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Drilling Riser – Offshore Drilling

ReflowX SKU: REF-3363

Product Details

Quantity

5000
Availability (Lead Time)

10-16 Weeks
Product Location

China
Condition

New
OEM

Octal Steel Co., Ltd.
Equipment code

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Short Description

Drilling risers with 21″–21½″ internal diameter, supplied for deepwater and ultra-deepwater offshore drilling operations, connecting subsea wellheads and BOPs to surface rigs.

Description

Product Description

Drilling risers are temporary offshore tubular systems used to connect the subsea wellhead and blowout preventer (BOP) to the surface drilling unit. They provide a controlled return path for drilling fluids and cuttings while enabling pressure control and well integrity during drilling operations.

Risers are designed to operate in dynamic offshore environments and are supplied with interfaces and features compatible with deepwater drilling systems, including auxiliary lines and motion-compensation equipment.

Technical Specifications

General Specifications

Parameter	Details
Product Type	Drilling Riser
Application	Offshore Deepwater & Ultra-Deepwater Drilling
Function	Temporary fluid return and pressure-control conduit
Installation Role	Connects subsea wellhead / BOP to surface rig
Service Environment	Offshore / Marine
Reusability	Retrievable and reusable

Dimensional Range

Parameter	Details
Internal Diameter (ID)	21″ – 21½″
Length Configuration	Jointed sections (project-specific)
Dimensional Control	ID, straightness, alignment per agreed specification

System Configuration

Component	Availability
Riser Joints	Standard drilling riser joints
Tension Joints	Available
Flex Joints	Available
Buoyancy Modules	Available
Auxiliary Lines	Choke & kill line integration (as specified)

Materials & Protection

Parameter	Details
Material Type	High-strength low-alloy steel
Corrosion Protection	Marine-grade coatings
Seawater Exposure	Designed for full immersion

Quality & Inspection

Inspection Scope	Availability
Non-Destructive Testing (NDT)	UT / RT / MT (as specified)
Hydrostatic Testing	Available
Fatigue & Corrosion Testing	Available (when specified)
Documentation	MTC, inspection & test records
Traceability	Joint-level traceability maintained

Typical Applications

Application	Purpose
Deepwater Drilling	Fluid circulation and well control
Ultra-Deepwater Projects	Connection between subsea BOP and surface rig
Floating Rigs	Motion-compensated drilling operations
HPHT Wells	Pressure-controlled drilling environments

If you require any further information on this listing please contact info@reflowx.com

Technical Details

Year of Manufacturing	2026
Manufacturer Name	OCTAL Steel

General Terms

ReflowX and the seller retain the right to evaluate and approve offers.
Buyers should verify quantities and conditions upon delivery.
After successful engagement, both buyer and seller manage communication for payment terms and delivery schedule.
All parties agree to adhere to ReflowX Terms and Conditions in transactions.
Buyers can request value-added services such as pre-purchase inspections, Expediting & Delivery Services through ReflowX. Contact us!