Underground tubular column length free regulation device

• Main Authors: MU ERQI, ZHANG JIPING, ZHANG HUI, YI WANJUN, GAN YUTAO, SHI JINGDONG, MIN ZHANGTAI, SUI XIAOMING, GU ZHIYUAN
• Format: Patent
• Language: Chinese; English
• Published: 03.09.2014
• 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 relates to an oil field underground tool, in particular to an underground tubular column length free regulation device. A telescopic short joint of the device and a telescopic sealing short joint are connected in a threaded mode. The telescopic short joint can move up and down in the telescopic sealing short joint through rotation. An O-shaped seal ring is arranged on the telescopic sealing short joint. The O-shaped seal ring and the inner wall of the telescopic short joint are sealed. A locking ring is connected to the telescopic sealing short joint and can lock the telescopic short joint. The underground tubular column length free regulation device can freely regulate the length of an underground tubular column, is simple in structure, convenient to operate and capable of greatly reducing on-site construction workloads, and overcomes the defect that the length of an existing underground length-fixed tubular column can hardly be freely regulated.