Application of Small Vibration Logging Tool Yields Improved Dynamic Drilling Performance

Abstract

TX 75083-3836 U.S.A., fax 1.972.952.9435. AbstractThe oil industry is increasingly interested in drilling dynamics as a primary cause of drilling inefficiency. It has become ever more important to be able to both accurately predict and detect downhole vibration/instability throughout the entire drill string. The drill bit is often assigned as the cause, and frequently bears the scars of dynamic drilling problems. Historically bit manufacturers have used a combination of dull grades and surface data to speculate on cause and effect of downhole events with insufficient attention to what may be occurring in between.A small vibration logging tool has been employed in hundreds of applications worldwide. This paper discusses the implementation of this device and its flexibility for placement of multiple tools in various locations, such as specific built subs and/or existing tools, within the drillstring. The versatility of this tool design offers the possibility to be run with any type of bit, fixed cutter or roller cone, regardless of manufacturer thus making it transparent to drilling operations throughout the entire drilling assembly.Specific field cases will be presented including; validation of pre-run dynamics modeling software, rotary steerable tools, concentric and eccentric hole opening tools, and response of different BHA configurations. This type of data is important to further the understanding of drill bit, drillstring component, and overall drillstring dynamic performance.

Vibration of drilling motors in unconventional oil and gas exploration with a miniature recorder

“…Downhole drilling dynamics or vibration have, therefore, become a subject of intensive research [8–10]. The study has focused on the downhole measurement of drilling vibration, its consequences, and tool and operation optimisation processes for mitigation [11, 12]. Generally, drilling vibration is measured with sensors installed in measurement‐while‐drilling (MWD) tools, logging‐while‐drilling (LWD) tools, rotary steerable systems, or specific BHA drilling dynamics measurement tools [4, 13].…”