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Balanced low shear control valve available
The Sancai Center of Gudong Farm in Shengli Oilfield has recently made a breakthrough by successfully developing a balanced low-shear cut-off regulating valve. This innovative technology enables oilfield injection pumps to simultaneously inject multiple wells, significantly improving operational efficiency. Traditionally, when injecting polymer solutions, the high sensitivity to mechanical shear viscosity posed a major challenge. If the regulating ball valve wasn't fully open or fully closed, it could cause severe polymer degradation, leading to reduced effectiveness. As a result, most injection pumps were limited to serving only one well at a time.
To address this issue, the Sancai Center introduced a conical design with a surfacing alloy material used at the seal between the valve core and seat. This advanced material provides excellent erosion resistance and ensures tight sealing, even under harsh conditions. Additionally, the valve's transmission system employs a step-down technology that allows for smooth and precise adjustments. These improvements make the valve not only more durable but also easier to operate in the field.
Testing results have shown that the new regulating valve offers high accuracy in controlling the polymer mother liquor, along with a remarkable viscosity retention rate. When the valve is fully open, at 2/3, 1/2, or 1/4 opening, the viscosity retention rate remains above 98%, demonstrating its effectiveness in minimizing shear damage. The valve’s performance has been validated through extensive field trials, proving its reliability and efficiency.
Currently, the innovative design of the regulating valve has been patented at the national level, marking a significant advancement in polymer injection technology. This development is expected to enhance the overall performance of oilfield operations and reduce maintenance costs associated with polymer degradation. The Sancai Center continues to explore new ways to improve fluid control systems, contributing to the sustainable development of the oil and gas industry.