JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III Year DRILLING TECHNOLOGY Previous Question Paper (November/December - 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
What is the purpose of casing?
Answer
Casing is installed to prevent borehole collapse, isolate unstable formations, protect freshwater aquifers from contamination, and provide a secure foundation for the installation of blowout preventers and wellhead equipment.
What are the basic principles of drilling process?
Answer
The drilling process relies on three fundamental principles: mechanical rock destruction using a drill bit, continuous circulation of drilling fluid to remove cuttings and cool the bit, and wellbore stability maintained through hydrostatic pressure control and casing support.
Write a short note on the minimize formation damage.
Answer
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Give the composition of drilling fluid.
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Explain what is meant by “nudging” and why it is done.
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State one advantage and two disadvantages of a standard removable whip stock as a deflection tool.
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What is meant by stuck pipe?
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What is the typical sequence of events that may be observed if a kick is taken during a connection?
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Write a short note on the Johnston hydraulic test.
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Define drill stem test.
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Part B
Define the drilling. Explain about the cable tool drilling and rotary drilling.
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What are the different types of the drilling wells?
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Discuss about the Rotary Bit Technology.
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Explain about the Drilling string basics.
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10,000 ft. of 5 ½ in. casing is to be cemented in an 8-in. hole. Desired fill up is 2500 ft. The cement to be used is API class A with 4% gel. Desired slurry density is 13 lb/gal.
How many sacks are required, if an excess factor of 1.20 is used?
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How much water will be needed for mixing and displacing the slurry from the pipe?
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Explain about the casing types and specifications.
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Discuss about the primary oil well cementing techniques.
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Determine the horizontal well design consideration.
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Explain about the well control in high-angle and horizontal wells.
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Discuss about the down hole tools affecting directional control.
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Explain about the directional measurement and Surveying.
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How to determine the Variables in the Stuck Pipe Equation?
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Describe about the pressure control theory.
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Explain about the preventing Stuck Pipe.
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What are the steps taken if stuck pipe occurs in geopressured, reactive or unconsolidated formations?
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Discuss about the wire line formation testing.
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Explain about the disposing of the drilling fluids waste and drill cuttings waste.
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Explain about the pressure-chart interpretation.
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Discuss about the fluid – recovery interpretation.
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