PROPER BIT SELECTION IMPROVES ROP IN COILED TUBING DRILLING

William W. King Security Division, Dresser Industries Inc. Houston Using the correct type of bit can improve the rate of penetration (ROP) and therefore the economics of coiled tubing drilling operations. Key factors, based on studies of the coiled tubing jobs to date, are that the drilling system must be analyzed as a whole system and that both the drill bit type and the formation compressive strength are critical components in this analysis.

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