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When Deadman could not prevent disaster

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Biggest marine oil spill in history

 

By Captain Chandra
Godakanda Arachchi
Member of Company of Master Mariners
Gladstone LNG (Oil and gas producer and exporter)

Deepwater Horizon (DH) was a semi-submersible drill rig, which operated in a depth of approximately 1600 metres in the Gulf of Maxico. On charter to British Petroleum (BP), it was drilling possibly to a depth of 2,600 metres below the seabed about 50 miles off the Louisiana coast, within the exclusive economic zone of the US when an explosion occurred on 10 April 2010, killing 11 and injuring 17; 94 workers on board were rescued.

Crude oil and natural gas from the DH well continued to flow post explosion for 87 days until BP finally managed to cap it on 15 July 2010 and shut the flow. Consequently, the incident caused an unprecedented spill (780,000 cubic meters of crude oil as per the government data) although BP mentioned a lower amount. Worse, an unestimable amount of gas escaped into the atmosphere. The accident took a heavy toll on marine life, shore birds, shorelines, beaches, etc., even beyond the Gulf of Mexico. Dolphins, tuna, turtles, etc., died in large numbers. BP took up the challenge of cleaning up the mess, spending huge amount of dollars. Extensive cleaning continued for four long years. BP established a fund, the Gulf Coast Claims Facility with US$ 20 billion, to settle the claims.

The amount of crude oil that escaped from DH well is about 19 times what gushed out of the tanker, Exxon Valdez, which grounded in Alaska in 1989. This amount would have been sufficient for the Sapugaskanda Refinery for more than 100 days.

What went wrong on the fateful day? Here is what is thought to have happened!

Drilling an oil well is a highly skilled and specialised work. Once the site is determined for drilling post seismic surveys of the area, then a drilling rig is assembled at the correct location with all required material including safety gear. Drilling rigs use pipes which are about 20 metres in length, join these together as the drill head finds its way down. Drilling involves creating a flow path (deep hole or a well bore) under reservoir pressure thousands of meters below earth surface. The drill head can pass through various layers of earth crust, which can contain oil, gas and water under pressure, and this can lead to a dangerous unplanned release of oil and gas (or ‘kicks’). If a “kick” is not arrested in time, it can lead to a blowout of oil and gas from the well. In order to control such ‘kicks’, there is a specific piece of safety equipment known as “blowout preventer (BOP), installed close to the seabed, fitted on a larger pipe connected to the rig. Essentially, the drill pipe which is smaller is located inside this larger pipe. The space between the larger pipe and the drill pipe is called the annulus. In order to arrest unplanned ‘kicks’ in the first instance, drilling mud is pumped into the annulus space to create a barrier between the reservoir and the rig pipe work. BOP is used for emergency shutdown (ESD) in case drilling mud fails to arrest the ‘kicks’. The BOP, a complex piece of safety equipment operated electrically under hydraulic pressure, consists of additional layers of protection, depending on the level of the emergency. It will be curtains for the well bore if the last line of defence, “Deadman” is activated as it effectively seals the annulus and the drill pipe completely. Deadman is, therefore, used only as a last resort.

On 20 April, 2010 it was yet another evening for the crew on DH. They had to contend with various operational matters in the process of drilling the wellbore at Mundo Prospect. They were drilling in 5,000 feet of water, a depth not easy at all to reach for any emergency work. There was an undetected ‘kick’ occurring at 2045 hrs with oil and gas moving quickly up the annulus to the rig with 126 crew members on board. Oil and gas pressure was forcing the drill mud on to the rig at 2140 hrs. The crew responded by activating the upper annulus preventer in the BOP. However, activation of BOP did not seal the well, and oil and gas continued to gush out. The crew then responded by closing the pipe shear ram (hydraulic rams crushing the outer pipe to get a seal). Pipe shear rams appeared to have sealed the annulus successfully although that turned out to be only a temporary fix. Oil and gas continued to flow above the rams, which eventually found an ignition source at 2149 hrs, causing an explosion on the rig. As the rams had partially blocked the annulus the pressure above them beginning to drop, creating a big pressure differential between the drill pipe and the annulus. The drill pipe shut from the top at the time was subject to pocket pressure. Investigators believe that huge differential pressure may have contributed to buckling (or bending) of the drill pipe in the centre, thereby shutting mechanisms and rendering them ineffective as rams could not reach the shut-off position. This proved to be catastrophic. Investigators have expressed concern that existing rigs may face similar situations.

