| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 07/10/2007 | US7240547 Method and apparatus for measuring fluid properties |
| 07/10/2007 | CA2411880C Method and apparatus for downhole fluid pressure signal generation and transmission |
| 07/05/2007 | WO2007075756A2 Method and apparatus for investigating a borehole with a caliper |
| 07/05/2007 | WO2007073575A1 Magnetic beacon guidance system |
| 07/05/2007 | US20070153626 Method and apparatus for investigating a borehole with a caliper |
| 07/05/2007 | US20070151763 Drilling system and method |
| 07/05/2007 | US20070151762 Method for determining formation fluid entry into or drilling fluid loss from a borehole using a dynamic annular pressure control system |
| 07/05/2007 | US20070151761 Automated drill string position survey |
| 07/05/2007 | US20070151728 Method to detect low salinity injection water encroachment into oil formations |
| 07/05/2007 | US20070151471 Method for determining the movement of a blast movement monitor and associated rock as a result of blasting operations |
| 07/05/2007 | US20070151345 Blast Movement Monitor |
| 07/05/2007 | CA2632687A1 Method and apparatus for investigating a borehole with a caliper |
| 07/04/2007 | EP1803001A1 Method for hydrocarbon reservoir monitoring |
| 07/04/2007 | CN2919277Y Flow combining resistance type water flow complex measuring probe |
| 07/04/2007 | CN2918729Y Multiple-directional sensor measuring drill hole wall by ultrasonic |
| 07/04/2007 | CN1993533A System and methods using fiber optics in coiled tubing |
| 07/04/2007 | CN1991128A Well depth monitoring method and device |
| 07/04/2007 | CN1324218C Bulged single-hinged scored rupture disc having a non-circular varying depth score line |
| 07/03/2007 | US7239145 Subsurface electromagnetic measurements using cross-magnetic dipoles |
| 07/03/2007 | US7239132 Apparatus detecting relative body movement |
| 07/03/2007 | US7237626 Tool module connector for use in directional drilling |
| 07/03/2007 | US7237624 Electronic roll indexing compensation in a drilling system and method |
| 07/03/2007 | US7237616 Actuator module to operate a downhole tool |
| 07/03/2007 | CA2468729C Reverse section milling method and apparatus |
| 07/03/2007 | CA2442475C Smart cementing systems |
| 07/03/2007 | CA2426522C One cone bit with interchangeable cutting structures, a box-end connection, and integral sensory devices |
| 07/03/2007 | CA2306739C Scoop for use with an anchor system for supporting a whipstock |
| 07/03/2007 | CA2276449C Apparatus for enhancing strain in intrinsic fiber optic sensors and packaging same for harsh environments |
| 06/28/2007 | WO2007073430A1 Method of drilling and producing hydrocarbons from subsurface formations |
| 06/28/2007 | WO2007072173A1 Method and system for monitoring the incursion of particulate material into a well casing within hydrocarbon bearing formations including gas hydrates |
| 06/28/2007 | WO2007033024A3 Method and system for evaluating weight data from service rig |
| 06/28/2007 | WO2006075337A3 Apparatus and method for monitoring remotely located sucker rod pumps |
| 06/28/2007 | US20070144782 Apparatus and Method of Controlling Motion and Vibration of an NMR Sensor in a Drilling BHA |
| 06/28/2007 | US20070144781 Instrumented drill head, related drilling/bolting machines, and methods |
| 06/28/2007 | US20070144741 Method and system for tool orientation and positioning and particulate material protection within a well casing for producing hydrocarbon bearing formations including gas hydrates |
| 06/28/2007 | US20070144740 Method and Apparatus for Fluid Influx Detection While Drilling |
| 06/28/2007 | US20070144739 Blending system for solid/fluids mixtures |
| 06/28/2007 | US20070144738 Method and system for development of hydrocarbon bearing formations including depressurization of gas hydrates |
| 06/28/2007 | US20070144737 Tracer injector tool for well investigation |
| 06/28/2007 | US20070144736 Low density proppant particles and use thereof |
| 06/28/2007 | US20070144732 Low temperature barriers for use with in situ processes |
| 06/28/2007 | CA2633747A1 Method and system for monitoring the incursion of particulate material into a well casing within hydrocarbon bearing formations including gas hydrates |
| 06/28/2007 | CA2630446A1 System and method for determining onset of failure modes in a positive displacement pump |
| 06/27/2007 | EP1799964A2 Measurement while drilling bi-directional pulser operating in a near laminar annular flow channel |
| 06/27/2007 | CN2916128Y Horizontal well lead mold |
| 06/27/2007 | CN2916127Y Hydraulic uncured-tube type lead mould |
| 06/27/2007 | CN2916126Y Separated movable blowout prevention pipe facilitating oilfield injection well testing |
| 06/27/2007 | CN2916125Y Salvageable small-diameter constant-pulse-amplitude wireless logging-while-drilling instrument |
