Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech III DRILLING TECHNOLOGY Previous Question Paper (November/December - 2017 - 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.
Part A
What are the major components of drilling rig?
Answer
The major components of a drilling rig include the hoisting system, rotating system, circulating system, power system, and the well control system (BOP stack).
What materials are used for drilling bits?
Answer
Drilling bits are primarily manufactured using tungsten carbide inserts, polycrystalline diamond compacts (PDC), and high-strength steel alloys for the bit body to withstand high impact, abrasion, and thermal loads.
What tests are performed on drilling fluid?
Answer
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What is Portland cements and mention its applications.
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How the well trajectory is planned?
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Explain about build, hold in directional drilling?
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What is struck pipe equation? Explain its importance.
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What are the causes of damage of well?
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How the reservoir pressure is tested?
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How to manage hazardous fluids?
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Part B
How the drilling team is chosen for effective drilling of well.
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What are the various factors to be considered in selecting a site for drilling a well?
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Explain the working of roller cone and fixed cutter bits and mention their relative advantages.
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What is the effect of buoyancy on hook load and explain the method of calculating hook load?
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What are the various diagnostic tests be performed to find the quality of fluid at regular intervals.
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How the sand content and mud-content will be checked and explain its effect during drilling?
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What are the various types of muds developed while drilling and explain about high salinity muds and oil muds.
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What is the effect of kick in the oil wells and explain its identification and methods to control.
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What are the reasons for directional drilling and mention its effects on the well.
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What are the various factors to be considered in planning and drilling of a well?
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Differentiate between angle average method and minimum curvature method used in directional drilling.
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What is critical buckling force and how it can be calculated.
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Why struck pipe is formed in drilling and explain the methods in preventing its formation.
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How the key seating and Bore hole geometry are responsible in struck pipe elimination.
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What are the effects of inadequate cleaning and junk in the borehole during directional drilling?
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What are the causes of kick formation and explain about Rig-control and mud control.
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What are the various components to be considered in drill stem testing and explain about the collection of fluid samples.
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Sketch and explain the drill stem test tool string and mention various safety measures to be considered.
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What are the various types of waste fluids come out from the well and explain the methods to manage them.
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How the waste fluids are used for land farming and mention its effects.
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