| Patents for E21B 25 - Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors (2,102) |
|---|
| 09/04/1997 | WO1997032110A2 Downhole core sampling and testing apparatus |
| 09/02/1997 | US5662182 System for in situ replacement of cutting means for a ground drill |
| 09/02/1997 | US5662179 Hole-making device |
| 08/13/1997 | CN2259483Y Simple coring device |
| 07/24/1997 | WO1997026441A1 Fluid lubricant for a core sample and use thereof |
| 07/24/1997 | WO1997026440A1 Core sampler |
| 07/24/1997 | WO1997026439A1 Core sampling method and core sampler therefor |
| 07/24/1997 | WO1997026438A1 Core sampler |
| 07/01/1997 | US5644091 Material sampling method and device |
| 06/05/1997 | DE19625125C1 Soil sample extraction method |
| 05/22/1997 | WO1997008935A3 Method, sampling device and tube for taking a soil sample |
| 05/21/1997 | EP0774041A1 Locking a sample tube in a downhole hammer |
| 04/02/1997 | EP0765430A1 Soil sampler |
| 03/13/1997 | WO1997008935A2 Method, sampling device and tube for taking a soil sample |
| 02/25/1997 | US5606139 Soil sample probe with retaining ring for holding core-catching structure within the probe |
| 02/11/1997 | US5601152 Vibrator core drilling apparatus |
| 02/11/1997 | CA2006607C Core barrel adjusting system |
| 01/28/1997 | CA2138201C Propulsion seal for wire line core drilling apparatus |
| 01/23/1997 | WO1997002405A1 Drilling apparatus |
| 01/14/1997 | US5592994 Propulsion seal for wire line core drilling apparatus |
| 01/01/1997 | CN1139176A Composite-material core barrel |
| 12/24/1996 | US5587540 Soil sampling device with latch assembly having a variable circumferential shape |
| 12/10/1996 | CA2053719C Drilling apparatus, particularly wire line core drilling apparatus |
| 12/05/1996 | WO1996038394A1 Curable gypsum-containing composition and method for stabilization of unconsolidated core samples |
| 11/28/1996 | DE19518380A1 Drilling core catcher, preventing hazardous release of large core samples |
| 11/20/1996 | CN1136129A Large diameter core sampler |
| 11/06/1996 | CN2239501Y Piston clay bit |
| 10/29/1996 | US5568838 Of a subterranean formation |
| 10/08/1996 | US5562169 Sonic Drilling method and apparatus |
| 10/01/1996 | US5560438 Method and composition for preserving core sample integrity using an encapsulating material |
| 10/01/1996 | US5560437 Telemetry method for cable-drilled boreholes and method for carrying it out |
| 09/25/1996 | EP0327598B1 Fusion-drilling process |
| 09/19/1996 | WO1996028639A1 Method and apparatus for fluid and soil sampling |
| 09/19/1996 | CA2215321A1 Method and apparatus for fluid and soil sampling |
| 09/11/1996 | EP0702746A4 System for in situ replacement of cutting means for a ground drill |
| 09/10/1996 | US5553677 Survey process for cable core borings and device for implementing it |
| 08/28/1996 | EP0646214B1 Survey process for cable core borings and device for implementing it |
| 08/27/1996 | US5549170 Method of removing material from a subsurface |
| 08/20/1996 | US5546798 Method and composition for preserving core sample integrity using a water soluble encapsulating material |
| 08/07/1996 | EP0601030B1 Process and device for measuring cable drilled bores |
| 08/06/1996 | US5542481 Drive point locking method and apparatus |
| 08/06/1996 | US5542476 Apparatus for drilling and maintenance of holes in a golf course |
| 07/31/1996 | CN2232072Y Rotary plunging undisturbed core extractor |
| 07/23/1996 | US5537753 Bore hole inclinometer apparatus |
| 07/17/1996 | CN2231306Y Core catcher |
| 07/10/1996 | EP0720686A1 Method and apparatus for fluid and soil sampling |
| 06/12/1996 | EP0715677A1 Coring assembly and method |
| 05/21/1996 | US5517868 Method for obtaining a soil sample |
| 05/01/1996 | EP0709544A2 Method and apparatus for pressure coring with non-invading gel |
| 05/01/1996 | CN1121553A Bit segments for a ground drill bit |
