| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
|---|
| 09/12/2001 | EP0764375A4 Vortex chamber mud pulser |
| 09/07/2001 | WO2001065718A2 Wireless power and communications cross-bar switch |
| 09/07/2001 | WO2001065069A1 Oilwell casing electrical power pick-off points |
| 09/07/2001 | WO2001065068A1 Wireless reservoir production control |
| 09/07/2001 | WO2001065067A1 Controllable production well packer |
| 09/07/2001 | WO2001065066A1 Wireless communication using well casing |
| 09/07/2001 | WO2001065063A1 Wireless downhole well interval inflow and injection control |
| 09/07/2001 | WO2001065062A2 Use of downhole high pressure gas in a gas-lift well |
| 09/07/2001 | WO2001065061A1 Electro-hydraulically pressurized downhole valve actuator |
| 09/07/2001 | WO2001065057A1 Combined logging and drilling system |
| 09/07/2001 | WO2001065056A1 Wireless downhole measurement and control for optimizing gas lift well and field performance |
| 09/07/2001 | WO2001065055A1 Controlled downhole chemical injection |
| 09/07/2001 | WO2001065054A1 Power generation using batteries with reconfigurable discharge |
| 09/07/2001 | WO2001065053A1 Tracer injection in a production well |
| 09/07/2001 | WO2001064813A2 Conductive medium for openhole logging and logging while drilling |
| 09/07/2001 | CA2401705A1 Wireless downhole measurement and control for optimizing gas lift well and field performance |
| 09/07/2001 | CA2401278A1 Conductive medium for openhole logging and logging while drilling |
| 09/06/2001 | US20010019106 Process and devices for characterising ground water measurement points by distinguishing ground water from subterranean water accumulation |
| 09/05/2001 | CN2446280Y Observing device for water pumping well |
| 09/04/2001 | US6285190 Skin depth compensation in underground boring applications |
| 09/04/2001 | US6285026 Borehole caliper derived from neutron porosity measurements |
| 09/04/2001 | US6283209 Flexible liner system for borehole instrumentation and sampling |
| 09/04/2001 | US6283208 Orienting tool and method |
| 08/30/2001 | WO2001063804A1 Hybrid well communication system |
| 08/30/2001 | WO2001063094A1 Hydrogen sulphide detection method and apparatus |
| 08/30/2001 | WO2001063091A1 Artificial lift apparatus with automated monitoring characteristics |
| 08/30/2001 | WO2001063089A1 Sequential hydraulic control system for use in subterranean well |
| 08/30/2001 | WO2000054009A3 Downhole depth correlation |
| 08/30/2001 | US20010017545 Tracking the positional relationship between a boring tool and one or more buried lines using a composite magnetic signal |
| 08/30/2001 | US20010017222 Directional drilling components and adaptors |
| 08/30/2001 | CA2605860A1 Integrated reservoir optimization |
| 08/30/2001 | CA2602280A1 Integrated reservoir optimization |
| 08/30/2001 | CA2400974A1 Hybrid well communication system |
| 08/29/2001 | EP1127210A1 Connector for an expandable tubing string |
| 08/29/2001 | EP0808410B1 Apparatus for determining the curvature of an elongated hole, such as a drill hole, in rock for instance |
| 08/28/2001 | US6281489 Monitoring of downhole parameters and tools utilizing fiber optics |
| 08/28/2001 | US6280874 Annular pack |
| 08/28/2001 | US6280000 Method for production of gas from a coal seam using intersecting well bores |
| 08/28/2001 | US6279668 Boring tool control using remote locator including a command generation arrangement and method |
| 08/28/2001 | US6279660 Apparatus for optimizing production of multi-phase fluid |
| 08/28/2001 | US6279392 Method and system for distributed well monitoring |
| 08/23/2001 | WO2001061144A1 Digital hydraulic well control system |
| 08/23/2001 | WO2001061141A1 Horizontal directional drilling in wells |
| 08/23/2001 | WO2001061140A1 Guidance system for horizontal drilling |
| 08/23/2001 | US20010015574 Method and system for accessing subterranean deposits from the surface |
| 08/22/2001 | EP1126129A1 Guidance system for horizontal drilling |
| 08/21/2001 | US6278937 Method and apparatus for controlling the position of floating rig |
| 08/21/2001 | US6276466 System for measuring the direction and revolution of a production string |
| 08/16/2001 | WO2001059258A1 A method and apparatus for the optimal predistortion of an electromagnetic signal in a downhole communication system |
| 08/16/2001 | US20010014257 Method of monitoring the diameter of columns made by injection |
| 08/16/2001 | US20010013412 Production well telemetry system and method |
