A drilling rig is pulling a drill string at velocity of 30 ft/min. If the weight of the drill string is 450,000 lbf, calculate the output horse power if the rig engines are running at speed of 1350 rpm
Anonymous Quiz
17%
904
25%
309
11%
209
47%
409
The mud properties that are responsible for removing the cutting out of the well are
Anonymous Quiz
69%
a) Gel strength and viscosity
12%
b) Gel strength and density
16%
c) Viscosity and density
3%
d) None of the above
The general formula of naphthenes is
Anonymous Poll
28%
(A) CnH2n+2
35%
(B) CnH2n-6 (where, n ≥ 6)
10%
(C) CnHn-4
26%
(D) Same as that for olefins i.e. CnH2n
Carbon percentage (by weight) in crude petroleum may be about
Anonymous Poll
30%
(A) 65
23%
(B) 75
37%
(C) 85
10%
(D) 95
Which of the following has maximum hydrogen/carbon ratio (by weight)?
Anonymous Poll
36%
(A) Naphtha
37%
(B) Gasoline
13%
(C) Diesel
13%
(D) Fuel oil
The torque on a motor shaft follows a sinusoidal pattern with a maximum amplitude of 8,000 ft-lbf. The torque will always be positive through the cycle. Shaft speed is 200 rpm. Calculate the motor horsepower.
Anonymous Poll
40%
3214
36%
1219
21%
5521
3%
7321
Subsea wells may be installed individually, in a clusters, or on a template where the reservoir fluids from all the wells are channeled to a manifold that is tied back to a host platform.
Template System: A subsea production facility where the wells, connectionsand manifolds are on a common supporting structure or template.
Cluster Well System: A centrally located manifold around which independent satellite wells are clustered. These wells individually connect to theproduction manifold.
Which type of system is shown above ?
Template System: A subsea production facility where the wells, connectionsand manifolds are on a common supporting structure or template.
Cluster Well System: A centrally located manifold around which independent satellite wells are clustered. These wells individually connect to theproduction manifold.
Which type of system is shown above ?
What will be the effect on permeability when specific surface decreases?
Anonymous Poll
42%
a) Decrease
42%
b) Increase
17%
c) Remains same
Estimate the total theoretical maximum overpressure gradient in lb/feet3 if the specific gravity of is earth crust taken equal to 2.7. Consider porosity of average sedimentary rock equals to 20 %. The specific gravity of saltwater taken to be 1.07.
Anonymous Quiz
13%
120
29%
152
51%
148
8%
190
Unconventional reservoirs are not characterised by _____
Anonymous Quiz
16%
Low Permeability
16%
Same Reservoir & Source Rock
22%
Large Areal Extent
47%
Uniform Reservoir Properties
Which one of the following logging techniques is most suitable to detect a shale layer sandwiched between two sandstone layers?
Anonymous Quiz
37%
Neutron-Gamma
24%
Gamma-Gamma
28%
Natural Gamma
11%
Sonic
There are known effects of gas on logging tool responses. Which of the following statements is correct?
Anonymous Quiz
16%
Density log porosities are not affected by gas
38%
Neutron log porosities are increased by gas
27%
NMR log porosities are reduced by gas
19%
Sonic log porosities are reduced by gas
__________represents the relative effect of viscous forces and surface tension acting across the interface between two immiscible liquids.
Anonymous Quiz
74%
a) capillary number
23%
b) Reynolds number
3%
c) Formation volume factor
DIRECTION, MOTION & ENVIRONMENTAL FORCES at OFFSHORE
Wind force is given by
Fw = 0.00338 (Vw)^2 *Ch *Cs* A
where Fw = wind force, lbf,
VA = wind velocity, knots,
Cs = shape coefficient,
Ch - height coefficient, and
A = projected area of all exposed surfaces, sq. ft.
Current force is given by
Fc=gc*(Vc )^2*Cs*A,
where Fc = current drag force, lbf,
Vc = current velocity, ft/sec,
Cs =drag coefficient same as wind coefficient, and
A = projected area of all exposed surfaces, sq. ft.
Wind force is given by
Fw = 0.00338 (Vw)^2 *Ch *Cs* A
where Fw = wind force, lbf,
VA = wind velocity, knots,
Cs = shape coefficient,
Ch - height coefficient, and
A = projected area of all exposed surfaces, sq. ft.
Current force is given by
Fc=gc*(Vc )^2*Cs*A,
where Fc = current drag force, lbf,
Vc = current velocity, ft/sec,
Cs =drag coefficient same as wind coefficient, and
A = projected area of all exposed surfaces, sq. ft.