Overview on vertical and directional drilling technologies for the exploration and exploitation of deep petroleum resources

Ma, Tianshou; Chen, Ping; Zhao, Jian

doi:10.1007/s40948-016-0038-y

Cited by 139 publications

(62 citation statements)

References 26 publications

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“…Other applications may be found in petroleum engineering technologies and the energy sector [9,17], deep ground engineering and geothermal engineering [18] as well as understanding energy dissipation mechanisms and damping in soils [19,20] or understanding the mechanisms and modeling stability problems in geotechnical engineering, for example related to landslides [21]. Overall, the understanding of surface properties, processes, interactions and contact mechanics of geological interfaces may be considered as a fundamental step in a variety of problems and applications in geomechanics which are beyond the soil mechanics applications.…”

Section: Introductionmentioning

confidence: 99%

Exploring the Micromechanical Sliding Behavior of Typical Quartz Grains and Completely Decomposed Volcanic Granules Subjected to Repeating Shearing

Sandeep

Senetakis

2017

Energies

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Abstract:The micromechanical behavior at grain contacts subjected to tangential and normal forces is of major importance in geotechnical engineering research and practice. The development of the discrete element method (DEM) over the past three decades necessitated a more systematic study on the experimental grain contact behavior of real soil grains as DEM simulations use as input tangential and normal load-displacement relationships at grain contacts. In this study, experimental results conducted at the City University of Hong Kong are presented exploring the tangential load-displacement behavior of geological materials. The focus of the study is to explore the possible effect of repeating the shearing test to the same grains on the inter-particle coefficient of friction accounting for the level of the applied normal load. Additionally, the study reports on the frictional behavior of different geological materials including quartz sand grains, denoted as Leighton Buzzard sand (LBS) in the study and completely decomposed volcanic granules denoted as CDV. Quartz grains may find applications as proppant in petroleum engineering, whilst the CDV granules consisted of a material taken from a recent landslide in Hong Kong, whose applications are related to debris flow. Through the micromechanical sliding experiments, the inter-particle coefficient of friction was quantified following shearing paths of about 60 to 200 microns. While at the smallest vertical load of 1 N, there was not observed a notable effect of the repeating shearing for the LBS grains, it was noticed that for small to medium vertical loads, between 2 and 5 N, the repeating shearing reduced the friction at the contacts of the LBS grains. This trend was clear between the first and second shearing, but additional cycles did not further alter the frictional response. However, at greater vertical loads, between 7 and 10 N, the results showed a continuous increase in the dynamic inter-particle friction for the LBS grains with repeating shearing. It was also noticed that at 7 and 10 N of vertical load, there was absence of a peak state in the tangential force-displacement plot, whereas a peak state was observed at smaller loads particularly for the first shearing cycle. These observations might be explained by the possible plowing effects at greater vertical loads which resulted in an increase of the inter-particle coefficient of friction when the shearing test was repeated. For the CDV granules, only the first shearing cycle gave a peak state and, in general, the effect of repeating the shearing was small but with an increase of the inter-particle friction from the first to the second cycle. Overall, during the repeating shearing the LBS grains had a dynamic inter-particle coefficient of friction that ranged between about 0.18 and 0.38, but the CDV granules exhibited much greater friction with values that corresponded to the steady state sliding that ranged between 0.54 and 0.66 . The observed trends in the study might be due to mechanisms that take place...

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Section: Introductionmentioning

confidence: 99%

Exploring the Micromechanical Sliding Behavior of Typical Quartz Grains and Completely Decomposed Volcanic Granules Subjected to Repeating Shearing

Sandeep

Senetakis

2017

Energies

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“…111-120], [37], [38]: short-, medium-and long-radius wells (see the comparison of horizontal well radii depicted in Fig. 2.6, where feasible horizontal stretches are also presented).…”

Section: Directional Wellsmentioning

confidence: 99%

Pseudo-Analytical Modeling for Electromagnetic Well-Logging Tools in Complex Geophysical Formations

Rosa¹

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“…Industrial down-hole motors can be classified into two categories: the positive displacement motor (PDM), and the turbo-drill. Of the two, the PDM is the most common and the most widely used down-hole motor [2]. Due to the popularization and 2 of 23 application of polycrystalline diamond compact (PDC) bits, drilling combining the PDM tool and PDC bit was employed to improve drill efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Rotary drilling, a kind of fully rotary drilling method, is mainly utilized to improve drill efficiency by reducing excessive drag of the drill-string, improving borehole cleaning, improving the control of the weight-on-bit (WOB), and increasing the rate of penetration (ROP); thus, it can be used for drilling in the vertical section, hold-on section, and horizontal section. Currently, drilling that combines the PDM tool and PDC bit is still the main method used to drill a directional well [1,2]. In addition, fully rotary drilling can also be employed in speedup activities of deep wells.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Dynamic Behavior and Steering Ability of a Bottom Hole Assembly with a Bent-Housing Positive Displacement Motor Under Rotary Drilling Conditions

Chen

et al. 2018

Energies

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Fully rotary drilling is one of many useful technologies used for the exploitation of petroleum and geothermal resources, but fully rotating drill-strings are extremely complicated. Therefore, according to the Hamilton principle, a non-linear coupled bottom hole assembly (BHA)-bit-formation-wellbore model is proposed for BHAs with bent-housing positive displacement motor using the finite element method to investigate the dynamic behavior and steering ability under fully rotary drilling. The impact force, acceleration, axial loading, torque, and dynamic stress were simulated, and factors influencing the dynamic steering forces were investigated. The results indicate that the impact force, acceleration, axial loading, torque, and dynamic stress under fully rotary drilling are much higher than under conventional drilling. The numerical simulation and field test in well B confirmed that the rotation of the drill-string is conducive to the hold-on of the deviation angle. With the increase in the weight-on-bit, bend angle, and stabilizer height, the deflecting force on a drill bit increases. Conversely, with the increase in stabilizer diameter, the deflecting force on the drill bit decreases; the lower the deflecting force, the better the effectiveness of hold-on. With increasing deviation angle, the deflecting force on the drill bit first decreases and then increases. The present model can provide a theoretical basis for wellbore trajectory control and optimization design of BHA.

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Overview on vertical and directional drilling technologies for the exploration and exploitation of deep petroleum resources

Cited by 139 publications

References 26 publications

Exploring the Micromechanical Sliding Behavior of Typical Quartz Grains and Completely Decomposed Volcanic Granules Subjected to Repeating Shearing

Exploring the Micromechanical Sliding Behavior of Typical Quartz Grains and Completely Decomposed Volcanic Granules Subjected to Repeating Shearing

Pseudo-Analytical Modeling for Electromagnetic Well-Logging Tools in Complex Geophysical Formations

Numerical Modeling of Dynamic Behavior and Steering Ability of a Bottom Hole Assembly with a Bent-Housing Positive Displacement Motor Under Rotary Drilling Conditions

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