Water injection well ordinary pressure workover anti -overflow flows shutoff instrument

• Main Authors: HUANG YOUQUAN, WANG DONGXU, SUN XIAOMING, ZHANG ZHILONG, HAO WEIDONG
• Format: Patent
• Language: English
• Published: 04.11.2015
• 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 relates to a water injection well ordinary pressure workover anti -overflow flows shutoff instrument has solved conventional waterflooding well workover and has not taked intraductal shutoff, and it influences the problem of environment to cause the overflow to flush easily, concrete including top connection, overcoat, go up sliding sleeve, sliding sleeve and lower clutch down, set up on the wall of overcoat that the overflow circulation is said and the underflow circulation is said, wherein go up the circulation of sliding sleeve outer wall shutoff overflow and say, the circulation of lower sliding sleeve outer wall shutoff underflow is said, goes up the vertical bar through -hole of outer wall equipartition that sets up elastic support, this elastic support between sliding sleeve and the lower sliding sleeve, go up the sliding sleeve and when the sliding sleeve glides to instrument overcoat bottom down, the overflow circulation says and opens, and the underflow circulation is said and is fed through with elastic support's bar through -hole. Because the overflow is all retrieved from the oil jacket annular space when playing the tubular column operation, the purpose of clean operation has been reached.