SPE - Society of Petroleum Engineers Drilling Engineering Principles Questions and Answers

Question 1

A drilling operation encounters a situation where the drill string cannot be moved up or down, but circulation of drilling fluid remains possible.
This scenario is a classic indicator of which type of stuck pipe mechanism?

Accepted Answer

Differential sticking

Answer

Key seating

Answer

Wellbore collapse

Answer

Cuttings pack-off

Question 2

What is the primary function of barite (barium sulfate) in drilling fluids?

Accepted Answer

To increase the density of the fluid to control formation pressures

Answer

To increase fluid viscosity for better cuttings transport

Answer

To reduce fluid loss into the formation

Answer

To act as a lubricant to reduce torque and drag

Question 3

In the context of well control, what does 'kick tolerance' define?

Accepted Answer

The maximum volume of formation fluid influx that can be safely shut-in and circulated out without fracturing the weakest formation.

Answer

The maximum rate at which the well can be circulated without fracturing the formation.

Answer

The maximum pressure the blowout preventer (BOP) stack can safely contain.

Answer

The ability of the drill string to withstand the dynamic forces of a well kick.

Question 4

Which of the following is a critical best practice for achieving effective zonal isolation during a primary cementing operation?

Accepted Answer

Ensuring proper casing centralization to achieve a uniform cement sheath.

Answer

Maximizing the pumping rate to fracture the formation for a better bond.

Answer

Using a low-viscosity spacer fluid to minimize friction pressures.

Answer

Minimizing the use of pre-flush fluids to save time and cost.

Question 5

A drilling engineer notes that while circulating, the bottom-hole pressure is significantly higher than the hydrostatic pressure of the mud column when static. This dynamic increase in pressure is known as:

Accepted Answer

Equivalent Circulating Density (ECD)

Answer

Surge Pressure

Answer

Hydrostatic Imbalance

Answer

Formation Integrity Pressure

Question 6

In directional drilling, which survey calculation method is generally considered the most accurate and is the industry standard for final wellbore position calculations?

Accepted Answer

Minimum Curvature Method

Answer

Tangential Method

Answer

Average Angle Method

Answer

Balanced Tangential Method

A drilling operation encounters a situation where the drill string cannot be moved up or down, but circulation of drilling fluid remains possible.This scenario is a classic indicator of which type of stuck pipe mechanism?

A drilling operation encounters a situation where the drill string cannot be moved up or down, but circulation of drilling fluid remains possible.
This scenario is a classic indicator of which type of stuck pipe mechanism?