# B.E. (Petroleum Engineering) TRANSPORT OF OIL AND GAS (2008 Pattern) (Elective – III) (Sem. – II)

Time : 3 Hours]                                                                                            [Max. Marks : 100

Instructions to the candidates:

1)         Answer Q. No. 1 or 2, Q. No. 3 or 4, Q. No. 5 or 6from section-I and Q. No. 7 or 8, Q. No. 9 or 10, Q. No. 11 or 12 from section-II.

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

3)          Pigures to the right indicates full marks.

4)         Neat diagram should be drawn wherever necessary.

5)          Use a non programmable calculator.

6)         Assume suitable data if necessary and clearly state it.

SECTION – I

QI) a) Draw neat sketches and explain flow regimes in horizontal and vertical multiphase pipeline.                                                                                                                                [8]

b) Explain the following :                                                                                          [8]

i)             Gathering System.

ii)           Oil and gas Storage Tanks.

OR

Q2) Write short note on :                                                                                [IT]

a)        Trunk line system.

b)        Role of flow improvers.

c)        Factors affecting oil and gas flow characteristics.

d)        Complex flow system for oil and gas.

Q3) a) Describe pressure loss considerations in oil and gas pipe line. [8]

b)          How will you calculate line size and pipe wall thickness in design of oil and gas pipeline?                                                                                                                         [8]

OR

Q4) Given : flow rate of gas is 23 MMSCFD                                                                [16]

Viscosity = 3 cp Gas gravity = 0.85 Length = 7000 ft Inlet pressure = 900 psi Temperature = 80°F Gas viscosity = 0.013

Roughness factor = 0.004 (assume old steel)

Z = 0.67 E = 0.95

Problem : Solve for pressure drop in a 4-in. and 6-in. ID line using the :

1. General Equation.
2. Assumption of AP < 10% PI.
3. Panhandle B Equation.
4. Weymouth Equation.

Q5) a) Discuss in brief about leak and ruptures in pipeline maintenance and repair.         [8]

b) Classify different types of valves used in oil and gas transport operation and explain in detail any one with neat sketch.                                                             [10]

OR

Q6) a) Explain in detail about Pigging operations and equipments with a neat sketch?    [8]

b)        What do you mean by testing of oil and gas pipelines? Explain. [5]

c)        Write about different flow meters used oil and gas transport.                   [5]

SECTION – II

Q7) a) Give advantages and disadvantages of centrifugal and reciprocating pumps?       [8]

b)        Explain with a neat sketch construction, working and principle of rotary pump?        [8]

OR

Q8) a) Explain with a neat sketch construction, working and principle of reciprocating compressor?                                                                                                         [8]

b) Given following information of a centrifugal compressor answer the following conditions :

Operating conditions : Ps = 750 psia, Pd = 1046.4 psia, Ts = 529.7 deg R, Td = 582.6 deg R, Q g, sc = 349 MMSCFD Gas properties : SG = 0.6, k = 1.3, Zavg = 0.95 Calculate :

1. Isentropic efficiency?
2. Actual volumetric flow rate?
4. Power requirement (assume 98% mechanical efficiency)? [8]

Q9) a) What is gas monetization? Explain in brief different methods of gas monetization?                                                                                                     [8]

b) Explain the following conversions :                                                                  [8]

i)              Gas to liquid.

ii)           Gas to ammonia and urea.

OR

QI 0) Explain in brief :                                                                 [16]

a)        Marginal gas field.

b)        Associated gas reserves.

c)        Methanol production using gas.

d)        Power generation using natural gas.

QII) a) Discuss in detail subsea challenges for installing, operating and troubleshooting of oil and gas pipelines?                                                                                    [8]

b) Write short note on :                                                                                           [10]

i)             Economics of long distance oil and gas pipelines.

ii)           Flow assurance.

OR

Q12) a) Explain in detail about Asphaltene, wax and hydrate formation and inhibition?                                                                                                                               [8]

b) Write short note on :                                                                                           [10]

i)              Subsea pipeline supervision and safety.

ii)           Subsea pipeline heat transfer and thermal insulation.