Original title: The strongest rotary drilling arrangement in history, if you don't know, the construction will be in vain! This article has sorted out the characteristics and scope of application of all rotary drilling tools. You can select and use these drilling tools according to their characteristics during construction. It is strongly recommended for collection! Category I: rotary drilling bucket A: Rock-socketed sand hopper Features: The main body type is the same as the sand layer drilling bucket, but the cutting tools are different. The cutting teeth can be all adopted, and the combined teeth can also be adopted. Applicable strata: soft and hard strata and complex strata such as sandy soil layer with high water content, muddy clay, dense clay, sandy gravel layer, pebble gravel layer, shell layer, iron plate sand, high strength frozen soil, strongly ~ moderately weathered rock stratum, etc. B: bailing bucket Expand the full text Double bottom bailing bit Features: There are two bottom plates under the barrel, the upper and lower bottom plates are connected by the central suspension shaft, and they can rotate a certain angle relatively to realize the opening and closing of the soil inlet at the bottom of the bucket. For the stratum which is easy to suck and drill, the straight-through gas bit can be specially designed. Applicable strata: loose soil,dth drill bits, sandy soil layer with high water content, muddy loam, gravel layer, loose frozen soil and other strata with loose structure and low extraction strength. φ2000 sand hopper (upper form) φ2000 Bao'e tooth sand hopper (middle and lower shape) Double-bottom sand hopper for hole cleaning Application of hole cleaning sand hopper: it is used to remove the sediment in the hole. C: Soil drilling bucket Rotary soil layer drilling bucket Features: single floor, supporting the use of wear-resistant alloy steel shovel type bucket teeth, to achieve rapid drilling. Applicable strata: silt,fastest dth hammer, muddy clay, clay, plastic frozen soil, massive sandy soil, weathered soft bedrock and other strata with low strength and difficult to loosen structure after being disturbed. Type II: rotary drilling short auger bit A: Rock-socketed screw Monocone monospiral rock helix Double-flat-head single-screw rock-socketed bit Biconical monospiral rock helix Bipyramidal bispiral rock spiral φ 2500 bipyramidal bispiral rock helix Double flat-headed rock spiral Features: Helical blade can be conical head or flat head, cutting tool is bullet-shaped pick, tooth arrangement and helical blade. There are many types according to different strata. Applicable strata: hard soil layer, sandy gravel layer, strongly ~ weakly weathered rock stratum, hard frozen soil with developed joints, etc. B: Soil layer spiral Single-head single-screw soil lay screw drill bit Double-head double-screw soil layer screw bit Features: The spiral blade starts with flat head, and the spiral form can be divided into single-head single-screw, dhd drill bit ,down the hole bit, double-head single-screw and double-head double-screw, on which wear-resistant alloy steel shovel-type bucket teeth are welded. Applicable stratum: the stratum of clay, sandy soil, plastic frozen soil, etc. above the aquifer, the structure of which is not easy to be loosened and the strength of which ingth and loose structure. V19 and V20 rotary bucket teeth T25 straight teeth Type E1500 Shovel B: Pick Strata with high strength shall be used for hard soil layer, sand gravel layer, hard frozen soil, medium hard ~ hard rock stratum, weakly ~ moderately weathered rock stratum,mining dth bit, etc. U84 long pick Type BKH22 stub pick C: ZHC combination tooth Features: It is a combination of relieving teeth and cutting teeth, which are welded together. Applicable stratum: applicable to all kinds of strata, especially for the strong weathered layer with slightly loose structure and the sand and gravel layer. END Source: Foundation Engineering Return to Sohu to see more Responsible Editor:. wt-dthtools.com