Robust, durable and complete with a borehole enlargement system to improve time efficiency of drilling operations while accelerating the entire drilling process; applicable to achieve a high performance in concentric drilling and enhance the outcome of drilling by improving the quality of well bore and reducing the times of drilling.
• Facilitates rotary drilling and directional drilling operations.
• With a water hole design to remove rock fragments while reducing the erosion of borehole wall.
• Fitted with highly wear resistant PDC cutting teeth for use in different strata.
• Features a novel driving groove design, making the opening and retraction of blades reliable.
• Incorporated with the patented three-pitch design and electric coordination control for a reliable work performance.
• Available in different sizes and specifications to suit a wide range of applications, inclusive of reaming in confine spaces during and after drilling operations, the coordinated operations of connection and rotary steering, unconventional casing programs, expansion screen pipe completion, keyway removal, trimming of borehole wall, expandable and collapse-prone strata, and the improvement of well reinforcement works.
• Supports three-blade concentric reaming, reversible reaming, hydraulic control, and the opening of electrically controlled blades, along with the automatic retraction of blades, pitching and displacement activation while the pump stops operation.
