Patent ID: 11906078
Assignee: POLYFLOW LLC
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A multilayer polymer pipe assembly used in transporting and/or distributing oilfield fluid, at an internal pressure of up to 3000 psi, comprising:
a first section and a second section of multilayer polymer pipe, the first and second sections of multilayer polymer pipe each comprising:
an inner layer comprising a chemical barrier layer; and
an outer layer comprising a structural support layer;

an insert positioned within an end region of the first section of multilayer polymer pipe and an end region of the second section of multilayer polymer pipe, such that an annular gap is formed between the insert and the end regions of multilayer polymer pipe;
an adhesive positioned internal to the end regions and sealing a surface of the insert and the annular gap between the insert and the end regions; and
an external coupler positioned over the end regions and joining the first and second sections of multilayer polymer pipe,
wherein the external coupler is an electrofusion coupler, and
wherein the electrofusion coupler is configured to bond to an outer surface of the end regions of multilayer polymer pipe.