Interview Questions.

Q1. Explain What Is Dogleg?

Dogleg time period is used to refer for an abrupt exchange in path within the wellbore, resulting in the formation of the keyseat.

Q2. Explain What Is Die Insert?

Die insert is a tough steel, a serrated piece which is removable and suits into the jaws of the tongs and firmly holds the frame of the drill pipe, drill collars at the same time as the tongs are making up or breaking out of the pipes.

Q3. What Is Kelly Bushing?

Kelly bushing is a tool suited to the rotatory table through which the Kelly passes and the mean by using which the torque of the rotatory desk is trmitted to the Kelly and to the drill stem.

Q4. Explain What Is Perforation In Oil Well Drilling?

A perforation is a hole made inside the casing or liner of an oil properly to connect it to the reservoir.

Q5. Explain What Is A Blowout Preventer?

Blowout preventer is set up at the pinnacle of the well and is used to govern the lower back stress produced by means of oil throughout the drilling method.

Q6. Explain What Is Annular Blowout Preventer?

Annular blowout preventer is mostly a huge valve, installed above the ram preventers, it forms a shielding seal inside the annular space between the pipes and well bore. It seals the annulus between the Kelly, drill collar and drill pipe.

Q7. What Is The Drill-stem Testing?

Lowering a device into the drill hollow to degree the pressures, it will monitor whether reservoir rock has been reached.

Q8. Explain The Term Induction Logs?

Induction logs are utilized in wells that do not use water or mud, but oil-primarily based drilling fluids or air. They are non-conductive and consequently can not use electric logs alternatively they use magnetism and strength to degree resistivity.

Q9. Mention What Is The Main Advantage Of Using The Pressure Drawdown Tests?

The draw down check will assist you to estimate the reservoir quantity.

Q10. Explain What Is Well Logging?

A properly log is used for graphical illustration of any drilling condition or subsurface features that encounter while drilling, that is used for the assessment of the well.

Q11. Explain The Term Desander And Desilter?

Desander is a centrifugal tool used for putting off sand from drilling the fluid to preclude the abrasion of the pumps. While Desilter is a centrifugal tool used to get rid of the slit or very first-rate particles.

Q12. Explain What Is Hydraulic Fracturing?

Hydraulic fracturing is a technique in which heaps of gallons of water, chemicals and sand at excessive stress is pumped down across the drilled well. This pressurized combination makes rock layer to crack and make small space or fissure, via which natural gasoline emits out.

Q13. Which Mineral Is Frequently Used To Increase The Weight Or Density Of Drilling Mud?

Barium Sulfate or BaSO4 mineral is regularly used to increase the density of drilling mud.

Q14. Explain What Is Underbalanced Drilling?

The underbalanced drilling is an alternative manner of drilling oil and gasoline wells, wherein the pressure within the wellbore is kept lower than the fluid strain. The advantage of underbalanced drilling is that it reduces formation damage in reservoirs.

Q15. Mention What Are The Different Types Of Well Logging?

Resistivity logs

Spontaneous ability logs

Gamma ray logs

Gamma ray absorption logs

Neutron logs

Sonic porosity logs

Q16. What Is Proppant And What Is The Use Of It?

A proppant is a stable fabric, that is handled with sand or ceramic substances. It is used to maintain the brought about hydraulic fracture open.

Q17. List Out The Methods Used For Well Test Analysis?

Various techniques for properly test analysis are:

Pressure drawdown tests

Pressure build up checks

Type curve analysis

Pulse assessments and Interference

Drill stem and wireline formation

Gas well exams

Q18. Explain How Spontaneous Logs Are Useful?

Spontaneous logs determine the permeability of the rocks within the nicely by means of denoting the electric currents produced between the drilling fluids and formation water held inside the pore spaces.

Q19. Explain What Is Wellbore Storage?

When the oil well is close-in, there is maintain waft of fluid into the wellbore. This float of fluid is referred as wellbore storage.

Q20. Explain What Is Pseudo Pressure?

Pseudo pressure is a mathematical strain characteristic which debts for the variable compressibility and viscosity of fuel with recognize to stress.

Q21. What Is The Importance Of Drilling Muds?

The drilling muds are used for:

Lubrication reason and for cooling of the drill bit and pipe

It removes the cuttings that come from the lowest of the oil properly

Prevent blowouts through appearing as a sealant