E21B 47 - Survey of boreholes or wells

Patents for E21B 47 - Survey of boreholes or wells (31,352)
10/2009
10/22/2009	WO2009091956A3 Apparatus and method for time measurement in downhole measurement processes
10/22/2009	WO2007013883A9 Method of estimating fracture geometry, compositions and articles used for the same
10/22/2009	US20090260881 Formation Dip Geo-Steering Method
10/22/2009	US20090260880 Method for determining a set of net present values to influence the drilling of a wellbore and increase production
10/22/2009	US20090260879 Magnetic ranging while drilling using an electric dipole source and a magnetic field sensor
10/22/2009	US20090260876 Multiple Distributed Force Measurements
10/22/2009	US20090260834 Intervention Rod
10/22/2009	US20090260807 Selective zonal testing using a coiled tubing deployed submersible pump
10/22/2009	US20090260806 Bottomhole tool and a method for enhanced oil production and stabilization of wells with high gas-to-oil ratio
10/22/2009	US20090260805 Methods of inferring flow in a wellbore
10/22/2009	US20090260804 Mobile Well Services Assembly
10/22/2009	US20090260797 Spooled Device Retaining System
10/22/2009	US20090260430 Method and Apparatus for Measurement of Formation Fluid Loss
10/22/2009	CA2721589A1 Tool and method for determining formation parameter
10/22/2009	CA2721443A1 Magnetic ranging while drilling using an electric dipole source and a magnetic field sensor
10/22/2009	CA2721441A1 Method for drilling wells in close relationship using magnetic ranging while drilling
10/22/2009	CA2721179A1 Method and apparatus for measuring return flow in a well
10/21/2009	EP2110510A1 Method and apparatus for measuring return flow in a well
10/21/2009	EP1926886B1 Apparatus and method for continuous measurement of a physical property of a drilling fluid
10/21/2009	CN201330602Y Device for measuring high viscosity thick oil flow
10/21/2009	CN201330601Y Compound logging exit density measurement device
10/21/2009	CN201330600Y Pressure tester
10/21/2009	CN201330599Y Measuring instrument for roller drill hole depth
10/21/2009	CN201330598Y Drilling water level visualizer
10/21/2009	CN101560878A Horizontal well even steam injection and test wellhead device
10/21/2009	CN101560872A Integral combined cable-passing packer for deep well
10/21/2009	CN101560871A Multi-pipe-column injection test thermal recovery wellhead device
10/20/2009	US7606666 System and method for performing oilfield drilling operations using visualization techniques
10/20/2009	US7605716 Telemetry system with an insulating connector
10/20/2009	US7604072 Method and apparatus for collecting drill bit performance data
10/20/2009	US7604050 Wellhead and control stack pressure test plug tool
10/20/2009	US7603896 Fluid flow model and method of using the same
10/20/2009	CA2568959C Collar locator for slick pump
10/20/2009	CA2544866C Fluid analysis method and apparatus
10/20/2009	CA2508374C Insulative gap sub assembly and methods
10/20/2009	CA2470487C Apparatus, method and system for digitally transmitting acoustic pulse gun signals
10/20/2009	CA2402163C Tracer injection in a production well
10/20/2009	CA2401681C Controlled downhole chemical injection
10/15/2009	WO2009126888A2 Method for characterizing a geological formation traversed by a borehole
10/15/2009	WO2009126774A2 Automated mud slowness estimation
10/15/2009	WO2009126761A2 Providing an expandable sealing element having a slot to receive a sensor array
10/15/2009	WO2009126572A2 A method and apparatus for sampling and/or testing downhole formations
10/15/2009	WO2009126430A2 Method for determining wellbore position using seismic sources and seismic receivers
10/15/2009	WO2009125293A2 Method and system for the extinction of an underwater well for the extraction of hydrocarbons under uncontrolled fluid discharge conditions
10/15/2009	WO2009125161A1 Geochemical surveillance of gas production from tight gas fields
10/15/2009	WO2009105561A3 Downhole measurement while drilling system and method
10/15/2009	WO2009105555A3 Downhole local mud weight measurement near bit
10/15/2009	WO2009069004A3 Analyzing borehole by automatically evaluating predicted borehole failure image
10/15/2009	US20090257307 Automated mud slowness estimation
