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Research Papers: Petroleum Engineering

Effect of Particle Size and Liquid Viscosity on Erosion in Annular and Slug Flow

[+] Author and Article Information
N. R. Kesana

Department of Mechanical Engineering,
University of Tulsa,
Tulsa, OK 74104
e-mail: nrk301@utulsa.edu

J. M. Throneberry

New Dominion LLC,
1307 S Boulder Avenue # 400,
Tulsa, OK 74119
e-mail: jon-throneberry@utulsa.edu

B. S. McLaury

Department of Mechanical Engineering,
University of Tulsa,
Tulsa, OK 74104
e-mail: brenton-mclaury@utulsa.edu

S. A. Shirazi

Department of Mechanical Engineering,
University of Tulsa,
Tulsa, OK 74104
e-mail: siamack-shirazi@utulsa.edu

E. F. Rybicki

Department of Mechanical Engineering,
University of Tulsa,
Tulsa, OK 74104
e-mail: ed-rybicki@utulsa.edu

Contributed by the Petroleum Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received October 12, 2012; final manuscript received June 9, 2013; published online September 12, 2013. Assoc. Editor: Sarma V. Pisupati.

J. Energy Resour. Technol 136(1), 012901 (Sep 12, 2013) (10 pages) Paper No: JERT-12-1239; doi: 10.1115/1.4024857 History: Received October 12, 2012; Revised June 09, 2013

Erosion measurements in multiphase slug and annular flow regimes have been made in a horizontal 76.2 mm (3-in.) diameter pipe. These flow regimes are selected since they produce higher metal losses than other flow regimes, and they also occur for a wide variety of operating conditions. Experiments are performed with superficial gas velocities ranging from 15.2 m/s (50 ft/s) to 45.7 m/s (150 ft/s) and superficial liquid velocities ranging from 0.46 m/s (1.5 ft/s) to 0.76 m/s (2.5 ft/s), for liquid viscosities of 1 cP and 10 cP. Three different sand sizes (20, 150, and 300 μm sand) were used for performing tests. The shapes of the sand are also different with the 20 and 300 μm sand being sharper than the 150 μm sand. Erosion measurements are obtained using electrical resistance (ER) probes which relate the change in electrical resistance to the change in the thickness of an exposed element resulting from erosion. Two probes are placed in a bend and another probe is placed in a straight section of pipe. The probes in the bend are flat-head probes, and they are placed flush with the outer wall in the 45 deg and 90 deg positions. The probe in the straight pipe is an angle-head probe which protrudes into the flow with the face placed in the center of the pipe.

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References

Figures

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Fig. 1

Plug flow/elongated bubble flow (not to scale)

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Fig. 2

Slug flow (not to scale)

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Fig. 3

Pseudo slug flow/annular-slug flow (not to scale)

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Fig. 4

Annular flow (not to scale)

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Fig. 5

Schematic of the experimental facility

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Fig. 6

Angle-head and flat-head ER probes

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Fig. 7

Location of flat-head and angle-head probes inside the pipe

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Fig. 8

Screen shot of cormon software showing sample output in a 3 in. diameter pipe

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Fig. 9

Influence of sand size on erosion for different operating conditions with 1 cP liquid viscosity using 3 different sand sizes 20, 150, and 300 μm measured using ER probe oriented at 45 deg to the bend

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Fig. 10

Influence of sand size on erosion for different operating conditions with 10 cP liquid viscosity using three different sand sizes 20, 150, and 300 μm measured using ER probe oriented at 45 deg to the bend

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Fig. 11

Influence of sand size on erosion for different operating conditions with 1cP liquid viscosity using 3 different sand sizes 20, 150, and 300 μm measured using angle-head ER probe

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Fig. 12

Influence of sand size on erosion for different operating conditions with 10 cP liquid viscosity using 3 different sand sizes 20, 150, and 300 μm measured using angle-head ER probe

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Fig. 13

Influence of viscosity on erosion magnitudes using 150 μm sand size measured using ER probe oriented at 45 deg to the bend

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Fig. 14

Influence of viscosity on erosion magnitudes using 300 μm sand size measured using ER probe oriented at 45 deg to the bend

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Fig. 15

Comparison of erosion magnitudes measured using ER probes mounted at 45 deg and 90 deg to the bend using 20 μm sand particles

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Fig. 16

Comparison of erosion magnitudes measured using ER probes mounted at 45 deg and 90 deg to the bend using 150 μm sand particles

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Fig. 17

Comparison of erosion magnitudes measured using ER probes mounted at 45 deg and 90 deg to the bend using 300 μm sand particles

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Fig. 18

Comparison of erosion magnitudes for a probe at 45 deg to the bend and the angle-head probe mounted into the straight section of pipe for the 20 μm sand particles

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Fig. 19

Comparison of erosion magnitudes for a probe at 45 deg to the bend and the angle-head probe mounted into the straight section of pipe for the 150 μm sand particles

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Fig. 20

Comparison of erosion magnitudes for a probe at 45 deg to the bend and the angle-head probe mounted into the straight section of pipe for the 300 μm sand particles

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