| Patents for E21B 25 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors (2,102) |
|---|
| 01/16/2008 | EP1212512B1 A locking device for a wire line core drilling system, a wire line system including said device and a method for core drilling |
| 01/09/2008 | CN101100931A Gas drilling centering technique |
| 01/01/2008 | US7314101 Inner core barrel head assembly for core tube within a drill string |
| 12/26/2007 | CN200996275Y Hydraulic pressurized center cutter |
| 12/19/2007 | CN200992970Y Deep soil subgrade core drilling rig |
| 12/18/2007 | US7308951 Method of coring a crustal core sample and flow-able coating material for coring a crustal core sample |
| 12/18/2007 | CA2532929C Window reaming and coring apparatus and method of use |
| 12/11/2007 | US7306056 Directional cased hole side track method applying rotary closed loop system and casing mill |
| 12/06/2007 | WO2007137356A1 Core orientation system |
| 12/06/2007 | WO2007137351A1 Core orientation determination |
| 12/06/2007 | CA2653466A1 Core orientation system |
| 12/06/2007 | CA2651818A1 Core orientation determination |
| 12/04/2007 | US7303011 Downhole formation testing tool |
| 11/29/2007 | WO2007136568A2 Core drill assembly with adjustable total flow area and restricted flow between outer and inner barrel assemblies |
| 11/29/2007 | CA2652563A1 Core drill assembly with adjustable total flow area and restricted flow between outer and inner barrel assemblies |
| 11/28/2007 | CN200982170Y Mechanical pressurization type core-picking tool |
| 11/22/2007 | CA2651914A1 Information characterization system and methods |
| 11/21/2007 | CN200978640Y Turning type deep sea hard rock fidelity core-picking device |
| 11/20/2007 | US7296638 Orientation device for a core sample |
| 11/13/2007 | US7293715 Marking system and method |
| 11/13/2007 | US7293613 Logging-while-coring method and apparatus |
| 10/24/2007 | CN200964810Y Multiple-segment core barrel core-out clamp |
| 10/17/2007 | CN200961458Y Middle cylinder core-picking tool capable of adjusting core-length |
| 10/10/2007 | CN200958379Y Abyssal hard rock coring equipment |
| 10/04/2007 | WO2007109848A1 Orientation head |
| 10/04/2007 | CA2644434A1 Orientation head |
| 09/26/2007 | CN200952371Y Total closed flag core extracting tool |
| 09/20/2007 | WO2007104103A1 Method of orientating a core sample |
| 09/20/2007 | US20070215349 Downhole Formation Testing Tool |
| 08/29/2007 | CN200940459Y Vacuum coring type rock core tube joint |
| 08/23/2007 | US20070193776 Borehole tool |
| 08/16/2007 | WO2007005822A3 System, program products, and methods for controlling drilling fluid parameters |
| 08/15/2007 | EP1817480A1 Core barrel capacity gauge |
| 08/15/2007 | CN1332117C Guiding device of well drilling coring tool for use in loose ground |
| 07/12/2007 | WO2007044143A3 Method and apparatus for transmitting sensor response data and power through a mud motor |
| 07/04/2007 | CN2918719Y Combined type rock core pawl assembly |
| 07/03/2007 | US7237607 Tubular stabbing protector and method |
| 07/03/2007 | CA2254040C Retractable core barrel valving apparatus |
| 07/03/2007 | CA2223511C Core barrel apparatus |
| 06/26/2007 | US7234547 Apparatus and methods for sponge coring |
| 06/26/2007 | CA2295655C Core barrel |
| 06/19/2007 | US7231991 Apparatus and methods for sponge coring |
| 06/13/2007 | EP1794410A2 Single solenoid guide system |
| 05/30/2007 | CN2906026Y Double-barrel hard rock core drill for large-diameter pile hole |
| 05/17/2007 | US20070107939 Logging-while-coring method and apparatus |
| 05/15/2007 | US7216725 Soil sampling system and method that allow headspace screening at spaced intervals without disturbing soil sample |
| 04/24/2007 | CA2397916C Resistivity and dielectric constant well core measurement system for measurement while drilling and laboratory |
| 04/17/2007 | CA2378748C Core orientation |
| 04/17/2007 | CA2186691C Articulated bit-selector coring tool |
| 04/05/2007 | US20070074624 Explosive pipe severing tool |
