flotation capsule system and method for pulling a pull top tube

摘要

flotation capsule system and: method for pulling an upward pull tube at the top. a tubular buoyancy capsule system for pulling an upward pull tube at the top. In some embodiments, the system includes a tubular capsule coupled to the top pull up tube, and a pressurized gas system configured to selectively inject pressurized gas into the tubular capsule. the tubular capsule includes an enclosed upper end having at least one closable opening therethrough, an open lower end configured to allow seawater to flow freely into and out of the tubular capsule, and an inner surface extending therethrough. . the inner surface is devoid of structural obstructions that inhibit the free flow of seawater through the lower extremity. When the opening is opened, the tubular capsule is ballasted with seawater. When the opening is closed and pressurized gas is injected into the tubular capsule, the tubular capsule is dewatered from seawater.