Abstract: An apparatus for controlling the injection pressure of an aqueous polymeric solution in an oil well is formed by: at least one pressure modulation valve, allowing, per valve, a maximum pressure loss of 5 bars practically without any mechanical deterioration, the one or more valves being connected in line with; a tube containing vortex modules, each creating a maximum pressure loss of 5 bars, practically without any mechanical deterioration, a vortex module being a section of tube, which is closed at one of its ends by a cap perforated with a hole, and which can be inserted into the detachable tube. The purpose of the apparatus is the ability to reduce the pressure to 100 bars with total mechanical deterioration of less than 10%. A method for using the apparatus is also contemplated.

Abstract: An apparatus for controlling the injection pressure of an aqueous polymeric solution in an oil well is formed by: at least one pressure modulation valve, allowing, per valve, a maximum pressure loss of 5 bars practically without any mechanical deterioration, the one or more valves being connected in line with; a tube containing vortex modules, each creating a maximum pressure loss of 5 bars, practically without any mechanical deterioration, a vortex module being a section of tube, which is closed at one of its ends by a cap perforated with a hole, and which can be inserted into the detachable tube. The purpose of the apparatus is the ability to reduce the pressure to 100 bars with total mechanical deterioration of less than 10%. A method for using the apparatus is also contemplated.

Abstract: Process to stop and/or prevent the spreading of peat fires consisting of: digging a trench in the periphery of the area of outbreak of fire or potential fire, filling the trench at least partially with a superabsorbent (co)polymer (SAP).

Abstract: A process for limiting the level of flooding of a watercourse, notably a wide river, a narrow river and/or one of its tributaries, consisting of injecting into the said watercourse at least one friction-reduction agent.

Abstract: The improved process for conditioning sludges by flocculation, according to which: the sludge to be treated is transported in a pipeline, at least one flocculating agent is inserted in the pipeline that transports the sludge to be treated, the sludge is then mixed with the said flocculating agent. finally, the mixture is transported and then discharged in a natural or an artificial excavation at a distance from the bottom of the said excavation that is less than its depth.

Abstract: A method for loading the hold of an ore carrier with loose ore, according to which the hold is loaded, consecutively, with a portion of the ore treated with a superabsorbent polymer and a portion of the ore not treated with a superabsorbent polymer.

Abstract: A process for limiting the level of flooding of a watercourse, notably a wide river, a narrow river and/or one of its tributaries, consisting of injecting into the said watercourse at least one friction-reduction agent.

Abstract: Compact and transportable preparation center which can be used for fracturing operations on gas or oil fields, capable of metering out and dissolving two different polymers in the powder form, and including: two pneumatic mechanisms respectively supplying two storage hoppers for two separate polymers; two mechanisms for supplying and metering the polymer originating respectively from the two storage hoppers to a device for dispersing by grinding, also denoted PSU; two series of tanks for hydration and dissolution of the polymers connected to the dispersing and grinding device; two positive displacement vacuum pumps for metering the two solutions each originating from the two series of hydration and dissolution tanks and intended to supply a mixer itself connected to a high-pressure injection pump. Fracturing process employing the preparation center.

Abstract: Process of loading the hold of a bulker in which the hold is loaded in succession with part of the ore treated with a superabsorbent polymer (SAP) and part of the ore not treated with a superabsorbent polymer (SAP).

Abstract: A device for injecting polymer into, then mixing in, a pipeline carrying a suspension of solid particles, includes, in combination at least one flange accepting polymer injection pipeline, and a stirrer including a rotor with at least one stirring blade positioned at right angles to the flow, with the rotor being rotationally driven by a drive.

Abstract: The improved process for conditioning sludges by flocculation, according to which: the sludge to be treated is transported in a pipeline, at least one flocculating agent is inserted in the pipeline that transports the sludge to be treated, the sludge is then mixed with the said flocculating agent. finally, the mixture is transported and then discharged in a natural or an artificial excavation at a distance from the bottom of the said excavation that is less than its depth.

