Drill with casing to TD when running directional or MWD tools.
The Direct XCD drillable alloy casing bit is specially designed for drilling vertical or tangential wells to TD in one run. This PDC bit drills on standard casing that is rotated at the surface.
The bit’s sub is composed of durable oilfield-grade steel, and its body is a copper bronze alloy. This unique composition allows it to be drilled out by any standard PDC bit after the Direct XCD casing bit has drilled to TD and the casing has been cemented. After drillout, the drillout PDC bit can continue drilling the next interval, eliminating the need for a dedicated drillout run.
The cutting structure of the Direct XCD casing bit can be fitted with 13-, 16-, or 19-mm PDC cutters, which are available in standard or premium grades.
Drilling with the Direct XCD casing bit smears cuttings into the borehole wall, resulting in an action termed the plastering effect, which strengthens wellbores for improved cementing. The plastering effect process has proved to reduce NPT resulting from borehole-related problems, such as
large-diameter surface hole resulting in hard-to-remove cuttings from the annulus
damaged producing zones
In a field case, lost circulation resulted in two unsuccessful attempts to reach bottom using conventional drillstrings. On the third attempt, the operator used a Direct XCD casing bit. Its signature plastering effect eliminated lost circulation issues and produced a high-quality wellbore.
Eliminating a dedicated liner run through a high-loss gassy salt zone reduced rig time by multiple days.
Drillable alloy casing bit achieves effective ROP of 301.8 ft/h in Colombian well.
Advanced bit design enables operator to land 9 ⅝-in casing to TD in 4 days compared with 20 days in previous well.
Drillable alloy casing bit facilitates cost reductions and overall performance increase in existing onshore oil and gas condensate field.