Patents for E21B 47 - Survey of boreholes or wells (31,352)
08/2010
08/11/2010CN101798917A Multifunctional dynamic pollution evaluation device of coalbed drilling fluid
08/10/2010US7773841 Optical turnaround
08/10/2010US7772849 Tracking positions of personnel, vehicles, and inanimate objects
08/10/2010US7772166 Conductive cement formulation and application for use in well
08/10/2010US7770663 Apparatus for making quality control measurements while drilling
08/10/2010US7770639 Method for placing downhole tools in a wellbore
08/06/2010CA2692209A1 Latch position indicator system and method
08/05/2010WO2010088679A2 Bottom hole assembly for wellbore operations
08/05/2010WO2010088542A1 Downhole pressure barrier and method for communication lines
08/05/2010WO2010088439A2 System and method for matching lithology responses of downhole tools having different source energies
08/05/2010WO2010088339A2 Hole enlargement drilling device and methods for using same
08/05/2010WO2010088228A2 Adjustable downhole motors and methods for use
08/05/2010WO2010088125A1 Electrical submersible pump rotation sensing using an xy vibration sensor
08/05/2010WO2010088119A2 Reducing error contributions to gyroscopic measurements from a wellbore survey system
08/05/2010WO2010086673A1 A riser and a method for identifying a riser
08/05/2010WO2010086671A1 A method for handling a component in the construction, maintenance and repair of wells
08/05/2010WO2010086588A2 Sensing inside and outside tubing
08/05/2010WO2010068892A3 System and method for downhole voltage generation
08/05/2010WO2010065272A3 Rotatable orientation independent gravity sensor and methods for correcting systematic errors
08/05/2010US20100198518 Reducing error contributions to gyroscopic measurements from a wellbore survey system
08/05/2010US20100195442 Mud pulse telemetry data modulation technique
08/05/2010US20100195441 Parallel-path acoustic telemetry isolation system and method
08/05/2010US20100194585 Signal processing in downhole equipment
08/05/2010US20100194395 Enhanced passive ranging methodology for well twinning
08/05/2010US20100193246 Device and Method for Measuring a Property in a Downhole Apparatus
08/05/2010US20100193193 Subterranean system and method for treating and producing oil
08/05/2010US20100193187 Downhole fluid filter
08/05/2010US20100193186 Method and apparatus to construct and log a well
08/05/2010US20100193185 Method and apparatus for rescaling measurements while drilling in different environments
08/05/2010US20100193184 System and method of monitoring flow in a wellbore
08/05/2010US20100193183 Methods and systems for managing aquifer operation
08/05/2010US20100193182 Method of optimizing production of a well
08/05/2010US20100193181 Method of running dts measurements in combination with a back pressure valve
08/05/2010US20100193177 Fluid level sensor
08/05/2010US20100192683 Portable gas monitor
08/05/2010CA2751079A1 A method for handling a component in the construction, maintenance and repair of wells
08/04/2010EP2213834A2 Reducing error contributions to gyroscopic measurements from a wellbore survey system
08/04/2010EP2213833A2 Extendable measuring device
08/04/2010EP2213831A2 Method and apparatus for measuring a parameter within the well of a plug
08/04/2010EP2213830A2 Method and apparatus for measuring a parameter within the well with a plug
08/04/2010EP2212721A2 Apparatus and method for improved light source and light detector for gravimeter
08/04/2010EP2212520A2 Electromagnetic acoustic transducer using magnetic shielding
08/04/2010EP2212512A1 Electrical contact connections for wellbore tools
08/04/2010CN201541199U Logging instrument underground backup power system occupying no cable cores
08/04/2010CN201539253U Pipe nipple for formation characteristic Tool
08/04/2010CN201539252U Storage type multi-parameter combined well measurement instrument
08/04/2010CN201539251U DTB/CAN bus signal simulator
08/04/2010CN201539250U Probe for measuring borehole temperature
08/04/2010CN201539249U Special-purpose lower sheave for downhole testing
08/04/2010CN201539248U Electromagnetic logging instrument for oilfield production well
08/04/2010CN201539247U Water injection flow testing string device
08/04/2010CN201539246U Neutron source bin with automatic position function
