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... & gas well in the course of drilling, as it is, the device is adopted to execute new drilling well’s technique of balance pressure, which can prevent the pollution of oil-layer, improve the speed of drillin...
... Control System, BOP Ground Control Device, Oilfield Equipment To control BOP reliably and safely as well as prevent uncontrollable blowout, oil & gas industry standard API 16D should be followed. Factors to...
... to : 1 prevent poorly consolicated shallow formations from sloughing into the hole 2 protect fresh water sands from contamination by drilling mud 3 provide protection against hydrocarbons found at shallow d...