17K views · 123 reactions | Gero Miesenböck explains the basics principles of optogenetics, a biological technique to control the activity of neurons or other cell types with light. | Interesting Engineering | Facebook

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Wireline Tractor In wireline logging operations, a tractor is a specialized conveyance tool used to push or pull logging tools in deviated or horizontal wells, where gravity alone cannot move the toolstring through the wellbore. Traditional wireline relies on gravity to lower tools into the well, but in highly deviated, horizontal, or extended-reach wells, this becomes ineffective. This is where wireline tractors are essential. A wireline tractor is a powered device that grips the inside of the