| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 12/03/2009 | WO2009146127A2 Tool and method for evaluating fluid dynamic properties of a cement annulus surrounding a casing |
| 12/03/2009 | WO2009146103A2 Control of downhole devices in a wellbore |
| 12/03/2009 | WO2009144585A2 Downhole sensor system |
| 12/03/2009 | WO2009117206A3 Method and apparatus for measuring true vertical depth in a borehole |
| 12/03/2009 | WO2009108881A3 System and method to locate, monitor and quantify friction between a drillstring and a wellbore |
| 12/03/2009 | WO2009105660A3 Distributed sensors for dynamics modeling |
| 12/03/2009 | WO2009105659A3 Echo-decay-acceleration data acquisition method for gas identification using a low-field gradient |
| 12/03/2009 | WO2009102735A3 Downhole washout detection system and method |
| 12/03/2009 | WO2009076338A3 Methods and apparatus to configure drillstring communications |
| 12/03/2009 | US20090297273 Apparatus and method for monitoring tunnel boring efficiency |
| 12/03/2009 | US20090294174 Downhole sensor system |
| 12/03/2009 | US20090294124 System and method for shifting a tool in a well |
| 12/03/2009 | US20090294123 Multi-point injection system for oilfield operations |
| 12/03/2009 | US20090294122 Flow simulation in a well or pipe |
| 12/03/2009 | US20090293640 System and method for deflection compensation in power drive system for connection of tubulars |
| 12/02/2009 | EP2126612A1 Fluid level sensing device and methods of using same |
| 12/02/2009 | CN201354634Y Offshore oilfield water injection flow-limiting pressure-limiting device |
| 12/02/2009 | CN201354633Y Online measuring device of dynamic liquid level of sucker-rod pump well |
| 12/02/2009 | CN201354632Y Fixed seat of connecting plug of wireless measurement while drilling clinometer |
| 12/02/2009 | CN201354631Y Mechanical throwing-in and pulling gas well underground releasing testing tool |
| 12/02/2009 | CN201354630Y Metering jet with marked aperture |
| 12/02/2009 | CN201354620Y Pressure-measurement stopcock |
| 12/02/2009 | CN101592031A A combined propagation and lateral resistivity downhole tool |
| 12/02/2009 | CN101592030A Method for controlling reasonable driving depth of offshore cluster well group risers |
| 12/02/2009 | CN101592029A Method for well logging with induced polarization spectrum |
| 12/02/2009 | CN100564797C System for accommodating insert tool |
| 12/02/2009 | CN100564796C Method and system for determination of borehole geometry inside cased wells |
| 12/01/2009 | US7624816 Configurable beacon and method |
| 12/01/2009 | US7624801 Control system and method for controlling a hybrid petroleum extractor/power generator |
| 12/01/2009 | US7624800 System and method for sensing parameters in a wellbore |
| 12/01/2009 | US7624794 Non-conductive and non-magnetic flowline for electromagnetic measurements on reservoir fluids at high pressures |
| 12/01/2009 | CA2586099C System and method for pressure testing communication lines of a well tool |
| 12/01/2009 | CA2585286C System and method for pressure testing communication lines of a well tool |
| 12/01/2009 | CA2559519C Wellsite communication system and method |
| 12/01/2009 | CA2461973C Sand monitoring within wells using acoustic arrays |
| 12/01/2009 | CA2424228C Method and apparatus for integrated horizontal selective testing of wells |
| 11/26/2009 | WO2009142873A1 Downhole measurement of formation characteristics while drilling |
| 11/26/2009 | WO2009142868A2 Drilling wells in compartmentalized reservoirs |
| 11/26/2009 | WO2009142840A2 Methods and apparatus to form a well |
| 11/26/2009 | WO2009142782A2 System and method for densely packing wells using magnetic ranging while drilling |
| 11/26/2009 | WO2009141160A2 System and method for depth measurement and correction during subsea intervention operations |
| 11/26/2009 | WO2009108596A3 Method of determining a transient electromagnetic response of a formation |
| 11/26/2009 | WO2009103059A3 Real time misalignment correction of inclination and azimuth measurements |
| 11/26/2009 | WO2009097507A3 Methodology for interpretation and analysis of nmr distributions |
| 11/26/2009 | WO2009097392A3 Characterization of fracture length and formation resistivity from array induction data |
| 11/26/2009 | WO2009074884A3 Method and apparatus for detecting defects in oilfield tubulars |
| 11/26/2009 | WO2009047781A3 A nano-robots system and methods for well logging and borehole measurements |
| 11/26/2009 | US20090289627 Method of determining a formation parameter |
| 11/26/2009 | US20090288836 Apparatus and Methods for Subsea Control System Testing |
| 11/26/2009 | US20090288835 System and method for depth measurement and correction during subsea intrevention operations |
