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Research on the Effect of Combined Cutters of PDC Bit on Cutting Efficiency
Polycrystalline diamond compact (PDC) bits have changed the way to cut rock comparing to the roller cone bits, occupying a large market in oil and...
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Experimental Study of the Rock Cutting Mechanism with PDC Cutter Under Confining Pressure Condition
The existence of confining pressure is an important factor that can’t be ignored in rock cutting process. Rocks show high strength and strong...
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Experimental Investigation into Mixed Tool Cutting of Granite with Stinger PDC Cutters and Conventional PDC Cutters
The Stinger PDC cutter has superior impact resistance, wear resistance, and rock-breaking efficiency compared to the conventional PDC cutter. Thus,...
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The Rock Fragmentation Mechanism in Rock Cutting with PDC Cutter Under Hydrostatic Pressures
Drilling into deep formation characterized by high formation and hydrostatic pressures often brings great challenges to oil and gas industry and the...
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Cutting mechanism of a special 3D concave-shaped PDC cutter applicable to the Weiyuan shale
The Weiyuan shale gas field faces problems of long drilling cycles and high development costs. Improving the drilling efficiency of polycrystalline...
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The Rock-Breaking Mechanism of Thermal Spalling-Assisted Rock Cutting by PDC Cutter
The challenges pertaining to low rock-breaking efficiency and high drilling cost in deep hard formation and hot dry rock (HDR) are highly pronounced....
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Determination of Internal Friction Angle of Rocks Using Scratch Test with a Blunt PDC Cutter
The current paper is prepared with the objective of providing experimental evidence that the internal friction angle of rocks can be assessed using a...
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Experimental study on rock-breaking mechanism of micro-coring PDC bit
In this paper, in order to study the rock-breaking mechanism of the micro-coring PDC bit, a series of unit breaking experiments...
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The Role of the White Pumice Clasts in the 79 AD Vesuvius Post-plinian PDC Deposits
Large explosive eruptions often generate compositionally zoned ignimbrites that provide evidence for the vertical stratification in the magma chamber...
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PDC bit optimization scheme for tight oil reservoirs in the Jidong Oilfield based on rock anti-drilling characteristics
The tight oil reservoir rocks in the Jidong Oilfield are generally characterized by high hardness, strong abrasiveness, and extremely unevenness,...
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Calibration strategies of PDC kinetic energy models and their application to the construction of hazard maps
The availability of computer tools able to describe the behavior of pyroclastic density currents (PDCs) with uncertainty quantification is of primary...
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3D Cutting Force Model of a Stinger PDC Cutter: Considering Confining Pressure and the Thermal Stress
Cutting force prediction of the Stinger PDC cutter is a critically important work for the hybrid PDC bit design, which will directly affect the...
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Abrasiveness evaluation of complex strata based on PDC special energy consumption
The rock abrasiveness is determined with various methods, which results in no uniform standard formed. In order to predict the PDC bit wear and the...
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Experiments and 3D Numerical Simulation Study on the Vibration Characteristics of PDC Bits During Rock Breaking
During oil and gas drilling, the harmful vibration of the drill string greatly reduces drilling efficiency. The interaction between the drill bit and...
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Field Test Research on Bit Speed Increase of Risk Exploration Well in Daqing Paleo Central Uplift Zone
The lithology of deep natural gas reservoir in risk exploration well of Daqing paleo central uplift belt is breccia, granite, rhyolite, phyllite,...
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Assessing the Pyroclastic Density Current Hazards at Merapi: From Field Data to Numerical Simulations and Hazard Maps
Merapi is considered as the most active and the most frequently eruptive volcano in Indonesia and is responsible for more than 5200 casualties since...
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Distal Pyroclastic Current Deposits of the 79 AD Vesuvius Eruption on the Mountains Adjacent to the Campanian Plain
Literature data show that the two most widespread Vesuvius 79 AD pyroclastic density currents (PDCs) have been traced over a large area around the...
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Numerical Investigation of the Effect of Pre-induced Cracks on Hard Rock Cutting Using Finite Element Analysis
This paper presents a numerical investigation into the effects of pre-induced cracks on polycrystalline diamond compact (PDC) rock drilling processes...
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Dynamic pressure evolution within the 18 May 1980 Mount St. Helens pyroclastic density current: evidence from tree damage
The effects of pyroclastic density currents (PDCs) can be devastating, so understanding their internal dynamics and evolution is important for hazard...
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