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 second through -hole, and is equipped with spacing arch on the internal face of the outer peripheral face of seal and/or second through -hole, makes the seal coaxial with the second through -hole, and the elastic component, one end is supported on first joint, and the other end supports on the seal, makes the airtight cooperation of internal face of outer wall with the second through -hole of seal. The utility model discloses can use oil development technical field, when check valve was used for the horizontal well, the effect was belliedly right down spacing to its seal, can remain throughout to be in coaxial state with second through -hole, elastic component, made the spring atress even, and the seal can keep good sealing, improvement check valve's life with the base under the effect of the even elasticity of elastic component.