| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 02/17/2010 | CN201407028Y Fully automatic oil well metering device |
| 02/17/2010 | CN201407027Y Intelligent metering device for oil well gas liquid |
| 02/17/2010 | CN201406994Y Device for evaluating performance of sand preventing tube |
| 02/17/2010 | CN101649737A Method for detecting perforation hole and collar in horizontal well sleeve pipe based on retractor drive current analysis |
| 02/17/2010 | CN101649736A rotary headstall |
| 02/17/2010 | CN100590293C Single driving double drawing four arms well diameter, microsphere and microelectrode pushing apparatus |
| 02/17/2010 | CN100590292C Experimental device capable of forecasting slurry performance in emulating horizontal directional drilling construction |
| 02/16/2010 | US7663371 Flux plane locating in an underground drilling system |
| 02/16/2010 | US7661475 Drill pipe conveyance system for slim logging tool |
| 02/16/2010 | CA2499792C Thermal actuated plunger |
| 02/16/2010 | CA2490107C Technique and system for measuring a characteristic in a subterranean well |
| 02/16/2010 | CA2455186C Filters for canceling multiple noise sources in borehole electromagnetic telemetry system |
| 02/15/2010 | CA2675783A1 Downhole telemetry apparatus and method |
| 02/11/2010 | WO2010017557A1 Method for testing an engineered geothermal system using one stimulated well |
| 02/11/2010 | WO2010017302A2 Heat dissipater for electronic components in downhole tools and methods for using the same |
| 02/11/2010 | WO2010016926A1 Electric dipole transmission system |
| 02/11/2010 | WO2010015793A1 Fiber splice housing |
| 02/11/2010 | WO2009129461A3 System and method for improved depth measurement correction |
| 02/11/2010 | US20100033344 Electric dipole transmission system |
| 02/11/2010 | US20100032211 Drilling apparatus for use in mining |
| 02/11/2010 | US20100032210 Monitoring Drilling Performance in a Sub-Based Unit |
| 02/11/2010 | US20100032209 Percussion assisted rotary earth bit and method of operating the same |
| 02/11/2010 | US20100032208 Drillstring Swivel Torque Monitor |
| 02/11/2010 | US20100032207 Method and System for Forming a Non-Circular Borehole |
| 02/11/2010 | US20100032156 Method for testing an engineered geothermal system using one stimulated well |
| 02/11/2010 | US20100032152 Well jet device |
| 02/11/2010 | CA2732966A1 Electric dipole transmission system |
| 02/11/2010 | CA2732894A1 Fiber splice housing |
| 02/10/2010 | EP1355169B1 Method and apparatus for controlling chemical injection of a surface treatment system |
| 02/10/2010 | CN201402338Y Temperature measuring optical cable for oilfield |
| 02/10/2010 | CN201401163Y System monitoring temperature field of frost wall by electrical resistivity |
| 02/10/2010 | CN201401162Y Plain trolley for logging devices |
| 02/10/2010 | CN201401160Y Directional well foam drainage wellbore simulation test device |
| 02/10/2010 | CN201401136Y Drilling platform coiled tubing operation lifting frame |
| 02/09/2010 | US7658227 System and method for sensing flow rate and specific gravity within a wellbore |
| 02/09/2010 | US7658226 Method of monitoring fluid placement during stimulation treatments |
| 02/09/2010 | US7658117 Flow meter using an expanded tube section and sensitive differential pressure measurement |
| 02/09/2010 | CA2422509C Real-time reservoir fracturing process |
| 02/04/2010 | WO2010014945A2 System and method for controlling the integrity of a drilling system |
| 02/04/2010 | WO2010014826A2 Apparatus and method for generating formation textural feature images |
| 02/04/2010 | WO2010014621A2 Apparatus and method for detecting poor hole cleaning and stuck pipe |
| 02/04/2010 | WO2010014521A2 Method and apparatus for imaging boreholes |
| 02/04/2010 | WO2010014095A1 Method and system of an electromagnetic telemetry repeater |
| 02/04/2010 | WO2010013004A2 Downhole communication |
| 02/04/2010 | US20100026998 Methods and apparatus for micro-imaging |
| 02/04/2010 | US20100025109 Apparatus and Method for Generating Formation Textural Feature Images |
| 02/04/2010 | US20100025048 U-Shaped fiber optical cable assembly for use in a heated well and methods for in-stalling and using the assembly |
| 02/04/2010 | US20100025033 Connection Apparatus and Method |
| 02/04/2010 | US20100025032 Methods and systems to activate downhole tools with light |
| 02/04/2010 | US20100024540 Adjustable testing tool and method of use |
