Extruded aliphatic polyketone permeation barrier for spoolable composite pipes

A non-metallic spoolable composite pipe for oil and gas flowlines, comprising:

• an inner extruded tubular liner configured to be in direct contact with a fluid comprising hydrocarbons flowing through the spoolable composite pipe;
• a polymer reinforcement layer surrounding the inner extruded tubular liner;
• and
• an outer extruded tubular cover surrounding the reinforcement layer;
• where the inner extruded tubular liner comprises an aliphatic polyketone having the formula (I)
• [[—CH2CHR1(C═O)—]n[—CH2CHR2(C═O)—]m]p, (I)
• where R1 and R2 are independently from one another the same or different,
• where R1 is selected from the group consisting of hydrogen and an alkyl group, and
• where R2 is an alkyl group, and
• where n is less than 0.5 and n+m=1,
• where p is an integer between 500 and 5000,
• where structural units [—CH2CHR1(C═O)—] and [—CH2CHR2(C═O)—], are randomly distributed, blocked or both, and
• where the spoolable composite pipe is 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 based on the total hydrocarbons content.