RiMo is a platform you can use as a real-time digital twin or an engineering/ operational workflow. The digital twin combines real-time surface data with details of bottom hole assemblies to predict drilling dynamics. It is built with a workflow that automatically recognizes rig states and stops the predictive model after connection. Visit us www.mindmeshtech.com

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Drilling Digital Twin Predicts
Drilling Dysfunctions in Real Time
Raju Gandikota
Chief of Innovations

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Drilling Performance
Footage / Tool Life
ROP
Vibration
Control
Directional
Effectiveness
• Drilling programs continue to be pushedinto harder and more abrasive formations withsharper focus oneconomics.
• Understanding whatis workingright, and howcan theybe improved are key to drilling performance.
• Whatis not workingright, andhowcan they be eliminated or minimized are also key to drilling performance.

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• Computer based wellplanninganddrilling dynamics modeling is a standard practice for drillingperformance.
• Standard BHA modeling software thoughfast havelimitations to include realistic downholebehavior.
State of Digital Engineering Models
CriticalSpeedMapof the BHA BHA deflection,BendingMoments & ContactForce

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Static vs. Dynamic
• With Time Domain Analysis,complex
behavior of BHA is clearly visible.
• Large contact force at mud motor and
MWD may cause failure
• Thisis not predicted bystatic
models
• Time Domain is like getting live sensor
data or video feed of yourBHA.
• We drill over time!
• We observe performance and
dysfunctions overtime!
• Why use static models to
make dynamic decisions??
Traditional
(snapshot)
Time domain
(video)

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• We drill over time!
• We observe performance anddysfunctionsover time!
Lateral Vibration Axial Vibration
Torsional Vibration RPM
DynamicDrilling Models

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• Model scalableto run from bit to top drive.
• Multi-threaded with parallelcomputing capabilitiesto run
multi-analysiswith same data feed
• Physics model to handle most BHA’s and special tools like
shock sub, agitators etc.
• Integrate with real-timesystems
• WITSMLfeed and run analysis continuously
• Extensibleto handle OPC/UA
Features of a Time Domain Model

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Time Domain Analysis – VirtualDrilling
• Near Real Time drilling dysfunction prediction for optimization
• Virtual Drill-off Test andsafe operating window

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RiMo Time Domain Analysis – Validation
• Drilling with motor assembly
• Downhole drilling dynamics captured with 50Hz memory sub

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RiMo Time Domain Analysis – Validation
• Bit RPM evaluation shows stick-slip
• RiMo captures the general stick-slip behavior with no additional models
Stick-slip

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RiMo – Drilling Digital Twin
• Real TimeModelswithReal TimeData – DrillingDigitalTwin
• TheDigitalTwinuses real-timesurface data and drillstringdata to predict
downhole drillingdynamics
• Thedrillstring,BHA, and drillbit mechanics are utilizedfrom planning
• Theworkflowis built to automatically recognizedrillingrigstates(rotary or
slidedrilling)and connection makeupto start and stop the predictivemodel
• Thetwin producesquantifiabledrillingeventslikeshock and vibration,
downhole MSE,penetrationrate,etc.,in near real-time
• Therealtimework flowcan also be used for post jobanalysis by streaming
storedEDR data using theplayback function in RiMo

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Real TimeDrilling Dynamics
• Predictdownhole response in new real time
• Virtual drill-offtest & ImprovedrillingKPI’s

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Predict Performance Limiters
• Lateral shocks were high at the bit & RSS
• Lower drilling performance

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Improve Drilling Performance
• Virtual step test with the goal of increasing ROP and reduced lateral vibration
• Step 1, evaluate the shock & vibrations
• Step 2, WOB increased by 10%, RPM reduced by 10%
• Step 3, WOB increased by another 10% & RPM further reduced by 10%
Lateral Shock
Axial Shock
ROP
RPM WOB
TOB
BIT MSE
BIT DEPTH

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Improve Drilling Performance- Virtual Drill-off Test
Magnitude Bit RSS MWD
>5G's 101 59 5
> 10G's 9 1 0
Shock count
Observation Time Bit RSS MWD
Initial 40 27 1
Optmization #1 37 10 1
Optmization #2 24 22 3
• Table #1 simulation shock counts > 5G’s & 10G’s are shown in table for entire simulation time
• Table #2 shows shock count > 5G’s before and after optimization. The WOB & RPM changes do reduce the shock count
and increase the ROP
• Optimization runs do not affect axial vibrations
Table #1 Table #2

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RiMo - Well Engineering Platform
Planning – Real Time– Post JobAnalytics AdvancedPhysics Based Models
Silos of Data
Down Hole
Vendor
Topside
Rig
Materials
DrillString
Design
DrillString
Dynamics
Digitally
Enabling Your
Enterprise
Static Analysis
Directional Tendencies
Critical Speed Analysis
Time Domain Analysis
Soft String & T&D
Stiff String & T&D
Transient Hydraulics
Silos of Data
Wellbore Stability
Steady State Hydraulics

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Building a new digital future
www.mindmeshtech.com
Contact: Raju Gandikota
r.gandikota@mindmeshtech.com