| Patents for E21B 25 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors (2,102) |
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| 08/03/2006 | US20060169493 Remote operation wire line core sampling device |
| 07/25/2006 | US7080698 Mapping tool for tracking and/or guiding an underground boring tool |
| 07/20/2006 | US20060157246 Window reaming and coring apparatus and method of use |
| 07/19/2006 | CN1265074C Dual-guide rail dual-hydraulic cylinder deep-sea core drilling machine |
| 07/18/2006 | US7078905 Bore location system |
| 06/22/2006 | US20060132136 Bore location system |
| 06/22/2006 | US20060131376 Marking system and method |
| 06/22/2006 | DE102005060009A1 Kennzeichnungssystem und-verfahren Labeling system and procedures |
| 06/21/2006 | CN1789656A Marking system and method |
| 06/08/2006 | WO2006058377A1 Core barrel capacity gauge |
| 06/01/2006 | WO2005091911A3 Multiple distributed pressure measurements |
| 05/31/2006 | EP1492935B1 Method and device for coring and/or directional drilling |
| 05/23/2006 | CA2395753C Integrated transmitter surveying while boring (swb) entrenching powering device for the continuation of a guided bore hole |
| 05/04/2006 | US20060090934 Formation dip geo-steering method |
| 05/03/2006 | CN1766277A Air DTH hammer drilling equipment for core and follow-down drilling |
| 04/13/2006 | WO2005120153A3 Method and system for deep sea drilling |
| 04/06/2006 | US20060070770 Measuring the weight on a drill bit during drilling operations using coherent radiation |
| 04/05/2006 | CN1249325C Deep-sea multiple-bit incrusting and coring rig |
| 04/04/2006 | US7021404 Method and device for deviated coring and/or drilling |
| 03/29/2006 | CN2767646Y Box for containing unconsolidated and disintegrated core |
| 03/21/2006 | US7013993 Method of coring crustal core sample, and antimicrobial polymeric gel and gel material used in the method |
| 03/09/2006 | CA2819532A1 Core sample orientation |
| 03/09/2006 | CA2559030A1 Core sample orientation |
| 03/02/2006 | WO2006023695A1 A coring tubular and method for reducing contamination and processing speed of a core sample |
| 03/01/2006 | CN2761822Y Coring tool of glass reinforced plastic |
| 03/01/2006 | CN1740511A Guiding device of well drilling coring tool for use in loose ground |
| 02/28/2006 | US7004265 Apparatus and methods for sponge coring |
| 02/22/2006 | EP1454033A4 Orientation device for a core sample |
| 02/08/2006 | CN1730898A Combined core drilling system driven by downhole motor and impactor |
| 01/26/2006 | US20060016621 Method and system for deep sea drilling |
| 01/26/2006 | DE102005029349A1 Drahtleitungsgebundene Anordnung, Verfahren zum Beurteilen einer unterirdischen Formation, Bohrloch-Werkzeug und Verfahren zur Probennahme in einem Bohrloch Conducted wire assembly method for evaluating a subterranean formation downhole tool and method for sampling in a borehole |
| 01/25/2006 | EP1248893B1 Integrated transmitter surveying while boring (swb) entrenching powering device for the continuation of a guided bore hole |
| 01/18/2006 | CN1721654A Downhole formation testing tool |
| 01/10/2006 | CA2247332C Downhole core sampling and testing apparatus |
| 12/29/2005 | US20050284629 Downhole formation testing tool |
| 12/22/2005 | WO2005120153A2 Method and system for deep sea drilling |
| 12/08/2005 | WO2005116392A1 Core analysis |
| 11/29/2005 | US6968910 Ultrasonic/sonic mechanism of deep drilling (USMOD) |
| 11/16/2005 | CN2740767Y 压力式取芯器 Pressure corer |
| 11/16/2005 | CN2740766Y Directional coring device of rock core |
| 11/16/2005 | CN2740765Y Fidelity sampling drilling tool |
| 11/08/2005 | CA2378186C Method and apparatus for retaining a core sample within a coring tool |
| 11/03/2005 | US20050242818 Bore location system |
| 10/27/2005 | US20050236185 Mapping tool for tracking and/or guiding an underground boring tool |
| 10/20/2005 | US20050230107 Methods of well stimulation during drilling operations |
| 10/13/2005 | WO2005095753A1 Articulated drillstring entry apparatus and method |
| 10/06/2005 | WO2005091911A2 Multiple distributed pressure measurements |
| 09/29/2005 | US20050211443 Articulated drillstring entry apparatus and method |
| 09/15/2005 | WO2005085584A1 Downhole core orientation tool |
| 09/15/2005 | US20050199393 Logging-while-coring method and apparatus |
