Fluid excitation type infinite circulation well washing tool

• Main Authors: SHI QINGTIAN, SHI YUHENG, MA YUCHEN, LI WEI, LIU XINYI, LIU DEJU, LYU YINGCHEN, DONG MENGCHEN, DONG YA
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2020
• 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 fluid excitation type infinite circulation well washing tool. The device comprises a main cylinder, an upper joint, a lower joint, an upper mandrel, a lower mandrel, a piston, a transposition spring, a transposition element and a limiting element, a through hole and an upper core shaft bypass hole are formed in the upper core shaft; a blind hole and a lower mandrel bypass hole are formed in the lower mandrel; a transposition groove and a piston bypass hole are formed in the piston; a water hole is formed in the main cylinder; the piston can be matched with the transposition element through the transposition groove to achieve switching of the circumferential position of the piston. The piston can be matched with the limiting element to achieve axial position switching of the piston, so that infinite circulation switching of a fluid channel is achieved, the reaction speed is high, the influence of a well inclination angle is small, and the problems that theopening frequency of an e