US 12,297,715 B2
Concentric smart well completion
Ahmed A. Al-Ramadhan, Dammam (SA); Ahmed Abdullah Al-Mousa, Dhahran (SA); and Marius Neacsu, Dhahran (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on May 11, 2023, as Appl. No. 18/316,101.
Prior Publication US 2024/0376799 A1, Nov. 14, 2024
Int. Cl. E21B 34/16 (2006.01); E21B 43/14 (2006.01); E21B 33/12 (2006.01); E21B 43/12 (2006.01)
CPC E21B 34/16 (2013.01) [E21B 43/14 (2013.01); E21B 33/12 (2013.01); E21B 43/122 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method for producing fluids from a wellbore drilled into a subterranean zone from a surface of the Earth, the subterranean zone comprising at least an upper production zone and a lower production zone, the method comprising:
disposing a tubular production string in the wellbore, the tubular string comprising:
an upper string portion and a lower string portion, an inner diameter of a central bore of the upper string portion greater than an inner diameter of a central bore of the lower string portion;
a crossover assembly joining a downhole end of the upper string portion with an uphole end of the lower string portion, the crossover assembly comprising a seal receptacle configured to receive a downhole end of a tubular isolation insert having an outside diameter less than the inner diameter of the central bore of the upper string portion;
an upper interval control valve (ICV) positioned on the production string;
a lower ICV positioned on the production string downhole of the upper ICV;
positioning the production string within the wellbore such that the upper ICV is proximate an upper production zone perforation and the lower ICV is proximate a lower production zone perforation;
after disposing the production string in the wellbore, disposing a tubular isolation insert within the central bore of the upper string portion and inserting a downhole end of the tubular isolation insert into the seal receptacle of the crossover assembly, thereby forming an interior annular volume defined at least in part by:
an inner surface of the central bore of the upper string portion;
an outer surface of the tubular isolation insert; and
the seal receptacle; and
after inserting downhole end of the tubular isolation insert into the seal receptacle:
opening the upper ICV, thereby permitting a flow of fluids from the upper production zone through the upper ICV to the surface through the interior annular volume; and
opening the lower ICV, thereby permitting a flow of fluids from the lower production zone through the lower ICV to the surface through a central bore of the tubular isolation insert via the central bore of the lower string portion without commingling with fluids flowing through the upper ICV.