Abstract: Apparatus for monitoring the quality of gas in a process stream at a subsea location comprises: a container for permanent installation at the location; one or more devices for analysing gas quality, said devices being located in the container; and means for supplying a sample of gas from the process stream to the said one or more devices; wherein the pressure within the container is maintained at or near to atmospheric pressure. The invention also extends to a method of monitoring the quality of gas in a process stream at a subsea location.

Abstract: The invention relates to a method for automatically monitoring the liquid content in a gas, and in particular the gas leaving a scrubber and entering a compressor. In the method, a sample of fluid is taken from the outlet of the compressor, its temperature and pressure are automatically varied, and the pressure and temperature at which condensation forms is automatically detected. The pressure and temperature thus detected can be used to determine the liquid content in the gas. In a variant method, the temperature and pressure of the sample are automatically varied, and the rate of liquid condensation is measured to determine the liquid content. The invention also extends to a device for cooling a gas so that the liquid content of the gas can be determined, including a cooled housing with a cavity therein, and means for measuring the temperature and pressure within the cavity.

Abstract: Apparatus for monitoring the quality of gas in a process stream at a subsea location comprises: a container for permanent installation at the location; one or more devices for analysing gas quality, said devices being located in the container; and means for supplying a sample of gas from the process stream to the said one or more devices; wherein the pressure within the container is maintained at or near to atmospheric pressure. The invention also extends to a method of monitoring the quality of gas in a process stream at a subsea location.

Abstract: A combined fluid collector and redistributor for a process engineering column, including a fluid collector for collecting a first fluid; a fluid redistributor arranged below the fluid collector to define a space between the fluid collector and the fluid redistributor; at least one pipe passing through the space to connect the fluid collector to the fluid redistributor; and at least one conduit extending through the fluid collector to permit a second fluid to flow through the fluid collector. There is at least one deflector in the space, wherein the at least one deflector is set at an angle relative to a central axis of the device whereby flow of the second fluid within the space is displaced angularly around the central axis.

Abstract: The invention relates to a method for automatically monitoring the liquid content in a gas, and in particular the gas leaving a scrubber and entering a compressor. In the method, a sample of fluid is taken from the outlet of the compressor, its temperature and pressure are automatically varied, and the pressure and temperature at which condensation forms is automatically detected. The pressure and temperature thus detected can be used to determine the liquid content in the gas. In a variant method, the temperature and pressure of the sample are automatically varied, and the rate of liquid condensation is measured to determine the liquid content. The invention also extends to a device for cooling a gas so that the liquid content of the gas can be determined, including a cooled housing with a cavity therein, and means for measuring the temperature and pressure within the cavity.

Abstract: A combined fluid collector and redistributor for a process engineering column, including a fluid collector for collecting a first fluid; a fluid redistributor arranged below the fluid collector to define a space between the fluid collector and the fluid redistributor; at least one pipe passing through the space to connect the fluid collector to the fluid redistributor; and at least one conduit extending through the fluid collector to permit a second fluid to flow through the fluid collector. There is at least one deflector in the space, wherein the at least one deflector is set at an angle relative to a central axis of the device whereby flow of the second fluid within the space is displaced angularly around the central axis.