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Technical Brief

Pressure Profile in Annulus: Solids Play a Significant Role

[+] Author and Article Information
Feifei Zhang

McDougall School of Petroleum Engineering,
University of Tulsa,
2450 East Marshall Street, NCDB,
Tulsa, OK 74110
e-mail: Feifei-zhang@utulsa.edu

Stefan Miska

Professor
McDougall School of Petroleum Engineering,
University of Tulsa,
2450 East Marshall Street, NCDB,
Tulsa, OK 74110
e-mail: Stefan-miska@utulsa.edu

Mengjiao Yu

Associate Professor
McDougall School of Petroleum Engineering,
University of Tulsa,
2450 East Marshall Street, NCDB,
Tulsa, OK 74110
e-mail: Mengjiao-yu@utulsa.edu

Evren M. Ozbayoglu

Associate Professor
McDougall School of Petroleum Engineering,
University of Tulsa,
2450 East Marshall Street, NCDB,
Tulsa, OK 74110
e-mail: Evern-ozbayoglu@utulsa.edu

Nicholas Takach

Professor
Department of Chemistry Engineering,
University of Tulsa,
2450 East Marshall Street, NCDB,
Tulsa, OK 74110
e-mail: nicholas-Takach@utulsa.edu

1Corresponding author.

Contributed by the Petroleum Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received September 11, 2014; final manuscript received June 9, 2015; published online June 30, 2015. Assoc. Editor: G. Robello Samuel.

J. Energy Resour. Technol 137(6), 064502 (Nov 01, 2015) (9 pages) Paper No: JERT-14-1293; doi: 10.1115/1.4030845 History: Received September 11, 2014; Revised June 09, 2015; Online June 30, 2015

This paper looks into the effects of solids on the wellbore pressure profile under different conditions. An extensive number of experiments were conducted on a 90-ft-long, 4.5 in. × 8 in. full-scale flow loop to simulate field conditions. The flow configurations are analyzed. A solid–liquid two-phase flow configuration map is proposed. Significant difference is found between the pressure profile with solids and without solids in the wellbore. The results of this study show how the pressure profile in the wellbore varies when solids present in the annulus, which may have important applications in drilling operations.

Copyright © 2015 by ASME
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References

Figures

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Fig. 7

Configuration of packed-dune flow

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Fig. 8

Picture of packed-dune flow

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Fig. 9

Configuration of dispersed-dune flow

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Fig. 10

Picture of dispersed-dune flow

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Fig. 6

Picture of down-hole side of the wave in waved-bed flow

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Fig. 5

Picture of up-hole side of the wave in waved-bed flow

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Fig. 4

Configuration of waved-bed flow

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Fig. 3

Picture constant-bed flow

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Fig. 2

Configurations of the constant-bed flow

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Fig. 1

Schematic drawing of LPAT flow loop

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Fig. 11

Flow configuration map

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Fig. 12

SF with 0 rpm at 45 ft/hr for water

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Fig. 13

SF with 100 rpm at 45 ft/hr for water

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Fig. 14

Total pressure loss for 90 deg tests with water

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Fig. 15

SF with 0 rpm for the non-Newtonian fluid

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Fig. 16

SF with 100 rpm for the non-Newtonian fluid

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Fig. 18

Particle contact angle

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Fig. 19

Solids concentration verification

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Fig. 20

Pressure gradient verification

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Fig. 17

Segment model geometry

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