| 06/27/2007 | CN1323223C Device for measuring multiphase fluid of water, sand and air in air well drilling and its method |
| 06/26/2007 | US7236886 Multiscale multidimensional well log data inversion and deep formation imaging method |
| 06/26/2007 | US7234543 Systems and methods for directionally drilling a borehole using a continuously variable transmission |
| 06/26/2007 | US7234540 Gyroscopic steering tool using only a two-axis rate gyroscope and deriving the missing third axis |
| 06/26/2007 | US7234539 Method and apparatus for rescaling measurements while drilling in different environments |
| 06/26/2007 | US7234520 Well jet device for testing and studying formations and the operating method thereof |
| 06/26/2007 | US7234519 Flexible piezoelectric for downhole sensing, actuation and health monitoring |
| 06/26/2007 | US7234517 System and method for sensing load on a downhole tool |
| 06/26/2007 | CA2410168C Structures and methods for damping tool waves particularly for acoustic logging tools |
| 06/26/2007 | CA2339944C Hydraulic well control system |
| 06/26/2007 | CA2271795C Whipstock |
| 06/26/2007 | CA2247834C Computer controlled downhole safety valve system |
| 06/26/2007 | CA2185409C Attenuator for borehole acoustic waves |
| 06/21/2007 | WO2007069993A1 Drill rig system |
| 06/21/2007 | WO2007068877A1 Methods and systems for robust and accurate determination of wireline depth in a borehole |
| 06/21/2007 | US20070143023 Reservoir Sample Chain-of-Custody |
| 06/21/2007 | US20070139217 Data relay system for casing mounted sensors, actuators and generators |
| 06/21/2007 | US20070137898 Automatic downlink system |
| 06/21/2007 | US20070137893 Method of Drilling Using Pulsed Electric Drilling |
| 06/21/2007 | US20070137858 Method for extraction of hydrocarbon fuels or contaminants using electrical energy and critical fluids |
| 06/21/2007 | US20070137857 Low temperature monitoring system for subsurface barriers |
| 06/21/2007 | US20070137854 Resistivity Tool with Selectable Depths of Investigation |
| 06/21/2007 | US20070137853 Combined telemetry system and method |
| 06/21/2007 | US20070137292 Methods and apparatus for oil composition determination |
| 06/21/2007 | US20070137291 Tubing expansion |
| 06/21/2007 | CA2633597A1 Methods and systems for robust and accurate determination of wireline depth in a borehole |
| 06/20/2007 | EP1797461A1 Surface instrumentation configuration for a drilling rig operation |
| 06/20/2007 | CN2913605Y Single conductor cable data transmission system |
| 06/20/2007 | CN2913604Y Oil conduit leakage checking device |
| 06/20/2007 | CN2913603Y Slip type down-hole instrument hanger |
| 06/20/2007 | CN2913602Y Experimental perforating butt and experimental perforating tool for simulating down-hole perforating conditions |
| 06/20/2007 | CN2913588Y Multifunctional oil-collecting control device for oil extraction pore |
| 06/20/2007 | CN1982648A Data collecting system at bottom of unbalancing borehole |
| 06/20/2007 | CN1322302C Three flap type guiding chain |
| 06/19/2007 | US7231973 Viscosity control and filtration of well fluids |
| 06/19/2007 | US7231972 Integral flush gauge cable apparatus and method |
| 06/19/2007 | US7231818 Determining horizontal and vertical permeabilities by analyzing two pretests in a horizontal well |
| 06/14/2007 | WO2007067544A2 Apparatus, system and method for installing boreholes from a main wellbore |
| 06/14/2007 | WO2007033126A3 Measurement while drilling apparatus and method of using the same |
| 06/14/2007 | WO2007030427A3 System and method for monitoring a well by means of an optical fiber |
| 06/14/2007 | US20070132605 Casing mounted sensors, actuators and generators |
| 06/14/2007 | US20070131430 Well jet device for logging horizontal wells and the operating method thereof |
| 06/14/2007 | US20070131418 Methods and systems for robust and accurate determination of wireline depth in a borehole |
| 06/14/2007 | US20070131417 Casing resonant radial flexural modes in cement bond evaluation |
| 06/14/2007 | US20070131416 Apparatus for gripping a tubular on a drilling rig |
| 06/14/2007 | DE4291022B4 Kurzstreckenübertragungsverbindung für ein Tiefen-MWD-System Short-range communication link for a depth-MWD system |
| 06/14/2007 | CA2628609A1 Apparatus, system and method for installing boreholes from a main wellbore |
| 06/13/2007 | EP1795919A2 Casing resonant radial flexural modes in cement bond evaluation |
| 06/13/2007 | EP1794413A2 Apparatus and method for wireline imaging in nonconductive muds |
| 06/13/2007 | EP1794410A2 Single solenoid guide system |
| 06/13/2007 | CN1981110A Monitoring fluid pressure in a well and retrievable pressure sensor assembly for use in the method |
| 06/12/2007 | US7230880 Rotational pulsation system and method for communicating |