Circulating tool for assisting in upward expulsion of debris during drilling
Abstract:
Disclosed is a circulating tool for aiding in removing debris from near the drill bit when drilling, especially for coiled tubing drilling operations. The drilling fluid entering the tool is directed to a sleeve which can spin freely around the tool, and includes upwardly directed ejection ports and tangentially oriented tangential ports. Fluid ejected from the tangential ports induce the sleeve to spin about the tool, and thus, fluid ejected from the ejection ports is spun to create a drilling fluid vortex within the well bore—and assist in carrying debris up and out.
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