SHANA -- Iranian experts at the National Iranian South Oil Company (NISOC) managed to acquire the technical savvy for production of extra-heavy drilling mud for the first time in the country.

According to the company, Ahmad Mohammadi, NISOC CEO, said the mud, weighing 174pcf, was produced for drilling operations in Bibi Hakimeh Field.

He said the heaviest drilling must is 164 pcf but a heavier mud was needed in the operation to withstand pressures beyond 2400 Psi.

Calculation of the mud weight is vital to prevent blowouts in drilling operations, Mohammadi added.