No Hands: The Well That Drilled Itself

Halliburton and ExxonMobil completed the world's first fully automated offshore well in Guyana, cutting drill time and setting a new industry benchmark

24 Mar 2026

Halliburton and ExxonMobil said on March 16 that they had completed what they described as the world's first fully automated, closed-loop well in a live offshore environment, using technology deployed in the deepwater fields of Guyana, one of the most productive hydrocarbon basins in the Western Hemisphere.

The operation, conducted with Norwegian drilling-software firm Sekal, rig operator Noble, and the Wells Alliance Guyana team, replaced the conventional system of separately managed geology, drilling, and rig functions with a single connected digital framework. Halliburton's LOGIX platform linked automated geosteering, which steers the drill through subsurface rock layers, directly to rig controls. Sekal's DrillTronics system handled real-time decision-making at the rig. The combined setup created a continuous feedback loop between sensors and the drill, keeping the wellbore within the target rock formation throughout.

The reservoir section was completed approximately 15% faster than planned. Tripping operations, in which the drill string is raised and lowered, finished around 33% ahead of schedule. Roughly 470 metres of lateral wellbore was placed inside the target formation during active drilling, a level of accuracy that operators say is difficult to replicate consistently through manual methods.

The commercial logic is straightforward. In offshore oil production, the proportion of a reservoir that can be accessed by a wellbore determines recovery rates. Drift outside the productive zone means oil left in the ground. Automated geosteering reduces that risk.

ExxonMobil's vice-president of wells, Rod Henson, described the result as a meaningful step for Guyana's energy development and the broader digitalisation of the industry. Halliburton's Jim Collins pointed to the integration of subsurface insight and automated rig control as the basis for a new standard in well construction.

The demonstration comes as operators across the sector face sustained pressure to reduce drilling costs and improve recovery efficiency. Whether the Guyana result can be replicated across the varied geology and operational conditions of other basins remains to be established.