Electric submersible pump discharging and mining device adapted to coiled tubing completion

Abstract

The invention discloses an electric submersible pump discharging and mining device adapted to coiled tubing completion. The electric submersible pump discharging and mining device comprises an electric cable hanging device, an overcurrent pipe nipple, a coiled tubing, a coiled tubing connector, a conversion pipe nipple, a downhole motor and a downhole pump group which are connected in sequence from top to bottom. The upper end of the overcurrent pipe nipple is connected with a hanging device delivering joint. The coiled tubing is hung through a coiled tubing hanging device. An electric cable hung by the electric cable hanging device extends into the coiled tubing, penetrates through an electric cable sealing joint on the conversion pipe nipple, and then arranged and matched with the downhole motor and the downhole pump group. According to the electric submersible pump discharging and mining device adapted to coiled tubing completion, electricity supplying to a downhole electric submersible pump system is achieved by adopting the fact that the electric cable penetrates through the interior of the coiled tubing, and meanwhile, friction damage caused by the situation that the electriccable is externally arranged on the tubing can be avoided; and safe tripping in of the downhole electric submersible pump system is achieved through a coiled tubing working machine, and then non-wellkilling operation is further achieved.

Description

technical field [0001] The invention relates to the technical field of downhole electric submersible pump drainage, in particular to an electric submersible pump drainage device adapted to coiled tubing well completion. Background technique [0002] With the further exploitation of gas fields, the formation energy continues to deplete, and the use of electric submersible pumps will eventually become a more suitable production method for high-yield water-gas wells. Since the downhole electric submersible pump drainage system needs to be connected to the ground power supply through a power cable, special tools are required to bind the power cable to the outer circumference of the tubing, so that the conventional snubbing device cannot complete the tubing under pressure, and it must be controlled by killing the well. After the wellbore pressure is lowered into the electric submersible pump drainage system, another inherent disadvantage of this process is that the cable is easil...

AI Technical Summary

Problems solved by technology

Since the downhole electric submersible pump drainage system needs to be connected to the ground power supply through a power cable, special tools are required to bind the power cable to the outer circumference of the tubing, so that the conventional snubbing device cannot complete the tubing under pressure, and it must be controlled by killing the well. After the wellbore pressure is lowered into the electric submersible pump drainage system, another inherent disadvantage of this process is that the cable is easily damaged by the friction of the well wall during the downhole process, resulting in low construction efficiency and great damage to the formation

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