JNTU
JNTU B.Tech III WELL COMPLETIONS Previous Question Paper (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 do you understand by appraisal well?
Answer
An appraisal well is drilled after a discovery well to evaluate the size, extent, and commercial viability of a hydrocarbon reservoir. It provides critical data on reservoir properties, fluid characteristics, and connectivity to determine if field development is economically feasible.
Explain briefly about relief well drilling.
Answer
Relief well drilling is an emergency procedure used to intersect a blowout well at depth. By drilling a secondary wellbore to reach the target formation, heavy kill fluids can be pumped directly into the blowout well to regain pressure control and stop the uncontrolled flow of hydrocarbons.
What is slip joint?
Answer
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Write short note on pulse testing.
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What is the function of packer part ‘cone’?
Answer
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Write short note on packer setting mechanism.
Answer
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Write down the applications of production tubing.
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Explain about the function of tubing.
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What is the advantage of predrilled liner completion?
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Write short note on well servicing.
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Part B
What is the effect of poor completion design? Explain it.
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Write brief note on overbalanced perforation.
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Describe about API completion selection guide for well.
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Explain different factors which influence well completion design.
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Write brief note on underbalanced perforation.
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Explain briefly about the barefoot completion.
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What is RFT? How will we perform it?
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What do you understand by single zone testing? Explain it.
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Write different functions of tubing fill test valve.
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What is DST? How will we perform it?
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What do you understand by multiple zone testing? Explain it.
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Write different functions of IRIS dual valve.
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Write down the use of different packer parts in brief.
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Which packer is more suitable for gas well and why? Explain it.
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Explain briefly about well head by using neat sketch.
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Write down the purpose of using packer in brief.
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Write down different features of swell packers.
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How do we set packer in the well? Explain the mechanism.
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What are the parameters used to define tubing? Describe those parameters.
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Find out the value of burst and tubing load when the internal and outer pressure of the tubing are 5000 psi and 3500 psi, weight of tubing 4.3 ppf, length of tubing 11000 ft and tension require to set the packer 500 p.
Answer
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Write down the most common tubing steel grades. Explain it.
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Find out the erosional velocity when gas gravity is 0.64, liquid gravity is 0.87, operating pressure 4000 psi, gas liquid ratio is 0.45 and temperature is 600 F.
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Explain the parameter drift diameter of tubing characteristics.
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What is HP HT well? When will we consider a well as HP HT?
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Write difference between cased hole completion and open hole completion.
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Write some of the disadvantages of liner and external casing packers in brief.
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What is the advantage of open hole completion? Explain it.
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How is seal failure leads to external casing packer failure? Describe it.
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Write down different steps involved in work over planning in brief.
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