... -mounted Drilling Rig:Derrick divided into A, K, (open type), tower type, such as masts and packaged-type. · A thigh-derrick with rectangular or ... rely on the power winch from the overall release. K-derrick main "K"-type section, thigh patch truss structure, the use of the ... ≤8.3≤8.3≤8.3Weight kg12198923990112471437213800048000Note: AA-KK-KS-K-type telescopic tower-type T-W-mast-Z ...