| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 08/21/2008 | CA2799564A1 Apparatus and methods of flow testing formation zones |
| 08/21/2008 | CA2708007A1 Tractor communication/control and select fire perforating switch simulations |
| 08/21/2008 | CA2677653A1 Ram bop position sensor |
| 08/20/2008 | EP1664487B1 Method for installing a double ended distributed sensing fiber optical assembly within a guide conduit |
| 08/20/2008 | CN201103392Y Pressure tapping device of oil gas well |
| 08/20/2008 | CN201103391Y Hydraulic pressure test pressurizing pump of well control device |
| 08/20/2008 | CN201103390Y Experiment detecting system for well control device |
| 08/20/2008 | CN201103389Y Optic fiber gyroscope used for optic fiber gyroscope continuous gradienter |
| 08/20/2008 | CN101245700A Borehole clinometer probe |
| 08/19/2008 | US7414405 Measurement tool for obtaining tool face on a rotating drill collar |
| 08/19/2008 | US7413021 Method and conduit for transmitting signals |
| 08/19/2008 | US7413018 Apparatus for wellbore communication |
| 08/19/2008 | US7413011 Optical fiber system and method for wellhole sensing of magnetic permeability using diffraction effect of faraday rotator |
| 08/19/2008 | US7412881 Fluid flowrate determination |
| 08/19/2008 | CA2407916C Method and apparatus for communicating with downhole devices in a wellbore |
| 08/14/2008 | WO2008097101A1 Assembly for drilling and logging, method for drilling and logging and device for electro pulse drilling |
| 08/14/2008 | WO2008051945A8 Breathable downhole fiber optic cable and a method of restoring performance |
| 08/14/2008 | WO2007098221B1 A method and apparatus for ion-selective discriminaion of fluids downhole |
| 08/14/2008 | US20080191900 Electrical isolation connector for electromagnetic gap sub |
| 08/14/2008 | US20080190605 Apparatus and methods of flow testing formation zones |
| 08/14/2008 | US20080190603 Method of fracturing a subterranean formation at optimized and pre-determined conditions |
| 08/14/2008 | US20080190190 Method and computer program product for drilling mud design optimization to maintain time-dependent stability of argillaceous formations |
| 08/13/2008 | EP1955013A1 Shape-acceleration measurement device and apparatus |
| 08/13/2008 | EP1954915A1 Method of drilling and producing hydrocarbons from subsurface formations |
| 08/13/2008 | CN201100126Y Alarm device for single well voltage leakage |
| 08/13/2008 | CN101240705A Nuclear tool |
| 08/13/2008 | CN100410489C Method and device for measuring resistivity by device near bit |
| 08/13/2008 | CN100410488C Radio electromagnetic short transmission device |
| 08/13/2008 | CN100410487C Under well pressure measuring device |
| 08/13/2008 | CN100410486C Method and device for receiving and detecting mud pressure pulse signal |
| 08/12/2008 | US7410011 Method to determine the concentration of deuterium oxide in a subterranean formation |
| 08/12/2008 | US7409989 Well jet device and the operating method thereof for logging horizontal wells |
| 08/12/2008 | US7409858 Method for monitoring fluid properties |
| 08/12/2008 | US7409774 Borehole tool |
| 08/12/2008 | CA2502591C Apparatus and methods for installing instrumentation line in a wellbore |
| 08/12/2008 | CA2495170C Wellbore communication system |
| 08/12/2008 | CA2482681C Energized slip ring assembly |
| 08/12/2008 | CA2464999C Wired casing |
| 08/12/2008 | CA2460371C High speed data communication protocol for use with em data telemetry antennae |
| 08/12/2008 | CA2455103C Linear displacement measurement method and apparatus |
| 08/12/2008 | CA2400051C Artificial lift apparatus with automated monitoring characteristics |
| 08/12/2008 | CA2299580C Live well deployment of electrical submersible pump |
| 08/09/2008 | CA2577734A1 Electrical isolation connector for electromagnetic gap sub |
| 08/07/2008 | WO2008094074A2 Method for distributing publicity messages |
| 08/07/2008 | WO2008093054A2 Systems and methods for monitoring sensor and actuator health and performance |
| 08/07/2008 | WO2008024806A8 Early kick detection in an oil and gas well |
| 08/07/2008 | US20080186024 Apparatus and method for measuring cased hole fluid flow with nmr |
| 08/07/2008 | US20080185151 Hydrocarbon production system and method of use |
| 08/07/2008 | US20080185144 Providing an expandable sealing element having a slot to receive a sensor array |
