A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Simulation study of new directional drilling PDC bit used in coal mine
During directional drilling, when drilling in hard and multi-interbedded formation, the ordinary flat-bottomed PDC bit wears seriously, in order to solve this problem, a new type of directional drilling PDC bit (straight angle drag PDC bit) is developed, and numerical simulation method is used to analyze the working characteristics of straight angle drag PDC bit. Simulation results show that, comparing with the ordinary flat-bottomed PDC bit, axial force needed by straight angle drag PDC bit reduces by up to 36%, and rock breaking efficiency increases nearly 50%. Also, Φ96 mm straight angle drag PDC bit is produced and field test is carried out; field test results show that: comparing with flat-bottomed PDC bit, bit life expectancy of straight angle drag PDC bit increases more than three times, and rock breaking efficiency increases about two times. So, when drilling in hard and multi-interbedded formation in the process of directional drilling, straight angle drag PDC bit helps to improve bit life and rock breaking efficiency and finally reduces drilling cost.
Simulation study of new directional drilling PDC bit used in coal mine
During directional drilling, when drilling in hard and multi-interbedded formation, the ordinary flat-bottomed PDC bit wears seriously, in order to solve this problem, a new type of directional drilling PDC bit (straight angle drag PDC bit) is developed, and numerical simulation method is used to analyze the working characteristics of straight angle drag PDC bit. Simulation results show that, comparing with the ordinary flat-bottomed PDC bit, axial force needed by straight angle drag PDC bit reduces by up to 36%, and rock breaking efficiency increases nearly 50%. Also, Φ96 mm straight angle drag PDC bit is produced and field test is carried out; field test results show that: comparing with flat-bottomed PDC bit, bit life expectancy of straight angle drag PDC bit increases more than three times, and rock breaking efficiency increases about two times. So, when drilling in hard and multi-interbedded formation in the process of directional drilling, straight angle drag PDC bit helps to improve bit life and rock breaking efficiency and finally reduces drilling cost.
Simulation study of new directional drilling PDC bit used in coal mine
Sun, Rongjun (author) / Ju, Pei (author) / Shi, Zhijun (author)
Geosystem Engineering ; 20 ; 142-148
2017-05-04
7 pages
Article (Journal)
Electronic Resource
English
Grouting and hole-sealing material used for drilling of underground coal mine gas
| European Patent Office | 2015
Development of a New Type of Hydraulic Drilling Car Used in Coal Mine
| British Library Online Contents | 2012
| TIBKAT | 1987