On 10th Feb 2022 @ around 15:15hrs while intending to Rig down BOP the Derrickman intended to release and raise the BOP hose, once he stepped on the middle cellar grating, the cellar grating slipped and he fell with cellar grating into cellar pit (1.4 m) resulted him to hit the wellhead, the IP immediately was taken to Sahara clinic for checks then referred to HAIMA Hospital for further X-ray and than referred to NIZWA Hospital for further investigation.