You are drilling a $12-\frac{1}{4}"$ hole at $8,000ft$ using $5\mathrm{.}0"$ OD $4\mathrm{.}276$ ID drill pipe and $800$ It

of $8\mathrm{.}0\frac{23}{4}$ in$.$ drill collars. The well has $13-\frac{3}{8},68lb\frac{s}{\frac{?}{?}}ft$ casing $($ID ${12\mathrm{.}415}^{\text{'}\text{'}})$ set at

$6000$ ft $.$ Mud is pumped down the drill pipe at the rate of $630ga\frac{l}{m}in.$ Mud properties

are: density $=12\mathrm{.}0ppg,$ viscosity $=14cP,$ yield point $=20l\frac{b}{100}sq-ft.$ The bit has three

$0\mathrm{.}50"$ ID nozzles.

Calculate the pressure loss in the drill pipe.

Calculate the pressure loss in the drill collars.

Calculate the pressure loss across the bit.

Calculate the pressure loss across the drill collar and open hole annulus.

Calculate the pressure loss across the drill pipe and open hole annulus.

Calculate the pressure loss across the drill pipe and cased hole annulus.

Calculate the horse power of the mud pump required to pump the mud at $630$ gpm $.$

Calculate the equivalent circulation density