Derrick/Mast Component for Drilling Rigs | Specifications & Verification

Product Specifications

Technical details and manufacturing context for Derrick/Mast

Definition

The derrick or mast is the tall, vertical structural component of a rotary drilling rig that serves as the primary support for the hoisting system, crown block, traveling block, and drill string. It provides the necessary height for tripping drill pipe, running casing, and handling other tubulars during drilling operations. Derricks are typically fixed structures with four legs, while masts are portable structures that can be raised and lowered for transportation. Constructed from high-strength structural steel, the derrick/mast is designed to withstand significant loads and environmental conditions. Key parameters include a rated load capacity of 100–500 kN, a height of 20–60 m, a base width of 5–12 m, and a working temperature range of -40 to 85 °C. It can resist wind loads up to 45–55 m/s, and its material grade typically ranges from Q345 to Q460 per GB/T 1591. The total structural weight is between 50 and 200 tons, with corrosion protection per ISO 12944 (C4–C5). The maximum racking capacity is 200–500 m of drill pipe, and the mast can be tilted up to 5 degrees for adjustment. These values are reference ranges and must be verified for the specific model and application. The derrick/mast is designed and tested according to API 4F, but compliance must be confirmed with the manufacturer. It is a critical component that ensures safe and efficient drilling operations, and its structural integrity is paramount.

Working Principle

The derrick/mast functions as a stationary load-bearing structure that transfers the weight of the drill string, casing, and hoisting equipment to the rig's substructure and foundation. It provides the vertical clearance needed to handle stands of drill pipe (typically 90 ft/27 m or longer) during tripping operations. The crown block mounted at the top guides the drilling line, while the structure must withstand dynamic loads from hoisting, wind forces, and potential side loads. The design must account for fatigue, buckling, and stability under various operating conditions.

Common Materials

High-strength structural steel, Alloy steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Load Capacity	100–500 kN	Maximum hook load capacityAPI 4F
Height	20–60 m	Clear height for drilling operations
Base Width	5–12 m	Footprint for stability
Working Temperature	-40–85 °C	Structural integrity limits
Wind Load Resistance	45–55 m/s	Maximum wind speed for operationAPI 4F
Material Grade	Q345–Q460	High-strength structural steelGB/T 1591
Weight	50–200 t	Total structural weight
Corrosion Protection	C4–C5	Coating system for offshore/onshoreISO 12944
Max Racking Capacity	200–500 m	Total drill pipe length stored
Tilt Angle	0–5 °	For mast adjustment

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Legs Part
Primary vertical load-bearing members that transfer loads to substructure

Material: High-strength steel
Bracing Part
Diagonal and horizontal members that provide structural stability and resist lateral forces

Material: Structural steel
Crown Block Support Part
Structure at the top that supports the crown block assembly

Material: Alloy steel
Monkey Board Part
Platform for derrickhand to stand on while handling drill pipe during tripping

Material: Steel grating
V-Door Part
Opening in the derrick for bringing in drill pipe and other equipment

Material: Structural steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Rotary Drilling Rig

View system integration details

Oil Drilling Rig

View system integration details

Manufacturers of Derrick/Mast

Manufacturer profiles associated with Derrick/Mast.

Sourcing Derrick/Mast from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 6 September 2026

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the primary function of a derrick/mast?

The derrick/mast provides vertical support for the hoisting system and the drill string, enabling tripping and casing operations. It transfers loads to the rig substructure.

What standards apply to derrick/mast design?

API 4F is commonly referenced for design and testing. However, compliance must be verified with the manufacturer for the specific model.

What are typical load capacities?

Rated load capacity ranges from 100 to 500 kN, but the exact value depends on the model and must be confirmed with the supplier.

How is corrosion protection specified?

Corrosion protection is typically specified per ISO 12944 with categories C4 to C5, but the actual coating system should be verified for the intended environment.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Derrick/Mast

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	Not applicable (structural component, not pressure vessel)
wind load:	Up to 150 mph (design dependent, critical for stability)
temperature:	-40°C to +50°C (operational range, varies by material grade)
dynamic load:	Varies by hoisting capacity (typically 50-1000+ tons)
height range:	10-200+ meters (modular design)

Derrick/Mast

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards