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Evaluation of drilling fluids flow regime in annular sections; Avaliacao do regime de escoamento de fluidos de perfuracao em secoes anulares

Abstract

The determination of the transition zone between the laminar and turbulent flow regimes of particular importance in optimizing the hydraulics of drilling operations. The principal advantage which laminar flow in the annular space has in drilling operations in the avoidance of wall enlargement (wash-outs), maintaining formation integrity as much as possible. On the other hand, a lower-energy regime such as laminar flow does not provide the same cuttings-carrying capacity as that obtained when the drilling fluid is in turbulent flow. However, to be able to optimize the hydraulics it is necessary to have determined, among other parameters, the transition zone, in order to maximize the drilling rate while obtaining the hole clear of cuttings and maintaining the hole diameter constant over the whole of the section drilled. This paper presents, based on experimental results obtained on the SHS physical simulator, the transition zone expressed through the critical Reynolds numbers and those for low stable turbulence of various drilling fluids tested over the temperature range of 25-80 deg C. (author) 20 refs., 7 figs., 4 tabs.
Authors:
Silva, Maria das Gracas Pena [1] 
  1. PETROBRAS, Rio de Janeiro (Brazil). Centro de Pesquisas. Setor de Tecnologia de Perfuracao
Publication Date:
Dec 31, 1989
Product Type:
Conference
Report Number:
ETDE-BR-0091; CONF-890029-
Reference Number:
SCA: 040300; PA: BR-99:0H0167; SN: 99002141730
Resource Relation:
Conference: 3. seminar on drilling fluids, 3. Seminario de fluidos de perfuracao, Rio de Janeiro (Brazil), 1989; Other Information: PBD: 1989
Subject:
04 OIL SHALES AND TAR SANDS; ENERGY; PETROLEUM; PETROLEUM INDUSTRY; DRILLING; DRILLING FLUIDS; OIL FIELDS; OIL WELLS; FLUID FLOW; LAMINAR FLOW; TURBULENT FLOW
OSTI ID:
700857
Research Organizations:
PETROBRAS, Rio de Janeiro (Brazil). Centro de Pesquisas e Desenvolvimento Leopoldo A. Miguez de Mello
Country of Origin:
Brazil
Language:
Portuguese
Other Identifying Numbers:
Other: ON: DE99763679; TRN: BR99H0167
Availability:
OSTI as DE99763679
Submitting Site:
BR
Size:
9 p.
Announcement Date:

Citation Formats

Silva, Maria das Gracas Pena. Evaluation of drilling fluids flow regime in annular sections; Avaliacao do regime de escoamento de fluidos de perfuracao em secoes anulares. Brazil: N. p., 1989. Web.
Silva, Maria das Gracas Pena. Evaluation of drilling fluids flow regime in annular sections; Avaliacao do regime de escoamento de fluidos de perfuracao em secoes anulares. Brazil.
Silva, Maria das Gracas Pena. 1989. "Evaluation of drilling fluids flow regime in annular sections; Avaliacao do regime de escoamento de fluidos de perfuracao em secoes anulares." Brazil.
@misc{etde_700857,
title = {Evaluation of drilling fluids flow regime in annular sections; Avaliacao do regime de escoamento de fluidos de perfuracao em secoes anulares}
author = {Silva, Maria das Gracas Pena}
abstractNote = {The determination of the transition zone between the laminar and turbulent flow regimes of particular importance in optimizing the hydraulics of drilling operations. The principal advantage which laminar flow in the annular space has in drilling operations in the avoidance of wall enlargement (wash-outs), maintaining formation integrity as much as possible. On the other hand, a lower-energy regime such as laminar flow does not provide the same cuttings-carrying capacity as that obtained when the drilling fluid is in turbulent flow. However, to be able to optimize the hydraulics it is necessary to have determined, among other parameters, the transition zone, in order to maximize the drilling rate while obtaining the hole clear of cuttings and maintaining the hole diameter constant over the whole of the section drilled. This paper presents, based on experimental results obtained on the SHS physical simulator, the transition zone expressed through the critical Reynolds numbers and those for low stable turbulence of various drilling fluids tested over the temperature range of 25-80 deg C. (author) 20 refs., 7 figs., 4 tabs.}
place = {Brazil}
year = {1989}
month = {Dec}
}