# Pune University BE Well Engineering and Design Question Papers

B.E. (Petroleum Engineering) WELL ENGINEERING AND DESIGN (2008 Pattern) (Sem. – I)

Time :3 Hours]                                                                                              [Max. Marks :100

Instructions to the candidates:

1)            Question No. I and 5 are compulsory. Out of the remaining attempt 2 questions from Section I and 2 questions from Section II.

2)            Answers to the two sections should be written in separate books.

3)            Neat diagrams must be drawn wherever necessary.

4)            Pigures 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

QI) a) Discuss importance of drilling montage in well planning. Discuss classification of well types.                                                                                                                                               [8]

b)             In a leak off test volume pumped is 8.5 bbls leak of pressure noted is 1300 psi casing is set at 12,000 ft and the mud weight is 13.9 ppg. Determine the formation fracture gradient.        [4]

c)              13 – 3/8″ intermediate casing set at 9750 ft external mud weight 11.0 ppg, internal mud weight 11.2 ppg, drilling ahead 12-1/4″ hole at 13,360 ft, experienced total losses and fluid level dropped to 2528 ft find out net collapse load at casing shoe. (Fluid level dropped inside casing) [6]

Q2) a) Derive equations for calculating increments AV, AN and AE by Radius of curvature directional survey method.                                                                                                                    [8]

b)               Discuss BHA design considerations in directional/horizontal drilling in brief.                                                                                                                                         [8]

Q3) a) Discuss primary, secondary and tertiary well control. Explain any one type of well control method in detail.                                                                                       [10]

b)  IfSIDPP = 500psi                 [6]

SICP = 650 psi

well depth = 10,000 ft, Mud weight used = 10.7 ppg SCR at 30 SPM = 200 psi Find out

i)                 Kill mud weight.

ii)                ICP.

iii)               FCP.

Q4) Write short notes on :                                                                                                                                                                                                                                                               [16]

a)             Trip margin.

b)             Collapse and Burst pressure in casing design.

c)             Deflection tools.

d)            BOP control unit.

SECTION – II

Q5) a) Discuss API classification of drill string components.                                                                                                                                                                                                               [8]

b)             5″ D/P in 12.25″ hole at 60° inclination, critical buckling force = 26,000 lbs, calculate BHA weight. Safety factor = 0.8 WOB = 50,000 lbs

1. F. = 0.832.                                                                                                                                                                                                                                             [4]

c)             Discuss different costs in AFE calculations.                                                                                                                                                                                                    [6]

Q6) a) Discuss criteria of optimum hydraulics in detail.                                                                                                                    [8]

b) Discuss Bingham plastic and Power law model of hydraulics in brief. [8]

Q7) a) Discuss different squeeze cementation methods in brief.       [10]

b) What is cycle speed and commercial speed calculate both for the following operations.                         6]

11th September to 30th September – Rig move, rig building time. 1st October to 10th January – drilling days production testing days = 20 days. Meterage drilled = 3200 m.

Q8) Write short notes on :                                                      [16]

a)             Margin of overpull (MOP)

b)             Cement rhology.

c)             Bit selection.

d)            Down hole problems.