| Patents for E21B 47 - Survey of boreholes or wells (31,352) |
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| 07/12/2001 | WO2001049965A1 Integrated transmitter surveying while boring (swb) entrenching powering device for the continuation of a guided bore hole |
| 07/11/2001 | EP1114334A1 Method and apparatus for creating an image of an earth borehole or a well casing |
| 07/11/2001 | EP1005602B1 Drilling system with means for anchoring in the borehole |
| 07/10/2001 | CA2111356C Method and apparatus for detecting boundary stratum |
| 07/10/2001 | CA2096941C Downhole drilling data processing and interpreting device, and method for implementing same |
| 07/05/2001 | WO2001049001A1 Method and apparatus for transmission of well-bore data on multiple carrier frequencies |
| 07/05/2001 | WO2001048353A1 Autonomous omnidirectional driller |
| 07/05/2001 | DE19960036C1 Verfahren zum Vermessen eines Bohrloches Method for measuring a borehole |
| 07/04/2001 | CN2437855Y Hanging device for manometric apparatus under electric immersed pump |
| 07/03/2001 | US6256587 Method for correcting well log data for effects of changes in instrument velocity (cable yo-yo) |
| 07/03/2001 | US6253853 Fluid injection tubing assembly and method |
| 07/03/2001 | US6253849 Method of distinguishing the raising and lowering of tubing and sucker rods |
| 07/03/2001 | US6253848 Method of obtaining improved geophysical information about earth formations |
| 07/03/2001 | US6253842 Wireless coiled tubing joint locator |
| 06/28/2001 | WO2001046673A1 Improved method and apparatus for predicting the fluid characteristics in a well hole |
| 06/28/2001 | WO2001046555A1 System and method for telemetry in a wellbore |
| 06/28/2001 | WO2001046554A1 Long range electronic guidance system for locating a discrete in-ground boring device |
| 06/28/2001 | WO2001046549A1 Three dimensional steerable system |
| 06/28/2001 | WO2001046548A2 Technique for signal detection using adaptive filtering in mud pulse telemetry |
| 06/28/2001 | DE19780447C1 Using radon as trace element |
| 06/28/2001 | CA2395082A1 System and method for telemetry in a wellbore |
| 06/27/2001 | EP1110065A1 Seismic sensing and acoustic logging systems using optical fiber, transducers and sensors |
| 06/27/2001 | EP1109990A1 Method of using a heater with a fiber optic string in a wellbore |
| 06/26/2001 | US6252518 Communications systems in a well |
| 06/26/2001 | US6250848 Process for guidance, containment, treatment, and imaging in a subsurface environment utilizing ferro-fluids |
| 06/26/2001 | US6250402 Establishing positions of locating field detectors and path mappings in underground boring tool applications |
| 06/21/2001 | US20010004017 Well-bottom gas separator |
| 06/20/2001 | EP1108854A2 Diameter control method for columns produced by an injection method |
| 06/20/2001 | EP1108853A2 Method of measuring a borehole |
| 06/20/2001 | CN2435514Y Water well stratification pressure-measuring unit |
| 06/20/2001 | CN2435513Y Device for measuring downhole pressure of production oil well |
| 06/20/2001 | CN1299970A Oil well water capacity measuring instrument |
| 06/16/2001 | CA2328196A1 Apparatus for mounting an electronic device for use in directional drilling |
| 06/14/2001 | WO2001042623A1 Telemetry system for borehole logging tools |
| 06/14/2001 | WO2001042622A1 Method and device for transferring data |
| 06/14/2001 | WO2001042621A1 Method of assessing positional uncertainty in drilling a well |
| 06/14/2001 | WO2001042614A2 Method for compensating for remote clock offset |
| 06/13/2001 | EP1105621A2 System and method for controlling fluid flow in one or more oil and/or gas wells |
| 06/13/2001 | EP1105620A1 Hydraulic well control system |
| 06/12/2001 | US6244340 Self-locating reentry system for downhole well completions |
| 06/12/2001 | CA2201567C Method of longitudinally splitting a pipe coupling within a wellbore |
| 06/07/2001 | WO2001040771A2 Apparatus and method for analyzing fluids |
| 06/07/2001 | WO2001040627A1 Leak detection method |
| 06/07/2001 | WO2001040626A1 Flow identification system |
| 06/07/2001 | WO2001040625A1 Exploration apparatus with video camera |
| 06/07/2001 | WO2001040615A1 Downhole device |
| 06/07/2001 | DE19955345A1 Bohrkopf mit Energieerzeugungsvorrichtung Drilling head with energy generating device |
| 06/07/2001 | CA2392924A1 Apparatus and method for analyzing fluids |
| 06/07/2001 | CA2392064A1 Leak detection method |
| 06/06/2001 | CN1298093A Sound sensor assembly |
