| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 05/15/2013 | CN202937251U Testing pulley |
| 05/15/2013 | CN202937250U Oil field oil-water well remote telemetry system |
| 05/15/2013 | CN202937249U Stopper |
| 05/15/2013 | CN202937248U Single-well metering device |
| 05/15/2013 | CN202937247U Event control and signal acquisition circuit of nuclear magnetic resonance logging instrument |
| 05/15/2013 | CN202937246U Multilateral well experimental model and edge water stimulation device and multilateral well experimental system thereof |
| 05/15/2013 | CN202937244U Head-up transparent weight indicator for well drilling |
| 05/15/2013 | CN202937240U Double-probe measuring and adjusting linkage system |
| 05/15/2013 | CN202936813U Anchor hole location and slope/corner measurer |
| 05/15/2013 | CN202936034U Non-magnetic steel well logging and testing cable roller |
| 05/15/2013 | CN103104254A Multifunctional oil reservoir simulation experiment device and experiment method thereof |
| 05/15/2013 | CN103104253A Down-hole tool pressure testing device and pressure testing method thereof |
| 05/15/2013 | CN103104252A Down-hole tool pressure testing device |
| 05/15/2013 | CN103104251A Method used for improving accuracy of azimuthal angle and tool face angle of small well inclined downward fiber-optic gyroscope inclinometer |
| 05/15/2013 | CN103104250A Drilling inclinometer |
| 05/15/2013 | CN103104249A Quality monitoring method for downhole tools |
| 05/15/2013 | CN103104248A Method for measuring mud density and mass flow rate |
| 05/15/2013 | CN103104247A Drill-bit gear-ring combined rock-breaking testing system |
| 05/15/2013 | CN103104246A Drill-bit performance parameter testing method |
| 05/15/2013 | CN103104245A Sensor used for measuring mud density and mass flow rate |
| 05/15/2013 | CN103104244A Signal collecting circuit for mud parameter tester |
| 05/15/2013 | CN103104243A Processing method for vibrating screen mud parameter signals |
| 05/15/2013 | CN103104242A Drill-bit gear-ring combined rock-breaking testing system and testing method thereof |
| 05/15/2013 | CN103104241A Signal collecting circuit and signal collecting method for mud parameter tester |
| 05/15/2013 | CN102094645B Small-bore microspherically-focused logging instrument |
| 05/15/2013 | CN101858210B Simulated test device for acoustic logging instrument |
| 05/15/2013 | CN101783714B Method and device for acquiring transmission data |
| 05/15/2013 | CN101666228B Hydraulic accumulating device of telescoping ram |
| 05/15/2013 | CN101498211B Method for water distribution by sound wave remote control and the matched intelligent water distributor |
| 05/15/2013 | CN101338664B Condensed gas flow quantity measuring systems |
| 05/15/2013 | CN101333926B Oil gas water flow measurement system possessing automatic control device |
| 05/14/2013 | US8442769 Method of determining and utilizing high fidelity wellbore trajectory |
| 05/14/2013 | US8441889 Self-stabilizing dynamic diaphragm for broad bandwidth acoustic energy source |
| 05/14/2013 | US8439131 Drill bit assembly and method of performing an operation in a wellbore |
| 05/14/2013 | US8439130 Method and apparatus for seismic data acquisition during drilling operations |
| 05/14/2013 | US8439114 Method and apparatus for orienting perforating devices |
| 05/14/2013 | US8439109 System and method for depth measurement and correction during subsea intervention operations |
| 05/14/2013 | US8439106 Logging system and methodology |
| 05/14/2013 | US8438918 Method for pressure testing a pressure foot assembly |
| 05/14/2013 | US8438917 Methods of long-term gravimetric monitoring of carbon dioxide storage in geological formations |
| 05/14/2013 | CA2709698C Purging of fiber optic conduits in subterranean wells |
| 05/14/2013 | CA2694225C Drill bit tracking apparatus and method |
| 05/14/2013 | CA2585061C Method and apparatus for well treatment |
| 05/10/2013 | WO2013067540A1 Production logging instrument |
| 05/10/2013 | WO2013067363A1 Modeling of interaction of hydraulic fractures in complex fracture networks |
| 05/10/2013 | WO2013067255A1 Well access tools |
| 05/10/2013 | WO2013066746A1 Method and system for predicting a drill string stuck pipe event |
| 05/10/2013 | WO2013064494A1 Downhole tool for determining flow velocity |
| 05/10/2013 | WO2013040402A3 Energy radiation generator with uni-polar voltage ladder |
