Materials
Composite Drill Pipe An Available Option
Lincoln has been producing flexible composite drill pipe for short-radius, horizontal drilling since 1991. Its nominal 2.375 inch /60.3 mm (OD), 30 ft/9m long pipe shaft is filament wound with 12K carbon fiber combined with glass fibers in epoxy resin over an elastomeric liner. Standard API rotary shoulder too
Read MoreComposite Tether Goes To Sea
Conoco and KOP have manufactured a prototype of a carbon fiber composite tether that could extend TLP production to depths exceeding 10,000 ft/3,000 m. The design has undergone extensive static testing and fatigue loading and has been verified through hydrodynamic model testing. Sea testing is being planned.
Read MoreCustom Wet Layup Repair Solutions
In the second group are customized repairs, employing glass or carbon reinforcement, wet out with vinyl ester, polyester or epoxy resin and applied to the pipe by trained personnel, have been available since the mid-1990s. Selection of reinforcement material, wrap thickness and overlay length is dictated by th
Read MoreComposite Piping On Hoover-Diana
EDO supplied a drain system for Hoover-Diana, a deep draft caisson vessel (DDCV) put into service in May 2000 by Exxon Mobil and British Petroleum. Hoover- Diana, located in the Gulf of Mexico’s East Breaks and Alaminos Canyon Blocks at a water depth of approximately 4,800 ft, is designated as a DDCV instead o
Read MoreRTP Niches Into Low-Pressure Applications
Wellstream (a Halliburton business unit) supplies lightweight reinforced thermoplastic pipe, or RTP, which is designed for applications intermediate between those that can use low-pressure, unreinforced thermoplastic pipe or hose, and those that require high-pressure unbonded flexible pipe. Used mainly in onsh
Read MoreLooking Forward
Current composite tether designs are leveraged to take advantage of existing oil-field manufacturing facilities. The wirerope stranding facilities, umbilical closing machines, steel anchors and installation methods used today for steel and synthetic cables can immediately accommodate rope-style composite tethe
Read MoreInterplay Of Materials And Use Conditions Key To Design
A wide variety of thermoplastic resins is used for the inner fluid/pressure barrier layer, which contains the conveyed material and eliminates any possibility of weeping through the fiber composite. The most common are families of polyolefins (e.g., polyethylenes), polyphenylene sulfides (PPS), nylons (polyami
Read MoreFiberglass Ideal For Dry Deluge System Applications
Around 1982, offshore platforms began using dry deluge systems, where the ring main is kept full of seawater but the downstream piping is dry. The dry piping is separated from the ring main by deluge valves, which automatically open and distribute water through the dry pipe to spray nozzles during a fire. This
Read MoreModular Cable Offers Flexibility
The Composite Carbon Cable system developed by Doris Engineering, IFP, Soficar and Freyssinet is based on a different design. Their concept is to assemble a tether from uniformly sized strands or “modules” made up of parallel rods. Each module is hexagonally shaped, allowing any number of modules (strands) to
Read MoreOngoing Research And Onshore Applications Lead The Way
Deep subsea developments require integrated service umbilicals (ISUs) to transport hydrate control fluids, such as methanol, and hydraulic fluids to control valves at subsea wellheads. ISUs are typically made from small-diameter (typically 0.25 inches/6.5 mm up to 2 inches/50 mm) stainless steel tubes and/or s
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