A subsea multiphase separation system (100, 200, 500), comprising: an inlet line (204, 304); a divide (206, 302), wherein the divide horizontally splits the inlet line into two or more separate lines (208, 210) of similar diameter, and wherein the two or more separate lines of similar diameter are substantially parallel to one another, and are configured to separate components of a multiphase fluid; a control volume (116, 214) connected to the two or more separate lines of similar diameter, wherein the control volume has a diameter greater than the separate lines of similar diameter, wherein the control volume comprises outlet lines, and wherein the outlet lines are configured to flow substantially oil from an upper outlet line and flow substantially water from a lower outlet line; and a sand boot (112, 212, 512) connected to one of the separate lines of similar diameter, wherein the sand boot is disposed below the one of the separate lines of similar diameter, and wherein the sand boot is configured to collect and remove sand accumulated in the subsea multiphase separation system; and a jet nozzle, disposed within one of the separate lines of similar diameter and connected to the lower outlet line of the control volume, the jet nozzle being positioned at an injection point upstream of the sand boot such that fluid from the lower outlet line is injected into the sand boot to activate a sand removal cyclone within the sand boot which extends to the bottom of the sand boot and fluidizes sand in the sand boot, the sand removal cyclone causing the sand to be removed from the sand boot via a bottom connection without shutdown or slowdown of production of the subsea multiphase separation system. an inlet line (204, 304); a divide (206, 302), wherein the divide horizontally splits the inlet line into two or more separate lines (208, 210) of similar diameter, and wherein the two or more separate lines of similar diameter are substantially parallel to one another, and are configured to separate components of a multiphase fluid; a control volume (116, 214) connected to the two or more separate lines of similar diameter, wherein the control volume has a diameter greater than the separate lines of similar diameter, wherein the control volume comprises outlet lines, and wherein the outlet lines are configured to flow substantially oil from an upper outlet line and flow substantially water from a lower outlet line; and a sand boot (112, 212, 512) connected to one of the separate lines of similar diameter, wherein the sand boot is disposed below the one of the separate lines of similar diameter, and wherein the sand boot is configured to collect and remove sand accumulated in the subsea multiphase separation system; and a jet nozzle, disposed within one of the separate lines of similar diameter and connected to the lower outlet line of the control volume, the jet nozzle being positioned at an injection point upstream of the sand boot such that fluid from the lower outlet line is injected into the sand boot to activate a sand removal cyclone within the sand boot which extends to the bottom of the sand boot and fluidizes sand in the sand boot, the sand removal cyclone causing the sand to be removed from the sand boot via a bottom connection without shutdown or slowdown of production of the subsea multiphase separation system.