A new coiled tubing (CT) failure mechanism has appeared in the past two to three years. The failures occur in CT strings used for frac plug milling in extend reach horizontal wells. The objective of this paper is to investigate a possible cause for these failures. The primary emphasis is analyzing the dynamic response of the CT to axial vibrations induced by a downhole extended reach tool [1], and the resulting tubing material response leading to failure.

Keywords:
drilling operation, displacement, natural frequency, coiled tubing vibration, coiled tubing operations, injector, vibrate, amplitude, ert frequency, magnitude
Subjects:
Drilling Operations, Completion Installation and Operations, Coiled tubing operations
Copyright 2021, Society of Petroleum Engineers
You can access this article if you purchase or spend a download.