Multi-stage hydraulic control water exploration switch and multi-stage repeated layering water exploration tubular column

• Main Authors: ZHU XIAOLIANG, ZHANG LINPENG, WANG LILI, GAO XIAOTING, ZHANG JINGBO, WU QINGLI, DING CHAO, XU XUENAN, LIU SHUANGLIANG, LI NAN, AN YAN, ZHANG QIAN, GAO HUAIXI, ZHAO JICHENG
• Format: Patent
• Language: Chinese; English
• Published: 04.01.2022
• 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 invention relates to a multi-stage hydraulic control water exploration switch and a multi-stage repeated layered water exploration tubular column. The multi-stage hydraulic control water exploration switch comprises a first outer pipe, and at least one one-way valve is arranged in the side wall of the upper end of the first outer pipe; an annular mounting groove is formed in the inner wall of the lower portion of the first outer pipe; a center pipe is arranged in the first outer pipe in a sleeved mode; the outer side of the center pipe is sleeved with a track pipe and a reset pipe in an up-down mode, and a first spring is arranged on the outer side of the reset pipe and located in the annular mounting groove in a sleeved mode; the outer wall of the track pipe is provided with at least one set of track grooves in the circumferential direction of the track pipe; each set of track grooves comprises a set of stopping grooves and a set of positioning grooves which are correspondingly arranged up and down; each