| 主权项 |
1. A reamer for use in a downhole environment, comprising
an annular body having a first end, a second end, and an exterior, a plurality of cutting blades on said exterior, each of said blades comprising
a first linear tapered section rising from said exterior from a point proximate said first end toward the midpoint of said body,a second linear tapered section rising from said exterior from a point proximate said second end toward the midpoint of said body, anda spiral section having a constant radius relative to said body joining said first tapered section to said second tapered section, wherein said first linear tapered section and said second linear tapered section comprise a plurality of first cutting inserts, and said spiral section comprises a plurality of second cutting inserts. |
