Development and application of a new mobile-type downhole choke

In consideration of the difficulties in recovering the downhole chokes during using process and the problem of low recovery rate in Western Sichuan Province, new mobile downhole choke is developed, which optimized the integrated slips, gel cylinder with reset function and the spring system. This tool is short and of small outer diameter, can be easily used, the released, clamped, hanger are reliable and the recovery (fishing) rate is high. It was tested in 8 wells such as CX632 and worked quite well. Fishing operation in three wells including XS21-29HF also verified its high fishing success rate, so it is worth being widely promoted.