Selected offshore drilling companies by revenue 2018-2021

Transocean Ltd is the largest offshore drilling contractor in the world. In 2021, the Switzerland-based company reported 2.56 billion U.S. dollars in revenues. Though this figure represents a significant decreaese compared to the previous year, it was still was over one billion more U.S. dollars than the amount generated by its nearest competitor – Valaris plc. Transocean is contractor to some of the largest oil producers worldwide – such as Royal Dutch Shell and Chevron. It was also owner of Deepwater Horizon, which had been leased to BP and was involved in the largest marine oil spill caused by the petroleum industry. Global rig fleet and the decommissioning marketOffshore rigs are facilities built to explore, extract, process, and store petroleum and natural gas from subsea formations. Some of the risks associated with such platforms are explosions, fires, ecological disasters, and endangerment of native marine species. As many stationary rigs will reach the end of their lifecycle and resources of previously productive oilfields are depleted, the market value of offshore decommissioning worldwide is expected to increase to 8.3 billion U.S. dollars by 2024. By comparison, the use of mobile rigs has become more common in recent years as they allow for more flexible usage. Valaris has the largest mobile offshore rig fleet of any company. At the end of 2020, the number of global offshore oil rigs stood at 173 units, compared with 843 units of land-based oil rigs.

Transocean Ltd 荣膺全球最大的海上钻井承包商。于2021年，这家总部位于瑞士的企业实现了25.6亿美元的营业收入。尽管这一数字与上一年度相比有所下降，但仍然高出其最接近的竞争对手——Valaris plc 一亿美元以上。Transocean 担任全球一些最大石油生产商的承包商，例如荷兰皇家壳牌和雪佛龙。此外，该公司曾是深水地平线（Deepwater Horizon）的所有者，该平台曾出租给BP公司，并涉及由石油工业引发的最大的海洋石油泄漏事件。海上钻井平台和退役市场海上钻井平台是专为在海底构造中勘探、提取、加工和储存石油和天然气而建造的设施。与这些平台相关的风险包括爆炸、火灾、生态灾难以及威胁本地海洋物种。随着众多固定式钻井平台步入生命周期的尽头，以及先前生产性油田的资源枯竭，预计到2024年，全球海上钻井平台退役市场的市值将增长至83亿美元。相比之下，近年来移动式钻井平台的使用变得更加普遍，因为它们允许更灵活的使用。Valaris 拥有业内最大的移动式海上钻井平台舰队。截至2020年底，全球海上石油钻井平台数量达到173座，而陆地石油钻井平台数量为843座。