Deadman can be operated manually by the crew as a last report or it gets activated automatically when conditions for such activation occur like the loss of main power, hydraulic pressure and communication for the logic controller to send the output (signal) to activate the mechanism. The rig had lost power due to the explosion, and hydraulic pressure owing to the disruption of the hydraulic pressure units, which were probably damaged due to the explosion, thereby causing a loss of pressure. Communication to Deadman from logic controller was also lost. Deadman has a separate logic controller though it is linked to the main logic controller all the time whilst monitoring the conditions and remaining ready for automatic activation if required. Deadman, when activated, under right conditions essentially crushes the pipe work thereby sealing the well bore completely.

Deadman is operated not by main power but by uninterrupted power supply (UPS -battery backup) with 27V and 9 V batteries to power emergency functions and operate shear ram blades. In fact, there is a secondary back-up system (redundant system) for shear rams emergency shutdown as well. But the investigators found evidence to suggest that this vital piece of equipment to be used as a last resort had been wrongly wired and did not function. One system of Deadman shear ram blades got activated, but it faced the problem of the buckled pipe line and could not seal the pipeline completely. If the pipeline not been bucked, the shear ram blades would have greatly reduced the impact of the incident. There was nothing else to stop the massive oil spillage and destruction of the rig.

DH continued to burn for two days before sinking. Crude oil and gas from the well bore continued to pollute the Gulf of Mexico for 87 days. Emergency shutdown systems (ESD), whether on a rig, ship or in any other plant in operation are very important equipment; they must be maintained and tested regularly as required, if disasters like the aforesaid one are to be averted.



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‘The devil is in the details’ in West Asian peace

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President Donald Trump at the current G7 summit in France. Evelyn Hockstein/Getty Image

It is obviously too early for an outpouring of joy over the seeming cessation of hostilities between the main antagonists in West Asia. While the prospect of there being a measure of calm in the region is being welcomed by considerable sections of the international community, what is ‘on the table’ currently is only a Memorandum of Understanding between the US and Iran to give peace a chance. The hard part in the peace effort remains to be achieved.

In the Middle East of today we have one of the most complex conflicts to break out in modern international politics and the observer would be naive in the extreme to expect a facile and early closure to the tangle. Yet, for the sake of the world’s publics who have been hurting badly in the prolonged hostilities one could only hope that the US-Iran MoU that is expected to be signed by the sides on Friday would lead eventually to a substantive peace. The world’s thanks are due to Pakistan in this connection for its sustained support in the peace drive.

While the sides have agreed to a ceasing of hostilities in the most general terms and have reached accord on the facilitation of uninterrupted oil and gas supplies to the rest of the world, for instance, the ‘devil will prove to be in the details’ in an envisaged comprehensive peace settlement. It is these details that would make or break peace if the negotiations go on in earnest.

Nevertheless, the details would need to be worked out consensually in a spirit of compromise with an eye to the greater good of the world community. Realpolitik or a narrow focus on solely the national interest among the protagonists, for example, would need to give way to a measure of humanity that would encompass within it a consideration of the overall well being of the world. In other words, it is statesmanship that would crucially matter.

The next few weeks would establish whether humanists are ‘asking for far too much’ when they broach the questions at issue in these terms. Yet it is essentially self interest and national security considerations of the first importance that drove the conflict from even prior to February this year and these questions would need to be taken up and resolved to the satisfaction of the US and Iran in the main if some headway is to be made towards a durable settlement.

The nuclear issue would prove to be the proverbial Gordian Knot. From a realistic viewpoint, Iran could not be expected to be without a potential nuclear deterrent in the face of perceived nuclear threats emanating for it from the West and Israel. In the short term, Iran would need to possess this deterrent to a measure, within a mutually agreed international legal framework maybe, until wide agreement is reached on the nuclear tangle. Specifically, Iran’s immediate threat perceptions with regard to her nuclear-powered rivals would need to be defused during initial negotiations.

Ideally it is a world free of nuclear weapons that must be aimed at but since this goal cannot be achieved in the near or medium terms, unfolding negotiations would need to ensure Iran’s absolute security in a world of powers that continue to swear by the nuclear deterrent, if it is to give up the suspected latter capability.

However, it is to the degree to which the present nuclear powers divest themselves of this capability that Iran could be put at ease on this score. Accordingly, it is nothing short of a complete elimination of nuclear weapons from the world that could dissuade keenly security conscious states from developing nuclear weapons of their own with a mass destruction capability.

This is the number one dilemma the international community needs to grapple with going forward and it is to the extent to which it resolves it that a nuclear weapons free world could be envisaged. No doubt, an uphill challenge.

Compelling Israel to support the present negotiatory process constitutes another grueling challenge for the US. Currently the Iranian position essentially is that a Middle East peace is inseparable from a normalization of the security situation in Lebanon. That is, the present Israeli attacks on the Hezbollah presence in Lebanon must cease if a comprehensive peace is to be realized in West Asia.

