Page 238 - Introduction to Petroleum Engineering

ACTIVITIES 225
11.9 ACTIVITIES

11.9.1 Further Reading

For more information about surface facilities, see Hyne (2012), Raymond and Leffler
(2006), and van Dyke (1997).

11.9.2 True/False
11.1 A semisubmersible is a deepwater drilling platform that floats on pontoons.
11.2 Dynamic positioning is used to keep an offshore drilling rig on station by
computer.
11.3 A barge, jack‐up, or semisubmersible is often used to work over deepwater
wells.
11.4 In a two‐phase separator, gas rises to the top of the separator while the liquid
falls to the bottom.

11.5 The wellhead includes the casing head, tubing head, and conductor pipe.
11.6 Helipads are required on all offshore platforms.
11.7 Oil and gas storage tanks are considered pressure vessels.
11.8 Crude oil is converted into transportation fuel at the separator.

11.9 Fluid flow in pipe depends on the friction of the pipe.
11.10 Reynolds number is the dimensionless ratio of inertial forces to viscous forces.

11.9.3 Exercises
11.1 Estimate the k‐value for propane at 100°F and 150 psia. Use P c 616 psia,
T c 206 F, and 015.
.
11.2 Perform the two‐phase check on a mixture with 80 mol% methane, 15 mol%
propane, and 5 mol% n‐pentane using the k‐values in Example 11.3 for 100°F
and 150 psia.
11.3 Perform the two‐phase check on a mixture with 1 mol% methane, 9 mol%
propane, and 90 mol% n‐pentane using the k‐values in Example 11.3 for
100°F and 150 psia.
11.4 A spherical gas tank is fabricated by bolting two 0.5‐in.‐thick steel hemi-
spheres together. If the gas is at a pressure of 500 psi, determine the inner and
outer radii of the spherical tank if the maximum allowed surface stress is
10 ksi (1ksi 1000psi).
11.5 Calculate the volume in a section of cylindrical pipe with inner diameter
3
ID 6 in. and length L 30 ft. Express your answer in ft .