FIELD: mining industry. SUBSTANCE: method of connecting drill-rods includes manufacturing drill-rods with capability of screwing one into another. Each of drill-rods has three landing portions: threaded portion, cone-shaped self-braking portion and cone-shaped non-self-braking portion. Portions are located along drill-rod axis in order from threaded portion to cone-shaped non-self-braking potion through cone-shaped self-braking portion. Portion sizes are selected so that members come into contact in cone-shaped non-self-braking portion after resilient closure in cone-shaped self-braking portion. EFFECT: removal of special operating conditions leading to overloads in separated connection portions. 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| THREAD, ANCHOR AND DRILLING EQUIPMENT OF BLAST HOLE | 2006 |
|
RU2377410C9 |
| 0 |
|
SU335381A1 | |
| SPIRAL ANCHOR | 1997 |
|
RU2134351C1 |
| ANCHOR BOLT WITH MECHANICAL ANCHOR | 2008 |
|
RU2470158C2 |
| THREADED CONNECTION OF DRILL STRING SECTIONS | 2021 |
|
RU2761054C1 |
| SAFETY FRICTION CLUTCH | 0 |
|
SU1657790A1 |
| BIT FOR BLASTHOLE DRILLING | 2001 |
|
RU2212510C2 |
| ASSEMBLY OF DRIVE STRING (VERSIONS) | 2007 |
|
RU2426860C2 |
| 0 |
|
SU258997A1 | |
| MAKESHIFT DRILL | 0 |
|
SU1763648A1 |
