A substantially continuous stream of aqueous fluid and a substantially continuous stream of gel having a first concentration are combined to form a substantially continuous stream of gel having a second concentration. The second concentration is substantially lower than the first concentration. The gel having the second concentration may thereafter be utilized in conjunction with a well fracturing operation.

The present invention relates to a system (100) for manufacturing a Field Joint Coating (11), the system comprising: a heating device (102) for heating a quantity of a polymer, an upstream pump (104) for pumping the quantity of heated polymer into a storage compartment (106) of an ejection device (108), the ejection device (108) which is constructed for each time ejecting the heated polymer from its storage compartment, the ejection device comprising: o a barrel (1 10) which defines the storage compartment, the barrel being reinforced and configured for repeated use, o a plunger (1 1), o an actuator (1 14) for driving the plunger through the barrel for emptying the storage compartment, a downstream pump, the downstream pump being constructed for increasing the operating pressure of the ejected polymer, a mould (200) configured to be positioned at a field joint (13) around a pipeline.