Rotary drilling rig bit categories and uses [Tungsten Carbide Inserts]
Rotary drilling rig bit categories and uses
This article is organized and shared by Merit Drilling Rig Maintenance Network
Rotary drilling rig bit categories and uses:
Single-head auger (SSA) is a single-head single-screw auger bit. The single-head auger bit is designed for rock formations and soil layers above the water level, as shown in Figure 1..SSA spiral drill bits are divided into three types: SSA-I (single-head soil spiral drill), SSA-II (mixed single-head spiral drill) and SSA-III (single-head rock spiral drill), as shown in Figure 2..;
Figure 1 Schematic diagram of spiral drill
a) Single-head spiral drill bit;
b) Double-head spiral drill bit
Double-headed auger (DSA) is suitable for large-diameter and rock drilling. It is divided into double-headed single-screw and double-headed double-screw. DSA almost includes all types and specifications required..According to different soil quality, DSA is divided into: DSA-I (double-headed soil spiral drill), DSA-H (double-headed harder rock spiral drill), DSA-III (double-headed cone spiral drill), DSA-IV (double-head soft Rock auger) and DSA-V (double-headed hard rock auger) five types, see Figure 3.;
Figure 2 Schematic diagram of single-head spiral drill
Single-head soil auger bit; b) Mixed layer single-head auger bit; c) Single-head rock auger bit;
Figure 3 Schematic diagram of double-head spiral drill bit
a) Double-headed soil auger bit; b) Double-headed harder rock auger bit; c) Double-headed cone auger bit, d) Double-headed soft rock auger bit; e) Double-headed hard rock auger.
a) Rock auger bit.The tip of the rock auger bit is inlaid and welded with tungsten-cobalt carbide picks, which are mainly used for weathering bedrock, better cemented pebble stratum and various soil permafrost layers.
b) Cone screw rock drill bit.Used for harder bedrock, better cemented pebble stratum and hard permafrost.Among them, the single screw bit has a fast drilling speed, easy slag removal, and low rotation resistance.The double screw bit has good guiding performance and strong soil carrying capacity.Cone snails can generally be divided into 180 degrees, 270 degrees and 360 degrees. The harder the rock, the greater the taper of the head..
c) Straight screw rock drill bit.There are single head single screw, double head single screw and double head double screw.For drilling in medium-hard to hard weathered stratum and frozen soil.Compared with cone snails, it has better guidance and strong soil-carrying ability, but the rotation resistance is greater.Single screw bit has fast drilling speed, easy slag removal and low rotation resistance.The double screw bit has good guiding performance, strong soil carrying capacity, but large rotation resistance.
d) Soil spiral drill.The cutting tools are shovel-shaped wear-resistant alloy teeth or bucket teeth plus picks, which are mainly used for soil layers above the groundwater level, sand layers, dense sand layers with a small amount of clay, and gravel layers with small particle diameters..There are single head single screw, double head single screw and double head double screw.The single screw bit is suitable for drilling into the gravel layer and the clay layer with good cementation due to easy slag removal and low rotation resistance; the double screw bit has strong soil carrying capacity and good guiding performance, suitable for drilling into loose formations and soft and hard interbedded formations.
Rotary drilling rig drill bit category and use operating rules and use precautions:
a) Before drilling a new drilling tool, first check whether the drill teeth are complete and whether the connection is firm. Press lightly and slowly drill during operation..
b) Because this type of drill bit drills into the hard strata, it must not be drilled at a high bit weight and high speed when Thread drill bits. When it is difficult to drill a large boulder, it is necessary to lift a section of the drill tool and drill with light pressure. Time.
c)-Generally, the drill can be lifted by 2 to 3 pitch lengths under pressure drilling. The drill must be lifted slowly to prevent the collision between the drill bit and the hole wall and cause soil leakage and mechanical accidents in the hole..
d) In case of jamming when lifting the drill, move the drill tool up and down and rotate slowly at the place where the jam is encountered. Lift the drill after the jam is released. Do not lift the drill forcefully..
e) Reverse the drill tool when unloading soil, and it is strictly forbidden to lift up or down or swing left and right to hit other fixed objects to unload the soil.
f) It is found that the drill teeth have been severely worn or damaged, and the drill teeth of the same specification should be replaced in time.
g) If foreign objects are found in the hole, it is strictly forbidden to drill down or use the drill as an accident handling tool to handle the accident.
