Isolation device and method of use

• Main Authors: LIU YINLEI, ZHAO SHAOWEI, LIU LIAN, ZOU WEI, ZOU RONG, LI XIAOBEN
• Format: Patent
• Language: Chinese; English
• Published: 06.08.2024
• 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 provides an isolation device. The isolation device comprises a first joint; the supporting mechanism is arranged on the downstream portion of the first connector and comprises a second connector, an outer sleeve and a shearing assembly, the outer sleeve is fixedly connected with the shearing assembly through a first pin and comprises a first through hole, the plugging mechanism comprises a ball seat, a piston sleeve fixedly connected with the outer sleeve through a second pin and a plugging assembly, the piston sleeve comprises a second through hole, and the second through hole is communicated with the second through hole. The second pin can be sheared off under the action of build-up pressure formed after the ball is thrown in, so that the piston sleeve is made to close the first through hole, and the first pin can be sheared off under the action of further build-up pressure, so that the piston sleeve is made to close the second through hole. Therefore, the plugging mechanism and the outer slee