DRILLBITS WINNER: ULTERRA - SPLITBLADE PDC BIT

摘要

Poor cuttings evacuation from the tool-face of the drillbit has long been known to limit ROP. When traditional drillbit designs leave cuttings trapped on the toolface, collecting around the cutters and junk slots, drilling energy is wasted, toolface control is compromised and the bit can be damaged as result of rising temperatures. Ulterra's SplitBlade PDC drillbit design was developed to address the problem of poor cuttings evacuation. With its unique split blade geometry and double-barrel hydraulics, SplitBlade has enabled operators to achieve dramatically improved ROP, durability and directional control. The drillbit's primary blades separate past the cone, creating large-volume flow channels for cuttings evacuation. Vectored nozzles create a double-barrel hydraulics effect, dramatically boosting the maximum cuttings dispersal rate. This design channels more fluid directly onto the cutters, continually sweeping the, junk slots and causing cuttings to be cleared from the cone up to seven times faster than conventional PDC drillbits. This improved cleaning allows the bit face to engage and fracture rock unimpeded, increasing ROP. The hydraulics of SplitBlade keep cutters cleaner, lowering residual heat, reducing thermal damage and increasing bit performance and longevity.