Drilling system combines composite-coiled tubing, hydraulic-workover unit

Based on a presentation to the International Association of Drilling Contractors and Society of Petroleum Engineers drilling conference, Dallas, Feb. 26-28, 2002.The petroleum industry, historically, has drilled wells with steel pipe. Technology advances, however, have enabled engineers to design, build, and introduce a hybrid-drilling system that combines composite coiled-tubing technology with a hydraulic-workover unit.By using composite pipe with embedded conductors, the system achieves uninterrupted real-time, two-way communication with the downhole tools, allowing a step-change improvement in the knowl edge of dynamic-wellbore conditions and in control over downhole systems.Incorpora...

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