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What checks should be made before the drill bit is in the well?
Release time:
2019-09-21
Author:
Source:
1 Check the screw thread and shoulder for damage
2 Check whether the cone bearing is in good condition
3 check whether the teeth are in good condition, whether there is bite phenomenon
4 Check whether the installation of water eye is reasonable
5 Check whether the buckle type is consistent with the mating joint.
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