A PDO Operator along with his assistant was to operate a valve on casing which was at a depth of 1.2 meter from the ground level for re-commissioning of the well. While removing a section of the grating frame, the assistant operator stepped on an unstable frame, lost his balance and fell forward into the cellar which is 2.4 meter deep. As a result of falling the assistant sustained head injury (Trauma). Operator called Bahja operations for rescue support. Meanwhile he managed to get support from the nearby Well Pulling Hoist to rescue him from the cellar. Later on he was medevac to Haima hospital by PDO ambulance for further treatment.