Results 111 to 120 of about 138 (127)
Some of the next articles are maybe not open access.
Chemistry and Technology of Fuels and Oils, 2017
It is generally recognized that stick-slip motion of polycrystalline diamond compact (PDC) bits is responsible for the low rate of penetration (ROP) and premature wearing of drill bits while drilling hard rock formations. An innovative tool designated combined percussion jet (CPJ) was developed in this work to solve the problem.
Chunqing Zha +5 more
openaire +1 more source
It is generally recognized that stick-slip motion of polycrystalline diamond compact (PDC) bits is responsible for the low rate of penetration (ROP) and premature wearing of drill bits while drilling hard rock formations. An innovative tool designated combined percussion jet (CPJ) was developed in this work to solve the problem.
Chunqing Zha +5 more
openaire +1 more source
Modelling of vibro-impact penetration of self-exciting percussive-rotary drill bit
Journal of Sound and Vibration, 2004Abstract The penetration of a drilling tool into a hard medium under periodic impact action is analyzed and the simulation model presented. This is further development of previously investigated model of a self-excited percussive-rotary drilling system.
A.D. Batako +2 more
openaire +1 more source
Self-Oscillation Pulsed Percussive Rotary Tool Enhances Drilling Through Hard Igneous Formations
IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition, 2012Abstract As hydrocarbon development goes deeper and more complex in Songliao Basin, drilling engineering has been put at the forefront of cost reduction and efficiency enhancement. The unique challenges resulted from high abrasiveness in hard igneous formations have triggered years of efforts for cost-effective percussive rotary drilling
Rongchao Cheng +5 more
openaire +1 more source
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2008
Stick—slip-induced vibration in drilling has a detrimental effect on the drilling system and may lead to the failure of the drill string. This study is a further development of a friction-driven vibro-impact system which was investigated previously. The system used the stick—slip properties to generate a vibratory motion of a hammer that collides with ...
A D L Batako, P T Piiroinen
openaire +1 more source
Stick—slip-induced vibration in drilling has a detrimental effect on the drilling system and may lead to the failure of the drill string. This study is a further development of a friction-driven vibro-impact system which was investigated previously. The system used the stick—slip properties to generate a vibratory motion of a hammer that collides with ...
A D L Batako, P T Piiroinen
openaire +1 more source
Assessment of Rock Strength by a New Drillability Index in Precussive-Rotary Drilling
Bulletin of Engineering Geology and the Environment, 2023Ruilang Cao, Shangxin Feng
openaire +1 more source
Application of Percussive-Rotary Drilling Technology in Petroleum Drilling
Foreign Language Science and Technology Journal Database Engineering Technology, 2021openaire +1 more source
Improving shearing efficiency of percussion rotary drill bits
Mining informational and analytical bulletin, 2020A.A. Grinko, N.I. Sysoev, D.A. Grinko
openaire +1 more source
Improving Drilling Technology in Percussive Rotary Drilling
Journal of Superhard MaterialsYe. A. Koroviaka, S. O. Shypunov
openaire +1 more source
Determination of Efficient Rotary Percussive Drilling Techniques for Strong Rocks
Journal of Mining Science, 2021V N Karpov
exaly
A bit–rock interaction model for rotary–percussive drilling
International Journal of Rock Mechanics and Minings Sciences, 2011exaly