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Prof. Dr.-Ing. habil. G.-P. Ostermeyer Technische Universität Braunschweig, Germany Institute of Dynamics and Vibrations Drill String Dynamics Group

Institute of Dynamics and Vibrations Drill String … Drill String Dynamics... · Institute of Dynamics and Vibrations Drill String Dynamics Group . ... failure detection or ... Institute

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Page 1: Institute of Dynamics and Vibrations Drill String … Drill String Dynamics... · Institute of Dynamics and Vibrations Drill String Dynamics Group . ... failure detection or ... Institute

Prof. Dr.-Ing. habil. G.-P. Ostermeyer

Technische Universität Braunschweig, Germany

Institute of Dynamics and Vibrations

Drill String Dynamics Group

Page 2: Institute of Dynamics and Vibrations Drill String … Drill String Dynamics... · Institute of Dynamics and Vibrations Drill String Dynamics Group . ... failure detection or ... Institute

Page 2

Our Approach to Solving Your Problems

We consider and investigate the complex matter of drill string dynamics using various time and size

scales, as well as problem-specific model complexity, and a flexible, modular model setup.

Our models range from complex to reduced models and down to minimal models (with real-time

capability), all equipped to represent the complete drill string, as well as individual parts of interest (e.g.,

bit models).

Using standard methods

as well as our own

innovative simulation

techniques, we are able to

simulate all dynamic

effects, e.g., stick-slip,

whirl, bit-bounce and

durability-relevant load

spectra

The OSTrator supports

experiments that generate

dynamic effects, making it

suitable both in practice

(e.g., control techniques),

and as an education tool.

Measurement data

treatment and analysis. Simulation

Modeling

Analysis

2013 | Prof. Dr.-Ing. habil. G.-P. Ostermeyer | Drill String Dynamics Group |

We are always focused on keeping these three fields closely connected. Experimental data originating from

our test stands, as well as post-processed (downhole) measurements can be used for validation.

Page 3: Institute of Dynamics and Vibrations Drill String … Drill String Dynamics... · Institute of Dynamics and Vibrations Drill String Dynamics Group . ... failure detection or ... Institute

Page 3

Minimal Models • Stick-Slip

• Whirl

Particle Simulations • cutting transport or

• flow and friction simulations

are feasible

Full Models

String-Mud-Interaction • lateral damping

• virtual string mass

Frictional Contacts • torque and drag

• polymer friction

Algebraic Models • Stick-Slip

• Whirl

Modeling – Complexity and Techniques

Su

bsyste

m

Fu

ll s

yste

m

Abstract Models Physical/detailed Models

Ab

str

ac

tio

n /

Ap

pro

xim

ati

on

2013 | Prof. Dr.-Ing. habil. G.-P. Ostermeyer | Drill String Dynamics Group |

Page 4: Institute of Dynamics and Vibrations Drill String … Drill String Dynamics... · Institute of Dynamics and Vibrations Drill String Dynamics Group . ... failure detection or ... Institute

Page 4

Do you have questions concerning the dynamic phenomena and mechanical loads of your drill string? We

offer problem-adapted models and efficient simulation strategies!

Input

• Drilling Process

• Wellbore Geometry

• Drill String Setup

• BHA

• Mud

• Formation

• Temperature

• Pressure

• Wear (especially bit)

• Tripping Time

Output

Prediction and Mitigation

of Dynamic Phenomena

• Whirl

• Stick-Slip

• Bit-Bounce

Stability Thresholds

• Buckling

• Snaking

Load Power Spectra

Loads for Fatigue Analysis

• Average loads

• Peak loads

• Lifetime estimations

Drill String / BHA Design

Recommendations

Pre-Well Analyses

Rate of Penetration (ROP)

Model

Our modeling team offers interdisciplinary modeling expertise.

