E21B 25 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors

Patents for E21B 25 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors (2,102)
10/2002
10/23/2002	EP1251240A2 Apparatus and method for obtaining core samples
10/17/2002	US20020148643 Method and apparatus for retaining a core sample within a coring tool
10/17/2002	US20020148306 Device for talking samples from a material of granular or powdery composition
10/09/2002	EP1247936A1 Apparatus and method for coring and/or drilling
10/03/2002	US20020139583 Method of coring crustal core sample, and antimicrobial polymeric gel and gel material used in the method
10/01/2002	US6457538 Advanced coring apparatus and method
10/01/2002	US6457537 Mapping tool for tracking and/or guiding an underground boring tool
09/2002
09/25/2002	CN2512897Y Drilling bit with automatic core sampling device
09/24/2002	US6454023 Mapping tool for tracking and/or guiding an underground boring tool
09/19/2002	US20020129937 Apparatus and method of coring
09/18/2002	CN1369612A Coring method of crust rock sample, and antibacterial polymer gel and gel material used in such method
09/17/2002	CA2214755C Core drilling latch assembly
09/11/2002	EP1238183A1 A method for a valve, a valve and a wire line core drilling system including said valve
09/03/2002	US6443243 Core stabilization apparatus and method therefor
08/2002
08/07/2002	CN1362571A Deep-sea multile-bit incrusting and coring rig
07/2002
07/30/2002	US6425449 Up-hole pump-in core barrel apparatus
07/30/2002	US6425447 Apparatus for handling geological samples
07/02/2002	CA2221374C Curable gypsum-containing composition and method for stabilization of unconsolidated core samples
06/2002
06/27/2002	US20020079136 Mapping tool for tracking and/or guiding an underground boring tool
06/12/2002	EP1212512A1 A locking device for a wire line core drilling system, a wire line system including said device and a method for core drilling
06/11/2002	US6401840 Method of extracting and testing a core from a subterranean formation
05/2002
05/30/2002	WO2002042598A1 Well drilling device
05/28/2002	US6394196 Core drill
05/28/2002	US6394192 Methods for seabed piston coring
05/23/2002	WO2002040824A2 Apparatus and methods for sponge coring
05/21/2002	US6390206 Core sampler
05/10/2002	WO2002036931A1 Downhole coring device
04/2002
04/30/2002	US6378631 Apparatus for recovering core samples at in situ conditions
04/24/2002	EP1198657A1 Core orientation
04/10/2002	EP0883731B1 Core sampler
03/2002
03/21/2002	US20020033281 System for recovering core samples under pressure
03/21/2002	US20020033279 Core break-off mechanism
03/21/2002	DE10115307C1 Ground soil sampling device has inner part of front point retracted inwards at required sampling position for extraction of soil plug
03/19/2002	US6357535 Soil sampling apparatus
02/2002
02/21/2002	US20020020560 Wireline system for multiple direct push tool usage
02/20/2002	CN2477812Y Jet-flow coring appts.
02/14/2002	DE10038315A1 Drill pipe rod, to take a soil sample, has a sample holder section of two pipe shell segments with independent movement to take the sample easily and rapidly for trouble-free evaluation
01/2002
01/29/2002	US6341656 Core barrel
01/16/2002	EP0904481B1 Core machine
01/10/2002	WO2001071148A3 Guide for attachment to a roof bolter to allow for core drilling and method of coring
12/2001
12/19/2001	EP1163423A1 Core barrel
12/13/2001	US20010050559 Resistivity and dielectric constant well core measurement system for measurement while drilling and laboratory
12/12/2001	CN2464928Y Pressured coring tool in soft ground
12/06/2001	WO2001092847A1 Device for taking samples from a material of granular or powdery composition
11/2001
11/15/2001	DE10023200A1 Ice cover piercing tool has hollow screw with which ice cover is pierced
11/14/2001	EP1154076A1 Soil sampler
11/07/2001	EP0832049B1 Method for stabilization of unconsolidated core samples
10/2001
10/23/2001	US6305482 Method and apparatus for transferring core sample from core retrieval chamber under pressure for transport
09/2001
09/27/2001	WO2001071152A1 Segment for a core drill bit and method of manufacture
09/27/2001	WO2001071148A2 Guide for attachment to a roof bolter to allow for core drilling and method of coring
09/27/2001	CA2403530A1 Segment for a core drill bit and method of manufacture
09/27/2001	CA2403468A1 Guide for attachment to a roof bolter to allow for core drilling
09/19/2001	CN2448913Y Drilling core barrel for removing core blocking
09/04/2001	US6283228 Method for preserving core sample integrity
08/2001
08/23/2001	WO2001061309A1 Method and device for driving into the marine subsurface at great depths, a tubular tool for soil sampling or for measuring soil characteristics
07/2001
07/26/2001	WO2001053855A1 Resistivity and dielectric constant well core measurement system for measurement while drilling and laboratory
07/25/2001	EP1117875A1 Soil sampler
06/2001
06/19/2001	US6247358 Method for the evaluation of shale reactivity
06/12/2001	US6244363 Retrieval head for a drill bit composed of a plurality of bit segments
05/2001
05/17/2001	DE19947214A1 Ram core drilling involves sondes driven in in tandem and connected at target depth with each sonde cylinder bored out and fitted with sample removal opening.
