A major independent was drilling in Canadian County Oklahoma with an oil base mud (OBM) and using a rotary steerable and drilling to 20,000 feet. The operator had made three attempts to drill the final 2,000 feet to TD, however, the torque and friction encountered were unmanageable. On the fourth try, the drilling team chose to run 4 ppb of SUN’s Lubra-Glide® Beads for mechanical lubrication enhancement. In order to ensure the beads re-mained in the mud system at the designated concentration, a SUN Bead Recov-ery Unit (BRU) was included in the operation. The product, personnel, and BRU system was in place in less than 24 hours. The fourth try was successful, and with SUN Beads in the system, the operator reached TD in 3 days of drilling.
The Lubra-Glide® Bead Recovery Unit (LGBRU) is a patented closed-loop system by which our process of recovering over 90% of the Lubra-Glide® Beads for continuous reuse while drilling horizontal or high angle wells to significantly reduce torque and drag is readily accomplished and historically successful.
This process allows the operator to maintain a consistent distribution of beads throughout the system. SUN’s Lubra-Glide® PSD range not only provides you with the optimal size bead for drilling and sliding but allows the operator to use screens on the rig primary shakers that are necessary for optimum fluid performance.
The modular nature of the BRU System allows for easy set up on any location without reconfiguration of the rig equipment, critical to limited space locations.
The technology behind Lubra-Glide® Co-Polymer Beads is based on several performance factors. A stand-off in the wellbore not only reduces friction and torque issues but significantly minimizes the potential for stuck drill pipe. Due to the spherical nature of Lubra-Glide® beads, the ability to absorb impact, aid rotation, and provide stand-off are the key ingredients for reducing casing wear and friction issues inside the cased hole. The resistance to deformation or breaking is critical to continued performance while the beads remain in the drilling fluid. The lightweight, 1.06 Specific Gravity, of the co-polymer beads allows for a better distribution and suspension throughout the drilling fluid where they are needed, rather than just the low side of the hole where they will co-mingle with cuttings beds as heavier glass and ceramic beads would. Glass or ceramic beads are brittle, often not spherical and can easily become split or broken whereby they will become incorporated into the drilling fluid as unwanted abrasive solids increasing torque, drag and casing wear problems.