ELEVATOR FOR GRIPPING AND LIFTING A RISER JOINT

摘要

An elevator for gripping and lifting a riser joint or several inter¬ connected riser joints of a completion and work over riser. The elevator (10) comprises a body (1 1 ) provided with a through bore (12) for receiving a production pipe of a riser joint, the through bore being accessible via a longitudinal opening (13) in the body. The body is provided with at least one locking device (30) in the form of a hydraulic cylinder, the piston rod (32) of which being moveable to and fro between an unlocking position, in which the piston rod (32) allows a production pipe of a riser joint to pass into or out of the through bore via the longitudinal opening, and a locking position, in which the piston rod prevents a production pipe received in the through bore from passing out of the through bore via the longitudinal opening.