| Patents for E21B 25 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors (2,102) |
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| 07/05/2012 | WO2012088578A1 Box arrangement for packaging core samples |
| 06/27/2012 | EP2467563A1 System for monitoring coring operations |
| 06/14/2012 | US20120145461 Coring apparatus with sensors |
| 06/14/2012 | US20120145457 System for monitoring coring operations |
| 06/13/2012 | CN202273623U 一种深孔复杂地层大直径长半合管提钻取心钻具 One kind of deep complex formation of large diameter pipe length hemizygous mention drill core drill |
| 06/13/2012 | CN102498260A Core drill and coring method |
| 06/13/2012 | CN101315023B Selection type coring apparatus |
| 06/06/2012 | EP2459839A1 Core drill and coring method |
| 06/06/2012 | CN202266217U Heat-preserving and pressure-maintaining coring tool |
| 06/06/2012 | CN202266199U Hydraulic inner barrel lifting sub |
| 05/31/2012 | WO2012069036A1 Method for measuring drilled cores |
| 05/30/2012 | CN202249873U Strong self-locking core extractor |
| 05/30/2012 | CN202249872U Internal and external barrel lifting short piece of coring tool |
| 05/30/2012 | CN202249871U Rock core transferring basket of aluminium alloy inner barrel coring tool |
| 05/30/2012 | CN202249870U Wire line coring internal pipe balance weight device |
| 05/30/2012 | CN202249869U Two-stage single-moving coupling-pipe drilling tool |
| 05/30/2012 | CN202249754U Pneumatic down hole hammer with drilling and coring device |
| 05/30/2012 | CN102482925A Core barrel and related drilling apparatus and method |
| 05/30/2012 | CN102482920A 用于钻井装置的锁紧装置 Drilling device for locking device |
| 05/30/2012 | CN101761317B Rock sample core taking fixture |
| 05/24/2012 | WO2012065970A2 Method for continuous formation core sampling |
| 05/24/2012 | CA2817269A1 Method for continuous formation core sampling |
| 05/16/2012 | EP2452038A2 Core barrel and related drilling apparatus and method |
| 05/15/2012 | CA2721292A1 Core barrel assembly |
| 05/10/2012 | US20120111635 Sample Encapsulation and Cache Device and Methods |
| 05/09/2012 | CN102444388A Rock core leakage prevention device at lower end port of core taking lining pipe of rotary type incompetent bed drill |
| 05/09/2012 | CN101037859B Double-tubes single-action valve type coring earth borrowing device |
| 05/03/2012 | WO2012057910A2 Methods of using nano-particles in wellbore operations |
| 05/02/2012 | CN202209156U Coring tool with circular grooves on knife back |
| 05/02/2012 | CN102434106A Stratum core bit and stratum core drilling tool |
| 04/25/2012 | CN102425387A 一种硬岩取芯机构及桩工设备 One kind of hard rock core institutions and pile driving equipment |
| 04/25/2012 | CN102425378A Threaded drill bit with sliding chutes |
| 04/24/2012 | US8162080 Apparatus and methods for continuous coring |
| 04/19/2012 | WO2011153149A3 Core barrel restraint |
| 04/18/2012 | CN202194603U 鹅卵石取芯钻具 Cobblestone coring drill |
| 04/18/2012 | CN202194564U 一种可以应用于绳索取心钻进的涡轮钻具 One kind can be applied to the rope coring drilling turbodrill |
| 04/18/2012 | CN102418488A 一种绳索取心钻具 One kind of rope coring drill |
| 04/04/2012 | CN202181867U Self-locking core gripper with clamping band |
| 04/04/2012 | CN102400654A 岩心打捞器 Core fisher |
| 04/04/2012 | CA2755028A1 Method and apparatus for sonic drilling |
| 04/03/2012 | US8146684 Coring apparatus with sensors |
| 03/29/2012 | US20120074722 Head Assembly |
| 03/29/2012 | US20120073875 Slide-type core retainer for sample collector |
| 03/20/2012 | US8140259 Location device with a gravity measuring device |
| 03/20/2012 | CA2486866C Inner core barrel head assembly for core tube within a drill string |
| 03/15/2012 | US20120061147 Coring Tool and Method |
| 03/15/2012 | US20120061146 Impregnated drill bits with integrated reamers |
| 03/08/2012 | WO2012027817A1 Quickly reconfigurable core barrel head assembly |
| 03/08/2012 | CA2806769A1 Quickly reconfigurable core barrel head assembly |
| 02/29/2012 | CN101644141B Gas distributary joint suitable for gas drilling coring tool |
