FRACTURING LIQUID DELIVERY HOSE FOR RECOVERY OF SHALE OIL & GAS, AND MANUFACTURING METHOD AND CO-EXTRUSION MOLD THEREOF

摘要

Provided are a fracturing liquid delivery hose for recovery of shale oil & gas, and manufacturing method and co-extrusion mold thereof. The method for manufacturing the fracturing liquid delivery hose for recovery of shale oil & gas according to the present invention includes: (1) extrusion of a cover layer bearing an adhesive layer; (2) extrusion of an inner lining bearing the adhesive layer; (3) physically permeation of the extruded cover layer and the inner lining for standby use; (4) formation of an enhancement layer; (5) heating and pressurizing for physical and chemical bonding between the cover layer and the enhancement layer; (6) turning it over; (7) heating and pressurizing for physical and chemical bonding between the inner lining and the enhancement layer. In the present invention, the different types of materials may be used for the cover layer and the inner lining, and the cover layer and the inner lining of different materials may be combined for more needs and reduced product cost. The hose is more integral, anti-flexible, long in service life; but also has high resistance to high pressure, high delivering rate, convenient connection, desirable weather- and chemical-resistance, and is suitable for various topographies. In case of no service, it is flat, easily wound up and has low volume during storage and transportation.

主权项

1. A method for manufacturing a fracturing liquid delivery hose for recovery of shale oil & gas, comprising:
(1) Extrusion of a cover layer bearing an adhesive layer: extruding the cover layer grains and adhesive grains by two extruders into a co-extrusion mold, and subjecting a coextruded laminate layer to cooling, pulling and squashing to give a flat tube i.e. the cover layer bearing the adhesive layer, wherein the adhesive layer has a thickness of 0.10-0.35 mm and the cover layer has a thickness of 0.5-4.0 mm; (2) Extrusion of an inner lining bearing an adhesive layer: extruding the inner lining grains and adhesive grains by two extruders into a co-extrusion mold, and subjecting the coextruded laminate layer to cooling, pulling and squashing to give a flat tube i.e. the inner lining bearing the adhesive layer, wherein the adhesive layer has a thickness of 0.10-0.35 mm and the inner lining has a thickness of 0.5-4.0 mm; (3) Separate treatment of the intermediates from Step (1) and Step (2) on the surface: immersing it into a solution for physical permeation prior to use, wherein the solution is formulated from a curing agent and solvent at a ratio of 10-30:70-90; (4) Formation of an enhancement layer: weaving a tubular enhancement layer according to product design specification; (5) Bonding between the cover layer and the enhancement layer: pulling the surface-treated cover layer with the adhesive layer from Step (3) into the tubular enhancement layer, fixing at both ends, passing through a steam of 0.10-0.35 Mpa for 4-10 minutes, prior to cooling with air in place of steam while maintaining pressure to the desired temperature; (6) Turnover: turning over the product from Step (5) to exchange its inner layer for the outer layer; (7) Bonding between the inner lining and the enhancement layer: pulling the surface-treated inner lining with the adhesive layer from Step (3) into the product from Step (6), fixing at both ends, passing through a steam of 0.10-0.35 Mpa for 4-10 minutes, prior to cooling with air in place of steam while maintaining pressure to a desired temperature.