| 09/15/2005 | CA2559085A1 Downhole core orientation tool |
| 09/08/2005 | US20050194184 Multiple distributed pressure measurements |
| 09/07/2005 | EP1570150A1 One-step directional coring or drilling system |
| 08/25/2005 | WO2005078232A1 Core orientation device |
| 08/25/2005 | US20050183886 Method of coring a crustal core sample and flow-able coating material for coring a crustal core sample |
| 08/23/2005 | CA2175784C Method and composition for preserving core sample integrity using a water soluble encapsulating material |
| 08/17/2005 | EP1564368A2 Underwater core sampling apparatus |
| 08/10/2005 | CN2716493Y Inner core tube automatically replacing deep sea multipoint core drilling rig |
| 08/10/2005 | CN2716492Y Coring inner tube replacing device of deep sea short-hole core drilling rig |
| 08/04/2005 | US20050167158 One-step directional coring or drilling system |
| 07/26/2005 | US6922056 Bore location system |
| 07/26/2005 | US6920943 Mapping tool for tracking and/or guiding an underground boring tool |
| 07/26/2005 | CA2158903C Bit-stabilized combination coring and drilling system |
| 07/14/2005 | US20050150692 Directional cased hole side track method applying rotary closed loop system and casing mill |
| 07/07/2005 | WO2005061845A1 Window reaming and coring apparatus and method of use |
| 07/06/2005 | CN2707945Y Core fastening and protecting installation of large diameter wire line coring tool |
| 07/05/2005 | US6912898 Use of cesium as a tracer in coring operations |
| 06/23/2005 | US20050133275 Apparatus and methods for sponge coring |
| 06/23/2005 | US20050133267 [coring tool with retention device] |
| 06/23/2005 | US20050133266 Rotating drilling head drive |
| 06/22/2005 | CN1629446A Coring tool with retention device |
| 06/21/2005 | US6907931 Method and device for driving into the marine subsurface at great depths, a tubular tool for soil sampling or for measuring soil characteristics |
| 06/18/2005 | CA2490492A1 Coring tool with retention device |
| 06/16/2005 | US20050126824 Soil sampling system and method that allow headspace screening at spaced intervals without disturbing soil sample |
| 06/15/2005 | CN2704680Y Telescopic leg automatic gesture regulating stabilizer of deep sea drill |
| 06/15/2005 | CN2704679Y Shallow hole core picker of manned diving tool at deep sea |
| 05/26/2005 | WO2005047644A1 Directional cased hole side track method applying rotary closed loop system and casing mill |
| 04/07/2005 | US20050072598 Method and device for deviated coring and/or drilling |
| 04/06/2005 | CN2690572Y Core taking tool while drilling |
| 03/29/2005 | CA2290277C Swivel chamber for water actuated wireline drills |
| 03/23/2005 | CN2687304Y Core hydraulic drilling machine |
| 03/17/2005 | WO2005024174A1 Remote operation wire line core sampling device |
| 03/02/2005 | CN1587635A Three-in-one combined core drilling outfits |
| 03/01/2005 | CA2121768C Method and composition for preserving core sample integrity using an encapsulating material |
| 02/17/2005 | US20050034894 Core orientation |
| 02/01/2005 | CA2170597C Coring assembly and method |
| 01/27/2005 | WO2005008030A1 Use of cesium as a tracer in coring operations |
| 01/25/2005 | US6845677 Device for taking samples from a material of granular or powdery composition |
| 01/13/2005 | US20050005694 Use of cesium as a tracer in coring operations |
| 01/11/2005 | CA2242970C Core sampler |
| 01/05/2005 | EP1492935A1 Method and device for coring and/or directional drilling |
| 12/23/2004 | US20040256151 Crustal core sampler and method of coring crustal core sample using the same |
| 12/08/2004 | CN2661906Y Rubber barrel coring tool |
| 11/25/2004 | DE10319800A1 Hollow crown for core-drilling machine, has pipe with cutting elements arranged at front side along the propulsion direction, and a central fluid supply with its outlet set within the sphere of activity of the cutting elements |
| 11/23/2004 | US6820703 Locking device for a wire line core drilling system and a method for core drilling |
| 11/10/2004 | CN2654843Y Twin guide rail twin hydraulic cylinder deep sea core drill |
| 11/10/2004 | CN2654842Y Deep sea corer having prefeeding prelocating device |
| 11/09/2004 | CA2299381C Core sampler |
| 11/04/2004 | US20040216927 Inner core barrel head assembly for core tube within a drill string |
| 11/02/2004 | CA2292319C Positive latch core barrel apparatus |