| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 04/30/2013 | US8433520 Job monitoring methods and apparatus for logging-while-drilling equipment |
| 04/30/2013 | US8430163 Downhole acoustic sensing tool and method |
| 04/30/2013 | US8430162 Continuous downhole scale monitoring and inhibition system |
| 04/30/2013 | US8430161 Mitigation of elemental sulfur deposition during production of hydrocarbon gases |
| 04/30/2013 | US8429962 Methods and apparatus to control a formation testing operation based on a mudcake leakage |
| 04/30/2013 | CA2784972A1 Coiled member measuring device |
| 04/30/2013 | CA2605045C Real time telemetry |
| 04/28/2013 | CA2794364A1 A downhole logging tool |
| 04/27/2013 | CA2791772A1 Aircraft equipped with a buoyancy system for a rotating element |
| 04/26/2013 | CA2792908A1 Sensor mounting assembly for drill collar stabilizer |
| 04/25/2013 | WO2013058976A1 Detection and quantification of isolation defects in cement |
| 04/25/2013 | WO2013057247A2 Identifying forces in a well bore |
| 04/25/2013 | WO2013056859A1 Methods for installing and retrieving a well monitoring apparatus |
| 04/25/2013 | WO2013056858A1 Plug sensor |
| 04/25/2013 | WO2013056857A1 Plug sensor |
| 04/25/2013 | WO2013056301A1 A method for zoning a site for blasting purposes |
| 04/25/2013 | WO2013033183A3 Drilling dynamics data visualization in real time |
| 04/25/2013 | WO2013030555A3 Determining perforation orientation |
| 04/25/2013 | WO2013025528A3 Method and apparatus for calibrating deep-reading multi-component induction tools with minimal ground effects |
| 04/25/2013 | WO2013022646A3 Systems and methods for downhole communications using power cycling |
| 04/25/2013 | WO2013012832A3 Adaptive pump control for positive displacement pump failure modes |
| 04/25/2013 | WO2013008035A3 Method of acoustic surveying |
| 04/25/2013 | WO2013006735A3 A space provision system using compression devices for the reallocation of resources to new technology, brownfield and greenfield developments |
| 04/25/2013 | WO2013003152A4 Distributed sensors to measure cement state |
| 04/25/2013 | WO2013003151A3 Control of downhole safety devices |
| 04/25/2013 | WO2012177147A3 On-site real time detection of tracers |
| 04/25/2013 | WO2012174100A3 Dynamic image compression for imaging while drilling applications |
| 04/25/2013 | WO2012059738A3 Distributed fluid velocity sensor and associated method |
| 04/25/2013 | WO2012040220A3 Signal operated isolation valve |
| 04/25/2013 | US20130099935 Light Based Communication Port For Use On Downhole Tools |
| 04/25/2013 | US20130098686 Dynamic Steering Tool |
| 04/25/2013 | US20130098684 Percussion assisted rotary earth bit and method of operating the same |
| 04/25/2013 | US20130098683 System and Method for Monitoring and Controlling Underground Drilling |
| 04/25/2013 | US20130098605 Systems and methods for killing a well |
| 04/25/2013 | US20130098604 Detection and quantification of isolation defects in cement |
| 04/25/2013 | CA2852660A1 Method for installing and retrieving a well monitoring apparatus |
| 04/25/2013 | CA2852659A1 Plug sensor |
| 04/24/2013 | EP2582913A1 Mud pulse telemetry |
| 04/24/2013 | EP2582912A1 Annulus pressure setpoint correction using real time pressure while drilling measurements |
| 04/24/2013 | EP2582909A2 Controlling well operations based on monitored parameters of cement health |
| 04/24/2013 | CN202900272U Downhole drilling fluid drainage short section device |
| 04/24/2013 | CN202900265U A near-bit measurement while drilling sound wave short distance transmission device |
| 04/24/2013 | CN202900264U Bus structure for measuring signal transmission of subsurface equipment while drilling |
| 04/24/2013 | CN202900263U Multi-bus transmitter for transmission of oil extraction data on oil field |
| 04/24/2013 | CN202900262U A power-driven direct-reading testing seal examination tool |
| 04/24/2013 | CN202900261U Drilling fluid overflowing monitoring device |
| 04/24/2013 | CN202900260U Constant flow source circuit |
| 04/24/2013 | CN202900259U Simple oil well casing string pressure testing device |
| 04/24/2013 | CN202900258U Oilwell underpit pressure testing system |
| 04/24/2013 | CN202900257U Drainage pressure measuring device for measuring depression angle coal bed gas pressure |
| 04/24/2013 | CN202900256U Draining device for measuring elevation angel hole coal bed gas pressure |
| 04/24/2013 | CN202900255U 压缩气连续次声波发生装置 Compressed gas consecutive wave generating device |
| 04/24/2013 | CN202900254U Oil field explosion-proof winch sensor |
