Method and device for remowal of a hydrate plug

摘要

A method for removal of a hydrate plug (7) in a tube (92) in connection with a petroleum well (9) is described, the method comprising : - to provide a hydrate plug remover (2), where the hydrate plug remover (2) comprises a collecting container (21) and where the method further comprises to: - position the hydrate plug remover (2) in a sluice (5); - fill the sluice (5) with a hydrate dissolving fluid; - fill the collecting container (21) which is provided with a valve (3) in the lower end portion (20) of the collecting container (21) with hydrate dissolving fluid through the valve (3); - pressure test the sluice (5); - displace the hydrate plug remover (2) from the hydrate plug (7) and let the hydrate dissolving fluid flow towards the hydrate plug (7) through a circulation gate (22) in the upper end portion (29) of the collecting container (21); - lead loosened hydrate from the hydrate plug (7) into the collecting container (21) via the valve (3); and - displace the hydrate plug remover (2) to the sluice (5) where the collecting container (21) is emptied of hydrate through the circulation gate (22) while hydrate dissolving fluid is flowing into the collecting container (21) through the valve (3). A hydrate plug remover for performing the method is also described.