Abstract
Aqueous drilling muds, while recognized as environmentally benign, are known to give higher friction coefficients than their oil-based counterparts, leading to increased torque and drag on the drillstring. In addition, they are more prone to differential sticking. Tests have been run on a 1/4 scale simulation rig using both polymer and clay-water based muds at temperatures up to 80°C, and differential pressures up to 100 psi, to study the effect of cathodic electric currents on friction and stuck pipe release. Imposing a current halved friction and reduced the release torque by up to 80% within two minutes. In practice, it may be possible to impose such currents via a downhole generator, by the use of sacrificial anodes, or by adding chemical reductants to the mud.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
