| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 08/02/2007 | US20070176603 Boring Tool Tracking/Guiding System and Method with Unconstrained Target Location Geometry |
| 08/02/2007 | US20070175663 Measuring device and drilling device for deep drillings |
| 08/02/2007 | US20070175632 Method and apparatus for insulating a resonator downhole |
| 08/02/2007 | US20070175273 Method for measuring formation properties with a time-limited formation test |
| 08/02/2007 | US20070175055 Gyroscopic Steering Tool Using Only a Two-Axis Rate Gyroscope and Deriving the Missing Third Axis |
| 08/02/2007 | CA2640535A1 Remote area sensor system |
| 08/02/2007 | CA2640125A1 Method of treating a subterranean formation using a rheology model for fluid optimization |
| 08/01/2007 | EP1813768A1 System and method for deflection compensation in power drive system for connection of tubulars |
| 08/01/2007 | EP1812683A1 System and method for wireless communication in a producing well system |
| 08/01/2007 | CN2929183Y Fluid control type underwell multiple stage tester |
| 08/01/2007 | CN2929182Y Intelligent IC card oil-gas integrating instrument |
| 08/01/2007 | CN2929162Y Wellhead in-site test pressure complete set device |
| 08/01/2007 | CN101008313A Implementation scheme for continuous testing under well using electromagnetic flow meter |
| 08/01/2007 | CN101008310A Portable hydraulic blowout preventer for water injection profile logging |
| 07/31/2007 | US7250873 Downlink pulser for mud pulse telemetry |
| 07/31/2007 | US7250768 Apparatus and method for resistivity measurements during rotational drilling |
| 07/31/2007 | US7249636 System and method for communicating along a wellbore |
| 07/31/2007 | US7249500 Determination of amount of proppant added to a fracture fluid using a coriolis flow meter |
| 07/31/2007 | CA2526193C Subsea template electromagnetic telemetry |
| 07/31/2007 | CA2490113C Method for measuring and calibrating measurements using optical fiber distributed sensor |
| 07/31/2007 | CA2454525C Apparatus and method for minimizing wear and wear related measurement error in a logging-while-drilling tool |
| 07/30/2007 | CA2726769A1 System and method for deflection compensation in power drive system for connection of tubulars |
| 07/26/2007 | WO2007084834A2 Temperature displaying fan |
| 07/26/2007 | WO2007034276B1 Apparatus for downhole fluids analysis utilizing micro electro mechanical systems (mems) or other sensors |
| 07/26/2007 | WO2007014111A9 Downhole tool position sensing system |
| 07/26/2007 | US20070171402 Direct measurement of brillouin frequency in destributed optical sensing systems |
| 07/26/2007 | US20070169933 Sensor assembly for determining fluid properties in a subsurface well |
| 07/26/2007 | US20070169932 Method of Treating a Subterranean Formation using a Rheology Model for Fluid Optimization |
| 07/26/2007 | US20070169542 Blast movement monitor |
| 07/26/2007 | US20070169540 Method and apparatus for determining gas content of subsurface fluids for oil and gas exploration |
| 07/25/2007 | EP1534928B1 Signal transmission system |
| 07/25/2007 | EP1511912B1 Downhole tool deployment safety system and methods |
| 07/25/2007 | CN2926502Y Ultra-sonic Doppler underwell flowmeter |
| 07/25/2007 | CN2926501Y Underwell TV-imaging logging system |
| 07/25/2007 | CN1328473C Joint for wire pipe and current loop inductive coupler |
| 07/25/2007 | CN1328471C Application of drilling system and method of drilling |
| 07/25/2007 | CN101006248A Apparatus and methods for positioning in a borehole |
| 07/24/2007 | US7248178 RF communication with downhole equipment |
| 07/24/2007 | US7246825 Erosion-indicating safety fitting |
| 07/24/2007 | US7246663 Positive engagement indicator for wireline fishing operations |
| 07/24/2007 | US7246662 Systems and methods for controlling flow control devices |
| 07/24/2007 | CA2483023C Method and system for accessing subterranean deposits from the surface |
| 07/24/2007 | CA2288784C Monitoring of downhole parameters and tools utilizing fiber optics |
| 07/19/2007 | WO2007082024A2 Sensor assembly for determining fluid properties in a subsurface well |
| 07/19/2007 | WO2007081711A2 Method for determining formation fluid entry into or drilling fluid loss from a borehole using a dynamic annular pressure control system |
| 07/19/2007 | WO2007081577A2 Method to detect low salinity injection water encroachment into oil formations |
| 07/19/2007 | WO2007080080A1 A device and method of measuring depth and azimuth |
| 07/19/2007 | US20070168132 Wellbore communication system and method |
| 07/19/2007 | US20070166148 Temperature displaying fan |
