Open-hole staged fracturing in horizontal wells is an advanced completion technology and one of the important measures for increasing production in low-pressure and low-permeability oil and gas reservoirs.

Its core process includes:
1. Segment isolation: Long horizontal well sections are separated into several independent isolated segments by open-hole packers.
2. Ball drop activation: Specific-sized fracturing balls are dropped from the wellhead. These balls are pumped down the well with the fracturing fluid to the ball seats of the sliding sleeves.
3. Staged fracturing: The fracturing balls are set at the designed positions, and the outlet channels of the sliding sleeves are opened by increasing the wellhead pressure, allowing high-pressure fracturing fluid to enter the formation for fracturing. As the ball seats are sized to decrease from top to bottom, different-sized balls can be dropped from small to large to achieve staged fracturing from bottom to top.
4. Dissolvable or flowback: After fracturing, the fracturing balls can be made of dissolvable materials (automatically dissolving after a certain period of time) or low-density alloy materials (expelled from the wellbore by post-fracturing flowback pressure), thus achieving full wellbore diameter and facilitating subsequent operations.

we has a complete multi-stage fracturing completion tool system and a series of acid-resistant dissolvable balls, which can meet the requirements of staged fracturing in different well conditions.