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2003 Course Oil Well Drilling Eng.

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Total No. of Questions : 12] P1495 [Total No. of Pages :5 [3764] - 380 B.E. (Petroleum) OIL WELL DRILLING ENGINEERING (2003 Course) Time : 3 Hours] [Max. Marks:100 Instructions to the candidates: 1) Answer 3 questions from section I and 3 question from section II. 2) Answer to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 6) Assume suitable data, if necessary. SECTION - I Q1) a) A3.5'' drill pipe ,13.3 ppf grade S135 premium class is used to run 4.5'' O.D. liner to 21,000 ft. If length of drill pipe is 17,500 ft, mud weight is 120 pcf. Total weight of liner is 50,000 lbs calculate stretch in drill pipe. [6] b) Explain in brief, importance & different parameters considered while making Geo technical order. [6] c) Using following bit performance record & drilling records, determine out of 3 bits which bit gives lowest drilling cost. If the hourly operating cost of rig is 40,000Rs/hour and trip time is 10 hours. The connection time is included in the rotating time. Drilling record for thick shale section at 12,000ft. [6] BIT Bit cost (Rs) Interval drilled (ft) Rotating Time (hrs) A 28,000 106 9 B 160,000 415 62 C 320,000 912 153 OR P.T.O.

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