However, Israel is showing no signs of drawing back from its attacks on Hezbollah strongholds in Lebanon since the security of the Israeli state is being seen as threatened by the militant group. Co-opting Israel into the negotiatory effort therefore would turn out to be a matter of paramount concern for the US.

Moreover, elements in the rightist administration in Israel are seeing the current peace efforts as a ‘sell out’ to the enemies of Israel. They would have none of it. It is left to be seen how the US would be managing these virtual storm centres in the diplomatic process that could very well bring down the overall purported peace drive.

A recent pronouncement by US Vice President J.D. Vance points to yet another problem area in the US’ current peace overtures. He said that, ‘Regional peace and stability includes stopping the funding of terrorist organizations.’ He was obviously referring to the support extended by Iran to Hezbollah when he mentioned ‘terrorist organizations’ but he has given fresh life to the age-old conundrum of ‘Who is a terrorist?’ by these words.

To the Netanyahu government the Hezbollah and other militant organizations fighting Israel are ‘terrorists’ but from the viewpoint of the Iranian regime they are ‘freedom fighters’. This seemingly insurmountable definitional issue would not only stubbornly bedevil the peace effort but could even figure in bringing about its collapse, unless judiciously handled.

Thus, it’s the thorny details that need to be watched to keep the West Asian peace process afloat, once it gets going in earnest. There is no doubt that US President Trump would be receiving a considerable amount of support from the G7 in this historic peace undertaking and his personal appeals to the grouping currently meeting in France for continuous support are likely to elicit a positive response from it.

Likewise, Trump would need to appeal to also the BRICS countries if almost total global support is to be garnered for the peace drive in West Asia. BRICS’ solidarity with the US and the West is likely to carry considerable weight with Iran and other Eastern actors who are key to a sustained peace drive in the Middle East.

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Sri Lanka’s elephant paradox: Govt. counts tourism dollars while playing a dangerous numbers game: Expert

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At a time when Sri Lanka is enjoying a resurgence in wildlife tourism, with elephants remaining the undisputed stars of the country’s national parks and one of its most marketable natural assets, elephant conservationist Supun Lahiru Prakash has sounded a stark warning: the nation is in danger of losing the very species that helps attract millions of tourism dollars while sustaining some of the island’s most important ecosystems.

Supun says repeated claims by authorities that Sri Lanka’s elephant population is increasing, despite the absence of a final survey report and amid continuing elephant deaths, risk creating a misleading narrative that could undermine conservation efforts and encourage retaliation against elephants.

According to Supun, the issue is not merely about numbers. It is about political priorities, scientific credibility and the future of one of Sri Lanka’s most iconic species.

“Repeatedly claiming that the elephant population is increasing appears to be an attempt to hide the Government’s inability to manage the rising annual elephant death rate and the complications of human-elephant conflict,” Supun said.

For decades, the Sri Lankan elephant has been a symbol of the country’s rich natural heritage. It is the centrepiece of wildlife tourism, drawing visitors from across the globe to national parks such as Yala, Udawalawe, Minneriya, Kaudulla and Wilpattu. International wildlife documentaries, tourism campaigns and social media promotions frequently place elephants at the heart of Sri Lanka’s nature tourism brand.

Yet, according to Supun, the country’s conservation policies do not reflect the value of the species.

“On one hand, the Government is enjoying increasing tourism revenue, and elephants remain one of Sri Lanka’s most important wildlife attractions. On the other hand, narratives are being promoted that could encourage retaliation against the very species that contributes significantly to the country’s tourism industry,” Supun said.

According to the First Countrywide National Survey of Elephants conducted in 2011, Sri Lanka had 5,879 elephants. However, official statistics show that 4,167 elephants died between 2012 and 2024.

Supun stressed that these figures represent only the deaths officially recorded by the Department of Wildlife Conservation.

“In a context where more than 70 percent of the country’s elephant population reported in 2011 has died within 13 years, it is difficult to accept claims that the population has increased,” Supun said.

The conservationist pointed out that elephants have the longest gestation period among land mammals and that scientific studies have reported increasing interbirth intervals among female elephants together with high calf mortality.

“When such biological realities are taken into consideration, claims of a dramatic increase in elephant numbers become difficult to understand,” Supun said.

Supun believes that repeated references to increasing elephant populations risk fuelling public hostility towards elephants, particularly among farming communities already affected by crop raids and property damage.

“Such claims can create the impression that elephant populations are exploding and thereby promote retaliation against elephants as well,” Supun said.

According to Supun, Sri Lanka’s elephant crisis cannot be understood solely through population estimates. The real issue lies in the country’s failure to address human-elephant conflict through long-term, science-based solutions.

