| 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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| 08/11/1992 | US5137086 Method and apparatus for obtaining subterranean fluid samples |
| 08/04/1992 | US5135871 Method for isolating kerogen from a mineral sample in a pressurized reaction cell |
| 08/04/1992 | US5135052 Recovery of oil using microemulsions |
| 08/04/1992 | US5134879 Test method and apparatus |
| 07/29/1992 | EP0496652A1 Method and apparatus for drawing and conditioning samples of subterranean water, especially for determining the quantity of dissolved gases therein, and their use in the field of bacterial analysis |
| 07/21/1992 | US5132903 Dielectric measuring apparatus for determining oil and water mixtures in a well borehole |
| 07/15/1992 | EP0494775A2 Production property determination of subterranean formation |
| 07/14/1992 | US5130949 Geopressure analysis system |
| 07/10/1992 | CA2059048A1 Method for determining liquid recovery during a closed-chamber drill stem test |
| 07/09/1992 | WO1992008875A3 Well completion system |
| 07/07/1992 | US5128882 Device for measuring reflectance and fluorescence of in-situ soil |
| 07/07/1992 | US5128866 Pore pressure prediction method |
| 07/07/1992 | US5127261 Self-contained apparatus and method for determining the static and dynamic loading characteristics of a soil bed |
| 07/07/1992 | CA1304673C Method of forming a plurality of spaced substantially parallel fractures from a deviated well bore |
| 07/07/1992 | CA1304672C Tubing conveyed sampler |
| 07/07/1992 | CA1304671C Method of exploration for hydrocarbons |
| 07/01/1992 | EP0491841A1 Pore pressure prediction method |
| 06/30/1992 | US5126939 Method for estimating the organic matter content of sedimentary rocks from data recorded in wells by well-logging probes |
| 06/30/1992 | US5125266 Self-contained apparatus and method for determining the static and dynamic loading characteristics of a soil bed |
| 06/30/1992 | CA1304286C System for recovery of petroleum from petroleum impregnated media |
| 06/23/1992 | US5123492 Method and apparatus for inspecting subsurface environments |
| 06/23/1992 | CA1303971C Perforating gun firing tool |
| 06/17/1992 | EP0490421A1 Downhole measurements using very short fractures |
| 06/17/1992 | EP0490420A2 Downhole penetrometer |
| 06/16/1992 | US5121643 Soil sampling tool |
| 06/12/1992 | CA2056965A1 Downhole penetrometer |
| 06/10/1992 | EP0489447A1 A method for the esimation of pore pressure within a subterranean formation |
| 05/29/1992 | WO1992008875A2 Well completion system |
| 05/29/1992 | WO1992008874A1 Surface sand monitoring device and method in an oil production stream |
| 05/26/1992 | US5115871 Method for the estimation of pore pressure within a subterranean formation |
| 05/19/1992 | US5113941 Surface sand detection monitoring device and method |
| 05/19/1992 | CA1301302C Method and device for increasing the transmission coefficient to geological formations of the energy generated by a seismic source in a well |
| 05/13/1992 | EP0281582B1 System for sensing ions in aqueous solution |
| 05/12/1992 | US5111882 Use of tracers to monitor in situ miscibility of solvent in oil reservoirs during EOR |
| 05/12/1992 | US5111881 Method to control fracture orientation in underground formation |
| 05/12/1992 | US5111547 Method for forming precision liquid/vapor separating bristle assembly |
| 05/05/1992 | US5110457 Screening larger particles, separation of remainder in cyclone |
| 05/05/1992 | US5109712 Portable sample cylinder with reduced seal permeability |
| 05/05/1992 | US5109697 Method of exploration for hydrocarbons |
| 04/29/1992 | EP0483110A2 Method and device for making a well |
| 04/29/1992 | EP0482926A2 Downhole tool with hydraulic timer |
| 04/29/1992 | EP0482912A1 Downhole pump for formation testing |
| 04/29/1992 | EP0482911A2 Evaluation of fluid loss for subsurface fracturing |
| 04/29/1992 | EP0482748A1 Wellbore fluid sampler |
| 04/29/1992 | EP0482074A1 Test method for boring |
| 04/29/1992 | CN2103003U Hydraulic pressure piston type thin wall earth taker |
| 04/25/1992 | CA2051851A1 Wellbore fluid sampler |
| 04/22/1992 | EP0481866A2 Method for individually characterizing the layers of a hydrocarbon subsurface reservoir |
| 04/21/1992 | US5105894 Method and apparatus for orientating core sample and plug removed from sidewall of a borehole relative to a well and formations penetrated by the borehole |
| 04/21/1992 | US5105881 Formation squeeze monitor apparatus |
| 04/21/1992 | US5105659 Detection of fracturing events using derivatives of fracturing pressures |
