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  • Particle Size Analysis for Drilling in Petroleum Industry (.pdf)
    In order to drill a successful oil well, most drilling operators will use a good drilling fluid or mud (figure 1). Mud cools and lubricates the drilling tool, helps to attack the rock by injection under pressure, and cleans out the hole, carrying away the pieces of crushed rock. These mud systems
  • Preparation of Drilling Fluids
    Drilling fluids (or drilling muds) have several functions, including carrying bore cuttings to the surface, cooling and lubricating the drill "string" and controlling subsurface pressures. A simple water based mud for horizontal drilling and some vertical operations consists of clay (bentonite
  • Accumulators handle the extremes
    temperatures are outside the capabilities of bladder accumulators. When fluid discharges, the float lowers, closing the valve and preventing nitrogen gas from escaping. A typical 11-gallon unit is about 9 in. in diameter and 60 in. high. When drilling for oil, small amounts of high-pressure natural gas

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