We are at the cusp of Industrial Revolution 4.0, with the cyber-physical system establishing a synergy between computation and physical components. In lockstep with the technologies, as we move toward Well Construction 4.0 coupled with 360° well-engineering optimization for the ultimate delivery of partial to full automation, an important but complex component to be considered is tubulars in the well.
Tubulars are associated with the drilling system, which is complex and dynamic, with a ratio of length to diameter greater than 100,000. For comparison, for a human hair to have the same length-to-diameter ratio, it would have to be 60 ft long. So, reliability is important in such a highly oscillatory, uncertain, high-dimensionality framework. Tubular modeling should bridge deterministic models and data-informed models. This calls for data-informed, engineering-guided, reinforced reliability- or risk-supported models to describe the non-Gaussian drilling system more realistically.
Risk-based design is very important, especially for these complex systems, because a deterministic approach may not provide a strong underpinning to the reliability estimation of the downhole tools. We have to reduce the probability of failure. One of the areas that needs to be considered is a risk-based design for tubulars that formally identifies the elements and areas of risks by using probability of failure to capture uncertainties rather than incorporating safety factors in the deterministic calculations. Risk should be considered during the design phase, which will allow more freedom to make adjustments, and during the drilling phase. Doing so will also help improve the 360° well-engineering optimization and the additional computational components needed for the future cyber-physical system.
I have selected papers that are structured toward this approach with example problems and solutions.
This Month's Technical Papers
Recommended Additional Reading
SPE 188321 Intelligent Drilling System: Expanding the Envelope of Wired Drillpipe by O. Sehsah, Saudi Aramco, et al.
Robello Samuel, SPE, Technology Fellow, Halliburton
18 May 2018
Hybrid Ultradeepwater-Riser Configuration Saves Costs, Pushes Depths
The single independent riser (SIR) is a hybrid riser configuration optimized for ultradeepwater field development. The SIR is composed of a flexible jumper and a rigid part vertically tensioned by means of distributed or continuous buoyancy.
Study Correlates Hydrate Blockage Risk and Gas/Liquid Flow Pattern in Horizontal Pipelines
This paper analyzes the risk of hydrate formation and blockage, aiming at various gas/liquid flow patterns and considering the phase distribution and interface distribution characteristics of different flow patterns.
Real-Time Data From Wired Drillpipe Leads to Improvement in Drilling Performance
This paper shows how high-frequency, real-time drilling data from wired drillpipe has helped optimization of drilling performance and achievement of additional improvements in the New Mexico Delaware Basin.
No editorial available
Don't miss out on the latest technology delivered to your email weekly. Sign up for the JPT newsletter. If you are not logged in, you will receive a confirmation email that you will need to click on to confirm you want to receive the newsletter.
12 May 2020