JNTU
JNTU B.Tech III WELL COMPLETIONS Previous Question Paper (May - 2019 - R15)
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 are horizontal wells? Mention its advantages.
Answer
Horizontal wells are wells drilled at an angle of approximately 90 degrees from the vertical to traverse a significant length of the reservoir. Their primary advantages include increased reservoir exposure, higher production rates, improved recovery from thin or low-permeability formations, and reduced water or gas coning issues.
Summarize the main functions of well completion.
Answer
The main functions of well completion are to provide a safe and controlled conduit for fluid flow from the reservoir to the surface, ensure zonal isolation to prevent fluid migration between formations, protect the casing and wellbore integrity, and allow for efficient reservoir monitoring and stimulation throughout the life of the well.
What are the advantages of the cased and perforated completion over the open hole completion?
Answer
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Write notes about drill stem test procedure for well testing.
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What are Sliding sleeves? Give its limitations.
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Enumerate the retrievable packer setting mechanisms.
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List the constructional features of Slant Well production tubing string.
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Mention the effects of temperature on tubing string design.
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What are the uses of Scrubbing?
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Summarize the applications and objectives of well servicing and stimulation.
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Part B
Describe the factors to be considered for selecting well completion mode and method.
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Write notes about open hole completions procedure.
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Discuss the types of reservoir completion and the upper completion methods for oil and gas wells.
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Explain the mechanical aspects of drill stem testing at depth.
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Discuss the basic typical steps in a cased hole gravel pack.
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Describe the principle of wireline casing gun perforation method and tubing - conveyed perforation method.
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Enumerate the factors determining the choice of packer types.
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Describe the methods for shutting – off water in oil and gas wells.
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Explain the working principle of side-pocket gas lift mandrel with a sketch.
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Write about data acquisition methods for oil wells.
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Explain the design aspects of tubing string based on size and material of construction.
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Discuss the selection of tubing material based on corrosive media present.
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With neat sketch, explain the separate - layer production tubing string technology and sucker - rod pumping well production tubing string technology.
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Describe the following well servicing techniques: Wire line and Coiled tubing.
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What are the importances of scrubbing unit in well completion?
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Describe the methods for high pressure – high temperature wells completion.
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Write about Hydraulic fracturing method for well stimulation.
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