| Patents for E21B 49 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells (11,875) |
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| 10/01/1985 | CA1194598A1 Well monitoring, controlling and data reducing system |
| 09/24/1985 | US4542648 Method of correlating a core sample with its original position in a borehole |
| 09/17/1985 | US4541481 For use with a well tester |
| 09/17/1985 | CA1193473A1 Well testing apparatus and method |
| 09/10/1985 | US4540882 Method of determining drilling fluid invasion |
| 09/03/1985 | US4538683 Multiple point groundwater sampler |
| 09/03/1985 | US4538452 Bore-hole hydraulics simulator |
| 08/27/1985 | US4537258 Low pressure responsive downhole tool |
| 08/20/1985 | US4536713 Electrical resistivity measurement of a flowing drilling fluid using eddy currents generated therein |
| 08/20/1985 | US4535843 Method and apparatus for obtaining selected samples of formation fluids |
| 08/13/1985 | US4534231 Method and device for taking soil samples |
| 08/07/1985 | EP0150757A2 Device for determining state of strain |
| 07/30/1985 | US4531403 Method and apparatus for fracturation detection |
| 07/23/1985 | US4531189 Data conversion, communication and analysis system |
| 07/23/1985 | US4531188 Methods for automatic processing of information obtained by well logging |
| 07/17/1985 | EP0148696A1 Apparatus and method for taking a sample representative of the fluid in a well bore |
| 07/16/1985 | US4529878 Determination of residual oil saturation using thermal neutron decay measurements without knowledge of the formation or formation fluids |
| 07/16/1985 | US4529036 Method of determining subterranean formation fracture orientation |
| 07/16/1985 | US4528842 Method and apparatus for soil mechanics measurements of filter cakes |
| 07/02/1985 | CA1189726A1 Apparatus and method for sensing downhole pressure |
| 06/26/1985 | EP0146324A2 Method and apparatus for measuring in situ earthen stresses and properties using a borehole probe |
| 06/25/1985 | CA1189629A1 Apparatus for monitoring and controlling well drilling parameters |
| 06/25/1985 | CA1189443A1 Well information telemetry by variation of mud flow rate |
| 06/19/1985 | EP0145537A2 Drill stem testing apparatus with multiple pressure sensing ports |
| 06/19/1985 | EP0145241A2 Improvements in or relating to apparatus and methods for driving projectiles |
| 06/18/1985 | US4524434 In a mineral recovery program |
| 06/18/1985 | US4523459 Method for performing step rate tests on injection wells |
| 06/18/1985 | CA1188980A1 Method of determining residual oil saturation |
| 06/11/1985 | US4522266 Downhole tester valve with resilient seals |
| 06/05/1985 | EP0143565A1 Analysis of material from a drillhole |
| 06/04/1985 | US4520665 System for detecting a native reservoir fluid in a well bore |
| 06/04/1985 | CA1188364A1 Method of and apparatus for mining analysis |
| 05/28/1985 | US4519982 Enhanced oil recovery monitoring apparatus |
| 05/21/1985 | CA1187405A1 Recloseable auxiliary valve |
| 05/15/1985 | EP0141746A2 Annular electrical contact apparatus for use in drill stem testing |
| 05/09/1985 | WO1985002015A1 Analysis of material from a drill hole |
| 05/07/1985 | US4515219 Low pressure responsive downhole tool with floating shoe retarding means |
| 04/30/1985 | US4513612 Multiple flow rate formation testing device and method |
| 04/23/1985 | US4512186 Drill rate and gas monitoring system |
| 04/23/1985 | CA1185884A1 Ammonium test |
| 04/17/1985 | EP0137735A2 Annulus pressure responsive sampling apparatus |
| 04/17/1985 | EP0030971B1 Apparatus for drilling into the sidewall of a drill hole |
| 04/16/1985 | US4510801 Controlled heater for drilling mud testing system |
| 04/16/1985 | US4510800 Drilling mud testing system having a thermally isolated pump |
| 04/16/1985 | US4510799 Method of measuring material properties of rock in the wall of a borehole |
| 04/16/1985 | US4510797 Full-bore drill stem testing apparatus with surface pressure readout |
| 04/09/1985 | US4510437 Apparatus and method for measuring the permittivity of a substance |
