Standard Subsea Wellheads Oss Wellhead Brochure
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Standard Subsea Wellheads Integrated offshore offering for reliable, high-quality, and capital-efficient performance Standard Subsea Wellheads Through standardized processes, common core components, and qualified, field-proven assemblies, OneSubsea can deliver standard subsea wellheads anywhere in the world within 6 months. These highly configurable solutions are designed to bring greater efficiency and reliability to subsea operations, enabling project viability and helping you meet a range of functionality requirements while driving down capex. Advantages Flexible Functionality Since 1960, OneSubsea has developed a legacy of efficient wellhead delivery, supplying more than 1,000 wellheads around the globe. Our wellheads are engineered with robust, reliable technologies that can be complemented with expert services to maximize capital efficiency and further expedite delivery. The OneSubsea wellhead portfolio covers a broad range of applications. WellAnchor* subsea wellhead systems feature trip-reducing, highcapacity components that are interchangeable for maximized versatility. The DW-5 and DW-5XL models are rated to ■■ 15,000-psi [1,034-bar] pressure ■■ 5,250,000-ft.lbf [7,118,000-N.m] bending force ■■ 10,000-ft [3,048-m] water depth and the DW-5XL model accommodates large bores. The standard wellhead is built from a suite of preauthored quality control, material, and welding specifications that simplify and expedite our execution processes. OneSubsea works with approved vendors to ensure that they can manufacture the required components, enabling high confidence in quality and lead time. Quality Control Materials The QC requirements for the wellheads are in accordance with API Specifications 6A and 17D. Our facilities are certified to API Q1, and our strategic subcontractors are certified to ISO 9001. Surveillance by independent competent bodies facilitates preengineering of materials, which enables preordering and, in certain cases, stocking them to secure lead time and protect schedule. Surveillance by customers is available during factory-acceptance testing. All material specifications used conform to API 6A and API 17D and were chosen on a component-by-component basis. Pressurecontaining components additionally conform to DNV GL recommended practices (RP) for steel forgings for subsea applications (DNVGL-RP-0034). A range of standardized material options is available based on component criticality, manufacturability, and environmental compatibility. Welding Our welding procedure for subsea wellheads conforms to API 6A, API 17D, ASME Section IX, NACE MR0175/ISO 15156, and DNVGL‑RP-C203 fatigue classes F3, D, or C1. Weld options ■■ Automated welding ■■ Weld reinforcement ■■ Automated flush grinding of weld joint† † Fatigue class C1 only 183/4-in WellAnchor Subsea Wellhead System Models DW-5 183/4-in Parallel-Bore Metal-To-Metal (MTM) Seal Assembly DW-5XL Actuating ring MTM Assembly Specifications Pressure rating, psi [bar] Lockdown capacity, lbf [N] Temperature range, degF [degC] Overall height, in [mm] Maximum OD, in [mm] Minimum ID, in [mm] Weight, lbm [kg] Datum Lightweight corrosion cap First-position DW-5 casing hanger 15,000 [1,034] 1,000,000 [4,448,222] 0 to 300 [–18 to 148.9] 12.92 [328.2] 18.59 [472.2] 16.91 [429.5] 135 [61] Housing lock ring Hanger lock ring Retainer wire 183/4-in wellhead housing First-position DW-5XL casing hanger Wear bushing MTM seals MTM seals 183/4-in parallel-bore MTM seal assembly 95/8-in casing hanger Recessed secondary seal area DW-5 or DW-5XL 183/4-in parallel-bore MTM seal assembly DW-5 or DW-5XL 133/8-in casing hanger DW-5XL Wellhead housing OR Casing hanger 36-in conductor housing Flush plug 26-in casing hanger 28-in casing hanger 16-in seal assembly 18-in seal assembly Slope indicator and bracket Bit-Retrievable Wear Bushings Extreme efficiency for deepwater drilling by reducing downhole trips 28-in casing hanger Flow ring 16-in parallel-bore MTM seal assembly Annulus ball valve Flow ring Mudmat 16-in casing hanger 16-in receptacle 36-in casing 16-in casing hanger 28-in casing 18-in casing hanger Second-position bit-retrievable wear bushing First-position bit-retrievable wear bushing 20-in casing Wear sleeve 16-in casing 133/8-in casing 95/8-in casing 16-in receptacle 18-in receptacle Wear sleeve running tool First-position bit-retrievable wear bushing running tool Second-position bit-retrievable wear bushing running tool Standard Subsea Wellheads Integrated offshore offering for reliable, high-quality, and capital-efficient performance onesubsea.slb.com/standardization *Mark of Schlumberger. Other company, product, and service names are the properties of their respective owners. Copyright © 2017 Schlumberger. All rights reserved. 17-OSS-249140
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