Patent ID: 11891878
Assignee: NINE DOWNHOLE TECHNOLOGIES, LLC
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 5:
6. The barrier valve of claim 1, wherein:
the cartridge comprises a groove in its outer surface for receiving and retaining the first elastomeric member and a first backup ring between the outer surface of the cartridge and the inner surface of the housing; and
the cartridge comprises a groove in its inner surface for receiving and retaining the second elastomeric member and a second backup ring between the outer surface of the frangible disc and the inner surface of the cartridge, the backup rings configured to respectively resist the elastomeric members extruding into gaps between the outer surface of the cartridge and the inner surface of the housing and between the inner surface of the cartridge and the outer surface of the frangible disc.