The invention relates to a method for drilling holes in masonry or concrete by means of a hollow drill which can be connected via an intermediate piece to the rotating shank of a drilling machine. The intermediate piece is mounted in a sleeve, forming a hollow space, and is provided with ...
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THE DRILL RIGS ARE MOUNTED ON TRUCKS SO THE HOLES CAN BORED AT A 45 DEGREE ANGLE /BY TILTING THE BACK OF THE TRUCK/ AN... B Caplan 被引量: 0发表: 1965年 Tubular sawing system for making holes in or cutting out cores from concrete walls or walls made of concrete blocks The hole ...
Low WOB allows straight BHA while drilling, resulting in straight holes drilled. However, crooked holes are occasionally reported from gas drilling operations. These are usually the cases where conventional rock bits are used plus high injection rates of gas. In these situations, bottom-hole washout...
Conventional tunneling has the following steps (Fig. 4.21): Sign in to download full-size image Figure 4.21. General procedure of drill-and-blast method. 1. drilling of blast holes, 2. charging, 3. ignition, 4. ventilation, 5. mucking: loading and hauling, 6. scaling, 7. temporary ...
pile, one by one in the inserted sheet pile playing milled groove is formed around sheet weir; then in the milling bath, the steel sheet pile cofferdam located outward compaction bag filled with the clay; and finally pouring concrete inside the back cover back cover sheet pile cofferdam ...
Concrete Diamond Core Drill Bit 68mm 82mm for Drilling Reinforced Concrete Stone Brick Wall Hard Rock Holes, Find Details and Price about Drilling Tools Concrete Hole Saw from Concrete Diamond Core Drill Bit 68mm 82mm for Drilling Reinforced Concre...
MOQ:1 piece;Arbor Diameter:14mm-350mm;Type:concrete wall Diamond drill;Machine:Hand held drill/Bench drill machine;Advantage:longer working life and durable;Shank Diameter:1 1/4 UNC female thread;Usage:For Granite ,stone ,concrete driling holes;Process:S
Application material:Reinforced concrete;Rated voltage:220V;Drilling type:wet drilling;Connection:1-1/4 -7/M22;Power:4200w;None load speed:300r/600r;Drilling depth:400mm;Packing:carton box;Max. Drilling Diameter:300mm;Wheels:Y;Grade:Industrial;Warranty:1
Laser drilling can be carried out in a number of ways including single pulse drilling, percussion drilling, trepanning and helical drilling. Trepanning and helical drilling usually provide higher quality holes at the cost of drilling time. While percussion drilling provides the advantages of higher dri...