Composite high torsional stiffness, strength and light weight properties are particularly applicable in extended reach drilling. Composite drill pipes can be designed to provide improved resistance to buckling and a reduction of friction and drag while saving 50% of the weight. The horizontal distance can be easily increased 40% from 25,000 to 35,000 feet over the conventional steel drill pipe. In offshore E&P operations, more oil and gas reserves can be reached from a single drill platform. Thus, substantial saving can be realized from fewer, smaller and lighter structures. This is extremely important in deepwater operations, where the platform weight is a major design consideration, additionally, this extended reach capability allows many reservoirs to be tapped from existing structures, which probably will not be developed otherwise. Additionally, real time monitoring of logging while drilling (LWD) and measurement while drilling (MWD) is limited by the rate of transmission of signals to the surface. Current technology utilizing pressure pulses in the mud stream is limited to about 10 pulses per second. Replacing the electrically conductive drill string with one having low conductance, such as a composite drill pipe, would permit deployment of electromagnetic transmission systems and could potentially increase the transmission rate by several orders of magnitude.

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