Allrig caters for all your drilling derrick and drilling mast requirements. Think of fabrication of drilling
structures according to API 4F standards, as well as the assembly, erection, installation & outfitting of new
Experience and expertise
We employ many of the industry’s expert design engineers, fabricators and derrick builders who can
undertake any job. This includes the maintenance, removal, inspection, repair and recertification of
equipment – from crown assemblies, to top drive systems and traveling blocks.
Multi-derrick new build project
One of our latest projects on behalf of Lamprell Energy ltd: the ENSCO 140 new build derrick, "has been a very exciting, large scale project where we could truly prove our derrick service capabilities and expertise”, according to Allrig’s Global Project Director.
Specialized derrick services
We offer a number of specialized derrick services, including:
- API RP 4G CAT III and CAT IV inspections
- Dropped object surveys
- Decommissioning of redundant drilling structures using the 'Floating Pole' system or platform cranage
Design and fabrication of:
- Racking boards (fingerboards)
- Casing stabbing boards
- Belly boards
- Water tables
- Theodolite alignment
- surveys covering:
- Drilling derrick vertically aligning center of crown to center of well
- Cantilever deviation
- Guide rail alignment
Installation & commissioning
Drilling derricks are typically installed in 2-3 sections. However, depending on crane capacity, it is possible to
install an entire derrick in one lift, which has been fully outfitted with all OEM equipment, electrical, mechanical and piping systems. This enables a 'plug and play' fast start-up and commissioning process. Drilling masts come in various forms and can be assembled ('rigged up') and installed rapidly.
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