| 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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| 12/29/1998 | CA2053245C Well control apparatus |
| 12/17/1998 | WO1998057143A2 Soil testing assemblies |
| 12/17/1998 | WO1998057030A1 Control and monitoring system for chemical treatment of an oilfield well |
| 12/17/1998 | CA2290454A1 Soil testing assemblies |
| 12/16/1998 | EP0883729A1 Moling apparatus and a ground sensing system therefor |
| 12/09/1998 | EP0882871A2 Formation data sensing with deployed remote sensors during well drilling |
| 12/09/1998 | EP0644979B1 Method and apparatus for inspecting subsurface environments |
| 12/09/1998 | CN1201518A Strain-Sensing device |
| 12/02/1998 | EP0881357A2 Method for controlling the development of an oil or gas reservoir |
| 12/02/1998 | CN1200804A Strain monitoring system |
| 11/26/1998 | WO1998053173A2 Improvements relating to strata logging on computer |
| 11/24/1998 | US5839509 Method and apparatus for gathering liquid sample using a submersible pump |
| 11/18/1998 | EP0877912A1 Strain monitoring system |
| 11/18/1998 | EP0717810B1 Method for detecting pressure measurement discontinuities caused by fluid boundary changes |
| 11/17/1998 | US5837893 Method for detecting pressure measurement discontinuities caused by fluid boundary changes |
| 11/17/1998 | US5836387 System for securing an item in a tubular channel in a wellbore |
| 11/12/1998 | WO1998050681A1 Wellbores utilizing fiber optic-based sensors and operating devices |
| 11/12/1998 | WO1998050680A2 Monitoring of downhole parameters and tools utilizing fiber optics |
| 11/10/1998 | US5834710 Acoustic pulse gun assembly |
| 11/05/1998 | WO1998049581A1 Method for determining sedimentary rock pore pressure caused by effective stress unloading |
| 11/05/1998 | CA2236755A1 Well emulsion stream sampler |
| 11/03/1998 | US5829520 Method and apparatus for testing, completion and/or maintaining wellbores using a sensor device |
| 11/03/1998 | CA2178867C Determining fluid properties from pressure, volume and temperature measurements made by electric wireline formation testing tools |
| 10/29/1998 | WO1998048146A1 A method and an apparatus for use in production tests, testing an expected permeable formation |
| 10/27/1998 | US5826662 Apparatus for testing and sampling open-hole oil and gas wells |
| 10/27/1998 | US5826651 Wellbore single trip milling |
| 10/22/1998 | WO1998046858A1 In situ measurement apparatus and method of measuring soil permeability and fluid flow |
| 10/22/1998 | WO1998046857A1 Method and apparatus which uses a combination of fluid injection and resistivity measurements |
| 10/21/1998 | EP0765430A4 Soil sampler |
| 10/21/1998 | EP0757746B1 Method for measuring formation fluids in drilling fluid |
| 10/15/1998 | WO1998045575A1 Method and apparatus for the downhole compositional analysis of formation gases |
| 10/14/1998 | EP0870901A2 Downhole tool |
| 10/14/1998 | EP0720686A4 Method and apparatus for fluid and soil sampling |
| 10/01/1998 | WO1998042948A1 Subsurface measurement apparatus, system, and process for improved well drilling, control, and production |
| 09/30/1998 | EP0866911A1 Improved measurement port coupler and probe interface |
| 09/29/1998 | US5813460 Formation evaluation tool and method for use of the same |
| 09/24/1998 | WO1998041908A1 Automated material balance system for hydrocarbon reservoirs using a genetic procedure |
| 09/16/1998 | EP0864727A2 Method and device for taking samples of soil |
| 09/15/1998 | US5809163 Method of characterizing texture heterogeneities of geological formations traversed by a borehole |
| 09/15/1998 | US5808192 Arrangement for acquiring downhole information |
| 09/15/1998 | US5807082 Automatic downhole pump assembly and method for operating the same |
| 09/15/1998 | US5806595 Wellbore milling system and method |
| 09/15/1998 | CA2093899C Shut-in tools |
| 09/11/1998 | WO1998039552A1 Samplers for high-temperature fluids |
| 09/09/1998 | CN2290694Y Sampling bottom valve of rod-less hydraulic pump |
| 09/08/1998 | US5804743 For monitoring the concentration of contaminants in groundwater |
| 09/08/1998 | US5804715 Hydrodynamic dampening system for the precise measurement of dynamic sediment pore water pressure |
| 09/08/1998 | US5803186 Formation isolation and testing apparatus and method |
| 09/08/1998 | US5803167 Computer controlled downhole tools for production well control |