| 04/26/1996 | CA2160277A1 Method and apparatus for pressure coring with non-invading gel |
| 04/16/1996 | US5507357 Pilot bit for use in auger bit assembly |
| 04/09/1996 | US5505098 Cartridge for preserving a soil sample |
| 03/27/1996 | EP0702746A1 System for in situ replacement of cutting means for a ground drill |
| 03/26/1996 | US5501283 Hole cutting device for recovering targets located with a metal detector |
| 03/20/1996 | EP0701466A1 A hole-making device |
| 03/07/1996 | DE4430874A1 Ground e.g. soil sample core acquisition using esp. small-bore techniques |
| 02/27/1996 | US5494119 In percussion type downhole drilling equipment |
| 02/15/1996 | WO1996004459A1 Locking a sample tube in a downhole hammer |
| 02/15/1996 | CA2180724A1 Locking a sample tube in a downhole hammer |
| 02/06/1996 | US5488876 Soil sampling system with sample container ridgidly coupled to drive casing |
| 01/31/1996 | CN1115993A System for in situ replacement of cutting means for a ground drill |
| 01/18/1996 | WO1996001360A1 Soil sampler |
| 01/18/1996 | CA2194368A1 Soil sampler |
| 01/17/1996 | CN2217682Y Drilling device for cobble and gravel |
| 01/09/1996 | US5482123 Method and apparatus for pressure coring with non-invading gel |
| 01/02/1996 | US5479741 Guard for protecting a plant |
| 12/28/1995 | WO1995035428A1 Soil sampler with fluid-coupled latching system |
| 12/27/1995 | CN2216138Y Coring device |
| 12/12/1995 | US5474141 Apparatus for obtaining a soil core sample |
| 12/12/1995 | US5474140 Soil sampling probe |
| 11/29/1995 | CN2213837Y Porous Stratigraphic coring tool |
| 11/23/1995 | WO1995031707A1 Method and cartridge for obtaining soil samples |
| 11/22/1995 | CN1030341C Diamond drilling tool for complex stratum |
| 11/01/1995 | CN1111002A Method for testing water-covering oil layer saturation degree by using normal boring sample-test reference |
| 10/25/1995 | EP0678654A2 Replaceable cutting means segment for use in a ground drill |
| 10/25/1995 | EP0678653A2 Tool for use in system for in situ replacement of cutting means for a ground drill |
| 10/25/1995 | EP0678652A2 Insert for use in retaining a cutting means in a ground drill |
| 10/25/1995 | EP0678651A2 Drive sub for connection to a ground drill |
| 09/19/1995 | US5450913 Continuous soil sampling system and method |
| 08/29/1995 | US5445229 Method and apparatus for drilling, cracking, and withdrawing earth cores |
| 08/17/1995 | WO1995021988A1 A core barrel system |
| 08/08/1995 | US5439065 Rotary sidewall sponge coring apparatus |
| 08/05/1995 | CA2115004A1 Pilot bit for use in auger bit assembly |
| 08/03/1995 | WO1995020309A1 Digging tool |
| 08/03/1995 | CA2179182A1 Digging tool |
| 07/25/1995 | US5435399 Soil sampler |
| 07/14/1995 | CA2139963A1 Bore hole inclinometer apparatus |
| 07/11/1995 | US5431466 Apparatus for pulling cores |
| 07/06/1995 | WO1995018289A1 Drilling method for detecting soil contamination by high-density liquid materials |
| 06/27/1995 | US5427189 For making small diameter holes in the earth |
| 06/06/1995 | US5421419 Method and apparatus for fluid and soil sampling |
| 05/30/1995 | US5419211 Device for taking soil samples |
| 05/23/1995 | US5417295 Method and system for the early detection of the jamming of a core sampling device in an earth borehole, and for taking remedial action responsive thereto |
| 05/23/1995 | US5417290 Sonic drilling method and apparatus |
| 05/23/1995 | US5417122 Soil sampling system with sample container rigidly coupled to drive casing by inflated gland |
| 05/03/1995 | CN1102232A High effective sealing liquid |
| 04/13/1995 | WO1995009962A1 Continuous soil sampling system and method |
| 04/13/1995 | DE4334881A1 Method and device for manipulating a stem guided in a hollow auger drilling tool |
| 04/05/1995 | EP0646214A1 Survey process for cable core borings and device for implementing it. |