US 12,352,125 B2
Combined sealing member for coiled tubing blowout preventer box
Guangming Huang, Guangdong (CN); Jialiang Wang, Guangdong (CN); and Houning Li, Guangdong (CN)
Assigned to Guangzhou JST Seals Technology Co., Ltd., Guangzhou (CN)
Filed by Guangzhou JST Seals Technology Co., Ltd., Guangdong (CN)
Filed on Apr. 6, 2023, as Appl. No. 18/131,363.
Claims priority of application No. 202222693932.1 (CN), filed on Oct. 12, 2022.
Prior Publication US 2024/0125195 A1, Apr. 18, 2024
Int. Cl. E21B 33/06 (2006.01)
CPC E21B 33/06 (2013.01) 8 Claims
OG exemplary drawing
 
1. A combined sealing member for a coiled tubing blowout preventer box, comprising an upper plate, a first main sealing body, a second main sealing body, and a lower plate that are disposed in sequence from top to bottom, wherein the upper plate, the first main sealing body, the second main sealing body, and the lower plate are each provided with a through hole allowing a coiled tubing to pass therethrough;
the upper plate is composed of two upper plate units that are separable half-and-half; the first main sealing body is composed of two first main sealing body units that are separable half-and-half; the second main sealing body is composed of two second main sealing body units that are separable half-and-half; the lower plate is composed of two lower plate units that are separable half-and-half; and
the first main sealing body has a hardness greater than a hardness of the second main sealing body and a height smaller than a height of the second main sealing body,
wherein a bottom portion of the second main sealing body is provided with a truncated cone-like groove, while a top portion of the lower plate is provided with a truncated cone-like protrusion; and the truncated cone-like protrusion is in matching connection with the truncated cone-like groove.