Tool Introduction

The expansion shoe support packer is located at the upper end of the test column and connected to the lower part of the B-type filter screen. The filtered liquid is pumped into the packer rubber cylinder by the expansion pump to expand and seal it.

Structural characteristics

① The sealing length of the expansion rubber cylinder is long, relying on internal liquid pressurization to expand the rubber cylinder;

② Suitable for irregular, elliptical boreholes and soft formations.

operation

When the downhole expansion pump is working, the expansion fluid enters the rubber cylinder through the expansion channel between the shaft and the rubber cylinder, causing it to expand and seal the wellbore.

technical parameter