The new Counter Force antislip/stick tool (AST) solution by Tomax keeps the lower bottomhole assembly and the drill bit suspended in both axial and rotational directions at the critical moment when the first cutter touches the rock. As the load increases, the helix-telescope function of the Tomax AST ensures a steady load within the capacity of the fresh cutters, regardless of how hard the rock is. As more of the cutters are engaged, a smooth bottomhole pattern develops. When the full cutting face is engaged, the Counter Force AST system is practically offloaded, while the main springs in the AST system take over to keep the system in tune. Now the weight on bit (WOB) can be brought beyond the compressive strength of the rock to produce a fast, yet safe, rate of penetration. The patented Counter Force AST makes it safe to run a drill bit that is sharp enough to stay engaged even in the hardest layers. A continuous cut at moderate WOB produces less heat and makes the cutter last considerably longer. The larger cuttings from a sharper edge are removed more easily, to leave the cutting surfaces clean at all times.
- For additional information, visit www.tomax.no.