| Patents for E21B 25 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors (2,102) |
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| 05/30/2014 | WO2013151435A3 Drill device |
| 05/21/2014 | CN203603813U 适用于密闭取心的岩心爪组合件 Core claw assembly suitable for sealed coring |
| 05/15/2014 | WO2014072938A1 Seated hammer apparatus for core sampling |
| 05/14/2014 | CN203594394U 一种绳索中深孔钻具 Deep drilling in one kind of rope |
| 05/13/2014 | US8720606 Locking mechanism for a ground drill |
| 05/07/2014 | CN103775013A 差动式空气钻井取心装置及方法 Differential air drilling coring apparatus and method |
| 04/30/2014 | EP2723974A1 Core capture and recovery from unconsolidated or friable formations |
| 04/30/2014 | CN203570241U Casing coring drilling tool |
| 04/30/2014 | CN203570240U Novel single-action mechanism |
| 04/30/2014 | CN203570239U Improved drilling tool internal single action mechanism |
| 04/30/2014 | CN203570238U New type single action mechanism of drill |
| 04/23/2014 | CN203559848U Novel clamping-removing pipe structure |
| 04/23/2014 | CN203559844U Clamp spring |
| 04/23/2014 | CN203559843U Single-action mechanism inside drilling rig |
| 04/23/2014 | CN203559842U Novel internal single-action mechanism of drilling tool |
| 04/23/2014 | CN203559841U Novel single-acting mechanism |
| 04/23/2014 | CN203559840U Improved drilling tool single acting mechanism |
| 04/23/2014 | CN203559839U Movement control mechanism for elastic clamp pincers |
| 04/23/2014 | CN203559838U Movement control mechanism for elastic clamp pincers |
| 04/23/2014 | CN203559837U Coring pipe structure used for drilling tool |
| 04/23/2014 | CN203559836U Snap spring equipped with elastic sheets on drilling rig |
| 04/23/2014 | CN203559835U Snap spring equipped with inclined teeth on drilling rig |
| 04/23/2014 | CN203559834U Blue spring equipped with elastic sheets on drilling rig |
| 04/23/2014 | CN203559833U Snap spring on drilling rig |
| 04/23/2014 | CN203559832U A bag multi-section binding type wireline coring drilling tool |
| 04/23/2014 | CN103748314A Core capture and recovery from unconsolidated or friable formations |
| 04/17/2014 | US20140102794 Core orientation systems and methods |
| 04/16/2014 | CN203547619U Two-stage rock core catching device |
| 04/16/2014 | CN203547543U Mini-sized coring bit with sharp and round tooth |
| 04/10/2014 | WO2014053012A1 Core orientation apparatus |
| 04/09/2014 | CN102628337B Horizontal submarine polymetallic sulfide deposit area chimney sampling drill |
| 04/03/2014 | WO2014047680A1 A core lifter assembly |
| 04/02/2014 | CN203515417U Sand sampler for desert area |
| 04/02/2014 | CN203515416U Inner pipe assembly for drilling rope coring roof leakage |
| 04/02/2014 | CN203515354U Adjusting connector |
| 04/02/2014 | CN102606074B Novel submarine deep hole pressure maintaining and core drilling rig |
| 04/02/2014 | CN102444388B Rock core leakage prevention device at lower end port of core taking lining pipe of rotary type incompetent bed drill |
| 04/01/2014 | US8684110 Sealed core |
| 03/27/2014 | WO2014043751A1 Multifunction orientation system |
| 03/26/2014 | CN203499567U Self-breaking type micro coring drill bit |
| 03/26/2014 | CN203499555U Cut-through type reverse circulation impactor |
| 03/26/2014 | CN103670315A Inner bushing puller of shape protection coring tool |
| 03/20/2014 | WO2014040123A1 An improved core tray |
| 03/20/2014 | DE102012018181A1 Chisel-less drilling system has cutting device with outer ring and base which is cut as two or more thin rings by very thin laser beam, piezoelectric, water or other suitable separating process |
| 03/19/2014 | CN203488133U Water well drilling rig coring auxiliary device |
| 03/19/2014 | CN203488132U Bag multi-section binding type single-tube core taking drill |
| 03/19/2014 | CN103643913A Ice layer air turbine reverse circulation continuous coring downhole power drilling tool |
| 03/12/2014 | CN203476205U Power drilling soil taking device |
| 03/12/2014 | CN102661121B Rotary drilling machine for obtaining rock sample under polar region ice layer |
