| 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) |
|---|
| 06/06/1995 | US5421419 Method and apparatus for fluid and soil sampling |
| 05/30/1995 | US5419211 Device for taking soil samples |
| 05/23/1995 | US5417103 Method of determining material properties in the earth by measurement of deformations due to subsurface pressure changes |
| 05/16/1995 | US5416697 Method for selecting a drill bit for use in drilling a well |
| 05/16/1995 | US5415030 For investigating properties of subsurface formations traversed by borehole |
| 05/11/1995 | DE4413179C1 Method and testing device for determining the minimum rock stress |
| 05/09/1995 | US5413179 System and method for monitoring fracture growth during hydraulic fracture treatment |
| 05/04/1995 | WO1995007404A3 Apparatus for use in a wellbore |
| 05/02/1995 | US5411106 Method and apparatus for acquiring and identifying multiple sidewall core samples |
| 05/02/1995 | US5411103 Moisture and soil consistency probe |
| 05/02/1995 | US5411097 High pressure conversion for circulating/safety valve |
| 05/02/1995 | US5411087 For being inserted down a borehole in the earth |
| 04/25/1995 | US5409060 Wellbore tool orientation |
| 04/25/1995 | US5408893 Ground moisture probe |
| 04/19/1995 | CN1028255C Self-drilling hydraulic piston type thin wall soil sampler |
| 04/18/1995 | US5407019 Apparatus and method for environmental surveying for contaminants in alluvial materials and bedrock formations |
| 04/13/1995 | WO1995009971A1 Methods and apparatus for making chemical concentration measurements in a sub-surface exploration probe |
| 04/13/1995 | DE4334881A1 Method and device for manipulating a stem guided in a hollow auger drilling tool |
| 04/11/1995 | US5404949 Liquid sampling apparatus |
| 04/06/1995 | WO1995009296A1 Apparatus and method for the dynamic measurement of a drill string employed in drilling |
| 04/05/1995 | EP0646810A2 Measurement of dielectric properties of fluids in a well |
| 04/05/1995 | EP0646698A1 Method of evaluating the damage of rock structures in a well |
| 04/05/1995 | EP0646215A1 Method and apparatus for pressure, volume, and temperature measurement and characterization of subsurface formations |
| 04/02/1995 | CA2116513A1 Logging system for measuring dielectric properties of fluids in a cased well |
| 03/30/1995 | WO1995008694A1 Method and apparatus for fluid and soil sampling |
| 03/29/1995 | EP0644979A1 Method and apparatus for inspecting subsurface environments |
| 03/29/1995 | CN1028049C Sampling tool for obtaining samples of fluids present in well |
| 03/16/1995 | WO1995007404A2 Apparatus for use in a wellbore |
| 03/15/1995 | EP0642624A1 Method and apparatus for determining depth of drill cuttings |
| 03/09/1995 | DE4429136A1 Multi-level packer system (MLPS) for obtaining groundwater samples as well as physical, chemical and geophysical measured values from exactly defined depths |
| 03/08/1995 | EP0641916A2 Method and apparatus for drawing gas and/or liquid samples from different layers |
| 03/07/1995 | US5395768 Measuring resistivity of brines and filtrates from muds prepared with shales |
| 03/07/1995 | US5394949 Mobile soil sampling device |
| 02/28/1995 | US5394339 Apparatus for analyzing oil well production fluid |
| 02/08/1995 | CN2189203Y Apparatus for obtg. soil samples from soft earth |
| 01/11/1995 | CN2187225Y Bank head device for well logging |
| 01/04/1995 | EP0631664A1 Process for chemical logging of a liquid and plant for carrying out said process |
| 01/03/1995 | US5379216 Method and apparatus for producing a new output record medium illustrating a quantitative description in the volume dimension of mud filtrate invasion into permeable zones of a formation in a wellbore |
| 01/03/1995 | US5377755 Method and apparatus for acquiring and processing subsurface samples of connate fluid |
| 01/03/1995 | US5377754 Progressive fluid sampling for boreholes |
| 01/03/1995 | US5377551 Probe for penetrating and displacing particularly into a mass of pulverulent material |
| 01/03/1995 | CA1333753C Sonde for taking fluid samples, in particular from inside an oil well |
| 12/28/1994 | EP0630485A1 Method and apparatus for downhole measurement of fluid conductivity and hydrocarbon volume during formation testing |
| 12/27/1994 | US5377104 Passive seismic imaging for real time management and verification of hydraulic fracturing and of geologic containment of hazardous wastes injected into hydraulic fractures |
| 12/27/1994 | US5375659 Sonde supported operating system for control of formation production fluid flow |
| 12/27/1994 | US5375658 Shut-in tools and method |
| 12/27/1994 | US5375478 For several separate testing points |
| 12/14/1994 | EP0628165A1 Analysis of drilling fluids. |
| 12/14/1994 | EP0628131A1 Well fluid sampling tool and well fluid sampling method |
