Downhole torque-generating and generator combination apparatus

A combination of a torque-generating apparatus with an alternator/generator. The torque-generating apparatus comprises a first assembly ( 10, 25 ) including a generally cylindrical member of magnetically soft material and having a longitudinal axis, and a second assembly ( 2 ) arranged coaxially wit...

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Bibliographic Details
Main Author SPRING GREGSON WILLIAM MARTIN
Format Patent
LanguageEnglish
Published 28.11.2006
Subjects
BLASTING
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
DYNAMO-ELECTRIC MACHINES
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
ELECTRICITY
FIXED CONSTRUCTIONS
GENERATION
HEATING
LIGHTING
MECHANICAL ENGINEERING
MINING
NON-POSITIVE DISPLACEMENT PUMPS
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
WEAPONS
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Summary:A combination of a torque-generating apparatus with an alternator/generator. The torque-generating apparatus comprises a first assembly ( 10, 25 ) including a generally cylindrical member of magnetically soft material and having a longitudinal axis, and a second assembly ( 2 ) arranged coaxially within the first assembly and including an electromagnetic winding ( 4 ). The first assembly ( 10, 25 ) and the second assembly ( 2 ) are rotatable relative to each other about the axis. Relative rotation between the first ( 10, 25 ) and second ( 2 ) assemblies induces a magnetic field which generates rotational torque between the first and second assemblies. Rectification means ( 31 ) is provided to convert alternating current electrical output from the alternator/generator ( 22 ) to provide D.C. current to the electromagnetic windings ( 4 ) of the torque generating apparatus to generate an electromagnetic braking effect.
Bibliography:Application Number: US20030476435