How to deal with common drilling rig accessories failures?

During the use of drilling rig accessories, you need to select appropriate models and parameters (drill pipe size). You need to know more about the assembly of drilling rig accessories, especially common troubleshooting issues.

1) Broken drill pipe:

1. Most of the drill pipe fractures are caused by the friction between the drill pipe and the hole wall, which makes the drill pipe wall thickness thinner and the strength is too weakened, causing the drill pipe to break.

2. Preventive treatment: Pay attention to inspection when adding drill pipes, and stop using drill pipes with excessive wear.

2) The impactor does not sound:

1. There are four common situations:
①The valve piece is broken;
② The broken ballast from the tail of the bit enters the cylinder and blocks the hammer body;
③The exhaust hole is blocked by rock powder;
④ When cutting downward, there will be a lot of water in the hole and the exhaust resistance will be great, making it difficult for the impactor to start.

2. Treatment method: When you find that the impactor does not sound, first check according to the above four reasons; the inspection method is to lift the impactor by a section to reduce the exhaust resistance, spray out a part of the water, and then slowly push it to the bottom of the hole. If this method does not work, it is likely to be due to the first three reasons, and the impactor needs to be removed and cleaned or replaced with another part.

3) Drill bit stuck

1. In addition to complex formations that can cause the machine to get stuck during normal drilling, there are also the following reasons:
①Broken wing of drill head;
②The diameter of the new bit is larger than the original one;
③During rock drilling, the displacement of the machine causes the drilling tool to deflect in the hole;
④When rock drilling, rocks fall from the hole wall or mouth or large fissures or caves are encountered;
⑤ When encountering a broken zone with yellow mud mixed with gravel, the rock powder cannot be discharged;
⑥ Negligence in operation. When drilling was stopped for a long time, the rock powder was not blown away and the drilling tool was not lifted, causing the impactor to be buried in the rock powder.

2. Treatment method: With the current strength of the drill bit, broken wings have been basically eliminated. In case of special circumstances, the rock powder at the bottom of the hole can be blown away first, and then a section of seamless pipe with a diameter similar to the hole diameter can be installed inside. Fill it with butter or asphalt, connect it with the drill pipe and send it to the bottom of the hole, and take out the broken wing at the bottom of the hole. When encountering the last five stuck drill conditions, the more serious situation is that the drill tool cannot be lifted or lowered. The wind motor does not rotate and the impactor does not sound. At this time, you can only apply external torque or use auxiliary tools to help lift the drill tool to rotate, and then lift the drill tool while supplying air until the fault is eliminated. When drilling rock again, apply a little pressure first, and then gradually increase it to normal working pressure.

4) Bit fragments, corner loss, and pieces falling off

1. When the drill pipe jumps, it may be the exchange of changes in the rock formation or stones or alloy pieces falling into it. Judging from the appearance, if the alloy pieces fall out, it will be almost impossible to drill, and the drill pipe will beat more rhythmically.
2. When it is confirmed that the alloy piece has fallen off, you can lift the drilling tool and blow out the alloy piece with a strong blow method. When it cannot be blown out, you can also use the broken wing of the drill bit to pick it up. If there is a fault or broken zone in the hole, At this time, squeeze the alloy into the hole wall in these places, or you can replace it with a new drill bit and continue drilling without taking it out.

5) Precautions for using wind motor
1. Before connecting the motor and the hose, the hose should be carefully cleaned. You can open the pipeline air valve for a few seconds and blow out the hose with compressed air before connecting.
2. The connection between the motor and the hose must be firm.
3. Before operation, make sure there is lubricating oil in the lubricator and the lubricating oil path is smooth. It is not allowed to work without lubricating oil.

4. When it is found that the motor is not running normally, the work should be stopped immediately and maintenance should be carried out. It is prohibited to dismantle or disassemble on the working surface.

Read more: Drill pipe connection method