FIELD: drilling and repairs of gas and oil wells. SUBSTANCE: movable bushing of expanding coupling has cantilevered lugs with internal bevels. Jaws are located inside driven half-coupling with embracing movable bushing cantilevered lugs. Driving half-coupling rests on radial bearing and spring installed in driven half-coupling. EFFECT: higher reliability and efficiency of tongs. 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| WRENCH WITH ELECTROINERTIA DRIVE | 0 |
|
SU1789649A1 |
| MECHANICAL TONGS WITH INERTIA ELECTRONIC DRIVE | 0 |
|
SU1411428A1 |
| DRILL PIPE TONGS | 0 |
|
SU1819977A1 |
| REPAIR UNIT | 1991 |
|
RU2021476C1 |
| DRILLING TONGS FOR WELL TUBING | 0 |
|
SU1776753A1 |
| WRENCH FOR SCREWING TOGETHER AND UNSCREWING PIPES | 0 |
|
SU1434072A1 |
| PIPE LOCKING/UNLOCKING POWER TONGS | 0 |
|
SU1413234A1 |
| HIGH-TORQUE PIPE TONGS | 1991 |
|
RU2019677C1 |
| PIPE SPINNING WRENCH | 0 |
|
SU1629466A1 |
| MECHANICAL PIPE WRENCH | 1991 |
|
RU2042502C1 |
