US 12,000,215 B2
Drilling string, threaded coupling, and rod adaptor for rotary drilling
Manoj Kumar Suryadevara, Zeltweg (AT); Todd Bonniface, Salamander Bay (AU); and John Barry, Merewether HTS (AU)
Assigned to Sandvik Mining and Construction G.m.b.H., Zelteg (AT); Sandvik Mining and Construction Australia Pty Ltd, Milton (AU); and Sandvik Mining and Construction Australia (Production/Supply) Pty Ltd, Milton (AU)
Appl. No. 17/299,103
Filed by SANDVIK MINING AND CONSTRUCTION G.M.B.H., Zeltweg (AT); SANDVIK MINING AND CONSTRUCTION AUSTRALIA PTY LTD, Brisbane (AU); and SANDVIK MINING AND CONSTRUCTION AUSTRALIA (PRODUCTION SUPPLY) PTY LTD, Brisbane (AU)
PCT Filed Nov. 6, 2019, PCT No. PCT/EP2019/080306
§ 371(c)(1), (2) Date Jun. 2, 2021,
PCT Pub. No. WO2020/114699, PCT Pub. Date Jun. 11, 2020.
Prior Publication US 2022/0074273 A1, Mar. 10, 2022
Int. Cl. E21B 17/042 (2006.01); E21B 3/00 (2006.01); F16L 15/06 (2006.01)
CPC E21B 17/042 (2013.01) [E21B 3/00 (2013.01); F16L 15/06 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A drill string for rotary drilling with underground mining machines, the drill string comprising:
a first elongate drill string member having a main section and a male end; and
a second elongate drill string member having a main section and a female end, the male end and the female end each having respective threads arranged to provide a thread coupling between the male end and the female end, the thread coupling enabling the male end to be secured inside the female end such that the male end and the female end overlap axially, wherein a thread lead of the respective threads of the male end and the female end is greater than a diameter of the male end and a diameter of the female end, wherein the thread lead is a distance along an axis of the respective thread that is covered by one complete rotation of the thread, and wherein the respective threads of the male end and the female end are right-handed threads.