Today, the Shandong SDLQ rotary drilling rig editor will share a veteran operator's experience with rotary drilling rig drilling methods, essential knowledge for rotary drilling apprentices.#drilling rig india#
Prescribing the right solution is key! In addition to selecting a rotary drilling rig and drill bit based on the geological conditions and site requirements, it's also important to understand the type and strength of the geology being drilled, and which drilling method to use. Choosing the right one will be most effective, minimize wear and tear, and protect the rig and drill bit. This requires extensive operator experience. Of course, it also requires more operators to learn and improve their skills.
1. Cutting Drilling:#drilling rig india#
Cutting drilling uses bucket teeth, a double-bottomed sand bucket, and friction-type drill pipe. This allows for relatively stable drilling in low-resistance formations, typically with a geological strength of less than 400 kPa, such as mud, silt, and sand. Rotating the bucket teeth reduces resistance and increases drilling speed.
2. Crushing Drilling:
Crushing drilling uses picks, typically using a double-bottomed rock-entry drill bucket. Depending on the geological strength, friction-type or mechanically locked drill pipe can be configured. This drilling method can penetrate gravel, mudstone, sandstone, shale, and moderately weathered rock with a strength of 500 kPa to 1000 kPa. Crushing drilling is achieved by applying pressure to the alloy points on the pick teeth. 3. Toggle Drilling
Drills can be used with double-bottom sand bailing and double-bottom rock drilling buckets, and can also be used with Bao'e teeth. Depending on the geological type, the drilling method will vary. For example, in pebbles, where the pebbles are irregularly arranged and difficult to cut or crush, toggle drilling can be used. The drill pipe is suspended by the main reel, and the pebbles are toggled with the drill bit tip. Once the pebbles are loosened, the drill bucket is lowered into the floating position. This method mitigates the impact of the pebbles' strength and vibration.
4. Grinding Drilling:
Drilling with a rock drill and a toothed spindle drill, coupled with a machine-locked drill pipe, drills into rock formations calculated based on a single-cycle compressive strength ranging from several MPa to tens of MPa. This method typically involves drilling end-bearing piles. The drill enters the rock through circumferential cutting with the drill pipe, or through grinding with the toothed spindle drill. Depending on the rock formation's type, strength, brittleness, and cracks, crushing is possible.
This is merely a guide for operators, and the information presented here is not comprehensive. The key is practice, learning through experience, and supplemented by reference to reference materials to achieve mastery. As the saying goes, more skills are better, and having more good skills will be more valuable in the future.#drilling rig india#
