In a landmark achievement, Oil and Natural Gas Corporation Limited (ONGC) has successfully completed the capping operation at Well RDS#147A, located in Rudrasagar (RDS), bringing an end to a complex and challenging gas blowout situation. The event, which began on 12 June 2025, when gas suddenly gushed out during service operations, triggered an immediate and robust response by ONGC’s Crisis Management Team (CMT), backed by local experts and international specialists.

The incident at RDS#147A had the potential to escalate into a serious crisis, but ONGC’s proactive planning, precision engineering, and effective collaboration ensured that the situation was contained safely and efficiently. The blowout, involving an uncontrolled release of gas, necessitated the removal of the damaged Blowout Preventer (BOP) from the wellhead, a highly sensitive and dangerous task.

On 27 June 2025, the final capping operation was completed, marking a significant milestone for ONGC. The task began at dawn, with the CMT supported by experts from CUDD Pressure Control and local field teams. With careful coordination, the damaged BOP was safely lifted off the wellhead. This step required delicate balancing to avoid any instability or collapse during the operation.

Once the BOP was successfully removed, the pre-positioned capping stack, which had been meticulously prepared in the staging area, was accurately aligned and installed onto the wellhead. This step redirected the gas flow safely to the top of the capping stack, effectively bringing it under control.

The capping stack was firmly secured, and with the BOP closed, the gas discharge was completely halted, officially concluding the immediate emergency. This accomplishment is a testament to ONGC’s engineering capabilities, planning accuracy, and teamwork under pressure.

One of the most commendable aspects of the operation was the zero-harm outcome. The entire process, from the day of the blowout to the final capping, was conducted without a single injury, fatality, or incident of fire, reinforcing ONGC’s commitment to safety and operational excellence.

The RDS#147A operation also stands out for its transparency. ONGC maintained full disclosure throughout the operation, issuing daily press releases to keep stakeholders, including the public, government authorities, and media, informed about every stage of the operation. The final communication issued on 27 June 2025 marks the official closure of all field updates concerning the RDS#147A well incident.

In its official statement, ONGC expressed deep gratitude to all entities that contributed to the success of this challenging mission. The organization thanked the District and State Administration, the Ministry of Petroleum and Natural Gas (MoPNG), and the local community for their unwavering support, coordination, and cooperation. Their contributions were pivotal in ensuring a safe, efficient, and timely resolution to a potentially hazardous scenario.

The technical brilliance of ONGC’s Crisis Management Team, in collaboration with CUDD Pressure Control, was central to the safe execution of this complex procedure. Working under extreme pressure and within strict timelines, the teams displayed a rare blend of expertise, coordination, and grit, successfully mitigating a highly dangerous situation.

Beyond the technicalities, this operation reflects the spirit of resilience and responsibility that defines ONGC. The success at RDS#147A not only reaffirms the company’s capabilities in handling emergency well control but also sets a new benchmark for safety and preparedness in the Indian energy sector.

As part of the post-capping phase, ONGC will now initiate further steps under its well control roadmap, following standard operational protocols. These steps may include pressure monitoring, cementing, and eventual restoration of the site, as per environmental and safety regulations.

The incident at Rudrasagar Well RDS#147A, though unexpected, has become a narrative of ONGC’s engineering excellence, risk management, and commitment to operational integrity. It highlights the importance of having a trained response force, advanced equipment, and systematic communication in crisis scenarios within the oil and gas industry.

Looking ahead, ONGC has reiterated its dedication to upholding the highest standards of environmental stewardship, employee safety, and technical innovation. The company continues to be a pillar of India’s energy infrastructure, delivering results not just in exploration and production, but also in emergency management and sustainability.

This successful capping operation enhances ONGC’s global reputation as a reliable and responsible upstream oil and gas company. It will be remembered as a shining example of how preparedness, professionalism, and partnership can turn a potentially disastrous event into a story of triumph and learning.

The RDS#147A operation will undoubtedly serve as a case study for future crisis responses, not just in India but across international oil and gas communities. The operation concludes with a profound sense of achievement and the knowledge that when faced with adversity, ONGC’s teams rise to the challenge—quietly, effectively, and without compromise.

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