10/15/2009	US20090256751 Tracking Positions of Personnel, Vehicles, and Inanimate Objects
10/15/2009	US20090255731 Real time formation pressure test and pressure integrity test
10/15/2009	US20090255730 Establishing Positions of Locating Field Detectors and Path Mapping in Underground Boring Tool Applications
10/15/2009	US20090255670 Method of Monitoring Underground Diffusion of Carbon Dioxide
10/15/2009	US20090255668 Clean Fluid Systems for Partial Monolayer Fracturing
10/15/2009	CA2720596A1 Geochemical surveillance of gas production from tight gas fields
10/15/2009	CA2685074A1 Automated mud slowness estimation
10/14/2009	CN201326414Y Inner diameter measuring device for deep hole after whole expanding
10/14/2009	CN201326413Y Combined well logging probe
10/14/2009	CN201326412Y Dual-drive combined well logging probe
10/14/2009	CN201326411Y Underground measuring instrument structure of battery-free packaging oil well
10/14/2009	CN201326410Y Tugger of logging tool
10/14/2009	CN201326409Y Device for monitoring oil production and transmission state in oil field
10/14/2009	CN201326397Y Drifting and milling combination tool
10/14/2009	CN101555788A Double-detection probe measuring and adjusting instrument and detection method thereof
10/13/2009	US7600928 System and method for performing and protecting hybrid line splices
10/13/2009	US7600583 Automated, low profile drilling/bolting module with collaring
10/13/2009	US7600582 Sonde housing
10/13/2009	US7600566 Collar locator for slick pump
10/13/2009	US7600563 Dual cylinder lift pump system and method
10/13/2009	US7600420 Apparatus and methods to perform downhole measurements associated with subterranean formation evaluation
10/13/2009	US7600419 Wellbore production tool and method
10/13/2009	CA2524681C Electrical transmission apparatus through rotating tubular members
10/13/2009	CA2509604C Downhole formation testing tool
10/13/2009	CA2491546C Integrated acoustic transducer assembly
10/13/2009	CA2490295C Packer cups
10/08/2009	WO2009091979A3 Method for 3-c 3-d wavefield decomposition
10/08/2009	WO2009091690A3 Parasitically powered signal source and method
10/08/2009	WO2009089437A3 Downhole communication system and method
10/08/2009	WO2009085812A3 Method and system to automatically correct lwd depth measurements
10/08/2009	US20090250265 Impact powered transmitter for directional drilling
10/08/2009	US20090250264 Method of Drilling and Production Hydrocarbons from Subsurface Formations
10/08/2009	US20090250213 Magneto-Optical Sensor
10/08/2009	US20090250212 Method and apparatus for balanced pressure sampling
10/08/2009	US20090250210 Device and Method For Gas Lock Detection In An Electrical Submersible Pump Assembly
10/08/2009	US20090250209 Method and tool for evaluating fluid dynamic properties of a cement annulus surrounding a casing
10/08/2009	US20090250208 Tool And Method For Evaluating Fluid Dynamic Properties Of A Cement Annulus Surrounding A Casing
10/08/2009	US20090250206 Tubing pressure insensitive actuator system and method
10/07/2009	EP2106494A2 Tractor communication/control and select fire perforating switch
10/07/2009	CN201322740Y Eddy current case damage detecting device for improving circumferential defect detection rate
10/07/2009	CN201321855Y Slender-diameter drill hole clinometer
10/07/2009	CN201321854Y Well logging instrument cable signal recovery processing unit
10/07/2009	CN201321853Y Testing device for stabilized platform
10/07/2009	CN201321850Y Energy absorption buffer device for associated operation of composite perforation and formation test
10/07/2009	CN201321844Y Screw pump working condition control device
10/07/2009	CN201321833Y 5/'casing perforation completion horizontal well composite string for mechanical layered water detection and blocking
10/07/2009	CN201321831Y Novel lubricator
10/07/2009	CN201321823Y On-site connecting joint and downhole tool employing same
10/07/2009	CN201321819Y Wellhead sliding bushing device
10/07/2009	CN101551268A Piezoelectric type infrasonic sensor capable of offsetting mechanical vibration signals
10/07/2009	CN101550827A Method and device for preventing air from leaking in manometer

1 ... 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 ... 314