With Noble Corporation (NYSE:NE) reporting a pause in deepwater drilling demand and an influential analyst predicting plunging demand in the sector, it's a good time to review the long-term case in the sector. Last week, SeaDrill (NYSE:SDRL) attended the SEB Nordic Seminar and reiterated a very bullish long-term case for offshore rigs. With the company's stock down over 20% in a few months, investors should consider the stock if one believes in the bull case.

SeaDrill is a leader in the deepwater drilling segment focused on building out a high specification fleet and returning large amounts of capital to investors. The company's stock currently yields over 10%.

One of the major dynamics since the Macondo explosion in the Gulf of Mexico is a preference for high-specification modern rigs. The demand equation is shifting toward high demand for new builds and a slack of demand for old rigs. In this scenario, a firm with new rigs can reach near 100% utilization while rigs over 30 years need to be retired. A firm on the wrong side of the age equation might find this to be a major obstacle. 

Short-term negatives
During its earnings release, Noble predicted that the market for offshore drilling was entering a short-term pause that should refresh the market. The company forecasted a large 7% gain in costs for 2014, suggesting that the segment needed a slowdown in demand in order for crews and suppliers to catch up. Management was of the opinion that a temporary period of weakness would improve the long-term outlook.

Barclays predicted that deepwater drillers could plunge 35% on average, though the prediction seems highly unlikely based on Brent crude prices above $105. The analyst predicts that dayrates for ultra-deepwater rigs will plunge to $475,000 with the average rates dropping 16%. The analyst also predicts the decline could send SeaDrill down 52%. In the scenario, Diamond Offshore (NYSE:DO) could plunge 45%, similar to SeaDrill.

Long-term supply imbalance
SeaDrill offers a contrary view, especially compared to the recent near-term bearishness. The company sees a global rig supply and demand imbalance over the next six years or so. The biggest part of the uncertainty and where most participants differ is on the level of rig retirements. In fact, SeaDrill sees such a massive imbalance that it expects a 189-rig shortage based on 2020 demand. The company sees the 60 new builds over the next three years only slightly exceeding the 50 rig retirements. That scenario leaves a shortage based on increased demand requiring over 45 rigs built in the remaining years up to 2020.

SeaDrill sees an even bigger issue with the jack-up market where the fleet continues to age dramatically. By 2020, more than 220 of the currently contracted jack-up fleet will be more than 35 years old.

Bottom line
These contrary views are difficult to balance. The major difference is the short-term versus long-term nature of the different calls. No matter how accurate SeaDrill might be regarding long-term supply and demand imbalances, the market is likely to go through several weak periods in those years. An investor in agreement with the long-term thesis should use the current weakness to invest in the sector and especially the companies aggressively building new rigs. The ride to long-term gains is never without bumps along the way.

Mark Holder has no position in any stocks mentioned. The Motley Fool recommends Seadrill. The Motley Fool owns shares of Seadrill. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.