Mechanism and prevention method of drill string uplift during shut-in after overflow in an ultra-deep well

Hu YIN,Menghan SI,Qian LI,Hongwei JANG,Liming DAI

Table 2 Parameters of bottomhole assembly distribution.

Drilling tool name Outer diameter/mm Inner diameter/mm Length/ m Weight per unit length/(N·m-1) Bit 165.1 38.10 0.23 620.25 Drill collar 120.7 57.20 180.00 683.00 Drill pipe 101.6 84.83 5 989.77 233.34