9.5 Inches

9.5 inch drill bits (241.3mm) are typically deployed in intermediate casing hole sections where a larger diameter is needed before stepping down to production size. This bit size is favored in operations that require 7-5/8" or 8-5/8" casing, providing adequate cementing annulus and allowing for future deepening or sidetracking if needed. It's a common choice in both onshore and offshore drilling programs.

Core Advantages:

- PDC and roller cone options with optimized cutter density for medium-hard formations

- API 4-1/2 REG or 6-5/8 REG pin connections for various drill string sizes

- Enhanced gauge protection for extended runs in abrasive intervals

- Larger junk slot area for efficient cuttings removal at higher flow rates

- Compatible with standard 9-5/8" surface casing programs

- Custom nozzle sizes for precise hydraulic optimization

Q: Can I use a 9.5-inch bit for water well drilling?

A: Yes, for high-yield municipal or agricultural water wells, a 9.5" bit allows installation of 8" steel casing with gravel pack. It's less common than smaller sizes due to higher cost per foot, but justified for large-capacity wells.

Looking for 9.5-inch drill bits for your intermediate hole section? Contact us with your casing program details and formation lithology for a precise recommendation.