Research on the drilling winch control system for clean sampling of Antarctic Subglacial Lakes

Antarctica, with a large number of ice sheets, is among the last unexplored places on Earth. The subglacial lakes beneath these sheets have been isolated from outside world for up to 35 million years, containing diverse group marine organisms and other materials. Its unique hydrological environment provides insights regarding microbial evolution past climates Earth, which become central interpreting process landscape assessments possible future climate change. Clean sampling lake water without introducing surface biological or type contamination has long goal international scientific community. overlying thickness can reach thousands meters in conventional deep drilling, drilling fluids are employed while boreholes exposed atmosphere. only method penetration thermal rate proportional vertical diameter rig, requires drill body be as thin possible. melted ice/water upper borehole will refreeze immediately once penetrating into layers. Cables, thereby, need configured inside rig since separate cables external not applicable such cases. comprises motor-driven winch, outer heating system, control system well totaling 600 kg weight. Gear reducers required during cable lowering/lifting operations maximum winch 140 mm high-precision automatic synchronization between required. An tension sensor along designed realize thee gear through servo control.