pa—pd/0.0098 1hw
Radiation weapon (abbreviation for radiation weapon)
—— Overflow fluid density,
Kg/m3
right hand
—— Pressure gradient of liquid column in drilling tool, kg/m3.
dad
-shut-in casing pressure, mpa
pitch diameter of thread
—— Vertical shut-in pressure, mpa
Hotwater (hot water)
—— Bottom hole overflow height, m (m)
Wherein the shut-in casing pressure pa and the vertical pressure pd are 6.9mpa, that is,
Pa-PD equals zero,
pa—pd/0.0098 1hw
The whole score is meaningless.
So, are the data of shut-in casing pressure pa and vertical pressure pd wrong?