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ALLIS-CHALMERS RENTAL SERVICES LLC

ALLIS-CHALMERS RENTAL SERVICES LLC Patent applications
Patent application numberTitlePublished
20110209877APPARATUS FOR, AND METHOD OF, LANDING ITEMS AT A WELL LOCATION - An apparatus for, and method of, lowering items from a drilling rig to a well located below it through the use of a landing string comprised of drill pipe having an enlarged diameter section with a shoulder, in combination with upper and lower holders having wedge members with shoulders that engage and support the drill pipe at the shoulder of the enlarged diameter section, the shoulder of the drill pipe and the shoulders of the wedge members being rotatable with respect to each other.09-01-2011