FIELD: soil or rock drilling.
SUBSTANCE: invention relates to drilling equipment and relates to the connection of sections of drill strings consisting of drill screws, pipes or rods. Said threaded connection of sections of the drill string contains a coupling and a nipple with a cylindrical thread, as well as centering surfaces made from its lead-in part in the form of a recess in the coupling and a groove on the nipple. At least part of the side profile of the first turn of the thread of the coupling, facing outward, and the similar part of the first turn of the thread of the nipple facing it are equipped with elements, which, when mated with each other, transmit torque that is intentionally greater than the moment of resistance to unscrewing the coupling and nipple, mated to the full length of screwing.
EFFECT: reducing the complexity of the dismantling of the threaded connection while maintaining its self-locking properties.
7 cl, 8 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| THREADED CONNECTION OF DRILL STRING SECTIONS | 2021 |
|
RU2761054C1 |
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|
RU2544925C1 |
| INTERLOCK CONNECTIONS OF SCREW. | 2006 |
|
RU2347886C2 |
| AUGER TOOL JOINT | 2016 |
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| BENCH TO TEST THREADED PIPE CONNECTIONS WHEN SCREWED-UNSCREWED IN CORROSION ENVIRONMENT | 2013 |
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| AUGER FLIGHT | 2017 |
|
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| BALANCED THREADED DRILL STRING CONNECTION | 2022 |
|
RU2783935C1 |
| PIPE SCREWING/UNSCREWING DEVICE | 0 |
|
SU1145118A1 |