| 06/05/2001 | US6242268 Using water-soluble, fluorescent, rare earth metal chelates as tags on specific binding partners and detecting fluorescent emission from sample after fluorescence of ambient susbtances have decayed |
| 06/05/2001 | US6241032 One-way drill string clutch |
| 06/05/2001 | US6241029 Earth formation surveying device |
| 06/05/2001 | US6241028 Method and system for measuring data in a fluid transportation conduit |
| 06/05/2001 | US6241020 Method of recording a cross-load on a mobile repair unit for a well |
| 06/05/2001 | US6240787 Method of determining fluid inflow rates |
| 06/03/2001 | CA2327219A1 Fluid cut control device |
| 05/31/2001 | WO2001039412A1 Adaptive acoustic channel equalizer and tuning method |
| 05/31/2001 | WO2001039284A1 Piezoelectric downhole strain sensor and power generator |
| 05/31/2001 | US20010001991 Oleaginous fluid, a polar organic solvent, and an electrolytic salt present in a concentration so as to permit the electrical logging of the subterranean well, and a carbon dioxide buffer |
| 05/30/2001 | CN1297101A Non-cable near-distance dynamic parameters logging method for oil well |
| 05/29/2001 | US6237701 Impulsive suction pulse generator for borehole |
| 05/29/2001 | US6237410 Method for controlling the speed of a pump based on measurement of the fluid depth in a well |
| 05/29/2001 | US6237404 Apparatus and method for determining a drilling mode to optimize formation evaluation measurements |
| 05/29/2001 | CA2147311C Fluid holdup tool for deviated wells |
| 05/25/2001 | WO2001036787A1 Downhole valve |
| 05/25/2001 | WO2001036781A2 Drill head with a power generation device |
| 05/25/2001 | CA2389621A1 Downhole valve |
| 05/23/2001 | CN2431400Y Wireless pulse generator during drilling |
| 05/23/2001 | CN2431399Y Wired integrated inclinometer during drilling |
| 05/22/2001 | US6236620 Integrated well drilling and evaluation |
| 05/22/2001 | US6234257 Deployable sensor apparatus and method |
| 05/22/2001 | US6234250 Real time wellbore pit volume monitoring system and method |
| 05/22/2001 | US6233746 Multiplexed fiber optic transducer for use in a well and method |
| 05/17/2001 | WO2001034935A1 Control method for use with a steerable drilling system |
| 05/17/2001 | CA2359073A1 Control method for use with a steerable drilling system |
| 05/16/2001 | EP1099101A1 Non-intrusive fiber optic pressure sensor for measuring unsteady pressures within a pipe |
| 05/15/2001 | US6233524 Closed loop drilling system |
| 05/15/2001 | US6232780 Underground locating using a locating signal transmitter configured with a single antenna |
| 05/15/2001 | US6232598 Process and devices for characterizing ground water measurement points by distinguishing ground water from subterranean water accumulation |
| 05/15/2001 | US6230822 Method and apparatus for monitoring and recording of the operating condition of a downhole drill bit during drilling operations |
| 05/15/2001 | US6230800 Methods and apparatus for long term monitoring of a hydrocarbon reservoir |
| 05/10/2001 | WO2001033662A1 Electromagnetic antenna extension assembly and method |
| 05/10/2001 | WO2001033046A1 Method and apparatus for accurate temperature and pressure measurement |
| 05/10/2001 | WO2001033045A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/10/2001 | WO2001033044A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/10/2001 | DE19950040A1 Vorrichtung zum Niederbringen verlaufkontrollierter Bohrungen Apparatus for sinking bores extending controlled |
| 05/10/2001 | CA2376544A1 Drilling formation tester, apparatus and methods of testing and monitoring status of tester |
| 05/10/2001 | CA2325115A1 Digital signal receiver for mwd telemetry systems |
| 05/09/2001 | EP1097290A1 Downhole well corrosion monitoring apparatus and method |
| 05/08/2001 | US6229453 Method to transmit downhole video up standard wireline cable using digital data compression techniques |
| 05/08/2001 | US6227310 Method and apparatus for providing a magnetic direction reference |
| 05/08/2001 | US6227302 Apparatus and method for controlling fluid flow in a wellbore |
| 05/08/2001 | US6227045 Groundwater flow measuring system |
| 05/08/2001 | US6227044 Methods and apparatus for detecting torsional vibration in a bottomhole assembly |
| 05/03/2001 | WO2001031329A1 Deposition monitoring system |
| 05/03/2001 | WO2001031328A1 Downhole deposition monitoring system |
| 05/03/2001 | WO2001031298A2 Multiphase flow measurement system |
| 05/02/2001 | CN2428570Y Pressure read-out device of pressure-measuring meter |
| 05/01/2001 | US6223826 Auto-extending/retracting electrically isolated conductors in a segmented drill string |