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Marsh funnel viscosity
| Глоссарий по проходческим щитам (тоннелингу) |
A measure of the flow rate of a fluid through a calibrated funnel. a marsh funnel is typically used to measure drilling fluid and slurry viscosity, in seconds per quart (sec/qt) of fluid. the marsh funnel viscosity of water is 26 sec/qt.
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Pipe brake, английский
A mechanical device designed to prevent the mtbm and pipe string from moving back into the shaft.
Trenchless technology, английский
- A family of construction techniques for installing or rehabilitating underground infrastructure with minimal disruption to surface traffic, businesses, and residents. also includes technologies for inspection, leak location, and leak detection with minimal disruption and minimal excavation from the ground surface.
- Underground construction methods of utility installation, rehabilitation, inspection, location and leak detection, with minimum excavation from the surface.
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