Fully Rotating PDC Cutter Gaining Momentum: Conquering Frictional Heat in Hard/Abrasive Formations Improves Drilling Efficiency

Zhang, Youhe; Burhan, Yuri; Chen, Chen; Tammineni, Sandeep; Durairajan, Bala; Mathanagopalan, Siva; Ford, Robert

doi:10.2118/166465-ms

Cited by 9 publications

(5 citation statements)

References 6 publications

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“…Rock failure is a process, in which the hardness of rock decreases continuously and eventually leads to rock failure. The solid line in Figure 3 represents the stress-strain relationship of the damaged material, [15][16][17] while the dotted line represents the stress-strain relationship of the material without damage. Point A is where the damage initiation occurs and the yield stress is s yo at that point.…”

Section: Rock-breaking Efficiency Of the Cutters In The Hybrid Bitmentioning

confidence: 99%

“…On the other hand, velocity, acceleration, and kinetic equations of the hybrid bit cutter are established based on the composite kinematics model, based on which the dynamic rock-breaking process of the hybrid bit is researched by utilizing the numerical simulation method. [13][14][15][16][17][18][19][20] Structural characteristics and working principle of the hybrid bit…”

Section: Introductionmentioning

confidence: 99%

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Working characteristics research on the impacting–cutting hybrid bit

Huang

Yang

2019

Advances in Mechanical Engineering

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In order to improve the drilling efficiency of bit drilling in poor-drillability formation, the authors of this article put forward a cutting-percussion hybrid bit, the fixed-cutting units and impact-crushing units of which are mutually independent and are able to work in parallel. Through finite element analysis, it is concluded that the impact teeth will degenerate the material and mechanical properties of the rock, and that the polycrystalline diamond compact cutters will remove the pre-damaged rock with relatively low energy consumption, thus improving the rock-breaking efficiency of the bit. Moreover, on the basis of the geometrical and kinematical characteristics of the hybrid bit, geometrical relationships between the teeth and the bit body, as well as the kinematics and kinetics of the teeth, are studied in compound coordinate systems. Furthermore, by programming in MATLAB, the rock-breaking process of the hybrid bit is simulated and the simulation results consist of the bottom-hole profile, cutting area, cutting volume, and cutting force of the cutters, providing the theoretical basis for the research and development of the hybrid bit.

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Section: Rock-breaking Efficiency Of the Cutters In The Hybrid Bitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Working characteristics research on the impacting–cutting hybrid bit

Huang

Yang

2019

Advances in Mechanical Engineering

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“…However, the conditions of deep strata are often complicated. When drilling in uneven or alternate soft and hard strata, the bit will bear large bit weight and torque, resulting in severe vibration of the bit, which directly leads to the abnormal fatigue impact failure of the PDC bit cutting structure, the rapid failure of the drill bit, the obvious decline in drilling speed, and the significant increase in drilling costs [1][2][3][4][5] . According to statistics, the bit cost accounts for more than 20% of the drilling operation cost [6] .…”

Section: Introductionmentioning

confidence: 99%

Experimental study on PDC single-tooth flexible vibration reduction effect

Haitao,

Zhou,

Jia

et al. 2023

Preprint

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In oil and gas drilling engineering, when PDC bit is drilled into inhomogeneous strata, soft and hard alternating strata, and directional drilling and other complex working conditions, it often encounters frequent impact loads, resulting in abnormal failure accidents, which greatly reduces the performance of the bit. The technical concept of flexible cutting rock breaking is to reduce the stiffness by setting elastic elements, reduce the impact load amplitude suffered in the cutting process to a certain range, and achieve the purpose of extending the service life of the bit. The effects of cutting depth, rake angle and disc spring series combination on the damping effect of flexible damping unit are analyzed through experiments on limestone. The results show that the flexible vibration reduction cutting can effectively reduce the peak cutting load and load fluctuation by 20%~35%. When the flexible tolerance ratio is near 67.6%, the flexible vibration damping effect is the best. The effect of flexible vibration reduction is positively correlated with the combined stiffness of the disc spring and the rake angle. The optimum stiffness combination of the elastic elements is 2 A-type disc springs in series and the optimum rake angle is 15°.

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“…El éxito de esta tecnología, ha sido reportado por otros autores a nivel mundial (Teng et al, 2015;Zhang et al, 2013)which is far to meet the economic requirements of oil company, due to its unique drilling challenges caused by the highsteep structure (maximum dip angle 80°. 4.…”

Section: Introductionmentioning

confidence: 99%

Retos y soluciones de ingeniería en el diseño de un re-entry exploratorio desde el revestimiento intermedio en la cuenca sub-andina colombiana: caso de estudio

Montes-Humánez¹,

Sarmiento²,

Tovar³

et al. 2021

Rev. fuentes reventón enrg.

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Las formaciones y estructuras en Niscota, campo en exploración en la cuenca sub-andina Colombiana, se caracterizan por su alta complejidad tectónica-geomecánica y sedimentológica, al igual que sus vecinos del sur, Pauto y Floreña. Esto conlleva a que los proyectos de exploración (y especialmente la perforación de pozos) sean costosos, demorados y con estructuras de riesgos con impactos elevados (evaluados en términos de tiempo y costo). Una solución para la reducción de costos en proyectos de exploración, es la re-utilización de pozos existentes mediante proyectos de reacceso con desplazamientos significativos, apuntando a direcciones distintas de la estructura en exploración. No obstante, este tipo de prospectos, conllevan a afrontar retos técnicos, operacionales y organizacionales, para los cuales se requiere un detalle de ingeniería y madurez organizacional importante. En este artículo, presentamos un caso de estudio, en el cual se dio soluciones para los siguientes retos: Evaluación del punto de asentamiento de la cuchara de desviación y los riesgos asociados; evaluación del riesgo de fatiga de la sarta durante las operaciones de molienda y posteriores; manejo de recortes de metal de la ventana en revestimiento de 11.75 in.; mapa de parámetros de perforación de ventana en revestimiento de 11.75 in.; perforación en dirección ortogonal al buzamiento en zona fallada; perforación en 10.625 in. Con curvaturas mayores a 4.5°/100 ft en roca dura e intercalada y manejo de incertidumbre geológica en zonas de baja resolución sísmica. Adicionalmente, se presentan los factores de éxito, desde el punto de vista de gerencia de proyecto y seguridad de procesos, que permitieron un valor ganado satisfactorio. Finalmente, las soluciones propuestas a los retos mencionados y la gestión eficiente del proyecto, permitieron lograr el menor tiempo no productivo (NPT) del campo incluso comparado con proyectos similares en los campos análogos del sur (hasta un 7% menos), y ahorros de 1.7 millones de dólares.

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Fully Rotating PDC Cutter Gaining Momentum: Conquering Frictional Heat in Hard/Abrasive Formations Improves Drilling Efficiency

Cited by 9 publications

References 6 publications

Working characteristics research on the impacting–cutting hybrid bit

Working characteristics research on the impacting–cutting hybrid bit

Experimental study on PDC single-tooth flexible vibration reduction effect

Retos y soluciones de ingeniería en el diseño de un re-entry exploratorio desde el revestimiento intermedio en la cuenca sub-andina colombiana: caso de estudio

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