JACKUP RIG AND LENGTH ADJUST METHOD FOR LEG OF JACKUP RIG

摘要

The present invention relates to a jack-up rig and a length adjustment method for a leg of the jack-up rig, reducing local stress and raising the safety level. According to the present invention, the jack-up rig comprises: a rack and a pinion devices installed in the jack-up rig, an inner leg member that can be moved up and down, and an outer leg member that can be moved up and down, being superposed with the inner leg member at the top.