| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 07/17/2012 | CA2521543C Fluid flow measurement using optical fibres |
| 07/17/2012 | CA2378506C Low-loss inductive couplers for use in wired pipe strings |
| 07/12/2012 | WO2012094626A2 Test packer and method for use |
| 07/12/2012 | WO2012094305A2 Method and device to measure perforation tunnel dimensions |
| 07/12/2012 | WO2012094242A2 Method for a pressure release encoding system for communicating downhole information through a wellbore to a surface location |
| 07/12/2012 | WO2012094086A2 Method and apparatus for monitoring vibration using fiber optic sensors |
| 07/12/2012 | WO2012094007A2 Downhole formation fluid contamination assessment |
| 07/12/2012 | WO2012093998A1 Method and system of calculating a fault throw |
| 07/12/2012 | WO2012093236A1 Probe for analysing an assembly of rods or tubes |
| 07/12/2012 | WO2012065126A3 Remote operation of setting tools for liner hangers |
| 07/12/2012 | US20120179428 System and method for completion optimization |
| 07/12/2012 | US20120179377 Transducer assembly |
| 07/12/2012 | US20120176621 Gas migration test method |
| 07/12/2012 | US20120175167 Boring tool tracking fundamentally based on drill string length, pitch and roll |
| 07/12/2012 | US20120175135 Packer deployed formation sensor |
| 07/12/2012 | US20120175109 Non-intrusive flow indicator |
| 07/12/2012 | US20120175108 Test packer and method for use |
| 07/12/2012 | US20120174663 Pressure sensor with internal bellows |
| 07/12/2012 | CA2824000A1 Probe for analysing an assembly of rods or tubes |
| 07/12/2012 | CA2823836A1 Method for a pressure release encoding system for communicating downhole information through a wellbore to a surface location |
| 07/12/2012 | CA2823687A1 Downhole formation fluid contamination assessment |
| 07/12/2012 | CA2823307A1 Method and apparatus for monitoring vibration using fiber optic sensors |
| 07/12/2012 | CA2823211A1 Test packer and method for use |
| 07/12/2012 | CA2821337A1 Method and system of calculating a fault throw |
| 07/11/2012 | EP2474703A1 Boring ram |
| 07/11/2012 | EP2473708A2 System and method for communicating data between wellbore instruments and surface devices |
| 07/11/2012 | EP2473707A1 Apparatus and method for measuring stress in a subterranean formation |
| 07/11/2012 | EP2473700A1 Wellbore servicing compositions and methods of making and using same |
| 07/11/2012 | CN202333397U 一种用于随钻测量的电联通装置 Electrical communication apparatus for measurement while drilling |
| 07/11/2012 | CN202325497U 储层参数变化对声波测井影响的模拟实验装置 Reservoir simulation device parameters on the impact of sonic logging |
| 07/11/2012 | CN202325493U Excitation tension testing device of spring piece type pulse generator |
| 07/11/2012 | CN202325492U 柔性加重杆 Flexible heavier rod |
| 07/11/2012 | CN202325491U 低渗油藏油井间歇生产模拟实验装置 Intermittent production wells in low permeability reservoir simulation equipment |
| 07/11/2012 | CN202325490U 一种间歇油井出液指示及止回装置 An oil well fluid instructions and check out the device intermittently |
| 07/11/2012 | CN202325489U 胶塞指示器 Stopper indicator |
| 07/11/2012 | CN202325488U 一种井径测量装置 A well-diameter measuring device |
| 07/11/2012 | CN202325487U 注浆法测定煤层瓦斯压力过程中的一种泄压管 Determination of coal seam gas pressure grouting process of a pressure relief pipe |
| 07/11/2012 | CN202325486U 小直径高温隔热测压单元 Small-diameter high-temperature insulation load cell |
| 07/11/2012 | CN202325485U 远程带压液面监测装置 Remote monitoring device with pressure level |
| 07/11/2012 | CN202325484U 钻井远程液面监测系统 Drilling remote level monitoring system |
| 07/11/2012 | CN202325483U 一种钻孔深度计量装置 A drilling depth measuring device |
| 07/11/2012 | CN202325482U 钻孔深度计量装置 Drilling depth measuring device |
| 07/11/2012 | CN202325481U 一种用于连续测斜仪的磁通门信号激励与采集电路 An inclinometer continuous flux gate signal excitation and acquisition circuit |
| 07/11/2012 | CN202325480U 电子单点测斜座 Electronic single point inclinometer seat |
| 07/11/2012 | CN202325479U Ground receiver of mechanical type LWD (Logging While Drilling) inclinometer for vertical well |
| 07/11/2012 | CN202325478U 一种钻井测斜仪器的测试装置 An inclinometer instrumentation test equipment Drilling |
| 07/11/2012 | CN202325477U Centering device of horizontal well boron neutron lifetime logging instrument |
| 07/11/2012 | CN202325476U 新型随钻电阻率壳体 The new casing drilling resistivity |
| 07/11/2012 | CN202325475U 双向定位悬挂器 Bi-directional positioning hanger |
| 07/11/2012 | CN202325474U 油井用柔性连接器 Wells with flexible connector |
| 07/11/2012 | CN202325473U 钻孔电视探头的防雾保护装置 Anti-fog protection drilling TV probe |
| 07/11/2012 | CN202325472U 岩层结构探测的窥视仪探头可转动定向器 Peep rock structure detection instrument probe rotatable directional control |
| 07/11/2012 | CN202325471U Monitoring device for coal bed methane bored well |
