompletely filled by a cast material |
| 05/20/2014 | CA2671526C Controlling transient pressure conditions in a wellbore |
| 04/01/2014 | CA2571190C A method of filtering pump noise |
| 04/01/2014 | CA2511788C Apparatus and system for well placement and reservoir characterization |
| 03/04/2014 | US8662205 System and method for damping vibration in a drill string |
| 01/29/2014 | EP1794407B1 Bend stiffener |
| 12/31/2013 | CA2588840C A method and device for fluid displacement |
| 12/17/2013 | CA2582258C Drilling unit |
| 12/10/2013 | CA2597469C Method and equipment for the reduction of multiple dispersions |
| 11/12/2013 | CA2613043C Apparatus for sieving and fluid separation and a method of using same |
| 10/29/2013 | US8567356 Drill rig and method for controlling a fan therein |
| 10/23/2013 | EP2652235A1 Electrical methods fracture detection via 4d techniques |
| 10/22/2013 | CA2576897C Sleeve arrangement |
| 10/22/2013 | CA2576893C Housing arrangement |
| 09/04/2013 | CN101970598B Treatment fluids comprising clarified xanthan and associated methods |
| 08/20/2013 | CA2583169C Arrangement and method for controlling drilling parameters |
| 08/20/2013 | CA2559140C A method and device for establishing an underground well |
| 08/06/2013 | US8499843 System and method to seal using a swellable material |
| 07/30/2013 | CA2694151C Treatment fluids comprising clarified xanthan and associated methods |
| 07/23/2013 | CA2575711C A drill rig and a method for controlling a fan therein |
| 07/02/2013 | US8474253 Pressure accumulator to establish sufficient power to handle and operate external equipment and use thereof |
| 06/11/2013 | CA2677756C Arctic platform |
| 05/22/2013 | CN101052779B Device for a drilling tool |
| 05/01/2013 | CN1800578B Apparatus and method for formation evaluation |
| 04/09/2013 | CA2590505C A system for handling pipes between a pipe rack and a derrick, and also a device for assembling and disassembling pipe stands |
| 04/03/2013 | CN101365859B Method and device for positioning a power tong at a pipe joint |
| 03/27/2013 | CN101023240B 岩石钻头 Rock drill |
| 03/19/2013 | CA2580082C Rock drilling device |
| 03/12/2013 | CA2672866C Arctic platform |
| 03/07/2013 | US20130056283 System and Method for Vibration in a Drill String |
| 03/06/2013 | CN101892839B Method for formation evaluation |
| 03/05/2013 | CA2500520C System and method to seal using a swellable material |
| 02/26/2013 | CA2571595C A drill bit |
| 02/19/2013 | CA2525850C Method for drilling with improved fluid collection pattern |
| 02/12/2013 | CA2585564C Rock drill bit |
| 01/30/2013 | CN101253308B User interface for rock drilling rig |
| 01/29/2013 | CA2658870C Performing in-situ, downhole analysis of properties of an unknown formation fluid based on in-situ analysis of like properties of a known fluid |
| 01/29/2013 | CA2569323C Rock drilling rig, service platform connected to a rock drilling rig and a roof for a service platform |
| 01/22/2013 | CA2782859C Rotating pressure control head |
| 01/22/2013 | CA2513974C Rotating pressure control head |
| 01/15/2013 | CA2576681C Rock drill bit |
| 01/15/2013 | CA2502165C Bottom hole assembly |
| 01/08/2013 | US8347963 Controlling transient underbalance in a wellbore |
| 01/08/2013 | CA2561894C Method and system for collaring |
| 01/08/2013 | CA2556430C Clamping apparatus, drill string component and rock drilling rig |
| 01/08/2013 | CA2467381C Mono diameter wellbore casing |
| 12/18/2012 | US8333245 Accelerated production of gas from a subterranean zone |
| 12/18/2012 | CA2612983C Arrangement for positioning rock drilling rig on drilling site |
| 12/18/2012 | CA2576138C Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 12/13/2012 | WO2005028803A3 Expandable tubular |
| 12/12/2012 | CN102817574A Packer-anchoring device |
| 12/04/2012 | CA2684406C Charge holder apparatus |
| 11/27/2012 | CA2499525C Casing brush assembly |
| 11/21/2012 | CN1930363B Clamping apparatus, drill string component and rock drilling rig |
| 11/20/2012 | CA2684410C Charge holder apparatus |
| 11/20/2012 | CA2499532C Casing scraper |
| 11/14/2012 | CN101253471B Adaptive user interface for rock drilling rig |
| 11/14/2012 | CN101171399B Packer-anchoring device |
| 11/13/2012 | CA2677755C Arctic platform |
| 11/13/2012 | CA2521151C Apparatus and methods for conveying and operating analytical instrumentation within a well borehole |
| 10/16/2012 | US8286726 User interface for rock drilling rig |
| 10/09/2012 | US8281877 Method and apparatus for drilling with casing |
| 10/09/2012 | CA2630787C Method and device for positioning a power tong at a pipe joint |
| 09/25/2012 | CA2666180C Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 09/18/2012 | CA2629384C Flow divider and separation system |
| 09/18/2012 | CA2581325C Method for breaking rock |
| 09/11/2012 | CA2531641C Impact device and method for generating stress pulse therein |
| 09/05/2012 | CN101365861B Drill fluid collecting device |
| 08/22/2012 | CN1846128B An apparatus and a method of visulazing target objects in a fluid-carrying pipe |
| 08/15/2012 | EP2486215A2 Solid core glass bead seal with stiffening rib |
| 08/15/2012 | CN101994487B Torsion bearing assembly for transferring torque to drill |
| 08/14/2012 | US8240401 System and method for damping vibration in a drill string |
| 08/07/2012 | US8235123 Separating device |
| 08/07/2012 | CA2623625C Method and rock drilling rig for hole drilling |
| 08/07/2012 | CA2499007C Bottom plug for forming a mono diameter wellbore casing |
| 07/24/2012 | US8226326 Arctic platform |
| 07/17/2012 | CA2555717C Method for operating an actuator and an actuator device for use in drainage pipe used for producing oil and/or gas |
| 07/10/2012 | US8215389 Apparatus and method for formation evaluation |
| 07/10/2012 | CA2505252C Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| 07/03/2012 | CA2619062C User interface for rock drilling rig |
| 06/27/2012 | CN101080548B A method and a device for sealing a void incompletely filled with a cast material |
| 06/13/2012 | CN1930361B A method and operation device for establishing a drilling of an underground well, and arranging dilatable shell or sand sieve and well completion pipe in the drilling |
| 05/29/2012 | CA2681868C Riser rotating control device |
| 05/24/2012 | US20120124934 Arctic Platform |
| 05/22/2012 | CA2615679C Pressure accumulator to establish sufficient power to handle and operate external equipment, and use thereof |
| 05/15/2012 | CA2634472C Downhole measurement system and method |
| 05/15/2012 | CA2499159C Downhole rate of penetration sensor assembly and method |
| 04/18/2012 | CN101864933B Method for reducing pressure in a perforating gun |
| 04/10/2012 | US8151901 Impact device and method for generating stress pulse therein |
| 03/27/2012 | US8141626 Packer-anchoring device |
| 03/27/2012 | CA2496162C Wellbore drilling system and method |
| 03/27/2012 | CA2488830C Lift system |
| 03/21/2012 | EP2431564A1 Method for drilling and completing wells |