Abstract: The present invention relates to a nozzle arrangement and method for removing solids and/or fluids, such as sludge, preferably suspended or contained in fluid, from tanks such as oil/mud-tanks and other similar difficult accessible deposits and tanks/tanks. In preferred embodiments, the nozzle arrangement has a rotating mechanism (8) comprising a primary drive shaft (13) being connected to a pipe section (4), a row of gear teeth (9) fixedly arranged on or formed in lower end of a down pipe (3) on an outside thereof, an angular gear (10), a worm gear (16) arranged to rotate an angled nozzle pipe section (7) at the cleaner head (5) driven by the angular gear, a secondary drive shaft (11) rotatably mounted on an outside of said pipe section (4) and having at one end a gear wheel of the angular gear (10) and at the other end a gear wheel co-operating with said row of gear teeth (9).

Abstract: A system of separating oil and water from produced or fracturing water with an intended separation direction, the system includes: a unit for feeding the produced or fracturing water to a solid-fluid separator; a membrane system configured to output clean water; and a decanter configured to output solids, wherein the decanter or the membrane system is coupled to an output of the solid-fluid separator; wherein the membrane system or the decanter is configured to feed remaining fluid from the membrane system or decanter to an oil extractor system configured to output oil; and wherein the oil extractor system comprises a high speed separator configured to output the oil, and has a feedback conduit for feeding a remaining water containing fluid back to the membrane system.