MECHANICAL MAGNETIC MEASURING

Brand Owner Address Description
EASTMAN CHRISTENSEN EASTMAN CHRISTENSEN COMPANY 1937 SOUTH 300 WEST SALT LAKE CITY UT 84115 MECHANICAL AND MAGNETIC MEASURING AND ORIENTATION INSTRUMENTS ALL FOR USE IN WELL DRILLING, NAMELY INSTRUMENTS FOR INDICATING DRIFT, HAND OPERATED DRIFT INDICATORS AND SURVEYING INSTRUMENTS; ELECTRONIC MEASURING AND ORIENTATION INSTRUMENTS FOR USE IN WELL DRILLING, COMPRISING INSTRUMENTS WHICH SENSE, MEASURE, TRANSMIT, RECORD AND PROVIDE READOUT OF DRIFT, AZIMUTH, TOOL FACE ORIENTATION, TEMPERATURE, AND GAMMA RAY AND ELECTRICAL RESISTIVITY; AUTOMATIC AND MANUAL VALVE ASSEMBLIES ALL SOLD AS A UNIT AND BATTERY PACKS FOR THE ABOVE EQUIPMENT; TOOL TESTING UNITS; AND COMPUTERS AND COMPUTER PROGRAMS USED IN THE FIELD OF WELL DRILLING;MACHINES FOR DRILLING, BORING, REAMING, CUTTING, SAWING, AND CHISELING, AND BITS AND BLADES USED THEREFOR, PARTS THEREOF, AND FITTINGS THEREFOR, NAMELY, WASHOVER SHOES, CORE EJECTORS, CORE BARRELS, INNER TUBES, JUNK BASKETS, MUD SCREENS, SAFETY JOINTS, AND SHOCK ABSORBERS; MOTORS, STABILIZERS, DRILL COLLARS, JARS, ALL FOR USE IN WELL AND MINING DRILLING, EXPLOITATION AND MAINTENANCE; MACHINES USED FOR MAKE-UP AND BREAK-OUT OF CONNECTIONS, HYDRAULIC VICES, METAL THREAD WORKING UNITS, AND TOOL MOUNTING CYLINDERS;ENGINEERING AND GEOLOGICAL SERVICES NAMELY SERVICES OF PLANNING WELL DRILLING, WELL DESIGN, HYDRAULIC ANALYSIS, WELL SURVEYING, AND SERVICES OF ON SITE SUPERVISION OF WELLS;
 

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Technical Examples
  1. The invention relates to a sensor for detecting the direction of a magnetic field in a plane whose direction can be defined by the indication of a polar angle ?. Said sensor comprises a number of n magnetic field sensors (3.0 to 3.7). A measurement axis (8.1 to 8.4) is assigned to each magnetic field sensor in such a manner that the absolute value of the output signal of the magnetic field sensor is largest when the magnetic field runs parallel to the measuring axis. All measuring axes intersect at a common point (5). The number k of measuring axes is equal to at least three. An operating mode is provided during which two magnetic field sensors are selected for calculating the angle ?. These two magnetic field sensors belong to different measuring axes, and the values of the output signals thereof are less than those of the output signals of the magnetic field sensors belonging to the other measuring axes.