Measurement and simulation of pressure wave attenuation in upward air–water bubbly flow

Wang, H; Priestman, G. H.; Beck, Steven; Boucher, R.F.

doi:10.1016/s0142-727x(99)00052-1

Cited by 13 publications

(11 citation statements)

References 32 publications

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“…Similar results are reported in the literature, for example in Ref. [2], that the attenuation of pressure signals increases with increasing volume fraction of vapor in the fluid where the pressure waves propagate. It should, however, be noted that the MSO design can easily be modified to accommodate lower bottomhole pressure (BHP) as in this example to avoid cavitations.…”

Section: B a Novel Design Approachsupporting

confidence: 91%

“…In the case of the backpressure valve, it means that if the pressure drop at the valve is too large, then there is a good possibility that the absolute pressure in the downstream of the valve will get close to or below the vapor pressure, considering the low bottomhole pressure nature of depleted reservoirs. The resulted two-phase flow of liquid and its vapor around the valve is a dissipative medium and not incompressible anymore, and hence, its propagation capability for the pressure signals can vanish or be greatly impaired, as shown by some other experimental measurements [2].…”

Section: A the Root Causementioning

confidence: 99%

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Backpressure Valve for Subhydrostatic Wells

Tunc

Pipchuk

et al. 2011

All Days

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Subhydrostatic or low bottomhole pressure wells are wells with large hydrostatic overbalance, that is, the hydrostatic pressure of the fluid column inside coiled tubing, drillpipe, or similar well intervention means is greater than the wellbore pressure at the corresponding vertical depth. The number of subhydrostatic wells is growing as more and more fields mature. Consequently, there is an increasing number of interventions required for these wells to improve and/or optimize their production. U-tubing of the fluid column is a very common and uncontrolled phenomenon during interventions in subhydrostatic wells that can cause problems. In this paper the focus will be on coiled tubing interventions; however, the same basic principles apply to other areas as well.A backpressure valve (BPV) is a device that is used in subhydrostatic wells to hold the fluid column inside coiled tubing to prevent U-tubing. The BPV compatibility with other components in the toolstring is a critical operational requirement. Following recent tests conducted with the BPVs readily available in the market, it has been shown that these are not appropriate for a number of applications. One example is an application involving pressure pulse telemetry. For pressure pulse telemetry, conventional BPVs either cannot pass the pressure signals or greatly attenuate the magnitude of them.A backpressure valve that is fully compatible with pressure pulse telemetry has been developed and will be presented in this paper. The root cause of why the conventional BPVs were not able to transmit pressure pulse will be discussed using the results from fundamental physics, computational fluid dynamics analysis, and lab and filed experiments. Finally, a typical set of results from a field trial using the new valve will be presented.

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Section: B a Novel Design Approachsupporting

confidence: 91%

Section: A the Root Causementioning

confidence: 99%

Backpressure Valve for Subhydrostatic Wells

Tunc

Pipchuk

et al. 2011

All Days

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“…The air above the pile tended to suppress fluctuation of Δp(t) [31]. Also, the friction of the small particle with the interstitial gas reduced the energy of the longitudinal wave [32,33]. Consequently, when the longitudinal wave travelled upwards along the z-axis, it gradually attenuated.…”

Section: (A)-5(d)mentioning

confidence: 99%

“…With these operations, Eq. (9) was rewritten as follows: D C p f    (33) We focused on the non-dispersed case, i.e. the σ 2 = 0 cases.…”

Section: Mathematical Solution and Analysis Of The Dynamical Equationmentioning

confidence: 99%

Behaviors of spherical intruder in 3-D vertically vibrating granular system with vertical longitudinal air pressure wave

Xie

et al. 2015

Powder Technology

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“…The gas bubbles visibly deform as waves pass. 9 The ability of a gas to "absorb" the energy of an acoustic signal is a function of pressure and volume. If a gas-filled (but not stretched) flexible enclosure is placed at great depth, it can still compress, but it cannot compress as much for the same pressure disturbance and volume.…”

Section: Theory Of Suppressionmentioning

confidence: 99%

Empirical Study Of Tube Wave Suppression For Single Well Seismic Imaging

West¹,

Weinberg²,

Fincke³

2002

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This report addresses the Idaho National Engineering and Environmental Laboratory's portion of a collaborative effort with Lawrence Berkeley National Laboratory and Sandia National Laboratories on a borehole seismic project called Single Well Seismic Imaging. The INEEL's role was to design, fabricate, deploy, and test a number of passive devices to suppress the energy within the borehole. This energy is generally known as tube waves. Heretofore, tube waves precluded acquisition of meaningful single-well seismic data. This report addresses the INEEL tests, theories, observations, and test results.iii iv FOREWORD

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Measurement and simulation of pressure wave attenuation in upward air–water bubbly flow

Cited by 13 publications

References 32 publications

Backpressure Valve for Subhydrostatic Wells

Backpressure Valve for Subhydrostatic Wells

Behaviors of spherical intruder in 3-D vertically vibrating granular system with vertical longitudinal air pressure wave

Empirical Study Of Tube Wave Suppression For Single Well Seismic Imaging

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