Drilling on gauge sub

Details Drilling on gauge sub Drilling on gauge sub

E - Fixed Constructions

21

B

E21B 10/26 (2006.01) E21B 10/40 (2006.01)

Patent

CA 2461082

A drilling on gauge sub including a tubular housing having a first end, a second end and an exterior surface. Coupling means are positioned at both the first end and the second end of the tubular housing to couple the tubular housing to other components of a drill string. At least three cavities are provided in the exterior surface of the tubular housing. Each of the cavities having a first end and a second end. Reamer cutters are secured within each of the at least three cavities. The reamer cutters including cutters mounted on rotatably mounted rollers.

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