Production-adjustable well cementation sliding sleeve staged fracturing valve

• Main Authors: ZHANG GUANGHENG, LIU CHUNYU, ZHU YUJUN, HAN QINGSONG
• Format: Patent
• Language: Chinese; English
• Published: 05.11.2019
• 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

A production-adjustable well cementation sliding sleeve staged fracturing valve is characterized in that an outer sleeve sleeves and is in threaded connection with an outer wall boss of an upper joint, and a pressing plate is mounted at the outer end of the outer sleeve. The upper end of the sliding sleeve is inserted into the lower end of the upper connector, the upper end of the sand blasting sleeve is sleeved with and in threaded connection with the outer wall of the lower end of the upper connector, and the upper end of the lower connector is inserted into and in threaded connection with the lower end of the sand blasting sleeve. The production adjusting locking ring is arranged in a groove in the inner side of the lower end of the upper connector and is in threaded connection with theouter wall of the production sliding sleeve. The upper end of the sliding sleeve sleeves the outer wall of the lower end of the sliding sleeve. The inner wall of the lower end of the sliding sleeve is in threaded connection