SPB (Z-bit)
An alternative to a conventional bull nose to guide BHAs through pre-drilled pilot holes.
SPB - BHA Components
Description
An alternative to the standard Bull Nose sub utilizing an offset rotating cutter to guide the drill string through deviated holes, punch through bridges, and reduce sidetrack risk. Compatible with any BHA.
The HOC Spherical Pilot Bit was created for guiding well bore enlargement tools in a variety of applications.
Features and Benefits
Replaces conventional bull nose in order to avoid "stabbing" into washouts down hole.
The unique off-set cutter design is used to prevent side-tracking while borehole enlarging down hole on wiper trips.
Rolling motion of cutter enables the SPB to work its way into pilot hole.
Followed by a hole opener or underreamer to open hole to full gauge.
Jet nozzle in shank keeps cutter teeth clean.
Available cutting structures: Sealed Bearing Mill Tooth and Sealed Bearing TCI cutters.
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