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