| 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) |
|---|
| 05/29/1997 | WO1997019251A1 Downhole arrangement for downhole sampling in oil wells |
| 05/21/1997 | EP0774565A2 Downhole arrangement for acquiring well information |
| 05/21/1997 | EP0774041A1 Locking a sample tube in a downhole hammer |
| 05/13/1997 | US5628364 Comprising an air pump to draw subterranean gases and moisture through shaft as needed in response to detection of bioremediation fluid depth; noncontamination of water table |
| 05/09/1997 | WO1997016698A1 Strain-sensing device |
| 05/02/1997 | EP0628165B1 Analysis of drilling fluids |
| 05/01/1997 | WO1997015804A1 Strain monitoring system |
| 04/29/1997 | US5623992 Introducing oxygen containing gas and soluble nitrogen into multiplicity of closely spaced aeration columns in soil extending below groundwater depth; rising oxygenated water circulates through soil where microorganisms degrade gasoline |
| 04/22/1997 | US5623108 Method and system for measuring three-dimensional displacement |
| 04/22/1997 | US5622231 Cutting head |
| 04/22/1997 | US5622223 Apparatus and method for retrieving formation fluid samples utilizing differential pressure measurements |
| 04/15/1997 | US5621170 Method for testing gas wells in low pressured gas formations |
| 04/15/1997 | US5621169 Method for determining hydrocarbon/water contact level for oil and gas wells |
| 04/08/1997 | US5617927 For wireline use in an earth bore hole |
| 04/02/1997 | EP0765430A1 Soil sampler |
| 04/01/1997 | US5616840 Method for estimating the hydraulic conductivity of a borehole sidewall fracture |
| 04/01/1997 | US5616833 Dynamic cone penetration device |
| 03/26/1997 | EP0764236A1 Use of a sampling apparatus for calibrating electronic mass flow/fraction meters, in a pipeline |
| 03/25/1997 | US5615115 Method of determining pore pressure and fracture gradient profiles using seismic transit times |
| 03/25/1997 | CA2128481C Well test imaging |
| 03/18/1997 | US5612498 Ground water sampling device |
| 03/18/1997 | US5612493 Method of determining gas-oil ratios from producing oil wells |
| 03/18/1997 | US5611671 Pumping system for groundwater sampling |
| 03/12/1997 | CA2185067A1 Production wells having permanent downhole formation evaluation sensors |
| 03/11/1997 | US5609205 Well fluid sampling tool |
| 03/06/1997 | WO1997008424A1 Downhole tool system |
| 02/27/1997 | DE19531337A1 Deep fluid sample extractor operated by permanent magnet |
| 02/13/1997 | WO1997005361A1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing |
| 02/12/1997 | EP0757746A1 Method for measuring formation fluids in drilling fluid |
| 02/11/1997 | US5602334 Wireline formation testing for low permeability formations utilizing pressure transients |
| 02/06/1997 | WO1997004213A1 Hazardous waste characterizer and remediation method and system |
| 02/05/1997 | CN2246710Y Drilling sidewall coring tool |
| 02/04/1997 | US5598866 Portable well testing apparatus |
| 01/28/1997 | US5597042 Method for controlling production wells having permanent downhole formation evaluation sensors |
| 01/28/1997 | US5597016 Mechanical lockout for pressure responsive downhole tool |
| 01/25/1997 | CA2154525A1 Identifying oil well sites |
| 01/23/1997 | WO1997002405A1 Drilling apparatus |
| 01/21/1997 | US5596186 High sensitivity silicon avalanche photodiode |
| 01/21/1997 | US5595245 Systems of injecting phenolic resin activator during subsurface fracture stimulation for enhanced oil recovery |
| 01/21/1997 | CA2087866C Drill stem testing with tubing conveyed perforation |
| 01/15/1997 | EP0753648A2 Packer type groundwater sampling system and water sampling method |
| 01/15/1997 | EP0753647A2 Down hole testing apparatus with television |
| 01/15/1997 | EP0753161A1 Acoustic sensor |
| 01/14/1997 | US5594185 For evaluating the mobility, dissipation and degradation of chemicals |
| 01/02/1997 | EP0750716A1 Milling tool |
| 12/31/1996 | CA2035974C Cased hole formation tester |
| 12/24/1996 | US5587525 Formation fluid flow rate determination method and apparatus for electric wireline formation testing tools |
| 12/18/1996 | CN1138134A Testing method of formation rock drillability |
| 12/11/1996 | EP0747569A2 Down-hole tool and method for providing images of earth formations on a microscopic scale |
| 11/26/1996 | US5578769 Methods and apparatus for undisturbed subsurface soil chemistry sampling |
