Patents
Sitemap › E21 - Earth or rock drilling; Mining › E21B - Earth or rock drilling; Obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells › 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)
01/2013
01/09/2013CN202659189U Bushing coring clamping device
01/09/2013CN202659188U Compound core gripper
01/02/2013CN101886528B Cord core drilling tool for tunnel subhorizontal hole
01/02/2013CN101460698B Antenna coupling component measurement tool having rotating antenna configuration
12/2012
12/27/2012WO2012177637A1 Core capture and recovery from unconsolidated or friable formations
12/27/2012CA2839544A1 Core capture and recovery from unconsolidated or friable formations
12/26/2012CN202628006U Corer
12/26/2012CN102839916A Method for drilling high-gas tunnel geological forecast prospect hole by using impact type drilling machine
12/20/2012US20120318579 Automated Sidewall Coring
12/19/2012CN202611639U Tool for coring along with drilling well wall
12/19/2012CN102828689A Cable suspending type air partial reverse circulating motor mechanical core bit
12/19/2012CN101718166B Translational power head of all-hydraulic core drilling machine
12/18/2012US8333255 High productivity core drilling system
12/13/2012WO2012170299A2 Method and system for abandoning a borehole
12/12/2012CN202596628U Rock coal core pushing-taking combined device
12/06/2012WO2012162746A1 A coring barrel
12/06/2012US20120305317 Systems and methods for limiting winch overrun
12/05/2012CN202578510U Horizontal sampling drilling machine of deep sea polymetallic sulfide mining chimney
12/05/2012CN202578496U Rotary drilling machine for obtaining rock sample under polar region ice layer
11/2012
11/28/2012CN202560137U Electromagnetic mechanical type selective and sending device for coring gun
11/28/2012CN202560136U Chute type rock core withdrawing machine
11/28/2012CN102797427A Rock core ejection method
11/28/2012CN101936143B Reclaimable drilling rig device
11/21/2012CN202544784U Discharge valve for drilling and coring
11/21/2012CN102791954A Driven latch mechanism
11/21/2012CN102787818A Small motor-driven geological core driller
11/21/2012CN102787813A Intelligent full-hydraulic power catwalk
11/15/2012WO2012125454A3 Pressure coring assembly and method
11/14/2012CN202531072U Visual hydraulic piling sampling device for deep-sea sampling
11/14/2012CN102782248A Core drilling tools with retractably lockable driven latch mechanisms
11/07/2012CN202520262U Core leakage preventer on lower port of coring liner of drill bit
11/07/2012CN202520261U Cut-to-length core drill
11/07/2012CN202520260U Sediment pressure-maintaining storage device matched with deep sea drilling machine
11/07/2012CN202520259U Tooth division core drill
11/07/2012CN202520258U Double-elastic-clamp no-recovery-pipe rope core taking mechanism
11/07/2012CN202520241U Double-stroke propelling mechanism for deepwater coring drilling machine
11/07/2012CN202520222U Novel submarine deep-hole pressure-maintaining core drilling machine
11/07/2012CN102770618A Core drilling tools with external fluid pathways
11/01/2012US20120273272 Lockable core barrel head for drilling system and survey instrument assembly provided with a connection link for arrangement in a drilling system
10/2012
10/30/2012US8297376 Coring apparatus with sensors
10/24/2012EP2513413A2 Core drilling tools with retractably lockable driven latch mechanisms
10/24/2012EP2513412A2 Core drilling tools with external fluid pathways
10/24/2012CN202500514U Corer
10/24/2012CN202500513U Core-taking drill tool for super-fragile and soft stratum
10/24/2012CN102747973A Underground core-drilling machine
10/24/2012CN102747955A Novel deep-sea automatic extension rod drilling machine for maintaining pressure and sampling and use method of novel deep-sea automatic extension rod drilling machine
10/23/2012US8292004 Downhole marking apparatus and methods
10/23/2012CA2689825C Core orientation device
