Several Shell drilling seniors were occupied with drilling and testing of equipment at Ullrigg for several years, amongst them were Andy Andersen, Pål Schilte and Albert Pols.
In 1987, drilling of the directional referance well "U2" was complete, drilled because the industry needed better qualification of the survey accuracy of the early directional drilling and logging equipment. Even today, U2 is often used for this purpose.
Other notable achivements made using Ullrigg include a full scale test of the Drilling equipment and Drawworks for Snorre A TLP, testing of the overshot for SAGA Petroleum's problem well in 1990, and several large MPD (Managed Pressure Drilling) projects.
Ullrigg has been continually developed and enhanced, with the last major upgrade consisting of a new Top Drive, a new Mud Pump, two new Shale Shakers and a fully remote operated TFM (Tubular Feeding Machine).