دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: an immobile offshore structure from which development wells are drilled and produced. Platform rigs may be built of steel or concrete and may be rigid or compliant. Rigid platform rigs, which rest on the seafloor, are the caisson- type platform, the concrete gravity platform, and the steeljacket platform. Compliant platform rigs, which are used in deeper waters and yield to water and wind movements, are the guyedtower plat- form, the tension-leg platform, and the compliant piled tower platform.