-
-
-
-
Honor
-
-
-
-
-
Contact
-
Yikuang Technology analyzes the reasons for the loss of drilling tools for you.
Release time:
2020-09-09
Author:
Source:
Cause Analysis of Drill Loss (1) The non-concentric drill tail, connecting sleeve and drill pipe of the drill set cause bending deformation of the drill set and stress, resulting in non-cooperation at the joint of the drill set and loosening of the joint part. (2) The pushing pressure is too low, which reduces the penetration efficiency of rock drilling, causes the combination to loosen, causes the energy loss transmitted by the drilling tool group, causes great stress, and causes the instantaneous contact and separation of the contact joint end face. Insufficient pushing pressure is manifested by heating of the drilling tool, "clatter" at the joint, excessive heat causing excessive thread wear and corrosion pits. If the pressure is too high and the rotation speed of the drill bit is too low, there is danger of sticking, and the drill pipe is bent at the same time.
Cause Analysis of Drill Loss
(1) The drilling tool group is not concentric
The non-concentricity among the drill tail, the connecting sleeve and the drill pipe causes the bending deformation of the drill tool and generates stress, resulting in the non-matching of the joint of the drill tool group and the loosening of the joint part.
(2) Propulsion pressure
If the pressure is too low, the drilling penetration efficiency will be reduced, causing the combination to loosen, causing the energy loss transmitted by the drilling tool group, causing great stress, resulting in instantaneous contact and separation of the contact joint end face. Insufficient pushing pressure is manifested by heating of the drilling tool, "clatter" at the joint, excessive heat causing excessive thread wear and corrosion pits. The pressure is too high, the drill bit rotation speed is low, there is a danger of sticking, and the bending stress of the drill pipe increases.
(3) Impact pressure
If the impact pressure is not adjusted properly, it will directly affect the rotation speed, the efficiency of the rotary drilling and the life of the drilling tool.
(4) Rotation speed
The slewing speed should match the drill diameter and the impact frequency of the rock drill. The larger the drill bit, the lower the rotation speed, and the high rotation speed will damage the periphery of the drill bit.
(5) Swing pressure
Normal rotary pressure is very important, it can not only provide proper anti-card protection for the drill pipe, but also ensure a certain rotary pressure. The increment of rotary pressure is the key factor to keep the tightness of the brazing tool group. Insufficient tightness often causes heating of the connecting part, peeling of the thread surface, early wear of the thread and even fracture of the thread.
(6) improper use method
After the use of the drilling tool combination, if used in conjunction with the new drilling tool will shorten the service life of the drilling tool, in addition, the rod is not aligned, there is sand on the thread, the thread connection without lubricating oil is also easy to damage the drilling tool. "Empty hitting" is the most serious damage to drilling tools and should be avoided as far as possible.
Key words:
Technology, pressure, rotation, speed, thread, drill, connection, cause, impact, damage
