## Schlumberger Interview For Drilling Engineer

**These 3 wells have been drilled with a mud of specific gravity of 1.25 gr/cm3 in which well A,B or C will the highest hydrostatic bottom hole pressure be recorded**

**a**. Well A

**b**. Well B

**c**. Well C

**d**. All three will have equal bottom hole pressure

Look to this picture and answer which well A,B,C will the highest hydrostatic bottom hole pressure be recorded

**Answer**

First

Hydrostatic pressure = 0.52 X Mud Density X TVD

052 :Constant Factore

**The True Vertical Depth TVD**: this the depth measure from the bottom of the hole straight up to the surface of hole = the hight of the fluid column

**The Measure Depth MD**: this is measure lenght of tubing or true depth which required to reach the bottom of the well

U can convert g/cm3 to ppg 👌 1 ppg = 0,12 g/cm3 Any way they have the same mud weight and only depend on TVD as i said

**so**

True answer

All three will have equal bottom hole pressure

because three wells have the same True Vertical Depth TVD and Hydrostatic Pressure HD depend on True vertical depth not on Measuerd depth and this angle don't affect on the pressure Value

and bottom hole pressure not depend the shape of wells

Hd=0.52*Mud Density*TVd

Another answer

D because weight is based off of gravity and it doesn’t matter how many crooks and turns they have they’re actually the same depth

Hydrostatic pressure goes off total vertical depth so they look to be the same answers D

Thanks

Referance