Results 51 to 60 of about 972,039 (207)
Development and testing of a Mudjet-augmented PDC bit. [PDF]
, 2006 This report describes a project to develop technology to integrate passively pulsating, cavitating nozzles within Polycrystalline Diamond Compact (PDC) bits for use with conventional rig pressures to improve the rock-cutting process in geothermal ...
Black, Alan (TerraTek, Inc.) +6 more
core +1 more source
Influence of PDC Cutter Diameter on Cutting Force
Shiyou jixie, 2023 PDC bit design needs to be customized depending upon the formation lithology characteristics, and especially the diameter of PDC cutter is an important parameter in bit design optimization.A series of laboratory simulation tests were conducted to explore
Wei Jiusen +4 more
doaj
Circulating monocyte partitioning and its alteration in hematological chronic neoplasms
Cytometry Part B: Clinical Cytometry, EarlyView.Abstract Circulating monocyte partitioning refers to the relative quantification of the three main monocyte subsets in the peripheral blood, namely classical (cMo), intermediate (iMo), and non‐classical (ncMo) monocytes, as assessed by flow cytometry, a new nomenclature described 15 years ago.
Sihem Tarfi +4 more
wiley +1 more source
PDC drill bit modeling in hard rock
, 2020 The objective of thesis is to develop a detailed PDC drill bit ROP model that can be implemented in a real time drilling optimization system for hard rock application.
Sleeper, Seth
core
Modelling of an effluence of drilling fluid from hydraulic holes of PDC bits [PDF]
Компьютерные исследования и моделирование, 2013 In this article some results of mathematic modelling of an effluence of drilling fluid from hydraulic holes of PDC bit are presented. Distribution of velocity and pressure in borehole bottom are received, and erosion of interior surface of hydraulic ...
Vitaly Anatolevich Bruyaka +3 more
doaj +1 more source
Cytometry Part B: Clinical Cytometry, EarlyView.Abstract Natural killer (NK) cell neoplasms span indolent to highly aggressive entities, and flow cytometric immunophenotyping is central to their detection and classification. However, distinguishing reactive from neoplastic NK cell expansions can be challenging because NK cells lack somatically recombined antigen receptors, and reactive states may ...
Aaron J. Wilk +7 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li +7 more
wiley +1 more source
Effects of Rock/Cutter Friction on PDC Bit Drilling Performance: An Experimental and Theoretical Study. [PDF]
, 1990 A new mechanistic drilling model for PDC bits was derived from the balance of forces acting at the PDC cutter. The model combined the torque and the drilling rate equations, cutter\u27s geometry and rock properties.
Kuru, Ergun
core +1 more source
Applied Bionics and Biomechanics, 2022 PDC (polycrystalline diamond compact) bit is the key equipment for drilling holes inside the rock in oil and mining industry. Inspired by the shape and structure of Capra sibirica horn, a bionic lateral PDC reamer bit with variable lateral reaming radius
Chaoyu Chen +3 more
doaj +1 more source
ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.This work reveals a “Photovoltaic‐Capacitance” coupling mechanism in stacked Ga2O3/ZnO devices, defining the ZnO/graphene interface as a novel Photovoltaic Dynamic‐Capacitor (PDC). The wavelength‐selective bipolar response enables a physical layer secure communication protocol based on ternary optical logic (“1,” “0,” “−1”).
Songqi Zhao +6 more
wiley +1 more source