| 11/20/1996 | CN1136338A A method for determining the reservoir properties of a solid carbonaceous subterranean formation |
| 11/19/1996 | US5576494 Method and apparatus for subterranean load-cell testing |
| 11/19/1996 | US5576485 Single fracture method and apparatus for simultaneous measurement of in-situ earthen stress state and material properties |
| 11/12/1996 | US5574218 Determining the length and azimuth of fractures in earth formations |
| 11/05/1996 | US5571962 Method for determining wellbore depth of drill cuttings |
| 11/05/1996 | US5570747 Drive point device |
| 10/31/1996 | DE19608932A1 System for measuring load-deformation characteristics of loose stone and landfill |
| 10/30/1996 | EP0740049A2 Coiled tubing actuated sampler |
| 10/17/1996 | WO1996032567A1 Method for fracturing a formation to control sand production |
| 10/17/1996 | WO1996024745A3 Computer controlled downhole tools for production well control |
| 10/17/1996 | CA2218087A1 Method for fracturing a formation to control sand production |
| 10/09/1996 | EP0736666A2 Method and apparatus for determining the stress state and material properties |
| 10/09/1996 | EP0736131A1 A method for real time process control of well stimulation |
| 10/08/1996 | CA2045932C Method of and apparatus for detecting an influx into a well while drilling |
| 10/03/1996 | WO1996030628A1 Formation isolation and testing apparatus and method |
| 10/03/1996 | WO1996030622A1 Whipstock |
| 10/02/1996 | CN1032936C High-precision high moisture content aqueous ratio meter |
| 10/01/1996 | US5561516 Casingless down-hole for sealing an ablation volume and obtaining a sample for analysis |
| 09/25/1996 | EP0733917A2 Measuring probe for hydrogeologie measurements |
| 09/25/1996 | CN2236017Y Well-drilling liquid density and viscosity determining device |
| 09/24/1996 | US5558162 Mechanical lockout for pressure responsive downhole tool |
| 09/19/1996 | WO1996028639A1 Method and apparatus for fluid and soil sampling |
| 09/19/1996 | CA2215321A1 Method and apparatus for fluid and soil sampling |
| 09/17/1996 | US5555945 For testing a zone of interest in subsurface formation intersected by a well |
| 09/10/1996 | US5553492 Measuring system for measuring real time groundwater data |
| 08/29/1996 | WO1996026350A1 Casing with a laterally extendable tubular member and method for sand control in wells |
| 08/28/1996 | CN2233984Y Sound speed well logging instrument used in well |
| 08/28/1996 | CN2233983Y Acoustic amplitude well logging instrument used in well |
| 08/27/1996 | US5549162 Electric wireline formation testing tool having temperature stabilized sample tank |
| 08/27/1996 | US5549159 Formation testing method and apparatus using multiple radially-segmented fluid probes |
| 08/20/1996 | US5548563 Well test imaging |
| 08/20/1996 | US5548115 Probe device for detecting contaminants in subsurface media |
| 08/15/1996 | WO1996024748A1 Production wells having permanent downhole formation evaluation sensors |
| 08/15/1996 | WO1996024745A2 Computer controlled downhole tools for production well control |
| 08/06/1996 | US5543616 Identifying oil well sites |
| 08/06/1996 | US5542481 Drive point locking method and apparatus |
| 08/01/1996 | WO1996023127A1 Method and system for logging mechanical parameters of formations crossed through by a borehole |
| 08/01/1996 | CA2186402A1 Method and system for logging mechanical parameters of formations crossed through by a borehole |
| 07/30/1996 | US5540281 Method and apparatus for testing noneruptive wells including a cavity pump and a drill stem test string |
| 07/30/1996 | US5540280 Method of servicing a well |
| 07/30/1996 | US5540101 Borehole directional dilatometer |
| 07/24/1996 | EP0630485A4 Method and apparatus for downhole measurement of fluid conductivity and hydrocarbon volume during formation testing. |
| 07/23/1996 | US5538344 Device for the positioning of a mixing body with respect to a fluid flow area |
| 07/10/1996 | EP0720686A1 Method and apparatus for fluid and soil sampling |
| 07/09/1996 | CA1338437C Monitoring ionic composition of drilling mud |
| 07/03/1996 | EP0719897A1 Method and device for measuring parameters of plastic ground |
| 07/02/1996 | US5531271 Wellbore tool side support |
| 06/26/1996 | EP0718466A1 Downhole tool with hydraulic timer |
| 06/26/1996 | EP0717810A1 Method for detecting pressure measurement discontinuities caused by fluid boundary changes |
| 06/26/1996 | EP0717808A1 Apparatus for use in a wellbore |