Tecnologia em Metalurgia, Materiais e Mineração (Oct 2013)

INFLUENCE OF THERMAL AGING IN DIFFERENTIAL STICKING PROPERTIES OF THE DRILLING FLUIDS WITH CLAY

  • Raquel Santos Leite,
  • Renalle Cristina Alves de Medeiros Nascimento,
  • Luciana Viana Amorim

DOI
https://doi.org/10.4322/tmm.2013.034
Journal volume & issue
Vol. 10, no. 3
pp. 239 – 248

Abstract

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This work has the aim to evaluate the influence of thermal aging and filtration properties in the differential sticking of the clay fluids. Clay fluids with dispersant additives tested at room temperature and after thermal aging are studied. Drilling fluids were submitted to thermal aging for 16 hours in a Roller Oven at 93,3°C (200°F). Fluid loss (FL) and the differential sticking coefficient (DSC) in a Fann differential sticking tester under a pressure of 477.5 psi are determined. The cake thickness (CT) is determined by an extensometer. It is concluded according to the results obtained that the thermal aging has significant influence in fluid losses and in the cake thickness of the studied fluids. Moreover, it is shown that the risk of arrest by differential pressure fluid is not influenced by thermal aging at 93.3°C.

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