Results 131 to 140 of about 56,758 (188)

Surface motion dynamics and swimming control of planar magnetic microswimmers. [PDF]

Sci Rep
Duygu YC, Lee S, Liu A, Cheang UK, Kim MJ.   +4 more
europepmc   +1 more source

Plankton active response to turbulence enables efficient transport. [PDF]

J Exp Biol
DiBenedetto MH, Monthiller R, Eloy C, Mullineaux LS.   +3 more
europepmc   +1 more source

An analytical model for quantitative evaluation of friction drag in directional sliding drilling. [PDF]

Sci Rep
Ma Z, Zhang H, Hu H, Li G, Tian S, Zhang Y, Wang T.   +6 more
europepmc   +1 more source

Optical Blaster: Launching Nanostructured Microrockets out of an Optical Trap by a Single Laser Beam. [PDF]

ACS Nano
Ussembayev Y, Arakawa Y, Beunis F, Spoelstra AB, Bus T, Schenning APHJ, Neyts K.   +6 more
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Tunable 3D optohydrodynamic torques from optical phase gradient-driven colloidal assemblies. [PDF]

Sci Adv
Li X, Liu C, Huang Z, Ng J, Nan F.
europepmc   +1 more source

Tumbleweed-inspired robots with hybrid mobility for terrestrial exploration. [PDF]

Nat Commun
Manoharan S, Lemecho B, Fadlelmula MM, Subramanian V.   +3 more
europepmc   +1 more source

Hybrid Harris Hawks optimization with eagle strategy particle swarm optimization for stability and disturbance rejection in tethered UAV systems. [PDF]

Sci Rep
Ismael AK, Kurnaz S, Basil N.
europepmc   +1 more source

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Torque and Drag Calculations in Multilateral Wells

SPE Nigeria Annual International Conference and Exhibition, 2022
Abstract Multilateral drilling technology has advanced to the point that it is now feasible to explore and extract resources from previously unprofitable reservoirs. It may also help to enhance field development management by allowing for more efficient fluid flow from the formation.
Darlington Etaje, Roman Shor, Reza Lashkari   +2 more
openaire   +1 more source

Dynamic Model for Stiff-String Torque and Drag

SPE Drilling & Completion, 2013
SummaryA dynamic stiff-string torque-and-drag (T&D) model is presented that assumes steady-state motion of the drillstring as its basis for calculations. Results are compared with previously published T&D models that are based on static equilibrium.
Vadim Tikhonov, Khaydar Valiullin, Albert Nurgaleev, Lev Ring, Raju Gandikota, Pavel Chaguine, Curtis Cheatham   +6 more
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