Once the decision is made to complete a well in order to begin producing, the operator wants to complete the task as soon as possible. One completion task is to drill through multiple completion plugs so the pay zones can begin producing. In the past, drilling these plugs has gone slower than desirable due to static friction build-up between the coiled tubing string and the hole wall. In addition, slower plug drilling results as the drill bit dulls after drilling several plugs. This paper introduces a friction breaking tool/drill bit combination that has shown to lessen plug drilling time by almost double what was previously possible. The friction physics between hole wall and coiled tubing will be presented in the initial portion of this paper. Then, the simple designs of the friction breaking tool and the drill bit will complete the design portion of the paper. Finally, a Case Study is provided to show the results of running these tools. The Case Study took place in Tarrant County, Texas while drilling out composite completion plugs to complete four wells.
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