Sri Lanka continues to record among the highest levels of human-elephant conflict in the world. Every year, hundreds of elephants and dozens of people lose their lives as competition for land and resources intensifies.

Despite the scale of the crisis, Supun says authorities continue to rely on strategies that have repeatedly failed.

Lahiru Prakash

These include driving elephants into protected areas, strengthening electric fences to confine them there and allocating additional manpower to maintain fencing systems.

Supun was also critical of several proposals that emerged from district-level discussions on conflict mitigation, including the sowing of paddy and corn using Air Force drones and the planting of fruit orchards within protected areas.

“Such proposals fail to address the real ecological and social dimensions of the conflict,” Supun said.

While welcoming reports that the Government intends appointing a national-level mechanism to tackle human-elephant conflict, Supun said the challenge required intervention at the highest level of government.

“Given the gravity, complexity and geographical spread of human-elephant conflict, appointing any committee other than a Presidential Task Force is not useful,” Supun said.

He argued that a Presidential Task Force chaired by either the President or the Secretary to the President would be better positioned to overcome the bureaucratic delays and institutional fragmentation that have hindered previous efforts.

Supun also stressed the urgent need to restore and protect elephant corridors and home ranges that allow elephants to move safely across landscapes.

He cited the Koholankala elephant corridor in Hambantota as one example where removing obstacles could help reduce conflict while improving habitat connectivity.

At the same time, Supun questioned policies that permit the allocation of forest lands in areas identified by environmental assessments as crucial elephant ranges and movement corridors.

“The opening of elephant corridors and the protection of elephant home ranges must be carried out scientifically and consistently if they are to succeed,” Supun said.

Beyond tourism, Supun emphasised the ecological importance of elephants.

“Elephants are ecosystem engineers. Through their feeding habits and movements, they help maintain habitats that support numerous other species. In many ways, they create safer and healthier environments for wildlife,” Supun said.

According to Supun, protecting elephants means protecting entire ecosystems and the biodiversity upon which Sri Lanka’s wildlife tourism industry depends.

“By protecting elephants, we are also protecting the biodiversity that makes Sri Lanka one of the world’s premier wildlife tourism destinations,” Supun said.

As Sri Lanka seeks to expand tourism earnings and strengthen its reputation as a wildlife destination, Supun believes the country faces a defining choice: continue with policies that have failed to stem elephant deaths and human-elephant conflict, or embrace a science-based conservation strategy that safeguards both people and wildlife.

Without a fundamental shift in policy and political will, Supun warned, Sri Lanka risks losing not only one of its most iconic species but also the ecological and economic benefits that elephants continue to provide.

“The suffering of both farmers and elephants will only intensify unless meaningful action replaces rhetoric,” Supun said.

 

By Ifham Nizam

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Top Model of the World 2026

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Back-to-back victory for Colombia

Katherine Castaño of Colombia claimed the Top Model of the World 2026 crown, securing a historic back-to-back victory for her country. Angelica Sanchez of Puerto Rico was named first runner-up, and Eunice Deza of the Philippines finished as second runner-up.

Katherine was crowned by outgoing titleholder Natalia Garizabal Vera of Colombia.

Several special category awards, and subsidiary titles, were also presented during the Top Model of the World 2026 pageant.

These awards recognised excellence in modelling, peer support, and regional representation.

Primary Subsidiary Titles

Sri Lanka’s Netalie Withanage: Top 16 at
the grand finale

Miss Globe 2026: Valentina Tabares (Ecuador) — Awarded to the contestant who perfectly balances fashion modelling with traditional beauty queen qualities.

Queen of Europe 2026: Mia Danielle Williams (United Kingdom) — Given to the highest-ranking candidate from a European nation.

Special Awards Recognition

Audience Iconic Award: Charly (Dominican Republic) — Won via the official public online vote, granting her a fast-track direct entry into the Top 6.

Exotic Model of the World: Angel Emeka (Nigeria) — Awarded for exceptional editorial presence and strong runway performance.

Best Body Award: Thailand — Voted directly by fellow contestants at the Flow Spectrum Hotel. The highest-ranking runners-up for this category included Zambia, South Africa, Colombia, and Ghana.

Angelica Sanchez (Puerto Rico): 1st Runner-up

Final Placement

Winner: Katherine Castaño (Colombia)

1st Runner-Up: Angelica Sanchez (Puerto Rico)

2nd Runner-Up: Eunice Deza (Philippines)

Top 6 Finalists: Included contestants from the Dominican Republic, Romania, and Germany.

The pageant, known for focusing on professional modelling careers over just beauty, brought together 36 models from around the globe for two weeks of runway, photoshoots, and cultural events.

Sri Lanka’s Netalie Withanage walked among 36 of the world’s best and powered her way into the Top 16 at the grand finale.

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