| 09/02/1998 | EP0861968A2 Annulus pressure responsive tool apparatus |
| 09/01/1998 | US5799733 Method of servicing a well |
| 08/26/1998 | EP0515495B1 Well fluid sampling tool and well fluid sampling method |
| 08/25/1998 | US5798488 Drilling apparatus |
| 08/19/1998 | EP0858583A1 Strain-sensing device |
| 08/19/1998 | EP0858550A1 Sampling device |
| 08/18/1998 | US5794720 Method of assaying downhole occurrences and conditions |
| 08/18/1998 | US5794696 From a well borehole |
| 08/18/1998 | US5794695 Method and apparatus for gathering and preparing liquid samples for analysis |
| 08/18/1998 | CA2148649C Mechanical lockout for pressure responsive downhole tool |
| 08/18/1998 | CA2034263C Identifying earth stresses in acoustic well logging |
| 08/12/1998 | CA2226694A1 Method of simplifying the creation of a model which simulates a physical process in a material medium |
| 08/11/1998 | US5791414 Early evaluation formation testing system |
| 08/06/1998 | WO1998034007A1 Tool and method for drilling a lateral well |
| 08/06/1998 | WO1998034006A1 Tool for making an opening in a tubular in a wellbore |
| 08/06/1998 | DE19703483A1 Flexible ground sampling unit taking cores in controlled atmosphere |
| 08/05/1998 | EP0856636A2 Method and apparatus for testing and sampling open-hole oil and gas wells |
| 08/05/1998 | EP0558534B1 Well completion system |
| 08/04/1998 | US5789669 Method and apparatus for determining formation pressure |
| 08/04/1998 | US5789663 Porous medium test with tracer recharging and discharging through a single well |
| 07/28/1998 | US5787050 Well test imaging |
| 07/28/1998 | US5785131 Pressurized formation sample collection |
| 07/15/1998 | EP0616656B1 Processes for local ground treatment, especially testing and cleaning polluted ground |
| 07/14/1998 | US5780850 API estimate using multiple fluorescence measurements |
| 07/14/1998 | US5778993 Locking a sample tube in a downhole hammer |
| 07/07/1998 | US5778154 Advisor system and method for determining reservoir properties |
| 07/07/1998 | US5775424 Process of collecting subsurface fluid samples |
| 06/24/1998 | CN2284859Y Rotary logging tester |
| 06/23/1998 | US5770798 Variable diameter probe for detecting formation damage |
| 06/23/1998 | US5768940 Sample collector |
| 06/16/1998 | US5767680 Method for sensing and estimating the shape and location of oil-water interfaces in a well |
| 06/16/1998 | US5767400 Hydraulic test system mounted with borehole television set for simultaneous observation in front and lateral directions |
| 06/16/1998 | US5767399 Method of assaying compressive strength of rock |
| 06/16/1998 | US5765637 Multiple test cased hole formation tester with in-line perforation, sampling and hole resealing means |
| 06/16/1998 | CA2105104C Methods of perforating and testing wells using coiled tubing |
| 06/02/1998 | US5758539 Logging method and system for measuring mechanical parameters of the formations crossed through by a borehole |
| 05/28/1998 | DE19710308A1 Method for extracting soil samples and sample extraction device |
| 05/26/1998 | US5757663 Hydrocarbon reservoir connectivity tool using cells and pay indicators |
| 05/06/1998 | EP0839255A1 Safeguarded method and apparatus for fluid communication using coiled tubing, with application to drill stem testing |
| 05/05/1998 | US5746279 Method and apparatus for changing bits while drilling with a flexible shaft |
| 05/05/1998 | CA2057481C Method for characterizing subterranean reservoirs |
| 04/29/1998 | CN2280155Y Graduation checking tool of sound wave well surveying instrument |
| 04/28/1998 | US5744730 Subsurface in-situ radon gas detection/penetrometer system |
| 04/28/1998 | US5743343 Method and apparatus for fluid and soil sampling |
| 04/28/1998 | US5743334 Evaluating a hydraulic fracture treatment in a wellbore |
| 04/23/1998 | WO1998016712A1 Apparatus and method for drilling boreholes |
| 04/23/1998 | CA2218209A1 Method for determining resistivity derived porosity and porosity derived resistivity |
| 04/22/1998 | EP0836670A2 Method and system for logging mechanical parameters of formations crossed through by a borehole |
| 04/21/1998 | US5741971 Method for analyzing physical properties of materials |
| 04/21/1998 | US5741967 Method for determining optimum horizontal drilling direction and drilling horizon |
| 04/21/1998 | US5741962 Apparatus and method for analyzing a retrieving formation fluid utilizing acoustic measurements |