Indemnity during Petroleum Operations. Subject to and expressly limited by Sub-articles 25.3, 25.4 and 25.6, Contractor shall release and indemnify Staatsolie and its Affiliates and their respective consultants, agents, employees and directors from, and hold harmless Staatsolie and its Affiliates against all losses, damages, liabilities, costs and expenses arising under any claim, demand, action or proceeding instituted against Staatsolie or its Affiliates or their respective consultants, agents, employees or directors for any death, expense, injury, liability, loss or damage of any kind incurred or sustained in connection with or arising out of the activities of Contractor or its Sub-Contractors in respect of Petroleum Operations under this Contract.