2431 Kelly Ln. Houston, TX, 77066 Ph: (281)880-8833 Fax: (281)631-9140 www.drillingstructuresintl.com 17 October, 2023 Braserv Petroleo Rodovia BR - 101 - S/N, KM – 112 Polo industrial de, BA, Brazil RE: 36” x 12’ Mud Gas Separator To whom it may concern, Please let this correspondence serve as formal notification that Drilling Structures International, Inc. regarding the design and ratings of the 36” Mud Gas Separator located on your Rig 886 and 147. The tank itself is made of 36” STD Seamless Pipe, therefore the OD is 36”, ID is 35 ¼”, with 12’ of usable length. Flow rate on this tank is dependent on the mud equipment located on the rig, it can be up to 1200 gal/min if the rest of the mud equipment can reach those flow rates. The Mud Leg to the Opossum Belly is 11’-7” with a Vent line ID of 6”. If you have any questions, please feel free to contact me anytime. Sincerely, Phillip Rivera Jr. President Drilling Structures International, Inc.
