... Abstract An industry first was achieved by successfully dissolving 200 kg of barium sulphate scale from the upper part of the tubing in a well on the Alwyn North field in the North Sea. This well experienced rapid and very severe sulphate scale build-up resulting in the tubing retrievable...

... in optimising treatment designs and in identifying wells where treatments are no longer required. dissolver wax inhibition seawater breakthrough sulphate scale remediation of hydrates workover asphaltene remediation scale inhibition hydrate inhibition upstream oil & gas wellbore...

... PRECIPITATION PRECIPITATION Of these three factors, SUPERSATURATION is the primary cause of scale formation and occurs when a solution contains dissolved materials which are at higher concentrations than their equilibrium concentration. Solutions can become supersaturated by changes in conditions...