As of 2025, there were ** high-spec, harsh environment semi-submersible rigs worldwide. By comparison, there were only *** drillships with a hook load of 1,700 short tons, both of which were owned by Transocean. Transocean is the largest offshore service provider by revenue in the world.
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Transocean. (June 16, 2025). Number of high-spec semi-submersible rigs and drillships worldwide as of 2025 [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 21, 2026, from /statistics/1621585/global-drillship-fleet/
Transocean. "Number of high-spec semi-submersible rigs and drillships worldwide as of 2025." Chart. June 16, 2025. ÌÇÐÄÆƽâ°æ. Accessed July 21, 2026. /statistics/1621585/global-drillship-fleet/
Transocean. (2025). Number of high-spec semi-submersible rigs and drillships worldwide as of 2025. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 21, 2026. /statistics/1621585/global-drillship-fleet/
Transocean. "Number of High-spec Semi-submersible Rigs and Drillships Worldwide as of 2025." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 16 Jun 2025, /statistics/1621585/global-drillship-fleet/
Transocean, Number of high-spec semi-submersible rigs and drillships worldwide as of 2025 ÌÇÐÄÆƽâ°æ, /statistics/1621585/global-drillship-fleet/ (last visited July 21, 2026)
Number of high-spec semi-submersible rigs and drillships worldwide as of 2025 [Graph], Transocean, June 16, 2025. [Online]. Available: /statistics/1621585/global-drillship-fleet/