| 07/19/2007 | US20070163806 Underground boring machine and method for controlling underground boring |
| 07/19/2007 | US20070163780 Method and system for monitoring the incursion of particulate material into a well casing within hydrocarbon bearing formations including gas hydrates |
| 07/19/2007 | US20070163779 Compositions containing a buffer and a peroxide or peracid useful for treating wells |
| 07/19/2007 | CA2635967A1 A device and method of measuring depth and azimuth |
| 07/18/2007 | EP1527234B1 Method and device for soil analysis |
| 07/18/2007 | CN2924004Y Logging radiation-resource intelligent mounting-dismounting device |
| 07/18/2007 | CN2924003Y High-temperature direct-reading temperature instrument |
| 07/18/2007 | CN2924002Y Well-drilling depth measuring device |
| 07/18/2007 | CN2924001Y Screw-pump oil-production well polish-rod verticality measuring gauge |
| 07/18/2007 | CN2924000Y Multi-path automatic metering distribution device |
| 07/18/2007 | CN2923999Y Oil-well automatic metering device |
| 07/18/2007 | CN100999993A Mechanical pipe pole connecting hoop detecting apparatus for working with pressure |
| 07/18/2007 | CN100999992A Method for transferring steam driven at thickened oil steam taking-in and sending-out later period post |
| 07/17/2007 | US7245229 Drill string rotation encoding |
| 07/17/2007 | US7243735 Wellbore operations monitoring and control systems and methods |
| 07/17/2007 | US7243719 Control method for downhole steering tool |
| 07/17/2007 | US7243718 Methods for locating formation fractures and monitoring well completion using streaming potential transients information |
| 07/17/2007 | US7243537 Methods for measuring a formation supercharge pressure |
| 07/17/2007 | CA2536716C Expanded threaded connection with seal at interface |
| 07/17/2007 | CA2526227C Expandable connector for borehole tubes |
| 07/17/2007 | CA2438173C Tubing elongation correction system and methods |
| 07/17/2007 | CA2428692C Method and apparatus for lwd shear velocity measurement |
| 07/17/2007 | CA2392618C Improved method and apparatus for predicting the fluid characteristics in a well hole |
| 07/17/2007 | CA2259852C Wireless coiled tubing joint locator |
| 07/13/2007 | CA2573467A1 Computer-based method for while-drilling modeling and visualization of layered subterranean earth formations |
| 07/13/2007 | CA2568365A1 Testing, treating, or producing a multi-zone well |
| 07/12/2007 | WO2007077411A1 Wellbore intervention tool |
| 07/12/2007 | WO2007077311A1 Method and device for determining the location of the sticking point of a rod made of magnetorestrictive material located in a well |
| 07/12/2007 | US20070158064 Method of determining a fluid inflow profile of wellbore |
| 07/12/2007 | DE10313912B4 Vorrichtung zum Bestimmen des Durchmessers bzw. Radius von Hohlräumen Apparatus for determining the diameter or radius of cavities |
| 07/11/2007 | EP1806473A1 A device and method of measuring depth and azimuth |
| 07/11/2007 | EP1805534A2 System and method for wireless data transmission |
| 07/11/2007 | EP1805393A1 Methods and systems for reverse-circulation cementing in subterranean formations |
| 07/11/2007 | EP1588018B1 Data transmission system for a downhole component |
| 07/11/2007 | CN2921275Y Rotary valve type slurry positive pulse generator |
| 07/11/2007 | CN2921274Y Combined well head connector |
| 07/11/2007 | CN2921273Y Self-floating fishing device |
| 07/11/2007 | CN2921257Y Centering guide for wellhole verticality measurement |
| 07/11/2007 | CN1997916A Acoustic telemetry transceiver |
| 07/11/2007 | CN1997915A Downhole signal source |
| 07/11/2007 | CN1997808A Method and system for inserting a fiber optical sensing cable into an underwater well |
| 07/11/2007 | CN1996010A Visualized pore-level planar model making method |
| 07/11/2007 | CN1995926A High-temperature-resistant high-pressure-resistant ceramic strain gauge sensor and its package curing method |
| 07/11/2007 | CN1995925A Non-packer silo vortex shedding flowmeter |
| 07/11/2007 | CN1325757C Layer testing technology and apparatus for loose sand gas-field gas-production well oil-casing |
| 07/11/2007 | CN1325746C An erectable arm assembly for use in boreholes |
| 07/10/2007 | US7243028 Methods and apparatus for reducing electromagnetic signal noise |
| 07/10/2007 | US7242317 Wireless well communication system and method |
| 07/10/2007 | US7242194 Formation imaging while drilling in non-conductive fluids |
| 07/10/2007 | US7240738 Self-orienting selectable locating collet and method for location within a wellbore |
| 07/10/2007 | US7240730 Use of fiber optics in deviated flows |