Alcoa Oil and Gas Riser Components Brochure
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Transcript of Alcoa Oil and Gas Riser Components Brochure
Lightweight, high-strength riser systems, designed to take you deeper.
ven as offshore drilling operations go deeper, the depth capacity of jack-up rigs, semisubmersible rigs, and
drillships is often limited by the additional weight of longer riser strings. This reality has, at times, been a
limiting factor in the utilization of a wide range of offshore drilling vessels.
Lightweight, high strength aluminum alloy riser components and assemblies from Alcoa Oil and Gas help operators
meet the demands of deepwater drilling by reducing the weight of a riser system by as much as 60% and extending
drilling depths up to 40%. The unmatched strength-to-weight ratio of these riser systems ultimately results in
increased depth capacity, without sacrificing performance or safety.
For upgrading an existing rig for greater water depths, Alcoa aluminum alloy components are unmatched.
Equipment and maintenance costs can be significantly less expensive with an aluminum riser system, as compared
to a similar upgrade utilizing a steel riser system. In addition, the lighter weight of these aluminum subsea risers
makes them easier to deploy, handle, store, and clean.
Alcoa aluminum alloy riser system components
and assemblies are offered in virtually any size and
configuration to match with existing subsea drilling riser
designs, for either upgrade or new-build applications.
Critical components offered by Alcoa include:
• Industry-leadingextrudedaluminumalloytubing
up to 60’ in length and 30” in diameter
• High-pressurealuminumalloychokeandkilllines,
formed with unique, heavy and taper wall geometries
to maximize strength while minimizing weight
• Complexextrudedshapesforhighstrength-to-weight
structural components
High-performancecomponentsandassemblies, designed to reduce weight without sacrificing performance.
The new BOP factor: risers need to be lighter than ever.
Today’s offshore industry is in the process of
developing a new generation of BOP designs
built to deliver even greater shear power.
These BOPs will likely be equipped with an
additional ram stack to provide this higher level
of shearing force. The addition of another ram
stack will increase the weight of the BOP and
correspondingly, the load on the rig as it is
deployed by the riser string.
In order to compensate for the increased
weight of the BOP, many operators are now
considering the use of aluminum risers instead
of the heavier steel designs. Alcoa Oil and Gas is
poised to meet the growing demand for strong,
lightweight riser systems by providing proven
aluminum components and assemblies which
combine advanced materials and designs.
Design Variable Deepwater - Values Ultra Deepwater - Values
Main Tube & Flange Alloy 1980-T1 (Low CU; AL-ZN) 1953-T1 (Low CU; AL-ZN)
Weld Thickness (in.) 1.280 1.300
Weld Yield (ksi) 29 48
Allowable Stress (ksi) 19.343 32.016
Corrosion-Wear Allowance 0.100 0.100
Riser Tensile Capacity (T) 1,505,898 lbs (6,698,098 N) 2,265,240 lbs (10,076,289 N)
Riser Pipe Bending Capacity (B) 661,067 Ft-lbs (896,220 N-m) 1,110,998 Ft-lbs (1,506,295 N-m)
Riser Design Pressure 1,717 psi (11.8 MPa) 3,868 psi (26.7 MPa)
Choke and Kill (C&K) Design Pressure 15,000 psi (103.4 MPa) 15,000 psi (103.4 MPa)
Booster Design Pressure 5,000 psi (34.5 MPa) 7,500 psi (51.7 MPa)
Hydraulic Design Pressure 5,000 psi (34.5 MPa) 5,000 psi (34.5 MPa)
Minimum Design Temperature -4ºF (-20ºC) -4ºF (-20ºC)
Maximum Design Temperature 248ºF (120ºC) 140ºF (60ºC)
UDW Connector Rating1.5 million pounds [in accordance
with API Specification 16R, section 4.1.2]
2.5 million pounds [in accordance with API Specification
16R, section 4.1.2]
Riser Weight Air (lbs) 17,000 16,800
Riser Weight Wet (lbs) 11,200 11,088
Easily retrofit choke and kill lines to your existing riser system.
Whether retrofitted to an existing riser string or part
of a new riser system, Alcoa Oil and Gas aluminum
alloy choke and kill lines offer a number of key benefits:
high strength, light weight, and corrosion-resistance.
In addition to reducing overall riser weight and extending
drilling depths, aluminum choke and kill lines offer
many distinct advantages:
• Enableseasierdeployment,storage,andcleaning
of risers
• Allowsforreuseofexistingbuoyancymaterials,
with little or no modification needed
• Providesforareductioninbuoyancymaterials,
resulting in reduced initial investment and long-term
maintenance costs
• Involvesonlyminimalimpactontherigitselfandvery
little downtime, as only choke and kill lines are replaced
• Easilyretrofittedduringroutinemaintenancecycles
The Alcoa Connection.Alcoa Oil and Gas, a division of Alcoa, produces lightweight, high-strength aluminum alloy drill pipe
in 4-1/2", 5", 5-1/2", 5-7/8", and 6-5/8" diameters. In addition, Alcoa Oil and Gas manufactures subsea
riser components and assemblies, casing, core barrels and downhole tubular products, conveying pipe,
extruded tubing and shapes, and offers large-scale, closed-die forging capabilities.
Alcoa is the world’s leading producer of primary and fabricated aluminum, as well as the world’s
largest miner of bauxite and refiner of alumina. In addition to inventing the aluminum industry,
Alcoa innovation has been behind major milestones in the aerospace, automotive, packaging,
building and construction, commercial transportation, consumer electronics and industrial markets
over the past 120 years.
Evidence of this innovative mindset lives within the Alcoa Technical Center, the world’s largest light
metals lab. Here, Alcoa Oil and Gas can access the talents of some of the industry’s leading scientists
and researchers and offer its clients a full range of solutions from concept to completion.
Go Farther.™
25025 IH-45 North Suite 575 The Woodlands, Texas 77380 Direct: 1-281-292-6172 Toll-free: 1-888-379-1455 AlcoaOilandGas.com
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