Abstract: Spoolable composite pipes for oil and gas flowlines may include an inner extruded tubular liner, a reinforcement layer surrounding the inner extruded tubular liner, and an outer extruded tubular cover surrounding the reinforcement layer. In these spoolable composite pipes, the inner extruded tubular liner may include an aliphatic polyketone. Internally lined pipes for oil and gas flowlines for oil and gas flowlines may include inner extruded tubular liner containing an aliphatic polyketone, and a carbon steel pipe surrounding the inner extruded tubular liner. The spoolable composite pipes and the internally lined pipes may be configured to operate at temperatures of up to about 110° C., and to carry hydrocarbons having an aromatic content of up to about 35% by volume of the total hydrocarbons content.

Abstract: A system and method for coupling pipes includes a first pipe having a tapered, spigot end; and a second pipe having a tapered, socket end adapted to internally receive the tapered, spigot end of the first pipe. The first pipe and the second pipe are made from a reinforced thermosetting resin (RTR) material. A thermal joining process is used to bond a thermoplastic material onto the RTR material of the first pipe, the second pipe, or both pipes. Upon application of thermal heating to the first and second pipes, the heat between the first pipe and the second pipe is sufficient to melt the thermoplastic material such that, when the heat is removed, the hardened thermoplastic material seals the first pipe to the second pipe. A system and a method of coupling the first pipe and the second pipe may include the coupler made of RTR material.