| 03/11/2014 | US8668029 Sonic latch mechanism |
| 03/06/2014 | DE102012215628A1 Device for sample taking of soft sediments with sample tube, has lifting eye arranged as suspension, which is operatively connected to units for closing upper- and lower ends of sample tube through locking unit |
| 03/05/2014 | CN203463056U Fixing seat of rock core cutter |
| 03/05/2014 | CN203463055U Bearing-supporting core drilling bit |
| 03/05/2014 | CN203463054U Portable coring drilling machine with power assisting device |
| 03/05/2014 | CN203463024U Drilling rig two-way posture regulating device |
| 03/04/2014 | US8662201 End loaded beacon housing with a side access door |
| 02/26/2014 | CN103603625A Casing coring drill and casing coring drilling method |
| 02/26/2014 | CN103603624A Single-action mechanism in drilling tool |
| 02/26/2014 | CN103603623A Novel single-action mechanism |
| 02/26/2014 | CN103603622A Improved single acting mechanism in drilling tool |
| 02/26/2014 | CN103603621A Novel drilling rig single-action mechanism |
| 02/26/2014 | CN103603620A Improved drilling tool single-action mechanism |
| 02/26/2014 | CN103603619A Elastic clamping mechanism for drilling tool |
| 02/26/2014 | CN103603618A Novel unfastening pipe structure |
| 02/25/2014 | US8657037 Drill bit and core retaining device |
| 02/25/2014 | US8657027 Single piezo-actuator rotary-hammering (SPaRH) drill |
| 02/19/2014 | EP2697470A1 Method and device for nondestructive drilling |
| 02/19/2014 | CN203441410U Rope impact drilling tool capable of adjusting hydraulic pressure |
| 02/19/2014 | CN103590773A Snap spring |
| 02/19/2014 | CN103590772A Novel single-action mechanism |
| 02/19/2014 | CN103590771A Novel internal single-action mechanism of drilling tool |
| 02/19/2014 | CN103590770A Motion control mechanism of elastic calipers |
| 02/19/2014 | CN103590769A Motion control mechanism of elastic calipers |
| 02/12/2014 | CN203430457U Wire-line coring drill bit with longhole inner pipe in place alarming function and pressure detection system thereof |
| 02/12/2014 | CN203430456U Three-piece hydraulic motor of side-wall corer |
| 02/12/2014 | CN103573202A Sand bailing mechanism and drilling tool |
| 02/06/2014 | US20140034389 Core sample orientation |
| 02/06/2014 | US20140033836 Cutting apparatus |
| 02/05/2014 | CN203420658U Guiding and positioning device for taking concrete core out of ultra-long hollow steel tube rock-socketed raking pile |
| 01/30/2014 | WO2014018737A1 Telescoping core barrel |
| 01/29/2014 | CN203412537U Rope-core recovery drilling tool |
| 01/29/2014 | CN203412536U Deep-hole rock core covering-taking device |
| 01/28/2014 | CA2703281C Sealed core |
| 01/23/2014 | WO2014012781A2 Intelligent coring system |
| 01/22/2014 | EP2686515A2 Pressure coring assembly and method |
| 01/16/2014 | WO2013162841A3 Multi-fluid injector core holder |
| 01/15/2014 | CN203394400U Ignition screw of coring barrel |
| 01/15/2014 | CN103510901A Tubular core-taking-out structure for drilling tool |
| 01/15/2014 | CN103510900A Clamp spring with elastic sheets on drill machine |
| 01/15/2014 | CN103510899A Clamp spring on drill machine |
| 01/15/2014 | CN103510898A Clamp spring with helical teeth on drill machine |
| 01/15/2014 | CN103510897A Orchid spring with elastic sheets on drill machine |
| 01/15/2014 | CN103510886A Split nut type drilling coring loading mechanism |
| 01/14/2014 | CA2679415C Rock core logging |
| 12/26/2013 | US20130341088 Apparatus associated with sub-sea operations |
| 12/25/2013 | CN203362086U Coring barrel structure capable of being used for coring of inclined shaft |
| 12/25/2013 | CN203362085U Circumferential locking device for sediment stratum coring |
| 12/25/2013 | CN102182414B Deep-sea sediment core pressure-maintaining device matched with submarine drilling rig and method for using deep-sea sediment core pressure-maintaining device |
| 12/18/2013 | CN203347719U Pressure release device for well drilling core taking |
| 12/18/2013 | CN103452510A Water pressure-adjustable rope impact drill |