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From left Ulf Jakob F. Aarsnes (IRIS) and Prof. Florent di Meglio (Mines ParisTech).


A travelogue from a DrillWell postdoc

17.03.2017

Ulf Jakob F. Aarsnes, a postdoc at DrillWell and IRIS, is shearing his experiences from his collaborations with other universities, together with some of the research results extracted from these visits.

University of Calgary
I visited Prof. Roman Short at the University of Calgary for one week in September. Roman has significant experience in both working with sophisticated mathematical descriptions of the drill string and the actual field practices. This has enabled us to corroborate mathematical analysis with field data to derive application oriented results within the technically challenging problem of stick slip.
 
Stick slip is usually considered a phenomenon of bit-rock interaction, but is also often observed with the bit off bottom.  In our work, we present a distributed model of a drill string with an along-string Coulomb friction to investigate the effect of borehole inclination and borehole friction on the incidence of stick-slip. To isolate the effect of this distributed friction, we consider datasets with where the drill string rotation is restarted off bottom after a connection. High frequency field data from two deviated wells with surface and downhole sensors were used.
 
This collaboration has so far resulted in one Journal paper and two conference paper submissions on this topic.

ulfjakob
Banff national park outside Calgary. From left. Prof. Giovanniantonio Natale (UofC), Madeleine Natale (UofC), Prof. Roman Shor (UofC) and Ulf Jakob F. Aarsnes (IRIS).

Mines ParisTech
I spent October through December 2016 visiting Prof. Florent di Meglio at Mines ParisTech. Florent di Meglio is an expert on analysis, estimation and control of distributed dynamic systems. We want to leverage this expertise to make novel contributions on topics within drilling where the distributed nature of the system is essential to the qualitative behavior of the system, and consequently cannot be ignored. Such distributed behavior is exhibited in the gas-liquid flow and cuttings transport in a well, and in drill string vibrations.
 
Ongoing research collaborations include:
  • Modeling and estimation of transient cuttings transport
    • Apply distributed transient cuttings transport model to closed loop estimation.
    • Leverage expertise in estimation of distributed systems at to make contribution on this topic.
  • Drill string vibrations
    • Torsional and axial vibrations likely to require description of the distributed interaction between the drill string and borehole as well as the bit-rock interaction.
    • Analysis can yield insight on mechanism for instability and prediction of occurrence.
       
  • Automated pressure control of two-phase flow in pipes
    • Distributed descriptions incorporating delay effects are required to analyze robustness and performance of control structures for pressure control two phase flow. 
Cementing experiments
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DRILLWELL AT SPE WORKSHOP ON WELL INTEGRITY IN CANADA
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Successful playback of data from Ivar Aasen
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New safe artificial rock for plug and abandonment
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DRILLING DATA HUB DEMONSTRATION
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DRILLWELL TECHNICAL SEMINAR 2017
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Recorded webinar
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Rice 2017 Data Science Conference
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DrillWell technical seminar - day two
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DrillWell technical seminar - day one
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The annual DrillWell conference Sept 26-27
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GREAT RESULTS AT DRILLBOTICS 2017
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DrillWell at OMAE 2017
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OFFSHORE TECHNOLOGY CONFERENCE 2017
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Experimental P&A research for the North Sea
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SPE/IADC Drilling Conference 2017
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The great drilling automation debate
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Experimental P&A research for the North Sea
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Cement evaluation test facility
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University of Stavanger has made it to the final round in the Drillbotics competition
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Register for OTC 2017 NorTex Data Science Cluster Workshop
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Visit to UBC in Vancouver
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New experimental insights on cement displacement
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A travelogue from a DrillWell postdoc
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3D-prints flowrate sensor prototype
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Meet PhD student Riisøen
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DrillWell Technical seminar – day 2
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DrillWell Technical seminar - day 1
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​Project development at NorTex
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PhD on Optimization of Well Placement
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Risk of leakage as measurement for quality in P&A solutions
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New PhD in DrillWell
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DrillWell seminar September 27&28
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Get ready for ONS 2016!
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UT Austin researchers at IRIS
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More precise guidelines for hole cleaning
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Site Visit by the Research Council
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Focus on Data for Drilling Automation
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DrillWell PhD thesis defended
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DrillWell results presented and discussed at mini seminar
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DrillWell presented at OTC
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20 million to drilling project
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NorTex Data Science Cluster Workshop: Plug & Abandonment
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Two NorTex workshops at OTC 2016
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DrillWell at SPE One-day in Bergen
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DrillWell Annual Report 2015
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Visit from DTU in Copenhagen
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DrillWell represented at SPE Symposium in Banff, Canada
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Green light for the next three years
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Two new Petromaks2 projects supported by the DrillWell consortium
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Transient cuttings transport model draws attention
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First DrillWell PhD dissertation
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Artikkel i Teknisk Ukeblad 12.11.2015:
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INTPART-funding to “NorTex Data Science Cluster”
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Vacant position: Research Fellow in Drilling Engineering
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The annual DrillWell technical seminar - Day 2
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The annual DrillWell technical seminar – Day 1
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Sharing knowledge is the new power
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Well log interpretation: Will the machines take over our jobs?
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DrillWell at OMAE 2015 conference in Canada
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The 1st DrillWell newsletter
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INTSOK UK-Norway network meeting
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Collaboration with the new SFI in Agder
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ROP Management results presented to Statoil
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DrillWell at SPE Bergen One Day Seminar
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NPF presentation in Stavanger
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Lundin joins DrillWell
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DrillWell paper in Journal of Petroleum Technology
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SPE/IADC Drilling Conference
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The 2014 IADC Well Control Conference Europe
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Paper in JPT Journal
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DrillWell annual seminar
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DrillWell present at NPF's Drilling and Well Conference
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DrillWell at ONS2014
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Tubing left in hole test
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SPE Intelligent Energy Conference
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Tubing left in hole test
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