05/15/2001	US6230825 Apparatus for recovering core samples under pressure
04/2001
04/26/2001	US20010000393 Method for preserving core sample integrity
04/25/2001	EP1094196A1 Method and soil-sampling device for preparing soil samples
04/17/2001	US6216804 Apparatus for recovering core samples under pressure
04/04/2001	EP0715677A4 Coring assembly and method
03/2001
03/29/2001	DE19940572A1 Ground sampling method uses freezing lance takes sample from bottom of prebore avoids distortion.
03/01/2001	WO2001014690A1 A method for a valve, a valve and a wire line core drilling system including said valve
03/01/2001	WO2001014689A1 A locking device for a wire line core drilling system, a wire line system including said device and a method for core drilling
02/2001
02/27/2001	USRE37066 Soil sampling system with sample container rigidly coupled to drive casing
02/14/2001	EP1076154A2 Apparatus for handling geological samples
01/2001
01/24/2001	EP1005603A4 Methods for seabed piston coring
01/24/2001	CN1061122C Bit segments for ground drill bit
01/17/2001	CN2415155Y Coring tool for directional well
01/11/2001	WO2001002696A1 Coupling device for a rock drill
01/11/2001	CA2377837A1 Coupling device for a rock drill
12/2000
12/26/2000	US6164389 Core sampling method and core sampler therefor
12/14/2000	WO2000075480A1 Core orientation
12/13/2000	EP1059417A2 Excavation equipment
12/12/2000	US6158534 Core sampler
12/03/2000	CA2294409A1 Core orientation
11/2000
11/29/2000	CN2408233Y Rock core monitor
11/21/2000	US6148933 Steering device for bottomhole drilling assemblies
11/14/2000	US6145604 Core Machine
11/08/2000	CN1058315C Composite material core barrel
10/2000
10/26/2000	DE19924035C1 Rapid replacement system for force transfer rods has cylindrical bolt with stepped bore, sliding pressure plate above protrusion, coil spring between pressure plate and stepped part of bolt
10/25/2000	CN2402798Y Shape-retaining seal coring tool
10/03/2000	US6125948 Soil sampling device with frangible section
09/2000
09/26/2000	US6123374 Mini hole digger
09/21/2000	WO2000055473A1 Core barrel
09/12/2000	US6116358 Core sampler
09/06/2000	CN2395027Y Drill-coring arch type self locking double function core catcher
08/2000
08/30/2000	CN2393997Y Coring bits
08/22/2000	US6105692 Swivel chamber for water actuated wireline drills
08/15/2000	US6102135 Portable core sampler
08/02/2000	EP1023522A1 Core drill
08/01/2000	US6095260 System, arrangements and associated methods for tracking and/or guiding an underground boring tool
08/01/2000	US6095259 Core sampler apparatus with specific attachment means
07/2000
07/26/2000	EP1021636A1 Core sampler
07/18/2000	US6089335 Positive latch core barrel apparatus
06/2000
06/07/2000	EP1005603A1 Methods for seabed piston coring

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