| 12/13/1994 | US5372038 Probe to specifically determine the injectivity or productivity of a petroleum well and measuring method implementing said probe |
| 12/13/1994 | US5372037 Soil sampling apparatus |
| 12/08/1994 | DE4318736A1 Method and apparatus for taking gas and/or oil and/or water and/or solid samples during drilling operation |
| 11/29/1994 | US5368100 Coiled tubing actuated sampler |
| 11/23/1994 | EP0625705A2 Measurement of the erodability of drilling fluid deposits |
| 11/22/1994 | CA2120585A1 Methods and apparatus for measuring the erodability of drilling fluid deposits |
| 11/17/1994 | EP0624799A2 Pressure probe for quantitative determination of contaminants in groundwater |
| 11/15/1994 | CA2020744C Method and apparatus for the collection of reduced gases |
| 11/10/1994 | WO1994025732A1 A method of determining the production rate of each of the phases in a well stream |
| 11/08/1994 | US5361839 Full bore sampler including inlet and outlet ports flanking an annular sample chamber and parameter sensor and memory apparatus disposed in said sample chamber |
| 11/08/1994 | US5361632 Method and apparatus for determining multiphase holdup fractions using a gradiomanometer and a densitometer |
| 11/08/1994 | US5361631 Apparatus and methods for determining the shear stress required for removing drilling fluid deposits |
| 11/01/1994 | US5360738 Infrared spectroscopoy |
| 11/01/1994 | CA2019343C Evaluating properties of porous formations |
| 11/01/1994 | CA1332832C Moling system |
| 10/26/1994 | EP0621488A1 A drill-probe for the measurement of the electric resistivity of a soil |
| 10/26/1994 | EP0621397A1 Method of and apparatus for detecting an influx into a well while drilling |
| 10/26/1994 | EP0620893A1 Formation testing and sampling method and apparatus |
| 10/25/1994 | US5358059 Apparatus and method for the dynamic measurement of a drill string employed in drilling |
| 10/25/1994 | US5358057 Modular device for collecting multiple fluid samples from soil using a cone penetrometer |
| 10/25/1994 | CA1332722C Membrane - sample container |
| 10/18/1994 | US5355739 Apparatus for measuring gas emission rate from soil |
| 10/18/1994 | US5355736 Absorber device and process for using same |
| 10/18/1994 | CA2006894C Delayed opening fluid sampler |
| 10/13/1994 | WO1994023180A1 Method and apparatus for determining depth of drill cuttings |
| 10/13/1994 | CA2136974A1 Method and apparatus for determining depth of drill cuttings |
| 10/12/1994 | EP0618994A1 Sidewall rotary coring tool |
| 10/11/1994 | USRE34754 Fluid sampling apparatus |
| 10/11/1994 | US5353875 Methods of perforating and testing wells using coiled tubing |
| 10/11/1994 | US5353637 Methods and apparatus for borehole measurement of formation stress |
| 10/04/1994 | US5351532 Methods and apparatus for making chemical concentration measurements in a sub-surface exploration probe |
| 09/28/1994 | EP0616656A1 Processes for local ground treatment, especially testing and cleaning polluted ground |
| 09/20/1994 | US5348093 Cementing systems for oil wells |
| 09/14/1994 | EP0615054A1 Coiled tubing actuated sampler |
| 09/13/1994 | US5345820 Method of and arrangement for determining geohydraulic permeability of ground regions through which ground water flows |
| 09/11/1994 | CA2118672A1 Coiled tubing actuated sampler |
| 09/06/1994 | CA1331840C Low-water-pressure controlled hydrologic test method |
| 08/30/1994 | US5343440 Geopressure analysis system |
| 08/24/1994 | CN2175304Y Separation type probe for testing pressure of water in crack of earth layer and it filtration ring water saturation device |
| 08/23/1994 | US5341100 Electromagnetic wave method and apparatus for downhole measurement of fluid conductivity and hydrocarbon volume during formation testing |
| 08/23/1994 | US5339679 Self-contained apparatus and method for determining the static and dynamic loading characteristics of a soil bed |
| 08/17/1994 | CN2174564Y Piston type sample-taking device underwell |
| 08/16/1994 | US5337838 Method and an apparatus for taking and analyzing level determined samples of pore gas/liquid from a subterranean formation |
| 08/16/1994 | US5337822 Well fluid sampling tool |
| 08/16/1994 | US5337821 Method and apparatus for the determination of formation fluid flow rates and reservoir deliverability |
| 08/16/1994 | US5337601 Method and apparatus for measuring pressure in a sealed well using a differential transducer |
| 08/10/1994 | EP0610098A1 Downhole fluid property measurement |
| 08/09/1994 | US5335732 Oil recovery combined with injection of produced water |
| 08/09/1994 | US5335731 Formation testing apparatus and method |
| 08/09/1994 | US5335542 Integrated permeability measurement and resistivity imaging tool |
| 08/09/1994 | CA2051845C Determination of well pumping system downtime |