Construction
Derrick services, heavy-lift operations & offshore construction, from platform maintenance to full installations.

DSL is the group's construction business. It designs, fabricates, refurbishes and installs drilling derricks, masts and substructures for offshore and onshore rigs.
Fabrication runs from a purpose-built facility in Great Yarmouth with in-house welding, machining and coating, supported by structural analysis (FEA) and heavy-lift engineering. Experienced rig building and derrick assembly crews deploy worldwide for new builds, upgrades and life extension programmes.
Offshore, DSL delivers brownfield modifications, module installation, derrick and CMC removal and full platform decommissioning.
What DSL offers
- Drilling DerricksComplete drilling derrick solutions designed and manufactured for offshore and onshore operations worldwide.(opens in a new tab)
- Masts & SubstructuresHeavy-duty masts and substructure systems engineered for drilling rigs of all sizes.(opens in a new tab)
- Desert Rig MastsPurpose-designed masts for desert drilling operations with enhanced environmental protection.(opens in a new tab)
- Workover MastsCompact workover masts for well intervention and maintenance operations.(opens in a new tab)
- Replacement MastsDrop-in replacement masts to upgrade or replace existing drilling rig masts.(opens in a new tab)
- Casing Stabbing BoardsSafe and efficient casing handling equipment for drilling operations.(opens in a new tab)
- Racking Board AssembliesPipe racking solutions for efficient tubular handling and storage.(opens in a new tab)
- Derrick ComponentsIndividual derrick components including legs, girts, braces, and connection hardware.(opens in a new tab)
- Derrick BoltsHigh-strength structural bolts manufactured specifically for derrick and mast connections.(opens in a new tab)
Ready to work with DSL?
Services, case studies, accreditations and contacts are on the DSL website.