| 04/04/2007 | CN2886062Y Large-diameter diamond composite core bit |
| 04/03/2007 | US7198113 Hole cutter and method for using same |
| 03/21/2007 | CN2881070Y Reverse cone type coal rock layer drill head |
| 03/20/2007 | US7191850 Formation dip geo-steering method |
| 03/20/2007 | US7191831 Downhole formation testing tool |
| 03/15/2007 | WO2006037020A3 Single solenoid guide system |
| 03/13/2007 | CA2306810C Core drill |
| 03/13/2007 | CA2299264C Methods for seabed piston coring |
| 03/08/2007 | DE102005053360B3 Sample e.g. cylindrical rock core, storing container, has pressure pieces, where each piece has passage channel that includes two orifices in lateral edge of pieces and in truncated conical surface facing sample, respectively |
| 02/28/2007 | CN2874008Y Three leaf core sampling drill bit |
| 02/27/2007 | US7182155 Locking split barrel sampler and soil sampling system |
| 02/27/2007 | US7182152 Sampling isolator |
| 02/06/2007 | US7172037 Real-time drilling optimization based on MWD dynamic measurements |
| 02/06/2007 | US7172036 Soil sample containment device and method |
| 01/30/2007 | US7168508 Logging-while-coring method and apparatus |
| 01/25/2007 | US20070017707 One-step directional coring or drilling system |
| 01/18/2007 | WO2007006105A1 A line marker |
| 01/10/2007 | CN2856386Y High strength coring tool |
| 01/09/2007 | US7159672 Mapping tool for tracking and/or guiding an underground boring tool |
| 12/27/2006 | EP1735522A2 Multiple distributed pressure measurements |
| 12/21/2006 | US20060283637 Rotating dry drilling bit |
| 12/20/2006 | EP1734199A1 Heat insulation panel serving also as mold form, and outer heat insulation structure |
| 12/19/2006 | US7151376 Bore location system |
| 12/13/2006 | CN1289783C Three-in-one combined core drilling outfits |
| 12/07/2006 | US20060272859 Method and apparatus for collecting drill bit performance data |
| 12/05/2006 | US7143844 Earth penetrating apparatus and method employing radar imaging and rate sensing |
| 11/29/2006 | EP1334260B1 Downhole coring device |
| 11/28/2006 | CA2431824C Continuous feed drilling system |
| 11/22/2006 | EP1570150B1 One-step directional coring or drilling system |
| 11/21/2006 | CA2456506C Electronic core orientation device |
| 11/07/2006 | US7131497 Articulated drillstring entry apparatus and method |
| 10/26/2006 | US20060237232 Sealed barrel |
| 10/25/2006 | EP1715137A1 Sealed core barrel |
| 10/24/2006 | US7124841 Crustal core sampler and method of coring crustal core sample using the same |
| 10/12/2006 | US20060225921 Mapping tool for tracking and/or guiding an underground boring tool |
| 10/10/2006 | US7117958 One-step directional coring or drilling system |
| 09/13/2006 | CN2816336Y Core taking-out tool |
| 09/13/2006 | CN1274939C Integrated transmitter surveying while boring (SWB) entrenching powering device for continuation of guided bore hole |
| 09/12/2006 | US7107154 Wellbore evaluation system and method |
| 08/29/2006 | CA2337703C An improved coring bit and method for obtaining a material core sample |
| 08/23/2006 | CN2809200Y Thread off preventing coring tool for deep well |
| 08/22/2006 | US7093676 Apparatus and methods for sponge coring |
| 08/22/2006 | US7093672 Systems for deep resistivity while drilling for proactive geosteering |
| 08/16/2006 | CN2806751Y Shape-retaining coring tool for stratum core |
| 08/16/2006 | CN1818323A Shallow-hole thermal-insulating and pressure-retaining driller in deep water with natural gas hydrate for taking out ocre |
| 08/10/2006 | US20060175057 Logging a well |
| 08/10/2006 | DE102005006039A1 Sediment core sub-sampling device for e.g. exploration of sea, has core liner sealed to pressure chamber housing by lip seal, so that increase in pressure pushes piston to hydraulically move sediment core in to transfer line |
| 08/09/2006 | CN2804372Y Coring tools able to detect clogging |
| 08/03/2006 | US20060169496 Apparatus and methods for sponge coring |
| 08/03/2006 | US20060169494 Apparatus and methods for sponge coring |