Merit Drilling Rig Maintenance Network shares the article "Types and Uses of Rotary Drill Bits".
This article is organized and shared by Merit Drilling Rig Maintenance Network
Rotary drilling rig bit categories and uses:
Single-head auger (SSA) is a single-head single-screw auger bit. The single-head auger bit is designed for rock formations and soil layers above the water level, as shown in Figure 1..SSA spiral drill bits are divided into three types: SSA-I (single-head soil spiral drill), SSA-II (mixed single-head spiral drill) and SSA-III (single-head rock spiral drill), as shown in Figure 2..;
Figure 1 Schematic diagram of spiral drill
a) Single-head spiral drill bit;
b) Double-head spiral drill bit
Double-headed auger (DSA) is suitable for large-diameter and rock drilling. It is divided into double-headed single-screw and double-headed double-screw. DSA almost includes all types and specifications required..According to different soil quality, DSA is divided into: DSA-I (double-headed soil spiral drill), DSA-H (double-headed harder rock spiral drill), DSA-III (double-headed cone spiral drill), DSA-IV (double-head soft Rock auger) and DSA-V (double-headed hard rock auger) five types, see Figure 3.;
Figure 2 Schematic diagram of single-head spiral drill
Single-head soil auger bit; b) Mixed layer single-head auger bit; c) Single-head rock auger bit;
Figure 3 Schematic diagram of double-head spiral drill bit
a) Double-headed soil auger bit; b) Double-headed harder rock auger bit; c) Double-headed cone auger bit, d) Double-headed soft rock auger bit; e) Double-headed hard rock auger.
a) Rock auger bit.The tip of the rock auger bit is inlaid and welded with tungsten-cobalt carbide picks, which are mainly used for weathering bedrock, better cemented pebble stratum and various soil permafrost layers.
b) Cone screw rock drill bit.Used for harder bedrock, better cemented pebble stratum and hard permafrost.Among them, the single screw bit has a fast drilling speed, easy slag removal, and low rotation resistance.The double screw bit has good guiding performance and strong soil carrying capacity.Cone snails can generally be divided into 180 degrees, 270 degrees and 360 degrees. The harder the rock, the greater the taper of the head..
c) Straight screw rock drill bit.There are single head single screw, double head single screw and double head double screw.For drilling in medium-hard to hard weathered stratum and frozen soil.Compared with cone snails, it has better guidance and strong soil-carrying ability, but the rotation resistance is greater.Single screw bit has fast drilling speed, easy slag removal and low rotation resistance.The double screw bit has good guiding performance, strong soil carrying capacity, but large rotation resistance.
d) Soil spiral drill.The cutting tools are shovel-shaped wear-resistant alloy teeth or bucket teeth plus picks, which are mainly used for soil layers above the groundwater level, sand layers, dense sand layers with a small amount of clay, and gravel layers with small particle diameters..There are single head single screw, double head single screw and double head double screw.The single screw bit is suitable for drilling into the gravel layer and the clay layer with good cementation due to easy slag removal and low rotation resistance; the double screw bit has strong soil carrying capacity and good guiding performance, suitable for drilling into loose formations and soft and hard interbedded formations.
Rotary drilling rig drill bit category and use operating rules and use precautions:
a) Before drilling a new drilling tool, first check whether the drill teeth are complete and whether the connection is firm. Press lightly and slowly drill during operation..
b) Because this type of drill bit drills into the hard strata, it must not be drilled at a high bit weight and high speed when Thread drill bits. When it is difficult to drill a large boulder, it is necessary to lift a section of the drill tool and drill with light pressure. Time.
c)-Generally, the drill can be lifted by 2 to 3 pitch lengths under pressure drilling. The drill must be lifted slowly to prevent the collision between the drill bit and the hole wall and cause soil leakage and mechanical accidents in the hole..
d) In case of jamming when lifting the drill, move the drill tool up and down and rotate slowly at the place where the jam is encountered. Lift the drill after the jam is released. Do not lift the drill forcefully..
e) Reverse the drill tool when unloading soil, and it is strictly forbidden to lift up or down or swing left and right to hit other fixed objects to unload the soil.
f) It is found that the drill teeth have been severely worn or damaged, and the drill teeth of the same specification should be replaced in time.
g) If foreign objects are found in the hole, it is strictly forbidden to drill down or use the drill as an accident handling tool to handle the accident.
Merit Drilling Rig Maintenance Network shares the article "Types and Uses of Rotary Drill Bits".
