An apparatus for separating solid particles from a hydrocarbon-containing fluid produced from an oil and/or gas production facility, the apparatus being adapted to be supported on a wellhead or a riser connected to a wellhead , the apparatus comprising: a conduit for conveying a hydrocarbon-containing fluid from a wellhead , the conduit being adapted to be connected to the wellhead or a riser connected to the wellhead ; a solids separator in fluid communication with the conduit , the solids separator being adapted to separate solid particles from the hydrocarbon-containing fluid, the solids separator having an inlet, coupled to the conduit , for the hydrocarbon-containing fluid, a solids outlet for outputting solid particles separated by the solids separator from the hydrocarbon-containing fluid, and a fluid outlet for outputting hydrocarbon-containing fluid separated by the solids separator from the solid particles; and an output conduit , coupled to the fluid outlet , for conveying the hydrocarbon-containing fluid from the fluid outlet into a production line attached to the wellhead , characterised by the apparatus further comprising a flow adaptor which is adapted to be installed in the wellhead , wherein the flow adapter provides a first flow conduit for passage therethrough of a first flow comprising the hydrocarbon-containing fluid containing solid particles passing through the wellhead to the conduit and a second flow conduit, connected between the output conduit and the production line , for passage therethrough of a second flow comprising the hydrocarbon-containing fluid which has been separated from the solid particles, wherein the first and second flow conduits are configured to prevent mixing of the first and second flows . a conduit for conveying a hydrocarbon-containing fluid from a wellhead , the conduit being adapted to be connected to the wellhead or a riser connected to the wellhead ; a solids separator in fluid communication with the conduit , the solids separator being adapted to separate solid particles from the hydrocarbon-containing fluid, the solids separator having an inlet, coupled to the conduit , for the hydrocarbon-containing fluid, a solids outlet for outputting solid particles separated by the solids separator from the hydrocarbon-containing fluid, and a fluid outlet for outputting hydrocarbon-containing fluid separated by the solids separator from the solid particles; and an output conduit , coupled to the fluid outlet , for conveying the hydrocarbon-containing fluid from the fluid outlet into a production line attached to the wellhead , characterised by the apparatus further comprising a flow adaptor which is adapted to be installed in the wellhead , wherein the flow adapter provides a first flow conduit for passage therethrough of a first flow comprising the hydrocarbon-containing fluid containing solid particles passing through the wellhead to the conduit and a second flow conduit, connected between the output conduit and the production line , for passage therethrough of a second flow comprising the hydrocarbon-containing fluid which has been separated from the solid particles, wherein the first and second flow conduits are configured to prevent mixing of the first and second flows . <EOS>