During drilling operations, the bit-rock and drillstring-wellbore contacts with stick-slip phenomena, fluid structure interaction, and mass unbalances distributed along the drillstring yield nonlinear dynamics coupling axial, torsional, and lateral vibrations. Excessive and uncontrolled vibrations may induce drilling equipment damage due to fatigue, cracking, and ruptures. Understanding and...

With the high rates of penetration achieved by today’s drilling contractors, directional drillers have little time to make optimal steering decisions in a continually changing environment. Even when proper directional drilling decisions have been made, flawless execution of each decision can be difficult to perform. Performance related to drilling speed, drilling accuracy, and...

Positional uncertainty in wellbores is caused by numerous error sources and propagates in magnitude along the measured depth of the wellbore. This can be problematic when planning or drilling closely spaced long reach wells while still satisfying collision avoidance policies. The ellipses of uncertainty associated with surveys acquired by standard Measurement While Drilling (MWD) tools are...

Since Helmerich & Payne’s adoption of Actively C.A.R.E.™, our serious injury or fatality (SIF)-based safety program, dropped objects have stayed at the top of SIF exposures that our workers face daily. With so many different items located throughout the drilling rig with the potential to become a dropped object, we must stay constantly vigilant in our assessments to...

Drilling surveys are a critical component in the exploration and production of oil and gas resources. It encompasses the techniques and processes used to measure the trajectory of a wellbore, the narrow shaft drilled into the earth. Accurate wellbore surveys are necessary for ensuring that the drilling process adheres to the planned path, which maximizes hydrocarbon recovery and minimizes...

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The use of basic torque and drag modeling as well as the application of industry-standard buckling formulae can limit the options for well design. Advanced buckling modeling, and a fundamental understanding of the effects of buckling, can be used to generate lighter well architectures, resulting in significant savings in cost and CO2e emissions, without compromising well integrity and zonal...

This paper presents the simulation of a dynamic downhole drilling phenomenon which resulted in significant non-productive time and unnecessary drilling cost. The consistency of simulation fidelity from one stand to another provides insights as to the application of simulation for the purposes of optimizing drilling technique and recognizing drilling dysfunction. The significance of physical...

Stick-slip is still present in most of the wells drilled today, especially in unconventional wells. Friction is an inevitable and important force along the long lateral section, but it contributes to many types of dysfunctions that lead to drilling inefficiency. Stick-slip is caused mainly by rotational friction induced along the drillstring, from the drill bit cutting the rock formation to...

The drilling and completion of oil and gas wells is a collaborative business, involving employees from many contractors working together. Well construction generates many documents that are shared cross-functionally between these different groups. A regulator may receive an as-drilled plat from a well planner, using surveys from an MWD operator, based on a pipe tally from a rig contractor. In...

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Effectively automating drilling a stand while minimizing human variability requires a scalable control system, providing adaptability, seamless implementation, and improved operational outcomes. The system requires high- and low-level process control components to effectively control rig machinery within the bounds of the machine limit controls. By using automation sequences while engaging and...

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