Downhole oil-water separation method is designed to solve two major problems—the produced water lifting, storage and processing problems, and the environment issues related to the water processing—faced by the high water cut oil fields, and proposed a solution. With the oil-water separator and ancillary equipment, the high water cut flow can be processed downhole directly, the oil-rich separated liquid can be pumped to the ground, and the remaining low oil flow can be injected into the target layer within the same well. The system meets the different requirements of the “upper production & lower injection” and “lower production & upper injection” processes, greatly reducing the liquid-processing job on the ground.

Assembly：

• Electric Pump • Monitoring & Control Device
• Oil-Water Separator
• Pipe String & Ancillary Tool

Specifications:

• Adjusting Pipe:  9-5/8〞（ 9-5/8〞+7〞tail pipe);
• Liquid producing capacity
• 300-500m³/d；
• 500-800m³/d；
• 800-1200m³/d；
• Reinjectivity: ≤60% fluid withdrawal rate
• Injection flow rate: ≤600m³/d;
• Injection operating pressure: ≤20Mpa;

Applicable well condition:

• Simple pipe string of regular Y-bend guarantees the dependable service life.
• The monitoring and control system guarantees the separator working under the best condition.
• Slick line operation guarantees the regular production while the separator went wrong.
• Servicing: optimize the injection recovery compatibility and pipe string matching. Follow up the separation effect after completion and adjust the parameters.