Superior Performance Delivered in Challenging 17-1/2” Section – UK Central North Sea
Challenging long, deviated 17 ½” section
Tertiary into Palaeocene transitions
Balder Tuff, Sele and Lista formations
17-1/2” EVOS™ 816 PDC
VENOM™ Cutter Technology (ARTIMIS™)
UK Central Offshore
The key objective was to drill the Tertiary and Palaeocene at sufficient ROP and trip in the Sele formation for a planned bit and BHA change. The Balder is known for harsh conditions, often causing significant PDC cutter damage.
The 17 ½” section in this application has always been drilled with multiple bit runs.
VES proposed the EVOS 816 bit with a unique and engineered cutting structure designed for optimum performance in challenging applications. The cutting structure was designed through a joint collaborative effort by VES, Aberdeen University and Oil & Gas Innovation Center (OGIC) Scotland.
The bit drilled further than planned and tripped in the Sele formation due to a BHA unrelated issue with clear pathway to drill much further.
Run inclination was 24°. The bit drilled 2,394m of Hordaland, Balder, Lista and Sele formations at an average ROP of 23m/hr.
The run saved two days drilling (Approximately $550K).
The EVOS platform delivered superior performance compared with relevant offset runs setting a new field record of 885m drilled per day.