| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 03/12/2008 | EP1896690A2 A method and apparatus for reservoir characterization using photoacoustic spectroscopy |
| 03/12/2008 | EP1110065B1 Seismic sensing and acoustic logging systems using optical fiber, transducers and sensors |
| 03/12/2008 | CN101142498A Subsurface imagery for temperature measurement and fluid flow for oil recovery using electromagnetic impedance tomography (emit) |
| 03/12/2008 | CN101139927A High-density sampling point storing flow gage measuring inside oil conduit |
| 03/12/2008 | CN101139926A Device for measuring temperature by sound wave and method thereof |
| 03/12/2008 | CN101139925A Method for while-drilling testing reservoir parameter property and adjusting well drilling action in real time |
| 03/12/2008 | CN101139911A Gas injection pressure-stabilizing drilling method |
| 03/12/2008 | CN100374825C Impeller device for data acquisition in a flow |
| 03/12/2008 | CN100374735C Sleigh mounted electrohydraulic ratio regulating valve and system |
| 03/11/2008 | US7341117 Method and apparatus for a monodiameter wellbore, monodiameter casing, monobore, and/or monowell |
| 03/11/2008 | CA2488475C Downhole fluid pumping apparatus and method |
| 03/11/2008 | CA2468306C Subsea communications network |
| 03/11/2008 | CA2462307C Methods for determining characteristics of earth formations |
| 03/11/2008 | CA2427332C Flow controller with downhole pumping system |
| 03/11/2008 | CA2421707C Constant force actuator |
| 03/07/2008 | CA2600602A1 Annulus pressure control drilling systems and methods |
| 03/06/2008 | WO2008027652A2 Pulsed-neutron formation density |
| 03/06/2008 | WO2008027047A1 Removable coil in pipe sections of a downhole tubular |
| 03/06/2008 | WO2007147135A3 Method and system for designing and optimizing drilling and completion operations in hydrocarbon reservoirs |
| 03/06/2008 | WO2007143384A3 System and method for reducing the borehole gap for downhole formation testing sensors |
| 03/06/2008 | US20080059073 Methods and apparatus for handling and drilling with tubulars or casing |
| 03/06/2008 | US20080056067 Method of Detecting Signals in Acoustic Drill String Telemetry |
| 03/06/2008 | US20080055110 Downlink Pulser for Mud Pulse Telemetry |
| 03/06/2008 | US20080053705 Steerable bit system assembly and methods |
| 03/06/2008 | US20080053702 Assembly and Method for Determining Thermal Properties of a Formation and Forming a Liner |
| 03/06/2008 | US20080053213 Method and system for managing a drilling operation in a multicomponent particulate system |
| 03/06/2008 | CA2559226A1 Method and apparatus for well casing repair and plugging utilizing molten metal |
| 03/05/2008 | EP1759087B1 A method of filtering pump noise |
| 03/05/2008 | CN201031692Y Bridge type double leather cup testing seal segment |
| 03/05/2008 | CN201031691Y Pulley for rotary digging drilling machine main winding unit sensing device |
| 03/05/2008 | CN201031690Y Circulation cover assembly for bore mud drill following batter level |
| 03/05/2008 | CN201031689Y Centralizer for bore mud pulse drill following batter level |
| 03/05/2008 | CN201031688Y Anti-theft compensating heart device |
| 03/05/2008 | CN101135242A Oil well liquid level measuring apparatus |
| 03/04/2008 | US7340384 Process for determining the variation in the relative permeability of at least one fluid in a reservoir |
| 03/04/2008 | US7339160 Apparatus and method for analysing downhole water chemistry |
| 03/04/2008 | US7337858 Drill bit assembly adapted to provide power downhole |
| 03/04/2008 | US7337660 Method and system for reservoir characterization in connection with drilling operations |
| 03/04/2008 | CA2440994C Supplemental referencing techniques in borehole surveying |
| 02/29/2008 | CA2598702A1 Electro-optic cablehead for oil well applications |
| 02/29/2008 | CA2597236A1 Array temperature sensing method and system |
| 02/28/2008 | WO2008024868A2 Method of obtaining a treatment composition for improving the productivity of hydrocarbon producing wells |
| 02/28/2008 | WO2008024793A1 Method for logging after drilling |
| 02/28/2008 | WO2008024448A1 Non-intrusive flow indicator |
| 02/28/2008 | WO2008024147A1 Composition and method for using waxy oil-external emulsions to modify reservoir permeability profiles |
| 02/28/2008 | WO2008023256A1 Downhole tool |
| 02/28/2008 | US20080047750 Boring Tool Tracking Fundamentally Based on Drill String Length, Pitch and Roll |
| 02/28/2008 | US20080047706 Method of obtaining a treatment composition for improving the productivity of hydrocarbon producing wells |
| 02/28/2008 | US20080047705 Methods & systems for the automated operation and control of a continuous loop pump |
| 02/28/2008 | US20080047337 Early Kick Detection in an Oil and Gas Well |
