Check valve

• Main Authors: LIU MINGJUAN, LU RENDE, LIN FULI, ZHANG DEYOU
• Format: Patent
• Language: English
• Published: 30.09.2015
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model discloses a check valve, include: first joint has first through -hole on it, the second connects, has the second through -hole on it, and first joint and second joint be airtight connection, first through -hole and second through -hole intercommunication, the seal is located the se...