Cutter assembly

Abstract

There is a cutter assembly for a roller reamer for downhole drilling. The cutter assembly has a first end block and a cutting element having a plurality of cutting projections. The cutting element is rotatably mounted to the first end block. The cutter assembly further has (a) a primary locking assembly having a primary bore in the first end block for screwing in a primary screw to attach the cutter assembly to a reamer body and (b) a secondary locking assembly. The secondary locking assembly has a secondary bore in the first end block having a threaded section and a secondary bolt screwed into the threaded section. The secondary bolt has a head and a threaded portion. The secondary bolt is for unscrewing out such that the head is received in a locking bore of the reamer body to attach the cutter assembly to the reamer body.

Dependencies are inferred from the claim text.