Our major strength is providing models that are specially tailored to your requirements.

minimized computational effort

maximized relevance of results

Short-Term Dynamics Long-Term Dynamics

adjustable

complexity

Modeling – Input and Output

2013 | Prof. Dr.-Ing. habil. G.-P. Ostermeyer | Drill String Dynamics Group |

Page 5: Institute of Dynamics and Vibrations Drill String … Drill String Dynamics... · Institute of Dynamics and Vibrations Drill String Dynamics Group . ... failure detection or ... Institute

Page 5

• Time / Frequency Domain Simulations

• Multi Body Systems (MBS)

• Finite Element Method (FEM)

• Real-Time Capability (HDL)

• Reduction Techniques

• Complex Drill String Setup

• Complex BHA Setup

• Complex Wellbore Geometry

• Contact Models incl. Formation Data

• Post Processing

Buckling

Simulation Techniques

Simulation – Techniques and Results

Post Processing

2013 | Prof. Dr.-Ing. habil. G.-P. Ostermeyer | Drill String Dynamics Group |

Analyses of Results

Online-Simulation of MBS and Complex FE-Models

Stability Maps

Page 6: Institute of Dynamics and Vibrations Drill String … Drill String Dynamics... · Institute of Dynamics and Vibrations Drill String Dynamics Group . ... failure detection or ... Institute

Page 6

Simulation

Examine all important drill

string effects under various

conditions:

forward and backward whirl,

stick-slip, Eigenmodes,

buckling, snaking, straight /

curved / inclined wellbores,

high or low friction stabilizers

and bits.

Control / Automation

Optimize drilling performance.

Explore mitigation and control

strategies. Cost-effective

feasibility studies.

Training

Learn through experience.

Gain understanding of complex

behavior in an easy way.

Analysis Our competences in

drilling mechanics enable

us to professionally treat,

analyze and interpret field

data e.g., for mechanical

failure detection or

operation optimization.

Monitoring

Develop failure prediction

and monitoring algorithms

for reduction of non-

productive time.

Problem-Specific Development

Do you have a special question,

problem or request? We will

gladly extend our test stand meet

your needs.

Analysis – Experiment

Mini-Rig OSTrator Data Evaluation

2013 | Prof. Dr.-Ing. habil. G.-P. Ostermeyer | Drill String Dynamics Group |

Page 7: Institute of Dynamics and Vibrations Drill String … Drill String Dynamics... · Institute of Dynamics and Vibrations Drill String Dynamics Group . ... failure detection or ... Institute

Page 7

Our Offer to You

Modeling, Simulation and Analysis:

Are you looking for theoretical scientific support, tailored models, innovative simulation techniques,

advanced measurement data analyses, or experimental analyses to maximize drilling performance,

minimize failure rates, and reduce drilling cost?

Our team’s R&D services provide you with insights and solutions to help you accomplish your objectives.

Short-Term Projects:

Do you need short-term support on a well-defined problem, e.g., from an ongoing development

project? We have the methodical expertise and equipment needed to solve your problem by means of

simulation, experiment, and/or measured data analysis.

Research Projects:

Are you interested in a long-term collaboration to tackle a challenging scientific problem? We are

pleased to define an individually-tailored project plan together with you. In this mode of collaboration,

a scientist from our institute works full-time on the defined problem for at least one year. He or she has

full access to the experience and equipment of our team and, optionally, works with your team on-site

for reasonable periods of time.

We would be pleased to prepare an individual quote

based on your request.

2013 | Prof. Dr.-Ing. habil. G.-P. Ostermeyer | Drill String Dynamics Group |

Page 8: Institute of Dynamics and Vibrations Drill String … Drill String Dynamics... · Institute of Dynamics and Vibrations Drill String Dynamics Group . ... failure detection or ... Institute

Your contact:

Prof. Dr.-Ing. habil. G.-P. Ostermeyer

TU Braunschweig

Institute of Dynamics and Vibrations

Schleinitzstraße 20

D-38106 Braunschweig, Germany

Tel. +49 (0) 531 391-7000

Fax +49 (0) 531 391-7017

[email protected]

www.ids.tu-braunschweig.de