| 02/04/2010 | DE102008035626A1 Geothermal-response unit has water inlet, controller for water inlet, and container for receiving adjustable amount of water, where controllable heating device is provided for transferred water |
| 02/04/2010 | CA2731932A1 Method and system of an electromagnetic telemetry repeater |
| 02/03/2010 | CN201397893Y Instrument testing lead wire transitional joint |
| 02/03/2010 | CN201397738Y Rotating transformer for well logging instrument |
| 02/03/2010 | CN201397394Y Novel four-meter glass fiber reinforced plastic hard electrode |
| 02/03/2010 | CN201397160Y Wireless transmission liquid worm gear flow collector |
| 02/03/2010 | CN201396152Y Pushing structure of acoustic logging instrument |
| 02/03/2010 | CN201396151Y Multipoint pressure testing device of full hydraulic core drilling machine |
| 02/03/2010 | CN201396150Y Integrative digital wireless thermoscope |
| 02/03/2010 | CN201396149Y Automatic continuous monitor for oil well dynamic liquid level |
| 02/03/2010 | CN201396148Y Air balancing device of automatic monitor for oil well dynamic liquid level |
| 02/03/2010 | CN201396147Y Detector for subsurface oil-water interface or gas-liquid interface |
| 02/03/2010 | CN201396146Y Mud monitoring system |
| 02/03/2010 | CN201396145Y Digital display calibration stand for borehole inclinometer |
| 02/03/2010 | CN201396144Y Multi-functional hand-held type oil field inspection apparatus |
| 02/03/2010 | CN201396143Y Multi-functional oil field on-site inspection device |
| 02/03/2010 | CN201396142Y Dual-induction probe vacuumizing and oiling device |
| 02/03/2010 | CN201396141Y Novel insulating short piece |
| 02/03/2010 | CN201396140Y Cluster well automatic well-selecting on-line metering liquid inlet tee joint |
| 02/03/2010 | CN201396139Y Cluster well automatic well-selecting on-line metering device |
| 02/03/2010 | CN201396138Y Hydraulic lift type instrument regulator |
| 02/03/2010 | CN201396137Y Organic glass oil tank |
| 02/03/2010 | CN201396136Y Core box dust cap |
| 02/03/2010 | CN201396135Y Deep hole displacement measuring point fixing device |
| 02/03/2010 | CN201396134Y Passing-through steering high-power signal source system for long-distance large-caliber oil and gas pipelines |
| 02/03/2010 | CN201396130Y Oil deposit developing simulation system |
| 02/03/2010 | CN201396097Y Eccentric wellhead for well test |
| 02/03/2010 | CN201396089Y Subsurface pressure gauge delivering and fishing device |
| 02/03/2010 | CN201396088Y Well measuring instrument conveyer |
| 02/03/2010 | CN201396079Y Bit pressure measuring pipe nipple for core drilling |
| 02/02/2010 | US7657376 Method and system for evaluating weight data from a service rig |
| 02/02/2010 | US7656161 Magnetization of target well casing strings tubulars for enhanced passive ranging |
| 02/02/2010 | US7654318 Fluid diversion measurement methods and systems |
| 02/02/2010 | US7654317 Drill hole measuring device and rock drilling unit |
| 02/02/2010 | CA2587593C Perforation logging tool and method |
| 02/02/2010 | CA2545395C Well jet device for logging horizontal wells and the operating method thereof |
| 02/02/2010 | CA2499303C A method and apparatus for dynamic checking and reporting system health |
| 02/02/2010 | CA2463257C Magnetic signalling in pipelines |
| 01/28/2010 | WO2010011402A2 Method of manufacture and the use of a functional proppant for determination of subterranean fracture geometries |
| 01/28/2010 | WO2010011395A1 System and method for detecting casing in a formation using current |
| 01/28/2010 | WO2010010487A2 System and method for drilling a borehole |
| 01/28/2010 | WO2010010455A2 System and method for automating exploration of production of subterranean resources |
| 01/28/2010 | WO2009132159A3 Position indicator for drilling tool |
| 01/28/2010 | WO2009126774A3 Automated mud slowness estimation |
| 01/28/2010 | WO2009120773A3 Method for compensating drill pipe and near-borehole effect on and electronic noise in transient resistivity measurements |
| 01/28/2010 | WO2009108254A4 Apparatus and method for sampling downhole fluids |
| 01/28/2010 | US20100023268 Multi-resolution Borehole Resistivity Imaging |
| 01/28/2010 | US20100018703 System and Methods Using Fiber Optics in Coiled Tubing |
| 01/28/2010 | US20100018702 System and method for robustly and accurately obtaining a pore pressure measurement of a subsurface formation penetrated by a wellbore |
| 01/28/2010 | US20100018701 Apparatus and method for detecting poor hole cleaning and stuck pipe |