Analytical modeling of axial oscillation-supported drillstrings in high-angle wells

Omojuwa, Emmanuel; Ahmed, Ramadan

doi:10.1016/j.petrol.2020.107139

Cited by 5 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The concentrated load method was considered to establish the drill string mechanics models based on relevant research. [17][18][19][20] In the directional drilling process, it was assumed that (1) the central axis of the drill string and the borehole axis coincide at the initial stage, and the drill string was an elastic slender rod with small deformation and uniform mass distribution.…”

Section: Mathematical Modelsmentioning

confidence: 99%

Dynamic Characteristics of New Mechanical Rotary Steerable Tool in Directional Drilling

Tian¹,

Tang²,

Xue-hua³

et al. 2022

The International Journal of Acoustics and Vibration

View full text Add to dashboard Cite

The characteristics of a drill string system have an essential influence on the performance of directional drilling. The appropriate control method of a drill string is important to drilling efficiency and downhole operation safety. Therefore, based on a new mechanical rotary steerable tool (RST), this paper aims to analyze the Dynamic Characteristics of RST in Directional Drilling. First, considering the thrust force generated by the RST and bottom hole assembly (BHA), the governing vibration equations of a drill string system are established. Furthermore, connected with fields drilling parameters, including the effects of a new RST on a drill bit and wellbore, as the boundary and initial conditions, the dynamic characteristics of a drill string system are compared and studied in directional and straight drilling. The results show that the axial vibration of the drill string increases extremely in directional drilling process, while the weight on bit (WOB) and inclination force change in small range. Moreover, the torque and azimuth force tend to be stable soon, even its initial fluctuations are significantly. Also, the new RST can effectively enhance the steering capacity, increase the drilling efficiency, and improve drill bit force performance. The research results can provide reference for developing directional drilling technologies, including related tool design and optimization.

show abstract

Section: Mathematical Modelsmentioning

confidence: 99%

Dynamic Characteristics of New Mechanical Rotary Steerable Tool in Directional Drilling

Tian¹,

Tang²,

Xue-hua³

et al. 2022

The International Journal of Acoustics and Vibration

View full text Add to dashboard Cite

show abstract

“…These studies mainly focus on the impact of vibration frequency, vibration load, pressure, and flow rate on the drag reduction effect of hydraulic oscillator. In addition, some researchers conducted research on drag reduction model [16] , vibration mathematical model [17][18] , and friction resistance prediction [19] of hydraulic oscillator. However, the above literature lacks research on the geometric parameters of hydraulic oscillator.…”

Section: Introductionmentioning

confidence: 99%

Study on the Influence of Geometric Parameters on Vibration Characteristics of Hydraulic Oscillator Used in Oil Drilling

Tang,

Zhao,

Zhu

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

Hydraulic oscillator is an important drilling equipment extensively used in petroleum extraction and drilling work. It generates vibration along the axis direction to drive the drilling tool to drill and the drilling effect largely depends on the axial impulsive loading and frequency of the hydraulic oscillator. However, few present studies have been conducted on the influence of variations in key geometric parameters on axial impulsive loading and frequency of hydraulic oscillators, and systematic analysis is still lacking. Optimization calculations were carried out on throat inner diameter, throat length, nozzle spacing, and nozzle angle of the hydraulic oscillator. The analysis results show that: The overall impact of throat length and nozzle angle changes on axial load is small, while throat inner diameter has the greatest impact on the axial load. The axial load is 375.78 N when throat inner diameter is 10 mm, which is 8 times larger than that when throat inner diameter is 20 mm. Moreover, the throat inner diameter is smaller, both the axial load and amplitude are greater. Nozzle spacing has a significant influence on the axial load within a narrow spacing range. As nozzle spacing increases, the axial load increases overall while the amplitude shows a decreasing trend. Particularly, when nozzle spacing exceeds a certain value, the axial load does not vary significantly.

show abstract

A review of axial vibration tool development and application for friction-reduction in extended reach wells

Tang

Zhang

et al. 2021

Journal of Petroleum Science and Engineering

View full text Add to dashboard Cite

Analytical modeling of axial oscillation-supported drillstrings in high-angle wells

Cited by 5 publications

References 14 publications

Dynamic Characteristics of New Mechanical Rotary Steerable Tool in Directional Drilling

Dynamic Characteristics of New Mechanical Rotary Steerable Tool in Directional Drilling

Study on the Influence of Geometric Parameters on Vibration Characteristics of Hydraulic Oscillator Used in Oil Drilling

A review of axial vibration tool development and application for friction-reduction in extended reach wells

Contact Info

Product

Resources

About