US 12,012,823 B2
Cement retainer for remedial operations
Marius Neacsu, Dhahran (SA); and Omar M. Alhamid, Dammam (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Mar. 25, 2022, as Appl. No. 17/705,101.
Prior Publication US 2023/0304375 A1, Sep. 28, 2023
Int. Cl. E21B 33/14 (2006.01); E21B 34/12 (2006.01); E21B 34/14 (2006.01)
CPC E21B 33/14 (2013.01) [E21B 34/14 (2013.01); E21B 2200/05 (2020.05); E21B 2200/06 (2020.05)] 20 Claims
OG exemplary drawing
 
19. A method of performing a remedial cementing operation, the method comprising:
lowering, with a tubing string, a cement retainer to a target zone of a wellbore comprising a casing, the cement retainer releasably and fluidly coupled to a downhole section of the wellbore string, the cement retainer comprising a bore defining a fluid pathway extending from a fluid inlet of the cement retainer to a fluid outlet of the cement retainer, the wellbore defining, between an external surface of the cement retainer and a wall of the casing, an annulus, the cement retainer comprising i) a valve residing at the bore and configured to restrict fluid from flowing uphole along the fluid pathway, the valve pivotable between a closed position, in which the valve blocks the fluid pathway, and an opened position, in which the fluid pathway is opened and the valve allows fluid to flow downhole along the fluid pathway, and ii) a packer configured to isolate, with the packer set on the wall of the casing, a first section of the annulus uphole of the packer from the target zone of the wellbore, the target zone of the wellbore downhole of the packer;
setting the packer on the wall of the casing;
stinging, with the tubing string, the cement retainer, opening the valve; and
flowing, with the tubing string extending past the valve and maintaining the valve open, cement from the tubing string to the target zone to remediate the wellbore at the target zone.