Construction difficulties:
The packer is prone to wear during the feeding process, resulting in the inability to seal;
When encountering obstacles during feeding, the tool cannot meet the requirements of high displacement while flushing and lowering;
Due to the influence of the flushing ratio, it is easy to remove sand in advance, and the filling quality cannot be guaranteed;
After filling, it is difficult to quickly establish reverse circulation and there is a high risk of sand jamming.
Technical advantages:
The packer has anti erosion and anti eccentric wear functions (specially designed for horizontal wells);
When encountering resistance, it can rotate the column forward;
The filling position can be reversed for well flushing;
The filling service column adopts a decreasing outer diameter structure (which can effectively prevent sand jamming);
L can overcome the impact of platform uplift and subsidence on the lifting distance during the monsoon season.
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