Conventional drilling
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Experimental research on assessment of concrete’s compressive strength of centrifugal concrete piles
Centrifugal concrete products are manufactured using specific technology that changes the concrete proportion during consolidation. The bleeding of water reduces the water-to-cement ratio and increases the compressive strength of concrete. This affects the strength of the concrete determined on conventional casted cylinders, centrifuged hollow cylinders, and drilled cores from piles.
11p 
visarada
28-04-2025
1
1
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Managed pressure drilling: Constant bottomhole pressure (CBHP) – Pressurized mud cap drilling (PMCD) for Thang Long JOC well HSD-BM-6P present the content: introduction to MPD, MPD variants, pressurized mud cap drilling (PMCD), constant bottomhole pressure (CBHP), 8.5” hole preparation and strategy, 8.5” hole decision chart, making a connection,...
40p bachkhinhdaluu
03-12-2021
11
1
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Friction drilling is a green hole-making process that zealously utilizes the heat generated from the friction between the rotating conical tool and workpiece to create a bushing without generating chip. The difficult-to-machine materials with unique metallurgical properties have been developed to meet the demands of extreme applications.
8p tohitohi
19-05-2020
12
1
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