| 04/24/2013 | CN202900253U Depth and bending measuring device for mid-depth drill hole |
| 04/24/2013 | CN202900252U Low power consumption awakening at fixed time mine hydrologic monitoring device |
| 04/24/2013 | CN202900251U Drill hole angle-locating device for channeling hole |
| 04/24/2013 | CN202900250U High temperature resistance multi-parameter combined logging instrument |
| 04/24/2013 | CN202900249U Internal connection plug for headstall for testing |
| 04/24/2013 | CN202900248U Load and displacement integrated wireless indicator and detection system of belt type pumping unit |
| 04/24/2013 | CN202900247U Leather belt type oil pumping machine load sensor |
| 04/24/2013 | CN202900246U Array probe output profile logging instrument |
| 04/24/2013 | CN202900245U Oil well drilling parameter recording system |
| 04/24/2013 | CN202900244U Corrosion monitoring device for gas field water reinjection well |
| 04/24/2013 | CN202900243U Flexible weight bar for oil well testing |
| 04/24/2013 | CN202900242U ZigBee-network-based remote terminal unit (RTU) oil well remote measurement and control system |
| 04/24/2013 | CN202900241U Oil-gas-water three-phrase multifunctional detection device |
| 04/24/2013 | CN202900240U Screw pump well output profile logging instrument |
| 04/24/2013 | CN202900239U Oil field slurry flow velocity sensor |
| 04/24/2013 | CN202900238U Electric conductivity sensor for oil field mud |
| 04/24/2013 | CN202900237U Oil well flow automatic monitoring device |
| 04/24/2013 | CN202900236U Impedance type flow water cut meter |
| 04/24/2013 | CN202900235U Large slope well sand-carrying effect simulation evaluation device |
| 04/24/2013 | CN202900234U Controllable full accumulating flow ultrasonic flowmeter |
| 04/24/2013 | CN202900233U Lifting device for annular space test instrument |
| 04/24/2013 | CN202900232U Oil-water well working condition data remote transmission measuring management system |
| 04/24/2013 | CN202900227U Gas and liquid separation device for oil well |
| 04/24/2013 | CN202900201U Orientated measurement guiding butt joint device |
| 04/24/2013 | CN202900175U Gas storage suspending pressure meter manometry completion pipe string |
| 04/24/2013 | CN202900111U Slider suspension type underground positioner |
| 04/24/2013 | CN202900109U Delivery tool of oil field well drilling instrument |
| 04/24/2013 | CN103069108A Apparatus and methods for real time communication in drill strings |
| 04/24/2013 | CN103069107A Apparatus and methods for real time communication between drill bit and drilling assembly |
| 04/24/2013 | CN103069106A An expert system for selecting fit-for-purpose technologies and wells for reservoir saturation monitoring |
| 04/24/2013 | CN103064153A Well logging sensor connection packaging device suitable for temperature of 300 DEG C and pressure of 50MPa |
| 04/24/2013 | CN103061755A Short distance transmission system for wireless electromagnetic wave signals of downhole near bit and short distance transmission method |
| 04/24/2013 | CN103061754A Electromagnetic wave measurement while drilling system wireless remote receiving device and measuring method and application thereof |
| 04/24/2013 | CN103061753A Device for measuring downhole flow while drilling and monitoring early overflow |
| 04/24/2013 | CN103061752A Method and apparatus for measuring drill hole diameter by pouch |
| 04/24/2013 | CN103061751A Microballoon density hole diameter combination sidewall contact device based on hydraulic principle and logger |
| 04/24/2013 | CN103061750A Online measuring method for dynamic liquid level under sucker rod oil well |
| 04/24/2013 | CN103061749A Soft measuring method of dynamic liquid level under sucker rod oil well |
| 04/24/2013 | CN103061748A Device for measuring freezing borehole deflection |
| 04/24/2013 | CN103061747A Electronic clinometer using fixed point measuring method |
| 04/24/2013 | CN103061746A Whole-course online stress detection device for distributed optical fiber cables in downhole casing strings in oil and gas wells |
| 04/24/2013 | CN103061745A Test device and method for mechanical characteristics of simulation bottom hole assembly |
| 04/24/2013 | CN103061744A Electric imaging device and processing method thereof |
| 04/24/2013 | CN103061743A High-depth winze shaft blocking state observation monitoring method |
| 04/24/2013 | CN103061742A Method and layered tester for continuously testing rate of multilayer flow |
| 04/24/2013 | CN103061741A Weak spot torpedo |
| 04/24/2013 | CN103061740A Method of continuously measuring outputting objects of oil wells |