Staggered wellbore annulus packing tool and method

Abstract

The invention relates to the technical field of wellbore packing, and particularly discloses a staggered wellbore annulus packing tool which comprises a staggered flow choking component, an annulus sealing component, a hydraulic driving component and a springback reset component, the annulus sealing component is connected in a wellbore annulus, the staggered flow choking component is connected in the annulus sealing component, and the hydraulic driving component is connected in the springback reset component. The hydraulic driving part is in driving connection with the end, facing fluid input into the annulus, of the staggered flow blocking part, the hydraulic driving part is used for driving the staggered flow blocking part to block or pass power fluid flowing in from the shaft annulus, and the springback reset part is connected with the end, away from the staggered flow blocking part, of the hydraulic driving part and used for resetting the hydraulic driving part. The tool overcomes the functional defects that an existing wellbore annulus packing tool is poor in control flexibility and low in reliability, sealing elements are low in durability, multi-point arrangement cannot be achieved, and position adjustment is difficult.

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