| 02/22/2012 | CN101302922B 水平定向钻穿越砂卵砾石地层的施工方法 Horizontal directional drilling construction methods sand gravel formations |
| 02/16/2012 | US20120037427 Drilling System for Enhanced Coring and Method |
| 02/16/2012 | US20120037421 Modular core orientation system |
| 02/15/2012 | EP2417323A1 Locking device for a drilling device |
| 02/09/2012 | US20120031681 Downhole tool housing |
| 02/08/2012 | EP2414632A1 A method for the collection of samples of soil and a vehicle intended to be used with the method |
| 02/08/2012 | CN202140055U 岩心提断机构 Core put off mechanism |
| 02/07/2012 | US8109347 Core catcher and corer having it |
| 02/02/2012 | WO2012012839A1 Core sample orientation system, device and method |
| 02/02/2012 | CA2806885A1 Core sample orientation system, device and method |
| 01/26/2012 | WO2012012006A1 Small core generation and analysis at-bit as lwd tool |
| 01/26/2012 | US20120018220 Core sample orientation |
| 01/26/2012 | CA2805460A1 Small core generation and analysis at-bit as lwd tool |
| 01/19/2012 | US20120012393 Small Core Generation and Analysis At-Bit as LWD Tool |
| 01/18/2012 | CN102322233A Cobble core drill bit |
| 01/18/2012 | CN102322226A Self-locking and unlocking device for sampling pipe joints of hollow stems for soft formations |
| 01/11/2012 | CN202108446U Locking and unlocking device of sampling tube in hollow drill pipe |
| 01/05/2012 | WO2012000077A1 Remotely operable underwater drilling system and drilling method |
| 01/05/2012 | US20120000711 Coring Apparatus And Methods To Use The Same |
| 01/05/2012 | CA2802872A1 Remotely operable underwater drilling system and drilling method |
| 01/04/2012 | EP2402130A1 Device for cutting at least one end of a carrot |
| 01/04/2012 | EP2401472A1 Head assembly |
| 12/29/2011 | WO2011161415A2 Apparatus associated with sub-sea operations |
| 12/29/2011 | CA2803337A1 Apparatus associated with sub-sea operations |
| 12/28/2011 | EP2398999A1 Modular core orientation system |
| 12/28/2011 | CN102296938A 刀背开圆槽的取心工具 Open knife blade circular groove coring tool |
| 12/28/2011 | CN101514614B 干冰升华孔底冷冻保压取样器及取样方法 Dry ice sublimation hole bottom freezer packing sampler and sampling methods |
| 12/22/2011 | WO2011130148A3 Coring apparatus and methods |
| 12/21/2011 | EP2396500A1 Downhole tool housing |
| 12/21/2011 | CN202081846U 绳索取心钻具可调式堵塞报信机构 Coring drill blockage adjustable messenger agency |
| 12/21/2011 | CN102287154A 松软煤层自封闭式取样钻头 Soft coal self enclosed sampling drill |
| 12/14/2011 | CN102278086A 一种捞矛头防倒结构 One kind of fishing spearhead anti-down structure |
| 12/14/2011 | CN102278085A 钻进取芯装置 Drilling coring device |
| 12/08/2011 | WO2011153149A2 Core barrel restraint |
| 12/08/2011 | US20110297444 Core barrel restraint |
| 12/08/2011 | CA2801019A1 Core barrel restraint |
| 12/07/2011 | CN202064866U 松软煤层自封闭式取样钻头 Soft coal self enclosed sampling drill |
| 12/07/2011 | CN202064837U 迷宫式隔液钻头及迷宫式隔液取心钻进工具 Maze and labyrinth drill fluid barrier across the liquid core drilling tools |
| 12/07/2011 | CN102268970A 岩心提断机构 Core mention broken bodies |
| 12/07/2011 | CN101498200B 一种用于取芯仪器的组合运动机构 A core instrument for combined motion mechanism |
| 11/30/2011 | CN202055790U 一种捞矛头防倒结构 One kind of fishing spearhead anti-down structure |
| 11/30/2011 | CN202055784U 地质勘探取芯钻头 Geological exploration core drill |
| 11/24/2011 | US20110284289 Downhole marking apparatus and methods |
| 11/23/2011 | CN101349148B Double-feedback fluid-control one-way throttle velocity modulation composite valve |
| 11/22/2011 | US8061442 Method to detect formation pore pressure from resistivity measurements ahead of the bit during drilling of a well |
| 11/16/2011 | CN202039806U Combined concrete coring device |
| 11/09/2011 | CN202031513U Core-taking grabbing spring for drilling soft and broken stratum geological cores |
| 11/09/2011 | CN202031512U Large-caliber core drill bit for coal seam gas |
| 11/09/2011 | CN202031511U Pressure relief device for coring tool |
| 11/03/2011 | US20110266066 Dry drilling and core acquisition system |