| 04/09/1985 | CA1185170A1 Determination of fracture closure pressure |
| 04/03/1985 | EP0136146A2 Annulus pressure responsive downhole tool |
| 04/02/1985 | US4508354 Moving piston with self-tightening sealing ring |
| 04/02/1985 | US4508174 Downhole tool and method of using the same |
| 04/02/1985 | US4508169 Method for determining connate water saturation and salinity in reservoirs |
| 04/02/1985 | US4507957 Apparatus for testing earth formations |
| 03/27/1985 | EP0030970B1 Apparatus and method for drilling into the sidewall of a drill hole |
| 03/26/1985 | US4507735 Method and apparatus for monitoring and controlling well drilling parameters |
| 03/26/1985 | US4506731 Apparatus for placement and retrieval of downhole gauges |
| 03/20/1985 | EP0134734A1 Oil well logging method and apparatus |
| 03/19/1985 | CA1184113A1 Deflate-equalizing valve apparatus for inflatable packer formation tester |
| 03/12/1985 | CA1183770A1 Annulus pressure controlled reversing valve |
| 03/05/1985 | US4502537 Apparatus for use in a testing string in a well |
| 02/26/1985 | US4501325 Method for predicting workovers and shut-ins from analyzing the annulus effluent of a well |
| 02/26/1985 | US4501324 Tagging with halohydrocarbon |
| 02/26/1985 | US4501323 Method and apparatus for monitoring the corrosive effects of well fluids |
| 02/26/1985 | US4501143 Preparation unit for a drilling mud testing system |
| 02/19/1985 | US4499954 Geotechnical cone lubrication apparatus and method |
| 02/19/1985 | CA1182740A1 Well completion and testing system |
| 02/12/1985 | US4498547 Earth soil sampler |
| 02/12/1985 | US4498536 Method of washing, injecting swabbing or flow testing subterranean wells |
| 01/30/1985 | EP0132423A1 Borehole logging and work-over method and apparatus |
| 01/29/1985 | US4495805 In-situ permeability determining method |
| 01/29/1985 | US4495804 Method of and apparatus for mining analysis |
| 01/29/1985 | US4495800 Method for determining optimum concentration of hydration inhibitor for clays in drilling fluids |
| 01/22/1985 | US4495292 Determination of expandable clay minerals at well sites |
| 01/15/1985 | US4494071 Determination of water saturation in earth formations independent of lithology |
| 01/08/1985 | US4492864 Neutron well logging |
| 01/08/1985 | CA1180658A1 Apparatus for testing earth formations |
| 01/01/1985 | US4491022 Cone-shaped coring for determining the in situ state of stress in rock masses |
| 12/25/1984 | US4489786 Low pressure responsive downhole tool with differential pressure holding means |
| 12/25/1984 | US4489779 For withdrawing groundwater samples from a monitoring well |
| 12/18/1984 | US4488597 For use with a well-logging tool |
| 12/11/1984 | US4487261 Well completion and testing system |
| 12/11/1984 | US4487054 Method for projecting landfill gas collection rate of a surface collector |
| 11/28/1984 | EP0126680A2 Formation sampling apparatus |
| 11/27/1984 | US4484632 Well completion method and apparatus |
| 11/27/1984 | US4484626 Pneumatic packer |
| 11/27/1984 | US4484470 Method and apparatus for determining characteristics of clay-bearing formations |
| 11/20/1984 | US4483189 Flushing apparatus for a drilling mud testing system |
| 11/20/1984 | US4483187 Surface readout drill stem test control apparatus |
| 11/14/1984 | EP0125164A1 Method of determining the characteristics of an underground formation producing fluids |
| 11/13/1984 | US4482634 Chemical flood testing method |
| 11/13/1984 | US4482021 Soil sampler |
| 11/13/1984 | US4482013 Mechanical wireline borehole packer |
| 10/23/1984 | US4479204 In a mineral recovery program |
| 10/23/1984 | US4478069 Flow resistivity instrument in the earth |
| 10/16/1984 | CA1176077A1 Device for taking ground water samples in soil and rock |
| 10/10/1984 | EP0121329A2 Downhole well tool |
| 10/09/1984 | US4475591 Method for completing and monitoring a well |
| 10/09/1984 | US4475386 Borehole gravimetry system |
| 10/03/1984 | EP0120622A2 Placement and retrieval of downhole gauges |
| 10/02/1984 | US4474250 Measuring while drilling |