US 12,312,905 B2
Methods, apparatus and systems for creating wellbore plugs for abandoned wells
Terizhandur S. Ramakrishnan, Boxborough, MA (US); Hua Zhang, Cambridge, MA (US); Quincy K. Elias, Hyde Park, MA (US); and Albert Perez, Jr., Brookfield, CT (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
Filed on May 8, 2023, as Appl. No. 18/313,423.
Application 18/313,423 is a continuation of application No. 17/045,313, granted, now 11,643,902, previously published as PCT/US2018/034418, filed on May 24, 2018.
Claims priority of provisional application 62/652,015, filed on Apr. 3, 2018.
Prior Publication US 2023/0272689 A1, Aug. 31, 2023
Int. Cl. E21B 33/13 (2006.01); C09K 8/42 (2006.01); C09K 8/46 (2006.01); C22C 12/00 (2006.01); E21B 29/12 (2006.01); E21B 33/12 (2006.01); E21B 33/134 (2006.01); E21B 33/138 (2006.01); E21B 33/14 (2006.01); G01N 33/2028 (2019.01)
CPC E21B 33/13 (2013.01) [C09K 8/426 (2013.01); C09K 8/46 (2013.01); C22C 12/00 (2013.01); E21B 29/12 (2013.01); E21B 33/12 (2013.01); E21B 33/1208 (2013.01); E21B 33/134 (2013.01); E21B 33/138 (2013.01); E21B 33/143 (2013.01); G01N 33/2028 (2019.01)] 10 Claims
OG exemplary drawing
 
1. A formation plug formed in situ in a wellbore traversing a formation, comprising: a solid bismuth alloy material having a solid first cylindrical body portion;
a solid second cylindrical body portion of smaller diameter than the first cylindrical body portion;
a shoulder being defined at a transition from said first cylindrical body portion to said second cylindrical body portion; and
at least one continuous thread extending around and running along the first cylindrical body portion to the top of the first cylindrical body portion,
wherein the body portions, the shoulder, and the at least one continuous thread interface with a wall of the wellbore to form a seal with the wellbore and prevent displacement of said plug under differential pressures.