Process Description:

　　One layer of gravel filling is achieved through a single trip of the pipe column; The inner and outer pipe columns are assembled at the wellhead according to the piping schedule and delivered to the sand control section by the drill pipe; After pitching the ball and sealing the top packer (without the need for backwashing the ball), press and lift the string, and release the service tool; The external sand control pipe column is fixed in the sand control well section, and the setting position of the packer is the filling operation position of the service pipe column; After the service tool is released, the filling operation can be carried out with an overpressure pipe column of 5-10t.

Process Features:

● Column specifications: 7 ", 9-5/8";

● One trip of pipe column, one layer of filling;

● Can perform deep fracturing and repeated fast water filling operations;

● 7 "pipe column achieving 3.88" inner diameter 9 5/8 "achieving 4.75" inner diameter;

● No backwash ball operation;

● The sealing position is the filling position, which is easy to operate and accurate in position;

● After the completion of multi-layer filling, the 7 "column can achieve a diameter of 3.88", and the 9-5/8 "column can achieve a diameter of 4.75", making it easier to achieve separate production and injection in the later stage.