JNTU
JNTU B.Tech III DRILLING TECHNOLOGY Previous Question Paper (May - 2018 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART - A
(25 Marks)
Define the process of drilling an oil and gas well.
Answer
Drilling is the process of creating a hole in the earth's subsurface using a rotary drilling rig, which involves rotating a drill string with a bit at the bottom to mechanically disintegrate rock, while simultaneously circulating drilling fluid to remove cuttings and maintain wellbore stability.
State the importance of drilling.
Answer
Drilling is essential for exploring and evaluating subsurface geological formations, providing the only direct means to access and extract hydrocarbon resources, and enabling the installation of completion equipment required for the safe and efficient production of oil and gas.
Difference between oil based and water based mud.
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What do you understand by SWAB and SURGE pressures?
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State the scenario that gives rise for the need of directional drilling.
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State the types of deflection tools used for the Directional drilling.
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What circumstances give rises to a Kick in the wellbore?
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What do you understand by formation Damage?
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Name four types of wastes associated with the drilling.
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State the objective of Drill Stem Testing (DST).
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PART - B
(50 Marks)
Illustrate a schematic diagram of a Drilling Rig and neatly label all the parts.
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Describe various types of Drilling.
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With the help of a diagram explain the drill string assembly.
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Provide a short note on the classification of Drill Bits.
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State the additives of the drilling fluid and their properties.
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Explain the role of nozzles in drilling.
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What is the function of a drilling fluid?
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Why cementing operation is a crucial step in drilling? State the reasons for the same.
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What is directional drilling?
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What do you understand by fishing operation?
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Give a brief on ERD.
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How measurement while drilling (MWD) is useful in the Directional Drilling operations?
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Explain different types of pipe sticking.
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Explain weight and wait method of well control.
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State the mechanism of clay swelling?
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Explain the measures of Kick Control.
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Explain the waste water disposal techniques.
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Explain Drill Stem Testing (DST) with appropriate diagram.
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State the environmental damages that waste water from drilling imposes.
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Explain in detail how pressure chart analysis can help in estimating the flow rates.
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