US 12,031,405 B2
Self-setting plug
Ali Ssafwany, Safwa (SA); Ali S. Al-Mashhad, Al-Bustan (SA); and Rakan Al Yateem, Majidiyah (SA)
Assigned to SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed by SAUDI ARABIAN OIL COMPANY, Dhahran (SA)
Filed on May 11, 2022, as Appl. No. 17/662,962.
Prior Publication US 2023/0366290 A1, Nov. 16, 2023
Int. Cl. E21B 33/13 (2006.01); E21B 31/12 (2006.01)
CPC E21B 33/13 (2013.01) [E21B 31/12 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A plug for wellbore tubing, the plug comprising:
an internal portion;
a first external portion which surrounds the internal portion; and
a second external portion disposed axially adjacent to the first external portion, with respect to a central longitudinal axis of the plug;
wherein the second external portion expands to:
engage an interior surface of the wellbore tubing in response to a trigger as the plug displaces downhole through the wellbore tubing; and
create an annular gap between the second external portion and the internal portion to permit a fluid to progress in an uphole direction to the first external portion;
wherein the first external portion expands to engage the wellbore tubing in response to the expansion of the second external portion and upon contact with the fluid.