US 11,988,054 B2
System and method utilizing ball seat with locking feature
Samuel Roselier, Bruz (FR); Romain Neveu, Bruz (FR); Julie Leduc, Bruz (FR); and Francois Bajart, Bruz (FR)
Assigned to Schlumberger Technology Corporation, Sugar Land, TX (US)
Appl. No. 17/905,689
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Mar. 5, 2021, PCT No. PCT/US2021/021030
§ 371(c)(1), (2) Date Sep. 6, 2022,
PCT Pub. No. WO2021/183379, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 20305260 (EP), filed on Mar. 13, 2020.
Prior Publication US 2023/0084218 A1, Mar. 16, 2023
Int. Cl. E21B 23/04 (2006.01)
CPC E21B 23/0413 (2020.05) 20 Claims
OG exemplary drawing
 
1. A system for use in a well, comprising:
a well string sized for deployment along a borehole, the well string having a tubular section with an interior surface defining an internal flow passage; and
a ball seat mounted in the well string along the internal flow passage, the ball seat comprising:
a ball entrance sloping radially inwardly from the interior surface;
a base; and
a throat section having an interior throat surface which tapers to a smaller diameter in a downhole direction, the throat section extending between the ball entrance and the base to form a space between the interior surface and the throat section, the throat section being formed of a ductile material which is plastically deformable such that the throat section expands radially outwardly when receiving a ball with a larger diameter than the throat section, the ductile material having sufficient spring back to capture the ball on both an uphole side and a downhole side.