US 11,808,094 B2
Flexi-string for washout below a casing shoe
Sanjiv Kumar, Udhailiyah (SA); and Muhammad Imran Javed, Abqaiq (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on Sep. 3, 2021, as Appl. No. 17/466,468.
Prior Publication US 2023/0070661 A1, Mar. 9, 2023
Int. Cl. E21B 17/10 (2006.01); E21B 17/14 (2006.01)
CPC E21B 17/1078 (2013.01) [E21B 17/14 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system for a washout section located below a casing shoe of a well, the system comprising:
a tubular made of polymeric material having a first lateral end, a second lateral end, and an outer diameter, wherein the outer diameter defines an outer circumferential surface, and the outer diameter is smaller than an inner diameter of the casing shoe;
an anchor disposed on the outer circumferential surface of the first lateral end, wherein the anchor interacts with the casing shoe, or a last joint of casing, to hold the first lateral end of the tubular within the casing shoe;
centralizers located between the first lateral end and the second lateral end of the tubular and disposed circumferentially around the outer circumferential surface of the tubular, wherein the centralizers are configured to center the tubular within the casing shoe and the washout section; and
a roller guide, fixed to the second lateral end of the outer circumferential surface of the tubular, for lowering the tubular inside the casing shoe and to a depth below the washout section of the well.