Modeling pellet impact drilling process

All-Russian Scientific Conference with International Participation on Contemporary Issues of Hydrogeology, Engineering Geology and Hydrogeoecology in Eurasia

Kovalyov, A.V.^1 ; Ryabchikov, S.Ya.^1 ; Isaev, Ye.D.^1 ; Ulyanova, O.S.^1

National Research Tomsk Polytechnic University, 30 Lenina Ave., Tomsk

634050, Russia^1

关键词: Drilling operation;    Drilling process;    Drilling speed;    Engineering design;    Principle component;    Rate of penetration;    Rock destruction;    Technical conditions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/33/1/012030/pdf
DOI  :  10.1088/1755-1315/33/1/012030

来源: IOP

【 摘 要 】

The paper describes pellet impact drilling which could be used to increase the drilling speed and the rate of penetration when drilling hard rocks. Pellet impact drilling implies rock destruction by metal pellets with high kinetic energy in the immediate vicinity of the earth formation encountered. The pellets are circulated in the bottom hole by a high velocity fluid jet, which is the principle component of the ejector pellet impact drill bit. The experiments conducted has allowed modeling the process of pellet impact drilling, which creates the scientific and methodological basis for engineering design of drilling operations under different geo-technical conditions.