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The process can be undertaken with pipes made of most common pipe materials, and on pipes with diameters ranging from 8 mm to 600 mm and lengths of several kilometers. The ice pigging process takes less time than traditional pigging methods for underground pipes and can be operated by fewer people.
In order to reverse the well kill, the kill fluid must be displaced from the well bore. This involves injecting a gas at high pressure, usually nitrogen since it is inert and relatively cheap. A gas can be put under sufficient pressure to allow it to push heavy kill fluid, but will then expand and become light once pressure is removed.
If a faucet or pipe ends up freezing inside the house, it can be thawed by using an electric hair dryer, wrapping an electric heat pad around the pipe or by soaking towels in hot water and ...
Pipes exposed to "severe cold" including outdoor hose bibs, swimming pool supply lines, and water sprinkler lines. (If you have swimming pool or sprinkler supply lines, they needed drained too.)
In temperate climates ventilation air may need to be heated during winter months. This will make the working environment more hospitable for miners, and prevent freezing of workings, in particular water pipes. In Arctic mines, where the mining horizon is above the permafrost, heating may not
This can be done by wrapping a heating pad around the pipe, or by applying consistent heat with a hair dryer or a portable space heater. You can also opt to soak towels in hot water and wrap them ...
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