Abstract: A fluid treatment system comprises a fluid treatment module having a fluid inlet and first and second fluid outlets. A pump is provided to establish a first pressure differential between the fluid inlet and one of the first and second fluid outlets of the fluid treatment module, and an eductor is provided to establish a second pressure differential between the fluid inlet and the other of the first and second fluid outlets of the fluid treatment module. The pump is adapted to deliver a motive fluid to the eductor.

Abstract: A fluid treatment apparatus comprises a fluid vessel defining first and second fluid chambers. A fluid inlet is provided for delivering a fluid to be treated into the first fluid chamber. One or more nozzle assemblies are provided for fluid communication between the first and second fluid chambers, wherein said nozzle assemblies are adapted to facilitate mixing of a gas with said fluid. The second fluid chamber is adapted to accommodate a fluid treatment process therein, including a floatation treatment. One specific use of the fluid treatment apparatus includes separating oil from water, particularly water produced from a subterranean formation.

Abstract: The invention relates to a system (100) for the cleaning of sand, originating from subterranean oil production and comprises separation of sand from adhering oil out of a sand/oil/water slurry. The sand is cleaned through treatment in a hydrocyclone (13) through rubbing against themselves and the walls of the hydrocyclone. The hydrocyclone discharges the larger/heavier particles into a vessel (1), wherein the vessel has a discharge port (3) for the sand. A fluid extractor (34) is provided between the hydrocyclone (13) and the discharge port of the vessel (1), for extracting fluid from the vessel (1) to permit an increased flow rate of sand into the vessel. The invention also relates to a method of cleaning sand and a method of increasing the flow rate of sand through a hydrocyclone cleaning system as described above.

Abstract: The invention relates to a cleaning system for hydrocyclone sand cleaning comprising a hydrocyclone for receiving a slurry containing sand to be cleaned and a vessel for receiving sand exiting the hydrocyclone, wherein the vessel has an discharge port for the sand. A fluid extractor is provided between the hydrocyclone and the discharge port, for extracting fluid from the vessel to permit an increased flow rate of sand into the vessel. The invention also relates to a method of cleaning sand and a method of increasing the flow rate of sand through a hydrocyclone cleaning system such as that described above.

Abstract: A method of treating a fluid comprises producing a permeate fluid (24) from an outlet (22) of a filtration unit (12), delivering the permeate fluid (24) to be injected into a subterranean formation, and recirculating at least a portion of the permeate fluid to be mixed with a source fluid (32) to produce a feed fluid (14) to be treated within the filtration unit (12).

Abstract: A fluid treatment system comprises a fluid treatment module having a fluid inlet and first and second fluid outlets. A pump is provided to establish a first pressure differential between the fluid inlet and one of the first and second fluid outlets of the fluid treatment module, and an eductor is provided to establish a second pressure differential between the fluid inlet and the other of the first and second fluid outlets of the fluid treatment module. The pump is adapted to deliver a motive fluid to the eductor.

Abstract: An apparatus (10) for treating a fluid to be injected into a subterranean hydrocarbon-bearing formation comprises a desalination system (12) having a fluid inlet (16) for receiving a first feed fluid (18) and a first fluid outlet (22) for delivering a first product fluid (20). The apparatus (10) also includes a selective ionic species removal plant (30) having a fluid inlet (36) for receiving a second feed fluid (34) and a fluid outlet (40) for delivering a second product fluid (38), wherein the second product fluid (38) has a preferred ionic concentration. A mixer (46) is provided for mixing at least a portion of the first product fluid (20) and at least a portion of the second product fluid (38) to provide a third or injection product fluid (48). Accordingly, injection fluid can be created which has a preferred ionic concentration suitable for injecting into a well (28).