Proposals are due by January.

The number of sets required represents half of Iran’s estimated annual needs. Each set consists of a dozen to 20 units with different functions.

There are a handful of ­local manufacturers, for example Persian Energy Development Company (PED-Co), which claim to be observing international standards — PED-Co ­carried out reverse engineering on Halliburton tubing.

Most local providers copy or import Chinese tubing, which NIDC excludes.

The