| 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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| 03/28/1993 | CA2052335A1 Portable sample cylinder with reduce seal permeability |
| 03/24/1993 | EP0436017A4 Analyzing a hydrocarbon reservoir by determining the response of that reservoir to tidal forces |
| 03/24/1993 | CN2128669Y Single-chain type static two purpose instrument for touch-detecting and taking soil |
| 03/24/1993 | CA2078834A1 Method and apparatus for preparing the surface of a region of soil for further testing |
| 03/23/1993 | US5195588 Apparatus and method for testing and repairing in a cased borehole |
| 03/18/1993 | WO1993005366A2 Mass flow meter |
| 03/18/1993 | WO1993005273A1 Multi-sensor relief valve well test system |
| 03/18/1993 | CA2115748A1 Multi-sensor relief valve well test system |
| 03/16/1993 | US5193619 For use in a well test pipe string |
| 03/16/1993 | CA1314411C Material stress monitor |
| 03/16/1993 | CA1314408C System for sensing ions in aqueous solution |
| 03/04/1993 | WO1993004385A1 Method of deciding bed structure and apparatus for investigating bed structure |
| 03/03/1993 | EP0530105A2 Apparatus for determining horizontal and/or vertical permeability of an earth formation |
| 03/02/1993 | US5189919 Wellhead fluid sampler |
| 03/02/1993 | US5189909 Device for measuring properties of underground water and method therefor |
| 03/01/1993 | CA2050388A1 System(s) for monitoring the qualitative variation in drilled cutting delivery to the surface during the drilling of a subterranean well |
| 02/24/1993 | EP0527924A1 Underground fluid sampling system |
| 02/23/1993 | US5188190 Method for obtaining cores from a producing well |
| 02/23/1993 | CA1313897C Method for evaluating organic material contents in sedimentary rocks |
| 02/23/1993 | CA1313863C Pore pressure formation evaluation while drilling |
| 02/23/1993 | CA1313862C Method for detecting drilling events from measurement while drilling sensors |
| 02/16/1993 | US5186048 To evaluate the fluids produced by pumping from a formation interval well |
| 02/10/1993 | CN2126917Y Drubbing tube and soil scraping mating device for percussion drilling |
| 02/09/1993 | US5184508 Method for determining formation pressure |
| 02/03/1993 | EP0526177A1 Apparatus for draining high pressure fluid samples |
| 02/03/1993 | EP0525991A1 Sidewall coring tool |
| 02/03/1993 | EP0525944A1 Determination of subterranean formation fracture parameters |
| 02/03/1993 | EP0525698A2 Device for collecting measurement samples |
| 02/02/1993 | US5183109 Method for optimizing hydraulic fracture treatment of subsurface formations |
| 01/31/1993 | CA2074962A1 Apparatus and method for draining high pressure fluid samples without mercury |
| 01/26/1993 | US5181419 Sampling of drilling mud |
| 01/21/1993 | WO1993001391A1 Method and device for evaluating the production quality of a well, particularly an oil well |
| 01/20/1993 | EP0523951A2 Downhole tool with actuator |
| 01/19/1993 | US5180007 Low pressure responsive downhold tool with hydraulic lockout |
| 01/16/1993 | CA2073801A1 Shut-in tool with electric timer |
| 01/13/1993 | EP0522628A2 Fracturing method and apparatus |
| 01/12/1993 | CA1312482C Formation testing tool and method of obtaining post-test drawdown and pressure readings |
| 01/05/1993 | US5176207 Underground instrumentation emplacement system |
| 12/30/1992 | EP0520903A2 Determining horizontal and/or vertical permeability of an earth formation |
| 12/09/1992 | CN1019407B Method of determing depth of hydraulic fracture zone in earth |
| 12/08/1992 | US5170378 Hydraulic impedance test method |
| 12/08/1992 | US5168927 Method utilizing spot tracer injection and production induced transport for measurement of residual oil saturation |
| 12/08/1992 | US5168765 Water sampler |
| 12/05/1992 | CA2043825A1 Method of detecting explosives and other substances in samples of ground material |
| 12/02/1992 | EP0515495A1 Well fluid sampling tool and well fluid sampling method |
| 12/01/1992 | US5167278 Well testing apparatus |
| 12/01/1992 | US5167149 Apparatus and method for detecting the presence of gas in a borehole flow stream |
| 11/25/1992 | EP0514657A1 Angled sidewall coring assembly and method of operation |
| 11/24/1992 | US5166747 Apparatus and method for analyzing the composition of formation fluids |
