Mobile phone must see! Introduction of various drilling methods of rotary drilling rig.Nigeria Excavator sprocket
An operator of a rotary drilling rig should always know the type and strength of the geology being drilled at this time, and what kind of drill pipe and drilling tool should be used, and what drilling method is effective, and only in this way can it be controlled well. Operation, lower loads, lower wear and faster footage.Nigeria Excavator sprocket
Rotary drilling rigs can be divided into four drilling methods according to geological conditions: cutting, crushing, plucking and grinding.
1. Cutting type:
Bucket teeth are used for cutting and drilling, and double bottom salvage buckets with friction drill pipes are used to drill relatively stable formations with low resistance, such as mud layers, silt and sand layers with general geological strength within 400 kPa, through the bucket teeth Rotary cutting reduces drag and increases rig speed.Nigeria Excavator sprocket
2. Broken type:
The crushing drilling uses pick drilling, most of which use double-bottomed rock drilling buckets, and can be equipped with friction resistance or machine-locked drill pipe according to the geological strength, and can drill gravel, mudstone, sandstone, Shale and medium weathering, etc., through the pressure transfer to the alloy point on the pick to achieve crushing drilling.Nigeria Excavator sprocket
3. Toggle
It can be used with double-bottom sand and double-bottom drilling buckets, and can also be used with Bauer teeth. Due to the different types of geology, the drilling method will change accordingly. For crushing, it can be drilled with a toggle type, the drill pipe is hung with the main coil, the pebble is toggled with the tooth tip of the drill bucket, and the pebble is loosened and the drill bucket is floated down. This operation method is to avoid the strength and vibration of the pebble.Nigeria Excavator sprocket
4. Grinding type:
Using the rock drill and the tooth shaft drill, with the machine-lock drill pipe to drill into the rock formation calculated by the single-cycle compressive strength, the strength is from several MPa to several tens of MPa, usually the rock end bearing pile, through the barrel drill Circumcision and grinding into the rock, or grinding and drilling through the tooth shaft drill, at the same time, according to the type, strength, brittleness and fissure of the rock formation, the possibility of fragmentation is not excluded.Nigeria Excavator sprocket
Post time: Jul-28-2022
