A towable and steerable elongated float for a marine seismic source arrangement for use in making a seismic survey at sea, having first attachment means at a lower or bottom part of a float body for allowing at least one seismic source to be suspended from the float, and second attachment means on a fore part of the float body for attachment of a strength taking source towing line or umbilical. The float body comprises first and second elongated steering foils being attached to and spaced from respective port and starboard sides of the fore part of said float body by respective support arrangement. The steering foils have respective longitudinal steering foil axes being oriented in a direction substantially perpendicular to a longitudinal axis of the float body and so as to be substantially perpendicular to a sea surface when in use, the elongated steering foils having respective first and second chord axes. Controlling means control an angle of at least one of the first and second chord axis with respect to the float body longitudinal axis.

A method is described for the dampening of the roll movements of a ship at sea, said ship comprises one or more, in the main, transversely placed, partially filled with liquid, roll dampening tanks, where the liquid in the tank is set up to swing in antiphase with the roll movements of the ship to hinder that the ship rolls, where a measuring and a control system is used to register antiphase and possible deviations from said antiphase and the amount of liquid in the tank is regulated to achieve said antiphase. The method is characterised in that the height of the liquid up along the wall surfaces of the tank, in particular along the end wall surfaces, is measured and registered at any time with the help of one or more sensor elements, said height measurement data from the one or more sensor elements is registered in a monitoring system that determines said deviation from the ideal antiphase, and on the basis of said measurement data the system carries out a regulation of the amount of fluid in the tank to achieve said antiphase. Also described is a device for carrying out the method.

A method and a device for enabling the use of riserless drilling fluid recovery from a seabed-based borehole (1) which is to be drilled by means of a casing (26), the casing (26) being provided with a drill bit (28) at its lower portion and with an inner wellhead (30) at its upper portion, and there being a conductor casing (6), which has an outer wellhead (8), in the seabed (2), the method including: - providing a suction module (12) with a dividable adapter (16) which fits complementarily in the outer wellhead (8); - drilling a length of the borehole (1) by means of the casing (26) extending through the suction module (12), while, at the same time, drilling fluid is flowing via the suction module (12) from the borehole (1); - subsequently pulling the adapter (16) up from the outer wellhead (8) and dividing the adapter (16); and - lowering the casing (26) with the inner wellhead (30) through the suction module (12) and the adapter (16) to its position in the outer wellhead (8).

A garment comprising at least two layers, wherein the first layer (1) is a protective shell, the second layer (4) is an insulating layer. The insulating layer (4) has a thickness sufficient to form predefined holes each capable of holding a volume of air.

It is disclosed a system for cleaning ballast water in a ship. The system includes a filter unit (2), a descaler (4) and a UV unit (3) installed in series. The filter unit includes a coarse (6) and a fine (10) filter section with cleaning devices (7, 11, 15) for continuously cleaning of the filter sections. The descaler includes a pipe section with a coil (17) wound thereon, and a signal generator for energizing the coil with a square wave signal that is swept in frequency. The UV unit includes a longitudinal cylindrical vessel with a water inlet and a water outlet, a number of glass tubes installed in the vessel, in the longitudinal direction thereof, and fluorescent UV tubes installed in the glass tubes.

A valve seat arrangement (4) in a hydraulic valve (1) provided with a bidirectional secondary barrier (5) including a first, upstream seal (51) and a second, downstream seal (52) and an intermediate, axially movable seal-supporting element (53), the seal- supporting element (53) including, at a first end, an annular first seal abutment (531) surrounded by a second supporting abutment surface (534) displaced in the axial direction towards a valve seat (42); and the seal-supporting element (53) including, at a second end, an annular second seal abutment (532) surrounding a first supporting abutment surface (532) displaced in the axial direction away from the valve seat (42).

The invention is a method for quick startup of Hot gas engines/Stirling engines. The problem with startup of Hot gas engines/Stirling engines is that they take a long time to reach normal operation. Long start up time becomes a problem for using such engines as emergency means either for powering of mechanical equipment or as an engine for a generator. The invention concerns using the heat required for evaporation of a liquid in order to quickly cool the cold side (3) of one or more Hot gas engines/Stirling engines. Cooling is performed by feeding a volatile liquid at startup from a pressure vessel (9) to a heat exchanger (11) mounted on the cold side (3) of a Hot gas engine/Stirling engine. Volatile liquids evaporate in the heat exchanger (11) at normal atmospheric pressure and thus low evaporation temperature. When used as emergency means, typically as an emergency cooling system for a nuclear reactor, Hot gas engines/Stirling engines are kept warm at its hot side (4) all the time before start up in order to quickly achieve normal operation. The engines are fully expanded before startup such that the working media is also heated. When using flammable volatile liquids (such as Propane) for cooling of the Hot gas engine/Stirling engine's cold side (3) it can be necessary to burn off the evaporated gas at the outlet (13). The flaring can also be used as a supplementary warning signal. The outlet (13) can be a catalytic flare. When using flammable volatile liquids for cooling of the cold side (3) of Hot gas engines/Stirling engines it is necessary to fill the heat exchanger (11) with an inert gas. If outlet (13) is mounted high over the heat exchanger (11), an inert gas that is heavier than air can be used. This gas is naturally stored in the heat exchanger (11). The heat exchanger's outlet (13) is equipped with a cap or other easily removable leak proofing means.

Described herein is a novel hardening accelerator including at least one inorganic thiocyanate, at least one alkanolamine, at least one organic polyol and optionally water that accelerates the hardening of hydraulic binders containing Portland cement and in particular Portland cement with a high level of fly ash. Also described herein is a method for accelerating the hardening of hydraulic binders or mixtures containing the hydraulic binders.

Longitudinal flow installation (1) for farming of aquatic organisms, wherein the longi- tudinal flow installation (1) comprises a raceway (2); wherein the raceway (2) is struc- tured to be filled with water for allowing aquatic organisms to be accommodated; wherein the raceway (2) comprises an inlet portion (21) for water and an outlet por- tion (23) for water, and the outlet portion (23) is provided with a first drain (7) for the water; wherein the longitudinal flow installation (1) is provided with a fluid supply (41, 45) for allowing oxygen to be supplied to the water, and wherein the longitudinal flow installation (1) is further provided with at least one return conduit (3) for circulation of the water in the raceway (2), wherein the return conduit (3), in an inlet portion (31) and an outlet portion (33) thereof, is provided with a submerged, water flow-through and organism-excluding element (35, 39).

Method for concentration of iodide from a first aqueous, iodidic solution (2) and to a second aqueous, iodidic solution (92), the method comprising the steps: a) to acidify the first solution (2;32) with a mineral acid; b) to add an oxidizing agent to an acidic solution (2'; 32') from step a) in order to oxidize iodide to elementary iodine; c) to add an amylose-containing material to a solution (2";32") from step b) such that an iodine-amylose-complex is formed; d) to substantially separate the iodine-amylose-complex formed in step c) from a fluid (36); e) to add a reducing agent to an iodine-amylose-complex fraction (80) containing the iodine-amylose-complex from step d) in order to reduce elementary iodine to iodide in order to separate iodide from amylose; and f) to separate the mixture (80') from step e) in a second aqueous, iodidic fraction (92) and an amylose-containing fraction (90), where step d) comprises using at least one separation device (70) comprising a filter.