Composite spoolable tube
AssigneeFiberspar Corporation
InventorsPeter A. Quigley, Stephen C. Nolet, Jerry G. Williams
Life of this patent
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Abstract
A spoolable composite tube capable of being spooled onto a reel for storage and for use in oil field applications. The spoolable tube exhibits unique anisotropic characteristics that provide improved burst and collapse pressures, increased tensile strength, compression strength, and load carrying capacity, while still remaining sufficiently bendable to be spooled onto a reel in an open bore configuration. The spoolable composite tube can include an inner liner, an interface layer, fiber composite layers, a pressure barrier layer, and an outer protective layer. The fiber composite layers can have a unique triaxial braid structure.
Claims30
A spoolable composite tube extending along a longitudinal axis, the composite tube comprising:
- a substantially fluid impervious liner,
- a first composite layer enclosing the liner, the first composite layer being formed of a first set of fibers embedded in a matrix, at least 80%, by fiber volume, of the fibers of the first set of fibers being helically oriented relative to the longitudinal axis at an angle of between 30° and 70°, the matrix having a tensile modulus of elasticity of at least 100,000 psi to contribute to the ability of the tube to withstand tensile strains imposed on the tube when the tube is spooled on a reel, and
- a pressure barrier layer for inhibiting fluids from penetrating the composite tube.
Dependencies are inferred from the claim text.