| 02/28/2008 | CA2661342A1 Method for logging after drilling |
| 02/28/2008 | CA2658943A1 Composition and method for using waxy oil-external emulsions to modify reservoir permeability profiles |
| 02/27/2008 | EP1718841B1 Annular pressure relief collar |
| 02/27/2008 | EP1583886A4 Isolated electrical connection in a drill string |
| 02/27/2008 | CN201027539Y Fast logging platform of multi-drive multi-test arm |
| 02/27/2008 | CN201027521Y Split type packing device for drilling test |
| 02/27/2008 | CN101133232A Heating and cooling electrical components in a downhole operation |
| 02/26/2008 | US7334661 Acoustic logging tool sleeve |
| 02/26/2008 | US7334651 Kick warning system using high frequency fluid mode in a borehole |
| 02/26/2008 | US7334650 Apparatus and methods for drilling a wellbore using casing |
| 02/26/2008 | US7334637 Assembly and method for determining thermal properties of a formation and forming a liner |
| 02/26/2008 | CA2376211C Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 02/21/2008 | WO2008022106A1 Distributed intelligence for enhanced monitoring and control of oilfield processes |
| 02/21/2008 | WO2008021868A2 Resistivty logging with reduced dip artifacts |
| 02/21/2008 | WO2008021643A2 Sliding weight borehole gravimeter |
| 02/21/2008 | WO2008021329A1 Apparatus and methods for estimating loads and movement of members downhole |
| 02/21/2008 | WO2008020177A1 Method for determining reservoir properties in a flowing well |
| 02/21/2008 | WO2008020152A1 Communications system for an underwater fluid extraction facility |
| 02/21/2008 | WO2007089338A8 Method and apparatus for fluid influx detection while drilling |
| 02/21/2008 | WO2007081711A3 Method for determining formation fluid entry into or drilling fluid loss from a borehole using a dynamic annular pressure control system |
| 02/21/2008 | US20080042870 Method of determination of a stuck point in drill pipes by measuring the magnetic permeability of pipes |
| 02/21/2008 | US20080042869 Wireless communication system and method |
| 02/21/2008 | US20080042652 Flux Plane Locating in an Underground Drilling System |
| 02/21/2008 | US20080041626 Magnetic ranging while drilling parallel wells |
| 02/21/2008 | US20080041587 Method for logging after drilling |
| 02/21/2008 | CA2661908A1 Pressure waves decoupling with two transducers |
| 02/21/2008 | CA2658831A1 Method of applying a string of interconnected strain sensors to an object, a pliable support structure, and method of producing a mineral hydrocarbon fluid |
| 02/20/2008 | EP1890000A1 Method of determination of the stuck point in drill pipes by measuring the magnetic permeability of the said pipes |
| 02/20/2008 | CN201025027Y Well mouth pressure measurement and oil sampling valve |
| 02/20/2008 | CN201025026Y Injection and injection stop and freezing prevention pressure reading device |
| 02/20/2008 | CN201025025Y High-layer oil exploration and sealing verification assembly |
| 02/20/2008 | CN201025024Y Oil well pressure differentiation measurement device |
| 02/20/2008 | CN201025023Y Short connection node for continuous pipe measurement well instrument |
| 02/20/2008 | CN201025022Y Oil field device detection vehicle |
| 02/20/2008 | CN201024974Y Sealer for cable penetrating under well |
| 02/20/2008 | CN201024950Y Cable cutter for under-well measurement and adjustment instrument |
| 02/20/2008 | CN201024939Y Testing and unloading device for preventive petroleum pump power illustration |
| 02/19/2008 | US7333892 Method of determining multiphase flow parameters of a porous medium taking account of the local heterogeneity |
| 02/19/2008 | US7331409 Configurable beacon and method |
| 02/19/2008 | US7331387 Downhole window finder and method of using the same |
| 02/19/2008 | US7331386 Anchor arm for seismic logging tool |
| 02/19/2008 | US7331223 Method and apparatus for fast pore pressure measurement during drilling operations |
| 02/19/2008 | CA2454313C Method and apparatus for fast pore pressure measurement during drilling operations |
| 02/19/2008 | CA2445296C Apparatus and method for controlling the speed of a pump in a well |
| 02/19/2008 | CA2403060C Methods, apparatus and products useful in the operation of a sucker rod pump during the production of hydrocarbons |
| 02/16/2008 | CA2597581A1 Magnetic ranging while drilling parallel wells |
| 02/14/2008 | US20080037369 Pressure Waves Decoupling with Two Transducers |
| 02/14/2008 | US20080035376 Apparatus and Methods for Estimating Loads and Movements of Members Downhole |
| 02/14/2008 | US20080035352 Method for construction of low thermal expansion and low resistance wire for logging applications |
| 02/14/2008 | US20080035335 Method and system for evaluating and displaying depth data |