US 12,345,114 B2
Annular blow out preventer
Alagarsamy Sundararajan, Sugar Land, TX (US); Subhra Dey, Sugar Land, TX (US); and Aravindhan Rajamarthandan, Sugar Land, TX (US)
Assigned to SRI ENERGY, INC., Sugar Land, TX (US)
Filed by SRI ENERGY, INC., Sugar Land, TX (US)
Filed on Oct. 1, 2024, as Appl. No. 18/903,594.
Claims priority of provisional application 63/542,792, filed on Oct. 6, 2023.
Prior Publication US 2025/0116167 A1, Apr. 10, 2025
Int. Cl. E21B 33/06 (2006.01)
CPC E21B 33/062 (2013.01) 19 Claims
OG exemplary drawing
 
1. A blow out preventor (BOP) comprising:
a first piston including a central channel that traverses the first piston;
a second piston including a central channel that traverses the second piston;
a resilient ring including a central channel that traverses the ring; and
a body that includes a central channel, the ring, and the first and second pistons;
wherein the channels of the body, the ring, and the first and second pistons align with each other;
wherein the ring is between the first and second pistons and includes: (a) an upper surface that tapers inwards as the upper surface extends upwards towards the first piston; (b) a lower surface that tapers inwards as the lower surface extends downwards towards the second piston; (c) first and second upper slots on the upper surface and first and second lower slots on the lower surface; and (d) a first metal bar included in both of the first upper and lower slots and a second metal bar included in both of the second upper and lower slots.