US 11,939,850 B2
Apparatus for TCA bleed off and well start-up
Mohamed Larbi Zeghlache, Al Khobar (SA); and Salem H. Suwadi, Khurais (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Jan. 7, 2022, as Appl. No. 17/647,394.
Prior Publication US 2023/0220753 A1, Jul. 13, 2023
Int. Cl. E21B 43/16 (2006.01); E21B 33/06 (2006.01); E21B 33/068 (2006.01); E21B 43/12 (2006.01); E21B 49/00 (2006.01); E21B 49/08 (2006.01)
CPC E21B 43/168 (2013.01) [E21B 33/068 (2013.01); E21B 43/123 (2013.01); E21B 49/008 (2013.01); E21B 49/088 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A treatment system, comprising:
a treatment bladder having a volume, a lower fluid junction, and containing a treatment fluid,
where the treatment fluid is at a pressure in a range of from about 90% to 110% of a pressure of a tubing-casing annulus of a wellhead system to be treated, and
where the volume is in a range of 80 to 120% of the volume of the tubing-casing annulus to be treated; and
a fluid conduit coupled to both the treatment bladder at the lower fluid junction and a tubing-casing annulus junction for a tubing-casing annulus of a wellhead system,
where the fluid conduit while coupled is configured to convey a fluid having a density less than the treatment fluid to traverse from the tubing-casing annulus to the treatment bladder and a fluid having a density equal to or greater than the treatment fluid to traverse from the treatment bladder tank to the tubing-casing annulus simultaneously and without any active mechanical assistance when selective fluid connectivity is established between the treatment bladder and the tubing-casing annulus, and
where the fluid conduit is rated to withstand both a pressure of at least a maximum allowable annular surface pressure (MAASP) of the tubing-casing annulus and a temperature of at least a maximum production fluid temperature.