شرح طريقه حساب طفله القتل- Kill Mud Weight Calculations
Kill slush is the drilling fluid with a specific weight that will restore the primary well control and will secure the well on its own without the need of closing the BOP mound or any secondary well-conditioned control.
Balance of Pressures
Once the well is shut- in furnishing nothing has broken down, the pressures in the well will be in balance. What's lacking in hydrostatic head of fluid in the well is now being made up by face applied pressure on the annulus and on the drill pipe.furnishing the drilling bit is on bottom and the drill string is full with a known slush viscosity this allows us to determine what the conformation pressure is and hence what kill slush weight is needed to achieve balance.
On the drill pipe side of theU-tube.
On the covering side of theU-tube
The admixture of slush and conformation fluid in the annulus makes it insolvable to determine conformation pressure using the containing information. The drill pipe, still, is full of clean slush of given weight and can be used as a mark of what's passing downhole.
Kill Mud Weight computations
We bear the slush to produce a hydrostatic pressure equal to the conformation pressure over a length equal to the true perpendicular depth of the hole. This can be expressed as a grade, and converted to any asked slush weight unit; in this case ppg.The kill slush weight needed could also be described as the original slush weight increased by an quantum which will give a hydrostatic pressure equal to the quantum of the drill pipe shut- in pressure over the perpendicular length of the hole.
Kill Mud Weight computation Equation
Once the conformation pressure is known, the slush weight needed to balance, or kill, it can be calculated, since-
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