| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 04/11/2013 | WO2013052159A1 Fast mud gas logging using tandem mass spectroscopy |
| 04/11/2013 | WO2013052038A1 Debris resistant internal tubular testing system |
| 04/11/2013 | WO2013051958A1 Method for reviving the working condition of a well and technical complex for the implementation of same |
| 04/11/2013 | WO2013050989A1 Testing while fracturing while drilling |
| 04/11/2013 | WO2013050948A1 Electronics package for high temperature downhole applications |
| 04/11/2013 | WO2013050791A1 Method and apparatus for determining topography within a wellbore environment |
| 04/11/2013 | WO2013050746A1 A well fluid heat exchange system, a control assembly and method thereof |
| 04/11/2013 | WO2013050051A1 Subsea retrievable pressure sensor |
| 04/11/2013 | WO2012028848A3 Systems and methods for monitoring a parameter of a subterranean formation using swellable materials |
| 04/11/2013 | US20130090855 Methods for evaluating inflow and outflow in a subterraean wellbore |
| 04/11/2013 | US20130089439 Delivery device having a connecting rod, and a method for controlling a delivery device having a connecting rod and at least one balance weight |
| 04/11/2013 | US20130087328 Downhole Species Selective Optical Fiber Sensor Systems and Methods |
| 04/11/2013 | US20130087327 Using dielectric properties of an insulated conductor in a subsurface formation to assess properties of the insulated conductor |
| 04/11/2013 | US20130087325 Method For Real-Time Monitoring and Transmitting Hydraulic Fracture Seismic Events to Surface Using the Pilot Hole of the Treatment Well as the Monitoring Well |
| 04/11/2013 | CA2846968A1 Methods and apparatus having borehole seismic waveform compression |
| 04/10/2013 | EP2577228A1 Down hole surveying tool |
| 04/10/2013 | EP2576981A1 Through the drill string or core bit dst system |
| 04/10/2013 | EP2576980A2 Surface detection of failed open-hole packers using tubing with external tracer coatings |
| 04/10/2013 | EP2576979A1 Assembly and method for multi-zone fracture stimulation of a reservoir using autonomous tubular units |
| 04/10/2013 | EP2576978A1 Sensor device for a down hole surveying tool |
| 04/10/2013 | EP2576977A2 Downhole orientation sensing with nuclear spin gyroscope |
| 04/10/2013 | EP2576976A1 A wellbore surveillance system |
| 04/10/2013 | CN202872760U Discriminating frequency divider high-temperature thick film integrated circuit |
| 04/10/2013 | CN202869428U Automatic measurement device for pipe column trips |
| 04/10/2013 | CN202867491U Rock debris preventing port screw |
| 04/10/2013 | CN202866803U High-temperature thick-film integrated circuit for temperature measurement of resistivity log |
| 04/10/2013 | CN202866800U Horizontal well plugging simulation experiment device |
| 04/10/2013 | CN202866799U Measurement while drilling (MWD) wireless pressure sensor transmission set for petroleum drilling |
| 04/10/2013 | CN202866798U Transmission device used for measurement while drilling in well logging field |
| 04/10/2013 | CN202866797U Digital hydraulic fracturing fissure real-time monitoring system |
| 04/10/2013 | CN202866796U Three-phase flow simulator of oil, gas, and water in oil well |
| 04/10/2013 | CN202866795U Position detector for dislocation and offcenter of mechanical horizontal well sleeve pipe |
| 04/10/2013 | CN202866794U Measurement transmission device used on oil field logging instrument |
| 04/10/2013 | CN202866793U Enhanced four-arm well diameter well logger |
| 04/10/2013 | CN202866792U Four-arm hole diameter logging instrument |
| 04/10/2013 | CN202866791U Split-type deep well pressure gauge |
| 04/10/2013 | CN202866790U Coal mine downhole drilling depth real-time detection device |
| 04/10/2013 | CN202866789U Inclinometer sensor assembly of 200 DEG C |
| 04/10/2013 | CN202866788U High temperature constant flow source thick film integrated circuit |
| 04/10/2013 | CN202866787U Whole course visible experiment device for displacement of reservoir oil of high-pressure gas injection |
| 04/10/2013 | CN202866786U Oil well metering device |
| 04/10/2013 | CN202866785U Circuit switching and mud flow guiding integrated device of measuring instrument while drilling |
| 04/10/2013 | CN202866784U Magnetic induction liquid level interfacial instrument |
| 04/10/2013 | CN202866783U Thick film integrated circuit for high temperature mud resistivity logging |
| 04/10/2013 | CN202866782U Well drilling well control parameter intelligent monitoring system |
| 04/10/2013 | CN202866776U Thick oil viscosity reduction simulation device in shaft lifting process |
| 04/10/2013 | CN202866767U Coal bed gas production monitoring device of coal bed gas horizontal well mouth |
| 04/10/2013 | CN202866716U Movable drill clinometer probe catcher |
| 04/10/2013 | CN103038445A Mud pulse telemetry |
| 04/10/2013 | CN103038444A Transmission system for communication between downhole elements |