| 08/16/2001 | US20010013411 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 08/16/2001 | US20010013410 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 08/16/2001 | EP0832345B1 Subsurface signal transmitting apparatus |
| 08/14/2001 | US6274865 Analysis of downhole OBM-contaminated formation fluid |
| 08/14/2001 | US6272916 Acoustic wave transmission system and method for transmitting an acoustic wave to a drilling metal tubular member |
| 08/14/2001 | US6272915 Dual transmitter multi-capacitance flow meter |
| 08/09/2001 | WO2001057361A1 Method and apparatus for monitoring the advance of seawater into fresh water aquifers near coastal cities |
| 08/09/2001 | WO2001057360A1 Non-intrusive pressure measurement device for subsea well casing annuli |
| 08/09/2001 | DE10004804A1 Verfahren und Vorrichtung zur Vermessung der Lage von Rohrleitungen während des unterirdischen Verlegevorgangs Method and device for measuring the location of subterranean pipes during the laying operation |
| 08/08/2001 | CN1307678A Non-intrusion fiber optic pressure-sensor for measuring unsteady pressures within pipe |
| 08/07/2001 | US6272434 Drilling system with downhole apparatus for determining parameters of interest and for adjusting drilling direction in response thereto |
| 08/07/2001 | US6269891 Through-drill string conveyed logging system |
| 08/07/2001 | US6269883 Disconnect tool |
| 08/07/2001 | CA2215888C Wellbore profiling system |
| 08/07/2001 | CA2177623C Method of determining inflow rates from underbalanced wells |
| 08/02/2001 | WO2001055749A1 Bed boundary detection and invasion profiling with uncompensated electromagnetic wave resistivity sensors |
| 08/02/2001 | WO2001055555A1 Choke inductor for wireless communication and control in a well |
| 08/02/2001 | WO2001055554A1 Downhole wireless two-way telemetry system |
| 08/02/2001 | WO2001055553A1 System and method for fluid flow optimization in a gas-lift oil well |
| 08/02/2001 | WO2001020129A3 Apparatus and methods for measuring depth |
| 08/02/2001 | WO2001018357A3 Methods and associated apparatus for downhole data retrieval, monitoring and tool actuation |
| 08/02/2001 | US20010010432 Method and system for accessing subterranean deposits from the surface |
| 07/31/2001 | US6268911 Monitoring of downhole parameters and tools utilizing fiber optics |
| 07/31/2001 | US6268727 Measurement of flow fractions flow velocities and flow rates of a multiphase fluid using ESR sensing |
| 07/31/2001 | US6267185 Apparatus and method for communication with downhole equipment using drill string rotation and gyroscopic sensors |
| 07/26/2001 | WO2001053855A1 Resistivity and dielectric constant well core measurement system for measurement while drilling and laboratory |
| 07/26/2001 | WO2001053656A1 Downhole electrical transmission system |
| 07/26/2001 | WO2000042287A9 Automated bore planning method and apparatus for horizontal directional drilling |
| 07/25/2001 | CN1305565A Method of determining azimuth of borehole |
| 07/25/2001 | CN1305564A Method and system for measuring data in fluid transportation conduit |
| 07/25/2001 | CN1305105A Heat transfer method for logging well |
| 07/25/2001 | CN1305088A Method of monitoring the diameter for cylindrical body made by injection process |
| 07/24/2001 | US6265786 Turbogenerator power control system |
| 07/24/2001 | US6263983 Apparatus for directional drilling |
| 07/24/2001 | US6263730 Downhole pump strainer data recording device and method |
| 07/24/2001 | US6263729 Method of determining the hydrocarbon flow rate in a multi-phase fluid flowing in an oil well |
| 07/24/2001 | CA2221069C Method for horizontal directional drilling of rock formations |
| 07/24/2001 | CA2221068C Drill bit for horizontal directional drilling of rock formations |
| 07/19/2001 | WO2001051898A1 Downhole densitometer |
| 07/19/2001 | WO2001051761A1 Steerable modular drilling assembly |
| 07/18/2001 | EP1116350A1 Drill string telemetry with insulator between receiver and transmitter |
| 07/18/2001 | EP1115961A1 Through-drill string conveyed logging system |
| 07/18/2001 | CN2439545Y Equipment for simulating seepage flow under high temp. and high pressure condition |
| 07/17/2001 | USRE37283 Apparatus for the remote measurement of physical parameters |
| 07/17/2001 | US6260634 Sonde housing for directional drilling |
| 07/17/2001 | US6260618 Method for locating placement of a guide stock in a multilateral well |
| 07/17/2001 | US6260616 Downhole flow control devices |
| 07/12/2001 | WO2001049972A1 Well kick detector |
| 07/12/2001 | WO2001049969A1 Flow control in a wellbore |