Capturing Stick-Slip in the Lab Using Hardware-in-the-Loop

摘要

Stick-slip is a torsional vibration mode observed in drilling systems, which are used in creating boreholesfor the exploration and production of oil and natural gas. This paper presents a method to create and assessstick-slip in the laboratory environment. This is achieved by using the hardware-in-the-loop method, wherea numerical drillstring model is combined with an experimental drilling machine. In this setup, the numericalmodel captures the axial and torsional oscillations between the surface and the drill bit, while the drillingmachine acts as the hardware in the loop, capturing the actual bit-rock interaction. The proposed frameworkallows creating self-excited stick-slip oscillations in a controlled, repeatable and measurable manner. Thisenables reducing the risk, cost, and time for activities related to testing, developing, debugging or optimizingany stick-slip related tool or mitigation concept.