| 04/10/2013 | CN103038439A Method for in situ fluid assessment and optimization during wellbore displacement operations |
| 04/10/2013 | CN103032065A Simulation test device and test method for well completion of horizontal well |
| 04/10/2013 | CN103032064A Method and device for detecting gas cut position in drilling process |
| 04/10/2013 | CN103032063A Emergency disconnect sequence video sharing |
| 04/10/2013 | CN103032062A Digital lateral electrode |
| 04/10/2013 | CN103032061A Method for detecting sealing quality of oil pipe at well head |
| 04/10/2013 | CN103032057A Steam-driven three-dimensional physical simulation system for thick oil horizontal well |
| 04/10/2013 | CN103032050A Unstable formation treatment technique for rock salt well construction |
| 04/10/2013 | CN103032048A Remote communication with subsea running tools via blowout preventer |
| 04/10/2013 | CN102392634B Measuring device and measuring method for well-cementing annular weight loss of cement slurry |
| 04/10/2013 | CN102305021B Experimental method for simulating dynamic mechanics characteristic of underground drilling rig of air well drilling |
| 04/10/2013 | CN102191941B Support method for sharply inclined ultra-thick coal seam |
| 04/10/2013 | CN102094678B Method for identifying water-bursting risks in karst tunnels |
| 04/10/2013 | CN101881154B Mechanical oil recovery testing platform |
| 04/10/2013 | CN101749010B Testing device of mud pulse generator |
| 04/10/2013 | CN101636557B Measurement device in a horizontal well |
| 04/10/2013 | CN101603421B Gamma radiation logging along drilling method for petroleum drilling fluid |
| 04/10/2013 | CN101545374B Relay transmission measurement-while-drilling system |
| 04/09/2013 | US8413722 Method for circulating a fluid entry out of a subsurface wellbore without shutting in the wellbore |
| 04/09/2013 | CA2566221C System and methods using fiber optics in coiled tubing |
| 04/04/2013 | WO2013049574A2 Electrical submersible pump flow meter |
| 04/04/2013 | WO2013048719A1 Estimation of depletion or injection induced reservoir stresses using time-lapse sonic data in cased holes |
| 04/04/2013 | WO2013045941A1 Flow monitoring |
| 04/04/2013 | WO2013045442A1 Method and device for well communication |
| 04/04/2013 | WO2013044296A1 A heat flow exploration probe |
| 04/04/2013 | WO2013019553A3 Precise borehole geometry and bha lateral motion based on real time caliper measurements |
| 04/04/2013 | WO2013019417A3 Systems and methods for implementing different modes of communication on a communication line between surface and downhole equipment |
| 04/04/2013 | WO2013015965A3 Deployment mechanism for well logging devices |
| 04/04/2013 | WO2013015958A3 Method and system of displaying data associated with drilling a borehole |
| 04/04/2013 | WO2013009847A3 Smart drop-off tool and hang-off tool for a logging string |
| 04/04/2013 | WO2012161854A8 Safety system for autonomous downhole tool |
| 04/04/2013 | WO2012129277A3 Method to separate compressional and shear waves during seismic monitoring by utilizing linear and rotational multi-component sensors in arrays of shallow monitoring wells |
| 04/04/2013 | WO2012103313A3 Method for determining stratigraphic position of a wellbore during driling using color scale interpretation of strata and its application to wellbore construction operations |
| 04/04/2013 | US20130084643 Use of nanoparticles for labelling oil field injection waters |
| 04/04/2013 | US20130083627 Remote communication with subsea running tools via blowout preventer |
| 04/04/2013 | US20130082845 Estimation and compensation of pressure and flow induced distortion in mud-pulse telemetry |
| 04/04/2013 | US20130081876 Optical power for self-propelled mineral mole |
| 04/04/2013 | US20130081874 Electro-Hydraulic Drilling With Shock Wave Reflection |
| 04/04/2013 | US20130081807 Providing Equipment In Lateral Branches Of A Well |
| 04/04/2013 | US20130081806 Debris resistant internal tubular testing system |
| 04/04/2013 | US20130081804 Estimation of depletion or injection induced reservoir stresses using time-lapse sonic data in cased holes |
| 04/04/2013 | US20130081460 Electrical Submersible Pump Flow Meter |
| 04/04/2013 | US20130081459 Production logging in horizontal wells |
| 04/04/2013 | CA2849928A1 Method and device for supplying at least one electrical consumer of a drill pipe with an operating voltage |
| 04/04/2013 | CA2849863A1 Fluid determination in a well bore |
| 04/04/2013 | CA2849639A1 Estimation of depletion or injection induced reservoir stresses using time-lapse sonic data in cased holes |
| 04/04/2013 | CA2849302A1 Apparatus for evaluating rock properties while drilling using drilling rig-mounted acoustic sensors |
| 04/04/2013 | CA2849126A1 Methods for evaluating rock properties while drilling using drilling rig-mounted acoustic sensors |
| 04/04/2013 | CA2848192A1 Electrical submersible pump flow meter |
| 04/04/2013 | CA2840041A1 Method and device for well communication |