10/18/2012WO2012140222A1 Method and device for nondestructive drilling
10/18/2012US20120261189 Undisturbed core sampler
10/17/2012CN101769135B Blocking ball device for horizontal well core drill
10/16/2012US8286729 Real time misalignment correction of inclination and azimuth measurements
10/10/2012CN202483457U 8.375-inch-long eight-scraper polycrystalline diamond compact (PDC) coring bit
10/10/2012CN202483455U Coring bit with multiple scrapers
10/10/2012CN102725477A Determining methane content of a bottom sample
10/04/2012US20120247838 Drill bit and core retaining device
09/2012
09/27/2012DE102010004609A9 Meisselloses Bohrsystem Meisselloses drilling system
09/20/2012WO2012125454A2 Pressure coring assembly and method
09/20/2012CA2830213A1 High pressure coring assembly and method
09/19/2012CN202441296U Oil field open type core catcher
09/19/2012CN102686823A Core Lifter
09/19/2012CN102678076A Double-lock single elastic clip in-place locking core-taking suspension positioning mechanism
09/19/2012CN102678049A Circular cutting drill bit, rotary drilling machine and rock drilling method adopting static blasting
09/19/2012CN101928890B Cr-containing steel for wire line core drilling and manufacturing method thereof
09/12/2012EP2496788A2 Core lifter
09/12/2012CN202431240U Rock core gripper combined assembly of rope coring tool
09/12/2012CN102661147A Advancing retractable sampling drilling tool
09/12/2012CN102661121A Rotary drilling machine for obtaining rock sample under polar region ice layer
09/12/2012CN101666217B Core-filling drilling tool of rope side wall
09/11/2012US8261857 Core barrel sonic latch mechanism and methods of sonic drilling using the same
09/07/2012WO2012116393A1 Rotation actuated core orientation system
09/05/2012CN202417370U Inner barrel cutting device
09/05/2012CN202417369U Coring bit for coal mine
09/05/2012CN202417368U Oscillatory spray type reverse-circulating coring device
09/05/2012CN202417317U Double-layer coring bit used for coal mine
08/2012
08/29/2012CN102650201A Mounted type full automatic core drilling machine
08/22/2012CN101649727B Core orientator
08/21/2012CA2720872C Jointed spearhead assembly
08/15/2012EP2486235A2 Automated sidewall coring
08/15/2012EP2486223A2 Driven latch mechanism
08/15/2012CN202381007U Floating piston
08/15/2012CN202381006U Multi-level hydraulic lathe center device
08/15/2012CN202380978U Stratum coring drilling bit and stratum coring drilling tool
08/08/2012CN102628337A Horizontal submarine polymetallic sulfide deposit area chimney sampling drill
08/01/2012CN102619484A Well wall coring while drilling tool
07/2012
07/31/2012US8230950 Multi-purpose scoop
07/25/2012CN102606103A Sediment pressure maintaining storage device matched with deep-sea drilling rig and method for using sediment pressure maintaining storage device
07/25/2012CN102606102A Core leak preventer for lower end opening of drill coring lining pipe and method for using core leak preventer
07/25/2012CN102606074A Novel submarine deep hole pressure maintaining and core drilling rig
07/25/2012CN102606070A Combined drilling technique of vegetable gum diamond coring and downhole hammer casing drilling
07/19/2012CA2823777A1 Cutting apparatus
07/18/2012CN202338569U Sealing bearing for coring tool
07/18/2012CN202338248U Ball injection joint for drilling tool
07/18/2012CN102587855A Core drill suitable for breakable and weak formation
07/18/2012CN102587854A Two-elastic-card and recycling-tube-free rope coring mechanism
07/11/2012CN202325404U 保压取心球阀 Coring valve packing
07/11/2012CN202325338U 一种旋转式软岩层钻具取芯衬管下端口的岩心防漏器 A rotary blowout preventer core drilling in soft rock coring liner port
07/11/2012CN202325337U 液压顶心装置 Hydraulic top heart device
07/11/2012CN202325336U 倒置式岩样钻取机 Drill core samples inverted machine
07/11/2012CN102561970A Fidelity transfer device for natural drill cores of natural gas hydrates and method
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