Patent ID: 9297209
Filing Date: 2016-03-29
CPC Classification: E21B

Claim Text:
1. A bidirectional stabilizer for stabilizing a drill string while reaming into and out of a wellbore, the bidirectional stabilizer comprising: a. a shaft connected between a first shaft end and a second shaft end, wherein the shaft comprises an outer diameter; b. the first shaft end and the second shaft end centered around a longitudinal axis; c. an annulus formed longitudinally through the shaft, wherein the annulus is configured for maximum wellbore fluid flow; d. a cutting portion formed on an outer surface of the shaft, the cutting portion comprising: wherein an end portion and a nose portion range in length from 25 percent to 35 percent of a total length of the bidirectional stabilizer, and the bidirectional stabilizer couples on the end portion to the drill string and on the nose portion to a bottom hole assembly and the bidirectional stabilizer has a symmetrical configuration.