Results 121 to 130 of about 14,166 (227)

Genetic evidence for a periplasmic protein as a third component for a subset of NtrYX family two-component systems. [PDF]

J Bacteriol
Wolber AR, McKay LS, Johnson RM, Hameed ZT, Mote KB, Julio SM, Cotter PA.   +6 more
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

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

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

Numerical simulation study of gas-solid two-phase flow characteristics in borehole sampling of coal cuttings. [PDF]

PLoS One
Xue S, Zhang L, Zheng X, Gao C, Liu S.
europepmc   +1 more source

Challenges of drilling Iran's deepest surface hole in the saddle section of Changuleh oilfield with complex structure and pressure regimes. [PDF]

Sci Rep
Jamshidi E, Saen S, Golshaghagh J, Kianoush P, Adib A, Mohammadi A.   +5 more
europepmc   +1 more source

The impact of multidirectional excitation on the stick-slip vibration characteristics of a drill string. [PDF]

Sci Rep
Hongshan Z, Wenchang W, Kaixian A.
europepmc   +1 more source

Numerical Simulation on Rock-Breaking Performance of Prismatic PDC Cutter

Shiyou jixie
Conventional PDC bit exhibits severe wear,difficult penetration and low rate of penetration(ROP)in abrasive formations.Prismatic PDC cutter is superior to conventional planar PDC cutter in rock-breaking performance,but there is a lack of basis for the ...
Cheng Wei, Xing Xuesong, Lou Yishan, Zhu Liang, Yin Biao   +4 more
doaj  

Optimizing polycrystalline diamond compact bit selection and drilling parameters for deviated wells in the Majnoon Field, Iraq. [PDF]

Sci Rep
Al-Dujaili AN, Asad MS, Saeed N, Tileuberdi N.   +3 more
europepmc   +1 more source