US 12,129,734 B2
Back-up ring system for elastomeric sealing elements
Richard James Windslow, Richmond, TX (US); Travis Wernecke, Alvin, TX (US); Mikhail Gotlib, Houston, TX (US); Henghua Jin, Sugar Land, TX (US); and Karen Braden, Pearland, TX (US)
Assigned to SCHLUMBERGER TECHNOLOGY CORPORATION, Sugar Land, TX (US)
Appl. No. 18/260,490
Filed by Schlumberger Technology Corporation, Sugar Land, TX (US)
PCT Filed Dec. 22, 2021, PCT No. PCT/US2021/064959
§ 371(c)(1), (2) Date Jul. 6, 2023,
PCT Pub. No. WO2022/154952, PCT Pub. Date Jul. 21, 2022.
Claims priority of provisional application 63/136,623, filed on Jan. 12, 2021.
Prior Publication US 2024/0060386 A1, Feb. 22, 2024
Int. Cl. E21B 33/12 (2006.01); E21B 33/128 (2006.01); F16J 15/18 (2006.01)
CPC E21B 33/1216 (2013.01) [E21B 33/1208 (2013.01); E21B 33/128 (2013.01); F16J 15/18 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A back-up ring system, comprising:
an outer C-ring;
an inner C-ring that mates with the outer C-ring, the inner C-ring comprising a first rupture point; and
a ring sheath that fits onto the inner C-ring, the ring sheath comprising:
a cut-out region; and
a second rupture point,
wherein the inner C-ring further comprises a blocking segment that angularly offsets the first and second rupture points,
wherein the cut-out region of the ring sheath mates with the blocking segment of the inner C-ring,
wherein the ring sheath further comprises a ‘7’ shaped cross-sectional profile, and
wherein a lower branch of the ‘7’ shaped cross-sectional profile is tapered.