Disclosed are blending tool and production string

The utility model provides a diluting tool and a production pipe column. The diluting tool comprises a pipe body and a one-way valve, the top end of the pipe body communicates with an upstream oil pipe, and the bottom end communicates with a downstream oil pipe; and the one-way valve is arranged on the pipe body and only allows the viscosity reducer outside the pipe body to flow into the pipe body. The viscosity reducer is controlled to flow into the pipe body through opening and closing of the one-way valve, and compared with the mode that the through hole in the side wall of the pipe body isopened and closed through sliding of the sliding sleeve, the sliding sleeve and a sealing ring between the sliding sleeve and the pipe body do not need to be arranged; petroleum in the oil pipe is prevented from flowing into an annular space between the oil pipe and the sliding sleeve due to damage of the sealing ring. 本实用新型提供一种掺稀工具及生产管柱，该掺稀工具包括：管体及单向阀；管体的顶端与上游油管连通，管体的底端与下游油管连通；单向阀设置在管体上，且单向阀只允许管体外部的降黏剂向管体内部流动。通过单向阀的开关来控