# US 10,570,664 B2 · Wellbore reaming tool having shear cutters and gouging cutters > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,570,664 B2 - Document ID: US10570664B2 - Status: Granted - Kind: B2 - Application number: 15/888,843 - Filed: 2018-02-05 - Published: 2019-02-07 - Granted: 2020-02-25 - Earliest claimed: 2017-02-09 - Assignees: Shear Bits, Ltd. - Applicants: Shear Bits, Ltd. - Inventors: John James Herman; Carl M. Hoffmaster; Kenneth M. Nevlud; Jason Kelley; Shon Carey - Web page: https://patentgrep.com/patent/US10570664B2 ## CPC - E21B 10/26: Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers (percussion drill bits with leading portion E21B10/40) - E21B 7/28: Enlarging drilled holes, e.g. by counterboring - E21B 10/567: with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts - E21B: EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS ## Abstract A reaming tool includes a reaming tool body configured to be coupled within a drill string or a string of drilling tools. A plurality of reaming blocks is attached to the reaming tool body at circumferentially spaced apart locations. Each reaming block comprises at least one row of shear cutters and gouging cutters, the gouging cutters in the at least one row disposed rotationally ahead of the shear cutters in the at least one row. ## Claims ### Claim 1 A reaming tool, comprising: a reaming tool body configured to be coupled within a drill string or a string of drilling tools; a plurality of reaming blocks attached to the reaming tool body at circumferentially spaced apart locations; and wherein each reaming block comprises at least one row of shear cutters and at least one row of gouging cutters, the gouging cutters in the at least one row disposed rotationally ahead of the shear cutters in the at least one row, the gouging cutters being disposed at least one of, (i) longitudinally directly ahead of the shear cutters and (ii) longitudinally alternating between adjacent shear cutters. ### Claim 2 (depends on 1) The reaming tool of claim 1 wherein the gouging cutters are disposed longitudinally between adjacent shear cutters. ### Claim 3 (depends on 1) The reaming tool of claim 1 wherein each reaming block comprises two rows of shear cutters and two rows of gouging cutters. ### Claim 4 (depends on 3) The reaming tool of claim 3 wherein the two rows of shear cutters and gouging cutters are rotationally separated by a junk slot. ### Claim 5 (depends on 1) The reaming tool of claim 1 wherein the at least one row of shear cutters and at least one row of gouging cutters define a cutting profile having an increasing diameter with respect to a longitudinal position of the cutters along the cutting profile. ### Claim 6 (depends on 1) The reaming tool of claim 1 wherein the reaming blocks comprise a gage surface longitudinally proximate a longitudinal end farthest away from a drill bit. ### Claim 7 (depends on 6) The reaming tool of claim 6 further comprising at least one backreaming cutter assembly disposed longitudinally above the longitudinal end farthest away from the drill bit on at least one reaming block. ### Claim 8 (depends on 7) The reaming tool of claim 7 wherein the at least one backreaming cutter assembly comprises at least one backreaming shear cutter and at least one backreaming gouging cutter, the at least one backreaming gouging cutter disposed rotationally ahead of the at least one backreaming shear cutter on the at least one backreaming cutter assembly. ### Claim 9 (depends on 1) The reaming tool of claim 1 wherein the plurality of reaming blocks are fixedly mounted to the reaming tool body. ### Claim 10 (depends on 1) The reaming tool of claim 1 wherein the shear cutters comprise polycrystalline diamond compact cutters. ### Claim 11 (depends on 1) The reaming tool of claim 1 wherein the shear cutters are brazed to at least one reaming block. ### Claim 12 (depends on 1) The reaming tool of claim 1 wherein the gouging cutters are rotatably mounted to at least one reaming block. ### Claim 13 (depends on 1) The reaming tool of claim 1 wherein the gouging cutters are substantially conically or ballistically shaped. ### Claim 14 (depends on 1) The reaming tool of claim 1 wherein the gouging cutters are made from tungsten carbide. ### Claim 15 (depends on 1) The reaming tool of claim 1 wherein the gouging cutters are made at least in part from polycrystalline diamond and/or cubic boron nitride. ### Claim 16 (depends on 1) The reaming tool of claim 1 wherein at least one of the reaming blocks comprises a backreaming cutter assembly. ### Claim 17 (depends on 1) The reaming tool of claim 1 wherein the plurality of reaming blocks are circumferentially separated from each other around the reaming tool body by an angle defined by 360 degrees divided by a number of the reaming blocks attached to the reaming tool body. ### Claim 18 (depends on 1) The reaming tool of claim 1 wherein at least one of the gouging cutters comprises diamond monolith. ### Claim 19 (depends on 1) The reaming tool of claim 1 wherein at least one of the gouging cutters comprises diamond impregnated material.