Home > Products > Drilling Products > Drilling Equipment > Substructures

 Box-on-Box, Slingshot and Swing-lift Type Substructures (API 4F)

We supply box-on-box, slingshot and swing-lift type substructures (API 4F) with load capacity 500,000, 750,000, 1,000,000 and 1,500,000 lbs. Slingshot and swing-lift are self-elevating substructures. Slingshot is one of the most popular substructures in the industry.