Fiber reinforced spoolable pipe
A spoolable pipe is disclosed, the spoolable pipe having an internal pressure barrier formed about a longitudinal axis, and a reinforcing layer(s) enclosing the internal pressure barrier. In one embodiment, the reinforcing layer(s) can include fibers having at least a partial helical orientation about approximately thirty and about approximately seventy degrees relative to the longitudinal axis, and, the wall can include at least one external layer enclosing the reinforcing layer(s) and having a permeability at least ten times greater than the permeability of the internal pressure barrier. The reinforcing layer(s) can further include a coating. The pipe can also include an energy conductor(s) integrated with and/or located between the internal pressure barrier and/or the reinforcing layer(s).
1. A spoolable pipe, comprising:
an internal pressure barrier formed about a longitudinal axis;
at least one reinforcing layer comprising glass and enclosing the internal pressure barrier, the at least one reinforcing layer comprising at least two plies of fibers having at least a partial helical orientation relative to the longitudinal axis, wherein at least one abrasion resistant layer is disposed between the at least two plies of fibers; and
an external layer enclosing the at least one reinforcing layer.
2. The spoolable pipe according to claim 1 , wherein said at least two plies of fibers have about an equal but opposite helical orientation relative to the longitudinal axis.
3. The spoolable pipe according to claim 1 , wherein at least some of said fibers are substantially axially oriented.
4. The spoolable pipe according to claim 1 , where the internal pressure barrier includes at least one of: a thermoset plastic, a thermoplastic, an elastomer, a rubber, a co-polymer, and a composite, where the composite includes at least one of: a filled polymer and a nano-composite, a polymer/metallic composite, and a metal.
5. The spoolable pipe according to claim 4 , where the internal pressure barrier layer comprises at least one of: high density polyethylene (HDPE), cross-linked polyethylene, polyvinylidene fluoride (PVDF), polyamide, polypropylene, polyethylene terphthalate, and polyphenylene sulfide (PES).
6. The spoolable pipe according to claim 1 , where the internal pressure barrier includes a modulus of elasticity greater than about 50,000 psi.
7. The spoolable pipe according to claim 1 , where the internal pressure barrier includes a strength greater than about 1,000 psi.
8. The spoolable pipe according to claim 1 , where the internal pressure barrier carries at least twenty-five percent of the axial load along the longitudinal axis at a termination.
9. The spoolable pipe according to claim 1 , where the internal pressure barrier carries at least fifty percent of an axial load in the longitudinal direction at a termination.
10. The spoolable pipe according to claim 1 , where the internal pressure barrier carries at least sixty percent of an axial load in the longitudinal direction at a termination.