Stiletto Under Reamer

The BesteBit Stiletto Under Reamer is a durable and cost-effective solution for drilling inefficiencies and out-of-gauge wellbores. Its single-piece body and FEA modelling ensure robust performance with a low-mass, symmetric design, offering up to 25% hole opening ratios and enhanced hole cleaning. Featuring hydraulic activation (ball drop or preset jet nozzles), the Stiletto delivers consistent, complete opening in a single run. Paired with Trident PDC cutter technology, it ensures high drilling efficiency and full-gauge holes. Available in multiple diameters and compatible with rotary steerable systems (RSS), it can also clean cement or act as a stabiliser.

Features & Benefits

• Application-Specific Trident PDC Cutter Blocks – Ensures high drilling efficiency, consistent full-gauge wellbores, and durability across soft to abrasive formations.
• Single-Body FEA-Modeled Design – Provides robustness and reliability, reducing vibration and improving overall hole quality.
• Hydraulic Activation (Ball Drop or Controlled Pressure Drop) – Ensures consistent and efficient tool opening, enabling hole enlargement in a single run, reducing non-productive time.
• Concentric Symmetric Mass-Balanced Design – Maximises hole opening ratios (up to 25%) and enhances hole cleaning, improving overall drilling performance.
• Compatible with Rotary Steerable Systems (RSS) – Versatile and adaptable for use in all formations, ensuring smooth operations in various wellbore configurations.
• Adjustable Jet Nozzles & Integrated Flow Paths – Enhances hole cleaning and optimises flow management, resulting in smoother, more efficient drilling.