Abstract: Process to stop and/or prevent the spreading of peat fires consisting of: digging a trench in the periphery of the area of outbreak of fire or potential fire, filling the trench at least partially with a superabsorbent (co)polymer (SAP).

Abstract: A process for the enhanced recovery of oil in a deposit introduces into the deposit an alkaline aqueous solution of a water-soluble polymer containing a surfactant. The aqueous solution of water-soluble polymer introduced is prepared with an aqueous solution initially containing Ca2+ and Mg2+ ions treated with an alkaline agent and a dispersant, so as, prior to the introduction of the polymer and the surfactant into the aqueous solution, to precipitate, under the action of the alkaline agent and of CO2 optionally dissolved in the aqueous solution, the Ca2+ and Mg2+ ions. The precipitates are especially in the form of precipitates of calcium carbonate and of magnesium hydroxide and are dispersed owing to the dispersant, which is chosen in order to limit the size of the calcium carbonate and magnesium hydroxide precipitates.

Abstract: Compact and transportable preparation centre which can be used for fracturing operations on gas or oil fields, capable of metering out and dissolving two different polymers in the powder form, and including: two pneumatic means respectively supplying two storage hoppers for two separate polymers; two means for supplying and metering the polymer originating respectively from the two storage hoppers to a device for dispersing by grinding, also denoted PSU; two series of tanks for hydration and dissolution of the polymers connected to the dispersing and grinding device; two positive displacement vacuum pumps for metering the two solutions each originating from the two series of hydration and dissolution tanks and intended to supply a mixer itself connected to a high-pressure injection pump. Fracturing process employing the preparation centre.

Abstract: Enhanced oil recovery method consisting in continuously dissolving, in the injection water, a stable invert emulsion of acrylamide (co)polymer containing at least one inverting agent, and a water soluble polymer, whereby: in a first step, the emulsion is prediluted in a first static mixer to a (co)polymer concentration of at least 5 g/l, the difference of pressure between the mixer outlet and inlet being at least 2 bar, in a second step, the suspension from the first mixer is diluted in a second static mixer to a concentration corresponding to the injection concentration of the water in the well of between 500 and 3000 ppm, the difference of pressure between the mixer outlet and inlet being at least 1 bar.

Abstract: A method for dispersing a water-soluble polymer includes: metering and prewetting polymer with primary water; grinding and draining of the dispersed polymer in a chamber comprising a rotor and a stator; and providing a ring with perforations fed by a secondary water circuit on all or part of the periphery of the chamber for spraying of pressurized water on the blades of the stator.

Abstract: A method for dispersing a water-soluble polymer includes: metering and prewetting polymer with a primary water; grinding and draining of the dispersed polymer in a chamber comprising a rotor and a stator; and providing a ring with perforations fed by a secondary water circuit on all or part of the periphery of the chamber for spraying of pressurised water on the blades of the stator.

Abstract: A method for enhanced oil recovery in an oil-bearing formation having high permeability zones, constituting preferential passages for the injected liquid, involves blocking the preferential passages by injecting into the formation an aqueous solution based on water soluble polymers at a concentration such that the viscosity of the aqueous solution is higher than the viscosity of the oil. Once the blocking step is completed, an aqueous solution is injected having an identical composition to that used in the blocking step, but at a lower polymer concentration.

Abstract: Device for dispersing a water-soluble polymer comprising: a chamber for grinding and draining of the dispersed polymer comprising a rotor and a stator, and on all or part of the periphery of the chamber, a ring fed by a secondary water circuit. The ring communicates with the chamber for spraying of pressurized water on the blades of the stator. A method implementing the device is also provided.

Abstract: A process for treatment of produced water obtained from an enhanced oil recovery process from a reservoir, said water containing at least one water-soluble polymer, wherein: an oxidising agent is injected into produced water in a quantity such that the viscosity of said water is reduced to a value below 2 cps, advantageously of the order of 1.5 cps, in a short period from the injection of the oxidising agent, a reducing agent is then injected in the necessary quantity to neutralise all the resulting excess oxidising agent.