| 04/21/1992 | US5105656 Method and apparatus for testing polymer drilling mud |
| 04/14/1992 | US5103921 Coring assembly for mounting on the end of a drill string |
| 04/14/1992 | US5103906 Hydraulic timer for downhole tool |
| 04/14/1992 | CA1298779C Bottom hole shut-in tool |
| 04/07/1992 | US5103428 Method for optimizing well production rates |
| 03/25/1992 | EP0476758A2 Detection of fracturing events using derivatives of fracturing pressures |
| 03/24/1992 | US5097914 Method and device for producing unadulterated water samples in drilling a well |
| 03/20/1992 | WO1992005338A1 A method and an apparatus for taking and analysing level determined samples of pore gas/liquid from a subterranean formation |
| 03/20/1992 | CA2091881A1 Method and an apparatus for taking and analysing level determined samples for pore gas/liquid from a subterranean formation |
| 03/18/1992 | EP0475791A2 Apparatus and method for detecting the presence of gas in a borehole flow stream |
| 03/17/1992 | US5095983 Multiphase production evaluation method using thru-tubing, wireline packoff devices |
| 03/17/1992 | US5095982 Method of characterizing the flowpath for fluid injected into a subterranean formation |
| 03/17/1992 | US5095745 Method and apparatus for testing subsurface formations |
| 03/17/1992 | CA1297587C Method for determining pore pressure and horizontal effective stress from overburden and effective vertical stress |
| 03/11/1992 | EP0474350A1 Control of subterranean fracture orientation |
| 03/11/1992 | CN1015834B Accurate position seismic wave transmission device |
| 03/10/1992 | CA2050793A1 Detection of fracturing events using derivatives of fracturing pressures |
| 03/04/1992 | EP0473472A1 Device for making thermodynamic measurements on samples coming preferably from oil formations |
| 03/04/1992 | CN1015731B Method of exploration for hydrocarbons |
| 03/04/1992 | CN1015729B Test technology for thermally cyclic parallel-pipe oil extraction |
| 03/03/1992 | US5093811 Fracture investigation by resonance sweeping technique |
| 03/03/1992 | US5092167 Method for determining liquid recovery during a closed-chamber drill stem test |
| 03/03/1992 | CA1296707C Method of controlling fluid influxes in hydrocarbon wells |
| 03/03/1992 | CA1296618C Methods for monitoring temperature-vs-depth characteristics in a borehole |
| 03/03/1992 | CA1296605C Single well test for evaluating co _injection |
| 03/01/1992 | CA2050183A1 High temperature and pressure igniter for downhole percussion coring guns |
| 02/26/1992 | CN1015675B Quantitative determination by elemental logying of subsurface formation properties |
| 02/25/1992 | US5090256 Method and apparatus for sampling the gaseous content of a liquid |
| 02/25/1992 | US5090238 Oil well production testing |
| 02/19/1992 | EP0471065A1 Self propelled probe, particularly for penetrating a powdered material |
| 02/18/1992 | CA1295952C Steam profile liquid/vapour separator |
| 02/12/1992 | EP0470160A1 Well control apparatus. |
| 02/11/1992 | US5086646 Apparatus and method for analyzing well fluid sag |
| 02/06/1992 | WO1992001857A1 Drilling method and drill bit equipment |
| 02/05/1992 | EP0469427A1 Sampling device |
| 02/04/1992 | US5086089 Programmed gelation of polymers using melamine resins |
| 01/30/1992 | DE4023595A1 Continuous degassing of borehole drilling mud with air excluded - provides information on gas bearing rock formation contg. the borehole |
| 01/28/1992 | US5084617 Fluorescence sensing apparatus for determining presence of native hydrocarbons from drilling mud |
| 01/21/1992 | US5082054 In-situ tuned microwave oil extraction process |
| 01/15/1992 | EP0466255A2 Method of determining the drilling conditions associated with the drilling of a formation with a drag bit |
| 01/15/1992 | EP0466229A1 Method of and apparatus for detecting an influx into a well while drilling |
| 01/14/1992 | US5080182 Method of analyzing and controlling a fluid influx during the drilling of a borehole |
| 01/14/1992 | CA1294214C Apparatus for retaining axial movement relative to a cylindrical housing |
| 01/08/1992 | CN2092600U Thin-wall soil taking apparatus with fixed pistons of bottom water drindging and water-pressured type |
| 01/08/1992 | CN1057696A Well logging with distance-varying sound source and relevant transducer |
| 01/07/1992 | CA1293923C Matrix treatment process for oil extraction applications |
| 12/31/1991 | US5076372 Under frame mounted soil sampler for light trucks |
| 12/27/1991 | EP0462803A2 Method and apparatus for determining oil/water mixtures in a well borehole |
| 12/24/1991 | US5074359 Method for hydraulic fracturing cased wellbores |