Why do we use a subsea test tree assembly (SSTTA) during well test clean-up operations? To create a dual barrier in-riser subsea safety system required to control the hazards associated with bringing live hydrocarbons to the surface and providing the capability to disconnect/reconnect the well. The subsea test tree is positioned inside the rig’s blowout preventer (BOP) and spaced out so that, if needed, the BOP shear rams can be activated across the SSTTA shear sub. | Expro

Subsea Oil Leak An oil spill leak under the ocean, especially from a subsea well, is a complex and hazardous event. Unlike surface spills, these leaks occur deep underwater, making them harder to detect, contain, and stop. Subsea Oil Leak It’s an uncontrolled release of oil from a well, pipeline, or equipment located on the seabed—sometimes thousands of meters below the surface. These leaks can continue for days or even months before being contained, depending on the depth and severity. Causes o