Zombie Capacity That Won't Clear: Behavioral Anchoring and Rigid Supply in Offshore Drilling, 2002–2025

Deep beneath the ocean, where the water is too deep for a ship to anchor, massive steel rigs drill for oil. These machines are not simple tools; they are among the most expensive and complex pieces of equipment on Earth, costing hundreds of millions of dollars to build and taking years to construct. Because they are so costly, the companies that own them operate on a simple, high-stakes logic: if the price of oil is high, they drill; if the price drops, they stop. For decades, the standard story told by bankers, policymakers, and industry experts was that when these drilling companies got into trouble, it was because the money stopped flowing. The narrative was that a credit freeze, like the one that happened in 2008 or the one in 2014, made it impossible for these companies to pay their loans, forcing them to idle their rigs and shut down. It was a story about a broken bank account.

However, a new study challenges this long-held belief by looking at the actual physical behavior of the rigs rather than just the bank statements. The researchers asked a different question: was the industry's decade-long struggle caused by a lack of money, or was it caused by having built too many rigs in the first place? To answer this, they had to look past the financial headlines and examine the daily operations of the drilling fleet. They focused on two specific things: how much money a rig was earning per day compared to the cost of keeping it running, and how often the rig was actually being used. The study suggests that the trouble began not when banks stopped lending, but when the supply of drilling machines vastly outstripped the demand for them, creating a glut that lasted for over a decade.

The researchers, led by Kang Lixue, spent years reconstructing a detailed history of the offshore drilling industry from 2002 to 2025. This was a massive undertaking because the industry is a shifting landscape of mergers, bankruptcies, and rebranding. Companies bought each other, split apart, and filed for protection from creditors, making it difficult to track a single piece of equipment over time. The team built a custom database that followed ten major drilling contractors, stitching together their records to create a continuous timeline of what happened to their fleets. They did not rely on the companies' financial reports, which can be adjusted or obscured by accounting tricks. Instead, they looked at the hard data: how many days a rig sat idle, what percentage of the fleet was working, and the daily rate charged to drill a well.

When they analyzed this data, they found a pattern that did not fit the story of a credit crisis. In the two biggest downturns, in 2009 and 2014, the companies were actually charging record-high prices for their services. In the third quarter of 2009, for example, the daily rate for a major rig was more than $150,000 above the cost of keeping it running. In early 2014, that gap was even wider, exceeding $177,000. If the problem had been a lack of money or a collapse in prices, these numbers would have been low or negative. Instead, the prices were healthy. What had collapsed was the usage. The percentage of rigs actually working dropped sharply, falling from over 90% to roughly 75% or 78%. The machines were not idle because they couldn't afford to work; they were idle because there were simply too many of them and not enough work to go around.

The study shows that this overcapacity was not a temporary glitch but a structural problem that persisted for roughly twelve years. The researchers found that in the vast majority of the time the industry was in distress, the credit markets were actually functioning normally. The data revealed that more than 96% of the periods where rigs were sitting idle occurred when credit was available and interest rates were stable. The financial stress that eventually hit some of the most heavily indebted companies was a secondary effect, a lagging consequence of the physical glut, not the cause of it. When the price of oil dropped, demand for drilling fell immediately, but the supply of rigs could not shrink quickly because building a new one takes three to five years, and once built, a rig cannot be easily dismantled. This created a situation where the fleet was stuck, waiting for demand to catch up with a supply that had been locked in years earlier.

A key part of the discovery involves how the people running these companies reacted to the downturn. The researchers propose that the industry suffered from a kind of stubborn optimism, or "anchoring." Even after the oil price crashed and the market clearly had too many rigs, the companies refused to scrap their expensive equipment. Instead, they kept the rigs in a state of "cold stacking," where they are shut down but kept ready to be restarted. The companies held onto these assets, hoping that prices would return to the record highs they had seen just a few years prior. This behavior, combined with the physical inability to quickly reduce the number of rigs, meant that the excess capacity remained in the water, suppressing the market for over a decade. The financial trouble that eventually forced some companies to restructure their debt was the result of this long, slow struggle with too many machines, not the spark that started the fire.

The study also highlights a critical flaw in how the industry and regulators have traditionally viewed these crises. By focusing on the financial statements and the credit ratings of the companies, the true nature of the problem was missed. The researchers argue that the industry's distress was a physical mismatch between supply and demand, not a banking failure. This distinction is vital because it changes the solution. If the problem is a lack of credit, the answer is to lend more money to keep the companies alive. But if the problem is that there are too many rigs, lending more money only delays the inevitable, keeping unneeded machines floating in the ocean and prolonging the industry's pain. The data suggests that the only way to clear the market is to accept that some of these massive assets must be retired permanently, a painful but necessary step to restore balance.

This research does not claim to have solved every mystery of the offshore drilling world. There are still gaps in the data, particularly regarding the specific financial details of some smaller or less transparent companies, which the researchers carefully noted as unknown rather than guessing. However, the evidence they did gather is robust and points in a single, clear direction. The industry's long struggle was not a story of a credit freeze killing a healthy business. It was a story of a boom that built too much capacity, followed by a decade of waiting for the market to absorb the excess. The financial crisis that followed was merely the bill arriving late for a party that had already ended. By shifting the focus from the bank account to the physical rig, the study offers a clearer, more honest picture of why the offshore drilling industry has been stuck in a deep freeze for so long, and what it might take to finally thaw it.