Fit the rig tongs with the correct jaws for the drill pipe tool joint or the drill collar. Re-install the safety locksprings.
给大钳装上与钻杆接头或钻铤相匹配的钳头,再装上安全锁簧。
2
The rig tongs hinge pin, latch lock and springs must be inspected at regular intervals and changed out if excessive wear is encountered.
必须定期检查大钳的折页销子,扣合头和弹簧,如果出现磨损超标,就更换。
3
The rotating valve is connected respectively to four hydraulic lock through two throttling governors which are connected respectively with the four oil and gas springs.