| 07/11/2012 | CN202325470U 一种天然气气井超声波检测系统 One kind of natural gas wells ultrasonic inspection system |
| 07/11/2012 | CN202325469U 孔底压水试验封孔器 Bottom hole pressure water test sealing device |
| 07/11/2012 | CN202325468U 密封系统进水自动检测报警装置 Water sealing system automatically detects the alarm device |
| 07/11/2012 | CN202325467U 测井电缆沥油器 Wireline Lek oil |
| 07/11/2012 | CN202325364U 井口测试装置 Wellhead test device |
| 07/11/2012 | CN202325292U 滚珠形弹性扶正器 Ball-shaped elastic centralizer |
| 07/11/2012 | CN202325276U 一种带芯片的智能钻杆 An intelligent drill with chip |
| 07/11/2012 | CN202325274U 可测孔深的大通孔有线钻杆 Chase hole depth can be measured wired drill hole |
| 07/11/2012 | CN202325273U 注水井可测试尾管 Injection wells to test the tailpipe |
| 07/11/2012 | CN202325242U 模块式多用途无磁导向钻头 Modular multi-purpose non-magnetic drill guide |
| 07/11/2012 | CN102562157A Self-networking joint for underground environmental condition wireless monitoring system |
| 07/11/2012 | CN102562138A Active decompression and outburst removal method for coal petrography dynamic disasters of expansion region of high gas-containing coal seam |
| 07/11/2012 | CN102562047A System and method for correcting borehole environment under centered array sensing instruments |
| 07/11/2012 | CN102562045A Detection device of mud positive pulse generator |
| 07/11/2012 | CN102562044A Devices and methods for transmitting EDS back-up signals to subsea pods |
| 07/11/2012 | CN102562043A Device for underground detecting sand production of oil well |
| 07/11/2012 | CN102562042A Signal transmission method for downhole measurement and control system |
| 07/11/2012 | CN102562041A Sand detector calibration |
| 07/11/2012 | CN102562040A Dynamic evaluation instrument for high-temperature and high-pressure drilling fluid loss |
| 07/11/2012 | CN102562039A Method and device for determining relative positions of coal bed gas horizontal well drill and straight well cave |
| 07/11/2012 | CN102562038A Direct reading testing system for pressure and temperature of underground stratum |
| 07/11/2012 | CN102562037A Quantitative judging method for damage range of coal mine tunnel |
| 07/11/2012 | CN102562036A Pressure and temperature monitor system of coal gas bed well based on optical fiber sensing |
| 07/11/2012 | CN102562035A Underground engineering parameter measurement-while-drilling device |
| 07/11/2012 | CN102562034A System for monitoring liquid level of coal-bed gas well based on optical fiber sensing |
| 07/11/2012 | CN102562033A Method for testing gas drainage drill hole depth through microseismic positioning |
| 07/11/2012 | CN102562032A Fire-flooding downhole high-temperature and high-pressure tester |
| 07/11/2012 | CN102562031A Continuous gyroscopic survey system for directional well |
| 07/11/2012 | CN102562030A Shell for sensing logging device and design plan for shell |
| 07/11/2012 | CN102562029A Method for protecting ultrasonic transducer from rotary installation and ultrasonic transducer fastening structure |
| 07/11/2012 | CN102562028A Automatic continuous oil measuring device of U-shaped tube integrator |
| 07/11/2012 | CN102562027A Plate type centering device with controllable outer diameter and manufacturing method of plate type centering device |
| 07/11/2012 | CN102562026A Gas production and water production section testing method of coal bed gas well and instrument |
| 07/11/2012 | CN102562016A Heavy oil thermal recovery process method |
| 07/11/2012 | CN102562013A Automatic modulation and monitoring zonal injection method for water injection well and system thereof |
| 07/11/2012 | CN102562008A Oil-gas exploration and development integrated mode for Bohai Sea |
| 07/11/2012 | CN102562000A Power-saving control method for intelligent oil pumping machine |
| 07/11/2012 | CN102561996A Intelligent well killing system |
| 07/11/2012 | CN102561969A Light and convenient resistance meeting preventive pressured cable lowering conveyor |
| 07/11/2012 | CN102561966A Multifunction downhole release tool mechanism with lost motion |
| 07/11/2012 | CN102561945A Drilling rig with intelligent flexible pipe |
| 07/11/2012 | CN102561941A Rotary drilling rig and pore-forming state detection device thereof |
| 07/11/2012 | CN102558768A Housing of array induction-type petroleum well logging device and preparation method thereof |
| 07/11/2012 | CN102121374B Borehole time domain pulse electromagnetic method for detecting electrical resistivity of stratum out of metal bushing |
| 07/11/2012 | CN101581214B Transient electromagnetic logging device in through-casing well |
| 07/11/2012 | CN101424182B Dynamic force multi-parameter measuring systems for rotary simulation of bottom drill string |
| 07/11/2012 | CN101338657B Hydraulically controlled underbalance downhole casing valve |