| 08/07/2008 | US20080185143 Blowout Preventer Testing System And Method |
| 08/07/2008 | US20080185142 Downhole transducer with adjacent heater |
| 08/07/2008 | US20080184787 Temperature and pressure transducer |
| 08/06/2008 | EP1953570A1 A downhole telemetry system |
| 08/06/2008 | CN201096769Y Multi-function sand prevention testing device |
| 08/06/2008 | CN201095982Y Stress wave emission device |
| 08/06/2008 | CN201095981Y Permanent magnetism short joint for well drilling |
| 08/06/2008 | CN201095980Y Oil well test device |
| 08/06/2008 | CN201095979Y Oilfield single-well liquid-gas separation sample amount contrasting correcting flux automatic gauging device |
| 08/06/2008 | CN201095978Y Well logging salvaging oil extraction vehicle |
| 08/06/2008 | CN101238465A Well modeling associated with extraction of hydrocarbons from subsurface formations |
| 08/06/2008 | CN101236664A Method and system to display well properties information |
| 08/06/2008 | CN101235714A Conductance tracking correlation method for downflow well flow measurement |
| 08/05/2008 | US7408837 Measurement while drilling tool and method |
| 08/05/2008 | US7408645 Method and apparatus for a downhole spectrometer based on tunable optical filters |
| 08/05/2008 | US7407006 System for logging formations surrounding a wellbore |
| 08/05/2008 | CA2172440C A method and apparatus for locally measuring flow parameters of a multiphase fluid |
| 07/31/2008 | WO2008091155A1 An apparatus for use when gathering parameters from a well flow and also a method of using same |
| 07/31/2008 | WO2008090006A1 A downhole telemetry system |
| 07/31/2008 | WO2008046835A3 Method of detecting a lateral boundary of a reservoir |
| 07/31/2008 | WO2007117846A3 Method and apparatus for sensing a borehole characteristic |
| 07/31/2008 | WO2006001974A3 Pressure monitoring of control lines for tool position feedback |
| 07/31/2008 | US20080183392 Downhole Multi-Phase Flow Imager |
| 07/31/2008 | US20080181555 Well Bore Sensing |
| 07/31/2008 | US20080180277 True temperature computation |
| 07/31/2008 | US20080179098 Drill Bit Assembly for Directional Drilling |
| 07/31/2008 | US20080179094 System and method for performing oilfield drilling operations using visualization techniques |
| 07/31/2008 | US20080179093 Measurement while drilling pulser with turbine power generation unit |
| 07/31/2008 | US20080179056 Systems for monitoring sensor and actuator health and performance |
| 07/31/2008 | US20080178686 Flow meter using an expanded tube section and sensitive differential pressure measurement |
| 07/31/2008 | CA2676071A1 A downhole telemetry system |
| 07/30/2008 | EP1950586A2 Self-detection of a modulating carrier and an optimum carrier in a downhole telemetry system |
| 07/30/2008 | EP1794413A4 Apparatus and method for wireline imaging in nonconductive muds |
| 07/30/2008 | EP1238483B1 Method for compensating for remote clock offset |
| 07/30/2008 | CN201092853Y Well head built-in oil-water rate detecting instrument |
| 07/30/2008 | CN201092852Y Throwing-dragging type unaflow valve blocking machine |
| 07/30/2008 | CN201092829Y Mechanical off-centering tubing anchor |
| 07/30/2008 | CN101230854A Multi-mode control method and apparatus for electrically controlling hydraulic oil pump by hydraulic drawworks |
| 07/29/2008 | US7406398 System and method for determining pump underperformance |
| 07/29/2008 | US7405998 Method and apparatus for generating fluid pressure pulses |
| 07/29/2008 | US7404456 Apparatus and method of identifying rock properties while drilling |
| 07/29/2008 | US7404455 Automatic SPT monitor |
| 07/29/2008 | CA2509603C Separable plug for use with a wellbore tool |
| 07/29/2008 | CA2472674C While drilling system and method |
| 07/29/2008 | CA2293686C Control and monitoring system for chemical treatment of an oilfield well |
| 07/24/2008 | WO2008089427A2 A system and method for determining producibility of a formation using flexural mechanical resonator measurements |
| 07/24/2008 | WO2008087282A2 Measurement device in a horizontal well |
| 07/24/2008 | WO2008087281A2 Measuring system and method for a horizontal shaft |
| 07/24/2008 | WO2008070754B1 Apparatus and method for clock shift correction for measurement-while-drilling measurements |
| 07/24/2008 | WO2008064034A3 Cement bond analysis |
| 07/24/2008 | WO2008036793A8 Downhole noise cancellation in mud-pulse telemetry |