| 11/26/2009 | US20090288824 Multi-zone formation fluid evaluation system and method for use of same |
| 11/26/2009 | US20090288822 Mitigation of elemental sulfur deposition during production of hydrocarbon gases |
| 11/26/2009 | US20090288820 Method Of Manufacture And The Use Of A Functional Proppant For Determination Of Subterranean Fracture Geometries |
| 11/26/2009 | CA2725414A1 System and method for densely packing wells using magnetic ranging while drilling |
| 11/26/2009 | CA2725133A1 Drilling wells in compartmentalized reservoirs |
| 11/25/2009 | EP2122118A2 Measurement device in a horizontal well |
| 11/25/2009 | EP2122109A1 Method and apparatus for collecting drill bit performance data |
| 11/25/2009 | CN201351492Y Dispensing tool for gas drilling test instrument |
| 11/25/2009 | CN201351491Y Cored flexible nipple for horizontal well logging |
| 11/25/2009 | CN201351475Y Water injection well test plug |
| 11/25/2009 | CN101588027A Hydraulic cutting device of an oil well logging perforation cable |
| 11/25/2009 | CN101587760A Cable of downhole monitoring system of horizontal steam injection well and preparing method thereof |
| 11/25/2009 | CN101586459A Deep well grouting pressure reduction system for underground pressure measurement and ground throttle control |
| 11/25/2009 | CN101586458A Energy saving and efficiency increasing system for output well and (or) injection well |
| 11/24/2009 | US7623961 Method for determining a track of a geographical trajectory |
| 11/24/2009 | CA2491558C Acoustic transducers for tubulars |
| 11/19/2009 | WO2009140262A1 Formation testing apparatus and methods |
| 11/19/2009 | WO2009140044A2 Acoustic and fiber optic network for use in laterals downhole |
| 11/19/2009 | WO2009139705A1 A bottom-hole assembly, and a method and system for transmitting data from a bottom-hole assembly |
| 11/19/2009 | WO2009138842A1 Method and system for azimuth measurements using gyro sensors |
| 11/19/2009 | WO2009075777A3 Method and system for delineating a second wellbore from a first wellbore |
| 11/19/2009 | US20090285054 Downhole Telemetry System and Method |
| 11/19/2009 | US20090283691 Neutron shielding for downhole tool |
| 11/19/2009 | US20090283323 System and method for improved depth measurement correction |
| 11/19/2009 | US20090283322 Drilling String Back off Sub Apparatus and Method for Making and Using Same |
| 11/19/2009 | US20090283266 Apparatus and method for formation evaluation |
| 11/19/2009 | US20090283264 Systems, methods and apparatuses for monitoring and recovery of petroleum from earth formations |
| 11/19/2009 | US20090283263 Systems, methods and apparatuses for monitoring and recovery of petroleum from earth formations |
| 11/19/2009 | US20090283261 Continuous fibers for use in well completion, intervention, and other subterranean applications |
| 11/19/2009 | US20090283260 Methods of Initiating Intersecting Fractures Using Explosive and Cryogenic Means |
| 11/19/2009 | US20090283259 Sensing and monitoring of elongated structures |
| 11/19/2009 | US20090282907 Methods and apparatus to control a formation testing operation based on a mudcake leakage |
| 11/19/2009 | CA2724452A1 A bottom-hole assembly, and a method and system for transmitting data from a bottom-hole assembly |
| 11/18/2009 | EP2118442A1 Fracture testing apparatus and method |
| 11/18/2009 | EP2118437A2 Reservoir stimulation while running casing related applications |
| 11/18/2009 | CN201348599Y Differential pressure density instrument |
| 11/18/2009 | CN201347773Y Liquid-level alarming system based on PLC (programmable logic controller) control for drilling mud storage tank |
| 11/18/2009 | CN201347758Y Special tool for caliper maintenance |
| 11/18/2009 | CN201347757Y Oil well low power consumption wireless pressure sensor |
| 11/18/2009 | CN201347756Y Down-hole while-drilling pressure gauge encapsulation drum |
| 11/18/2009 | CN201347755Y Direct-reading type underground pressure gauge |
| 11/18/2009 | CN201347754Y Pressure channel plugging device |
| 11/18/2009 | CN201347753Y Noiseless bullet level surface echo sounder |
| 11/18/2009 | CN201347752Y Connection plug of wireless directional tool |
| 11/18/2009 | CN201347751Y Circulating sleeve for wireless directional tool |
| 11/18/2009 | CN201347750Y Battery damping device of wireless directional tool |
| 11/18/2009 | CN201347749Y Device for detecting sand production rate in oil field high-viscosity oil production |
| 11/18/2009 | CN201347742Y Sand prevention device for liquid level meter of oil-gas separator |
| 11/18/2009 | CN101583885A Automatic adjustment of NMR pulse sequence to optimize SNR based on real time analysis |
| 11/18/2009 | CN101582724A Method for modeling seamless acoustic transmission channel of periodic drill rod |