Effects of tribological properties of water-based drilling fluids on buckling and lock-up length of coiled tubing in drilling operations

J. Abdo, A. Al-Shabibi, H. Al-Sharji

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

This study evaluates the performance of three lubricants on reducing friction between wellbore and coiled tubing (CT) and hence improving axial force transfer, reducing buckling, and enhances the limited reach of CT. The lubricants were evaluated using water-based drilling fluids composed of lubricants of different concentrations. Experiments were conducted in a lubricity tester and by using an in-house experimental setup that imitates the wellbore being drilled in the presence of drilling fluids. Results showed that reducing COF does not change CT buckling shape or mode, but it alters the initiation and transition between buckling modes and increases lock-up length. Effects of increasing lubricants percentages on mud properties were also examined. They showed positive impact compared to tests conducted without lubricants.

Original languageEnglish
Pages (from-to)493-503
Number of pages11
JournalTribology International
Volume82
Issue numberPB
DOIs
Publication statusPublished - 2015

Fingerprint

Coiled tubing
Drilling fluids
lubricants
buckling
drilling
Buckling
Lubricants
Drilling
Water
fluids
water
mud
test equipment
friction
Friction
Experiments

Keywords

  • Coiled tubing buckling and lock-up conditions
  • Lubricants
  • Lubricity index
  • Water-based drilling fluids

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

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AB - This study evaluates the performance of three lubricants on reducing friction between wellbore and coiled tubing (CT) and hence improving axial force transfer, reducing buckling, and enhances the limited reach of CT. The lubricants were evaluated using water-based drilling fluids composed of lubricants of different concentrations. Experiments were conducted in a lubricity tester and by using an in-house experimental setup that imitates the wellbore being drilled in the presence of drilling fluids. Results showed that reducing COF does not change CT buckling shape or mode, but it alters the initiation and transition between buckling modes and increases lock-up length. Effects of increasing lubricants percentages on mud properties were also examined. They showed positive impact compared to tests conducted without lubricants.

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