Cokal Ltd (ASX:CKA) has signed an agreement with Indonesian mining services company PT Petrosea TK which will enable it to ramp-up production from the Bumi Barito Mineral (BBM) metallurgical coal mine in the same country in the near term. The deal (or ‘Term Sheet’) – signed between Cokal’s 60% owned subsidiary PT Bumi Barito Mineral and the major Indonesian player – will bring on contractor and vendor management services to facilitate operation expansion and increased production from the mine, which is located in the Central Kalimantan Province. Cokal is expecting lower production costs per to…