顶部驱动
top drive
top drive drilling system
顶部驱动液压动力头
top-drive hydraulic power head
安全阀主提动头部分
relief valve main poppet section
局部水驱油藏
partial water drive reservoir
局部水头损失
local head loss
the loss of local water head
local head losses
局部水头损失系数
local head loss coefficient