Drilling Derricks & Masts

At Allrig, we take pride in our API 4F accreditation, a testament to our commitment to delivering industry-leading derrick and mast solutions that meet the highest safety, durability, and performance standards. With decades of experience in the oil & gas, offshore, and energy sectors, we specialize in providing customized and comprehensive solutions for drilling derricks and masts. Our team of highly skilled engineers, fabricators, builders, and inspectors ensures that every project is executed with precision, efficiency, and adherence to global industry regulations. Whether it's new builds, structural maintenance, recertification, or decommissioning, we bring expertise, innovation, and a commitment to quality to every project we undertake.

Our comprehensive asset management approach ensures that your drilling equipment, pipe handling systems, and lifting gear are maintained to API, ABS, and DNVGL standards. From rig audits, rope access inspections, and non-destructive testing (NDT) services to derrick bolt replacements and load testing, Allrig provides an end-to-end solution tailored to your specific operational needs.

Comprehensive Derrick & Mast Services

Allrig provides a full suite of services throughout the lifecycle of derricks and masts, ensuring structural integrity, compliance, and operational efficiency.

Derrick & Mast Fabrication, Assembly & Decommissioning

We specialize in the design, manufacturing, and installation of derricks and masts for offshore and onshore drilling operations. Our services include:

• Fabrication of all types of derrick and mast structures in compliance with API 4F standards.
• Assembly, erection, installation, and outfitting of new and refurbished drilling structures.
• Comprehensive maintenance, repairs, and recertification to extend equipment lifespan.
• Installation and removal of all derrick and mast components, including bolted connections and platform integration.
• Derrick bolt services ensuring structural integrity and secure connections.
• Efficient decommissioning of obsolete drilling structures using the Floating Pole system or platform cranage.

Custom Design & Fabrication Solutions

Our in-house engineering team designs and fabricates a range of structural components to enhance drilling efficiency:

• Racking Boards (Fingerboards) – Custom-built for optimal pipe storage and handling.
• Casing Stabbing Boards – Designed for safe and precise casing operations.
• Belly Boards & Water Tables – Engineered for stability and durability in extreme conditions.
• Structural Members & Reinforcements – Ensuring strength and compliance with industry regulations.

Inspection & Condition Assessments

Regular inspections and structural assessments are critical to maintaining the safety, reliability, and performance of derrick and mast structures. Allrig offers comprehensive API-compliant inspection services, including:

• API RP 4G CAT III Inspections – Thorough assessments with fully compliant reports.
• API RP 4G CAT IV Inspections – In-depth structural inspections with advanced non-destructive testing (NDT).
• Dropped Object Surveys (DROPS) – Identifying and mitigating potential hazards.
• Primary & Secondary Retention Systems – Supply and installation to prevent failures.
• Structural Condition Assessments & Fault Rectifications – Addressing deficiencies and ensuring compliance.
• Derrick & Mast Audits – Full structural evaluations to meet industry standards.
• Reverse Engineering Services – Custom solutions for legacy or modified structures.

Precision Theodolite Surveys

Accurate alignment and deviation measurements ensure optimal performance and compliance:

• Derrick & Mast Vertical Alignment – Precision measurements to ensure well-centered structures.
• Cantilever Deviation Checks – Assessing potential misalignments affecting drilling operations.
• Guide Rail Alignment Surveys – Ensuring smooth movement and operational safety.

Why Choose Allrig for Your Derrick & Mast Needs?

With decades of experience, cutting-edge technology, and global expertise, Allrig is the trusted partner for drilling contractors, rig owners, and energy companies. We provide:

• Industry-Leading API 4F Certified Solutions – Meeting the highest safety and performance standards.
• Full Lifecycle Support – From design and fabrication to inspection, maintenance, and decommissioning.
• Global Reach, Local Expertise – Delivering efficient solutions with minimal downtime.
• Innovative Engineering & Fabrication – Customized components for optimized drilling operations.
• Commitment to Safety & Compliance – Ensuring all projects meet regulatory requirements.

Would you like to know more? 

If you are interested in understanding more about Allrig’s Derrick and Mast related services, it would be great to tell you more about how we could support you, so please contact the nearest Allrig location, or send an email to sales@allriggroup.com