• A Novel Solid Lubricant Uses the Principles of Tribology to Reduce the Coefficient of Friction COF in Oil-Based Muds OBM for Extended Reach Drilling Applications (in Spanish)

    This presentation in Spanish (slides in English) is from the 2020 SPE Latin American and Caribbean Petroleum Engineering Conference. Our archived 2020-21 event content is now available free to SPE members!

    • Paper Number: SPE-199033-MS
    • Published: 20 July 2020
    • Authors: Mario A Ramirez; Ryan Pritchard

    Extended reach horizontal wells face significant challenges in drilling longer laterals with oil-base mud (OBM). A novel solid-state lubricant was developed to close the gap in limitations of liquid lubricants and OBM with respect to lubricity in long extended lateral sections. The novel solid lubricant reduces the surface contact area between the asperities (deformations) by rolling and provides a chemically bonded film on the contact areas to reduce the amount of shear stress between the surfaces.

    There is limited understanding of the complex mechanisms affecting the coefficient of friction (COF). The principles of Tribology were used to develop the solid-state lubricant. The Stribeck Curve describes the regimes while using a lubricant, including boundaries mixing elasto-hydrodynamic and hydrodynamic lubrication. Liquid lubricants are limited at controlling boundary conditions where the COF is ruled by asperities in contact between the surfaces. The novel solid-state lubricant works on the asperities of both the wellbore and bit/BHA. In addition, the COF is improved in the mixed and elasto-hydrodynamic lubrication regimes.

    Tags: , , , ,

  • A Novel Solid Lubricant Uses the Principles of Tribology to Reduce the Coefficient of Friction COF in Oil-Based Muds OBM for Extended Reach Drilling Applications (in Spanish)