| 05/10/2013 | WO2013040390A3 Energy radiation generator with bi-polar voltage ladder |
| 05/10/2013 | WO2013039636A3 Connection method of replaceable sensors for resistivity arrays |
| 05/10/2013 | WO2013039631A3 Method of phase synchronization of mwd or wireline apparatus separated in the string |
| 05/10/2013 | WO2013016326A3 Detection of downhole vibrations using surface data from drilling rigs |
| 05/10/2013 | WO2013009932A3 Reducing fluid capacitance and conductance effects on piezoelectric resonator measurements |
| 05/10/2013 | WO2012174032A3 Cutting elements comprising sensors, earth-boring tools having such sensors, and associated methods |
| 05/10/2013 | CA2854465A1 Well access tools |
| 05/10/2013 | CA2854404A1 Production logging instrument |
| 05/10/2013 | CA2854371A1 Modeling of interaction of hydraulic fractures in complex fracture networks |
| 05/10/2013 | CA2852765A1 Method and system for predicting a drill string stuck pipe event |
| 05/10/2013 | CA2852602A1 Downhole tool for determining flow velocity |
| 05/10/2013 | CA2849245A1 Multi-component induction logging systems and methods using real-time obm borehole correction |
| 05/09/2013 | US20130116962 Method and device for estimating cool down in a system |
| 05/09/2013 | US20130112479 Tubular catcher system and method |
| 05/09/2013 | US20130112408 Ported packer |
| 05/09/2013 | US20130112406 Methods for Characterizing Asphaltene Instability in Reservoir Fluids |
| 05/09/2013 | US20130112404 Preemptive setpoint pressure offset for flow diversion in drilling operations |
| 05/09/2013 | US20130112401 Downhole electrical energy conversion and generation |
| 05/09/2013 | US20130112400 Wellbore fluid treatment and method |
| 05/09/2013 | US20130111985 Method for efficient pressure and inflow testing of a fluid containment system through real time leak detection with quantification of pvt effects |
| 05/08/2013 | EP2590178A1 Equipment and methods for deploying line in a wellbore |
| 05/08/2013 | EP2588893A2 System, apparatus, and method for monitoring a subsea flow device |
| 05/08/2013 | EP2588890A2 Systems and methods for compressing data and controlling data compression in borehole communication |
| 05/08/2013 | EP2588716A1 Method for in situ fluid assessment and optimization during wellbore displacement operations |
| 05/08/2013 | EP2588715A1 "system and method for directional drilling" |
| 05/08/2013 | EP2588709A2 Blowout preventer monitoring system and method of using same |
| 05/08/2013 | CN202926320U A detection device for recording downhole vibration |
| 05/08/2013 | CN202926319U Annulus under-pressure diagnostic device |
| 05/08/2013 | CN202926318U Inclination measuring baffle |
| 05/08/2013 | CN202926317U Clinometer used in well |
| 05/08/2013 | CN202926316U Measurement instrument for azimuth angle and dip angle |
| 05/08/2013 | CN202926315U Sand-filled pipe |
| 05/08/2013 | CN202926314U Insulation nipple |
| 05/08/2013 | CN202926313U Real-time measurement and transmission device of drill rod |
| 05/08/2013 | CN202926312U Shield assembly used for logging device connector base |
| 05/08/2013 | CN202926311U Well logging exploring tube |
| 05/08/2013 | CN202926310U U-shaped tubular single well yield metering device |
| 05/08/2013 | CN202925368U Logging wire cable |
| 05/08/2013 | CN202925367U Steel rope for logging |
| 05/08/2013 | CN103097656A Well |
| 05/08/2013 | CN103097655A System and method for measuring borehole conditions, in particular, verification of a final borehole diameter |
| 05/08/2013 | CN103097653A Assembly and method for multi-zone fracture stimulation of a reservoir autonomous tubular unit |
| 05/08/2013 | CN103097645A A safety mechanism for a well, a well comprising the safety mechanism, and related methods |
| 05/08/2013 | CN103097643A Clamp |
| 05/08/2013 | CN103089253A Method using wavelet transformation to calculate formation pore pressure |
| 05/08/2013 | CN103089249A Signal wireless electromagnetism transmission system while drilling |
| 05/08/2013 | CN103089248A Full-scale bit test data acquisition method |
| 05/08/2013 | CN103089247A Gas pressure testing device and method of coal measure strata rich in water |
| 05/08/2013 | CN103089246A Dynamic liquid level measuring method of sucker-rod pumping well |
| 05/08/2013 | CN103089245A Intelligent testing adjusting downhole cable noncontact type depth metering device |
| 05/08/2013 | CN103089244A Laser azimuth instrument |