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2003 Course Oil Well Drilling Eng.

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Total No. of Questions : 12] [Total No. of Pages : 3 P1283 [3664]-317 B.E. (Petroleum) OIL WELL DRILLING ENGINEERING (2003 Course) (New) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer Q. no. 1 or Q. no. 2, Q. no. 3 or Q. no. 4, Q. no. 5 or Q. no. 6 from Section-I and Q. no. 7 or Q. no. 8, Q. no. 9 or Q. no. 10, Q. no. 11 or Q. no. 12 from Section - II. 2) 3) 4) 5) 6) Answers to the two sections should be written in separate books. Neat diagrams must be drawn wherever necessary. Figures to the right indicate full marks. Use of logarithmic tables, Slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. Assume suitable data, if necessary. SECTION - I Q1) a) To achieve the basic functions of drilling fluids; which side effects or hole problems must be minimized? List at least six. [6] b) What is well planning? Write drilling cost formula and explain with equations, how drilling cost predictions are useful in well planning.[12] OR Q2) Write a short note on : a) Top Drive. [18] b) Journal Angles in Roller Cone Bits. c) Toolface orientation. d) Preventing stuck pipe and procedure to remove stuck pipe. Q3) a) A 12 ppg mud is being circulated at 400 gpm. The 5.0 in drillpipe has an internal diameter of 4.33 inch and the drill collars have an ID of 2.5 inch. The bit has a diameter of 9.875 inch. Calculate the average velocity in the [8] i) Drill pipe. ii) Drill collars. iii) Annulus opp. to drill pipe in ft/s. b) Describe in detail the overall factors affecting rig hydraulics program. Also write the general objectives of mud hydraulics to be designed for a rig. [8] P.T.O.

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