DRIVING DEVICE FOR DRIVING DRILL PIPES AND METHOD FOR OPERATING SUCH A DRIVING DEVICE

The invention relates to a so-called topdrive (16) in the form of a device to drive drill pipes and to a method for operating this drive, in which means are provided to heat the gearbox oil (46) used by the topdrive (16), which means can also be supplied by an emergency power unit and comprise a hyd...

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Bibliographic Details
Main Author MOSS JOHANNES
Format Patent
LanguageEnglish
Published 14.01.2016
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:The invention relates to a so-called topdrive (16) in the form of a device to drive drill pipes and to a method for operating this drive, in which means are provided to heat the gearbox oil (46) used by the topdrive (16), which means can also be supplied by an emergency power unit and comprise a hydraulic unit (28) and a pressure limiting valve (40) of the topdrive (16), wherein hydraulic fluid (36) is circulated through the pressure limiting valve (40) to heat the gearbox oil (46) by the hydraulic unit (28), and the heat energy thus generated is transferred through a heat exchanger (48) through which the hydraulic fluid (36) flows to the gearbox oil (46).
Bibliography:Application Number: US201414772367