08/04/2010CN201539245U Logging ground system power supply and data bus anti-interference circuit
08/04/2010CN101796262A Detecting acoustic signals from a well system
08/04/2010CN101793144A Auxiliary device for improving observing effect of drilling television imaging instrument in muddy water hole
08/04/2010CN101793143A Wired pipe signal transmission testing apparatus and method
08/04/2010CN101793142A True triaxial drilling leakage blockage simulation assessment device
08/04/2010CN101793141A Mining hole depth and slope angle measuring device
08/04/2010CN101793140A Automatically timing oil meter
08/04/2010CN101793129A Drilling rig endoscope motor cable-fixing device
08/03/2010US7769549 Method and device for on-line acoustic monitoring of foam and aerated fluid properties
08/03/2010US7769260 Intervention rod
08/03/2010US7768530 Verification of process variable transmitter
08/03/2010US7768265 Flux plane locating in an underground drilling system
08/03/2010US7767461 Apparatus and method for measuring concentrations of scale-forming ions
08/03/2010US7765862 Determination of formation pressure during a drilling operation
08/03/2010CA2691773A1 Methods and systems for borehole telemetry
08/01/2010CA2691410A1 Parallel-path acoustic telemetry isolation system and method
07/2010
07/30/2010CA2691034A1 Reducing error contributions to gyroscopic measurements from a wellbore survey system
07/29/2010WO2010085170A1 Method for electrically logging cased wells
07/29/2010WO2010084376A1 Concentration of minor constituent of wellbore fluid
07/29/2010WO2009149038A8 Systems and methods for providing wireless power transmissions and tuning a transmission frequency
07/29/2010US20100187008 Phase Estimation From Rotating Sensors To Get a Toolface
07/29/2010US20100186953 Measuring a characteristic of a well proximate a region to be gravel packed
07/29/2010US20100186951 Mud cake probe extension
07/29/2010US20100186950 Geologic Features From Curvelet Based Seismic Attributes
07/29/2010US20100186949 Assembly for Controlled Delivery of Downhole Treatment Fluid
07/29/2010US20100186948 Methods and apparatus to sample heavy oil from a subteranean formation
07/29/2010US20100186944 Accessible Downhole Power Assembly
07/29/2010US20100186495 Devices and methods for formation testing by measuring pressure in an isolated variable volume
07/28/2010EP2210134A2 Hydrocarbon monitoring cable
07/28/2010EP2209967A2 Method of and apparatus for completing a well
07/28/2010CN201535161U 一种磁源信号发生器 A magnetic source signal generator
07/28/2010CN1936269B Three-layer water-searching pipe column for oil-pumping well in oil field and water-searching method
07/28/2010CN101787883A Underground instrument for magnetic coupling communication
07/28/2010CN101787882A Optical time domain reflection (OTDR) distributed optical fiber sensing system based on Brillouin scattering and subsurface temperature monitoring method using same
07/28/2010CN101787881A Shell of nitrogen pressure-transmission tube used for oilfield and welding method thereof
07/28/2010CN101787880A Measurement-while-drilling device for underground sub-horizontal directional long drill hole of cola mine
07/28/2010CN101787879A Two-segment type gyroscopic survey probe
07/28/2010CN101787878A Intelligent injection allocation instrument of water injection well
07/28/2010CN101787877A Crude-oil automatic continuous measuring device
07/28/2010CN101787874A Intelligent injection allocation testing device of water injection well
07/28/2010CN101122229B Non-metal composite material insulator and metal bonding method dedicated for petrol logging instrument
07/27/2010US7762354 Peizoelectric generator particularly for use with wellbore drilling equipment
07/27/2010US7762328 Formation testing and sampling tool including a coring device
07/27/2010US7762327 Acoustically measuring annulus probe depth
07/27/2010US7762131 System for predicting changes in a drilling event during wellbore drilling prior to the occurrence of the event
07/27/2010CA2691257A1 A method of running dts measurements in combination with a back pressure valve
07/23/2010CA2690926A1 Downhole fluid separation
07/22/2010WO2010083388A2 Estimating petrophysical parameters and invasion profile using joint induction and pressure data inversion approach