From the outside, the rotary drilling rig feels very tall, and when you enter the cab, you feel that there are many handles and buttons. Generally speaking, it gives people a very complicated feeling. However, this is indeed the case. From the positioning of the machine to the auxiliary working conditions, and then to the drilling in the main working condition, a lot of actions are required. However, in order to start the rotary drilling rig well, there are many operations. Pressure is the most important!

The pressure we mentioned here is not to press down through the handle, but to control the pressure and time for different rock and soil bottom layers. The routines are as follows: pressure lifting, suspension point floating, long floating, Point pressurization, short stroke pressurization, long stroke pressurization, pressurization back pressure

1. How to improve efficiency

Although the rotary drilling rig has many actions, the ultimate function is to drill. How to drill fast and well, pressure control is of course important, so it is necessary to continuously adjust the pressure method according to the geology, load and vibration. Some people began to question what pressure is about, not just pushing the handle down to apply pressure. This is a mistaken belief that pressure is not just pressure, sometimes it just needs to float without pressure, and sometimes it needs back pressure. In short, only by flexibly using the pressurization can the performance of the drilling rig be exerted and the high-efficiency output can be achieved.

2. Protect the equipment

The load of the bottom layer is constantly changed by the drill bit, and the pressurization method and intensity can be adjusted flexibly, which can not only protect the components, but also achieve rapid footage. Otherwise, if you only focus on pressurization, not only the load of the drill will increase, but also the drill pipe and drilling tool will be easily damaged.

3. Eliminate hidden dangers

Partial hole: Everyone knows that partial hole will cause a series of problems, such as: rods, cages, cast pipes, etc... In some geology, if the pressure is too fast, it will lead to partial holes.

Unlocking: Unlocking the machine-locked drill pipe requires resistance to fix the drill bucket. The torque resistance is mainly generated by pressurization, so pressurization becomes the key to unlocking (it is not necessary to pressurize when unlocking), control the pressurization intensity and pressurization time, and prepare for unlocking Preparation, which can effectively prevent the rod from being caused by the machine lock.

4. Prevent smashing rods

Use friction drill rods and segmented machine-locked drill rods (unlocked state), especially when the ground is hard or slippage is not possible, almost all operators will choose long strokes to continuously pressurize. The pressurization stroke is not proportional, so the inner drill pipe is jacked up. When the pressurization stops or reverses, the jacked up drill pipe falls off, damaging the drill pipe or the pressurizing cylinder.

Summarize:

The rotary drilling rig realizes drilling through pressurization and torque. Both pressurization and torque are indispensable, but the torque load is generated by the pressurized cutting first. Therefore, the pressurization is the largest in all the main working conditions of rotary excavation, so The best performance of the drilling rig can only be exerted by controlling the strength of the pressing force and the pressing time.