Results 141 to 150 of about 2,300 (225)

Analysis of Torsional Vibration Characteristics of PDC Bit and Design of the Damping Tool

Shiyou jixie, 2017
In order to suppress the torsional vibration of the PDC bit, the torsion model of PDC bit was established.The force on the PDC cutter during rock breaking was analyzed to attain the relationship between WOB and torque.
Zha Chunqing, Liu Gonghui, Li Jun, Xi Yan, Zhang Tao   +4 more
doaj  

Application of an innovative ridge-ladder-shaped polycrystalline diamond compact cutter to reduce vibration and improve drilling speed. [PDF]

Sci Prog, 2020
Xie D, Huang Z, Yan Y, Ma Y, Yuan Y.
europepmc   +1 more source

Mating strategy predicts gene presence/absence patterns in a genus of simultaneously hermaphroditic flatworms. [PDF]

Evolution, 2022
Wiberg RAW, Viktorin G, Schärer L.
europepmc   +2 more sources

Rake angle optimization for balanced efficiency and durability in PDC cutter cutting granite interaction via infrared thermal dynamics and fragmentation mechanism. [PDF]

Sci Rep
He X, Zheng B, Luo Z, Hu P, Yang Y, Yin G.   +5 more
europepmc   +1 more source

Research on the type and expansion mechanism of internal cracks in rocks under the action of PDC. [PDF]

Sci Rep
Liang Y, Du B, Ren J, Feng S.
europepmc   +1 more source

Predicting porosity in tight sandstone reservoirs based on logging while drilling engineering parameters. [PDF]

Sci Rep
Xue D, Zhang L, Liu Z, Li H, Li J, Jiang C.   +5 more
europepmc   +1 more source

Rotary cutting test on rock-breaking mechanism and efficiency of milled-tooth rolling cutters for shaft sinking by drilling methods. [PDF]

Sci Rep
Wang X, Cheng H, Lin J, Yao Z, Guo L, Zhang L.   +5 more
europepmc   +1 more source

Vibration behavior analysis of reamers based on drill string dynamics. [PDF]

Sci Rep
Fusheng Y, Yuchun K, Bin L, Qianwen C, Ming S.   +4 more
europepmc   +1 more source

Calcium peroxide alleviates the waterlogging stress of rapeseed by improving root growth status in a rice-rape rotation field. [PDF]

Front Plant Sci, 2022
Wang Z, Han Y, Luo S, Rong X, Song H, Jiang N, Li C, Yang L.   +7 more
europepmc   +1 more source

Optimization Design Method of PDC Bit Based on Impact Failure Mechanism

Shiyou jixie
To enhance the anti-failure capability of PDC bits and extend bit service life， the main impact characteristics of PDC cutters in different regions of the bit were investigated.
Shi Jiangang Liu Yingbiao Xi Chuanming Guo Yong Wu Desheng
doaj