| 11/24/1992 | US5165276 Downhole measurements using very short fractures |
| 11/24/1992 | US5165275 Compensated gamma ray mudlog |
| 11/24/1992 | US5165274 For making earth stress measurements |
| 11/21/1992 | CA2065141A1 Angled sidewall coring assembly and method of operation |
| 11/19/1992 | EP0513844A1 Operating assembly for a multi-mode testing tool |
| 11/17/1992 | US5163522 Angled sidewall coring assembly and method of operation |
| 11/11/1992 | EP0345256B1 Process for making a well |
| 11/11/1992 | CA2062865A1 Hydraulically actuated downhole valve apparatus and method for testing formations |
| 11/10/1992 | US5163029 Method for detection of influx gas into a marine riser of an oil or gas rig |
| 11/10/1992 | US5161409 Analysis of drilling solids samples |
| 11/10/1992 | CA1310140C Use of tracers to monitor in situ miscibility of solvent in oil reservoirs during eor |
| 11/10/1992 | CA1310139C Method for determining residual oil saturation of a watered-out reservoir |
| 11/04/1992 | WO1992019842A1 Electro-hydraulic deep well sampling device |
| 11/04/1992 | EP0511243A1 A gas detection system |
| 11/04/1992 | CA2083716A1 Electro hydraulic deep well sampling equipment |
| 11/03/1992 | US5159833 Determining connectivity between wells within a reservoir |
| 11/03/1992 | US5159828 Microaccumulator for measurement of fluid volume changes under pressure |
| 10/29/1992 | WO1992018750A1 Seabed gas collection and monitoring device |
| 10/27/1992 | US5159569 Formation evaluation from thermal properties |
| 10/21/1992 | CN2119500U Multi-azimuth notch groove sampler |
| 10/21/1992 | CN2119499U Formation tester |
| 10/20/1992 | US5156205 Method of determining vertical permeability of a subsurface earth formation |
| 10/14/1992 | CN2118816U Top pump-following sampler of hydraulic piston pump |
| 10/13/1992 | US5154078 Kick detection during drilling |
| 10/07/1992 | EP0507405A2 Analysis of drilling fluids |
| 10/07/1992 | EP0506737A1 Sampling tool for obtaining samples of fluids present in a well. |
| 10/07/1992 | CN2118156U Laminating testing pipe column for oil drawing well |
| 10/05/1992 | CA2064514A1 Analysis of drilling fluids |
| 09/29/1992 | US5150622 Vapor probe for soil gas vapor sampler |
| 09/23/1992 | EP0505276A1 Probe for determining particularly the injectivity of an oil well and measuring process making use of this probe |
| 09/22/1992 | US5148705 Method and apparatus for determining the wettability of an earth formation |
| 09/21/1992 | CA2063509A1 Probe to specifically determine the injectivity of a petroleum well and measuring method implementing said probe |
| 09/17/1992 | WO1992015766A1 Coring assembly for mounting on the end of a drill string |
| 09/17/1992 | DE4122294C1 Evaluating test drill results in coal seams - uses different types of coal as base for evaluation |
| 09/17/1992 | CA2106691A1 Coring assembly for mounting on the end of a drill string |
| 09/15/1992 | US5147561 Inserting inert gas into sealed housing |
| 09/15/1992 | US5146998 Apparatus and method for underground sampling |
| 09/15/1992 | CA1307456C Surface read-out tester valve and probe |
| 09/09/1992 | EP0502757A1 Method for characterizing the texture heterogeneities of geological formations traversed by a borehole |
| 09/08/1992 | CA1307359C Method and apparatus for locating wet cement plugs in open bore holes |
| 09/08/1992 | CA1307197C Piezometer actuator device and method for its installation in a borehole |
| 09/02/1992 | CN2114699U Sampler for hydraulic pump exploitation well |
| 08/25/1992 | US5142471 Method for determining the pressure or stress of a geological formation from acoustic measurement |
| 08/25/1992 | US5141054 Limited entry steam heating method for uniform heat distribution |
| 08/19/1992 | EP0353275B1 Shut-in tool |
| 08/18/1992 | US5140527 Method for the determination of the ionic content of drilling mud |
| 08/18/1992 | US5139654 Liquid collector pressurizing and filtering means |
| 08/18/1992 | US5139085 Fluid sampling bottle usable in deep bore holes |
| 08/18/1992 | US5138877 Method and apparatus for intersecting a blowout well from a relief well |
| 08/18/1992 | US5138875 Method of monitoring the drilling of a borehole |
| 08/13/1992 | DE4103519A1 Earth sampling probe with core permanently fitted in tubular Jacket - ensures whole sample is easily obtained from required depth with long groove operable and closable |