Abstract: A bi-directional filter includes an outer housing and a filter assembly unit. The outer housing is provided with one inlet for contaminated fluid and at least one outlet. The filter assembly unit includes at least one separation void for contaminated fluid. The filter assembly unit, at least one separation void, and the outer housing provide an outer dead end and an inner dead end within the bi-directional filter. The filter assembly unit is connected to a drive unit through a shaft.

Abstract: The present invention relates to an arrangement in a pipe bundle, more specifically to a method and a system for heating subsea or on-shore pipelines, especially pipelines for transportation of substantially oil, gas and water, said pipelines (8, 108, 208) being arranged in a substantially cylindrical outer carrier pipe (1, 101, 201), and for the purpose of providing an arrangement wherein the quantity of heating cable can be reduced, and wherein the manufacturing of such arrangement can be simplified, at the same time as the finished arrangement will provide appropriate heating of the pipelines and the contents thereof, it is according to the invention suggested an arrangement comprising:a carrier pipe (1, 101) having an outer and/or inner thermal insulation (2, 102),one or more longitudinally extending energy carriers (3, 4, 5; 103, 104, 105) extending in the longitudinal direction of said carrier pipe (1, 101) for the dissipation/transfer of heat directly and/or indirectly to said pipelines (8, 108), respe

Abstract: The present invention relates to a method and a transmitter/receiver for transferring signals through a medium in pipes or hoses, whereby at a transmitter side pressure pulses are generated of various frequencies or in various frequency ranges, and for the purpose of providing a technology which eliminates error sources, it is proposed according to the invention that the pressure pulses be generated at the transmitter side as an organised and defined bit pattern in order thereby to achieve one or two-way alphanumeric communication.