Our Products
Masts & Substructures
Heavy-duty masts and substructure systems engineered for drilling rigs of all sizes.

Heavy-duty masts and substructure systems engineered for drilling rigs of all sizes.
DSL designs and manufactures a variety of mast and substructure configurations — standard cantilever, box-on-box, trailer rig or any other configuration that suits your requirements — with whatever capacity or combination of loadings you need, from 500 through to 3000 HP rigs.
Location most often governs the rig design, so we offer a range of designs to suit yours, be it a fast-moving desert rig, a standard land rig or a winterised rig for extreme cold climates. Rig moving and skidding systems, zero discharge, pipe handling and other features can all be incorporated.
Whether you need a replacement mast and substructure for an existing rig or are building a new one, we can also undertake any interface engineering required for your rig and its equipment.
Key Features
- Telescoping designs
- Hydraulic raising systems
- Heavy-duty substructures
- Rotary table support
- BOP handling capability
- Modular construction
Related Products

Drilling Derricks
Complete drilling derrick solutions designed and manufactured for offshore and onshore operations worldwide.

Desert Rig Masts
Purpose-designed masts for desert drilling operations with enhanced environmental protection.

Workover Masts
Compact workover masts for well intervention and maintenance operations.
Need a Custom Solution?
Our engineering team can design and manufacture equipment to your exact specifications.