Redefining Well Integrity Software Solutions

Pipe  Tortuosity, Deformation, Drift and Contact Analysis (PTDCA)

What Is It?

​The software provides a quick, concise and accurate means of determining the effective drift OD (Free bore ID) which is the actual maximum OD of a tool/drift that can pass through a given cross-section of the wellbore for a specific drift length, and vice versa without bending stresses; using an inverse simulator. Pipes do not necessarily have to be "deformed" to pose  access problems. Our algorithm puts into consideration both the local pipe deformation and micro-doglegs/tortuosity from well trajectory.

​Our signature contact analysis module determines the depths at which a sucker rod would touch/rub against the walls of the tubing (or surrounding pipe) causing wear and tear as it strokes up and down. This helps in proactively placing rod guides at the right positions to prolong the life of the completion.

How Does It Work?

EUREKA takes in high resolution directional Survey data and performs numerical analysis on the input data to determine the effective drift OD through any cross-section of the wellbore for a given drift length greater than the input data step increment . Also, an inverse simulator is available which uses an iterative moving window  to determine the maximum drift length for a given drift OD.  One other very useful and unique feature available (first of its kind) with the package is the contact analysis feature which determines the  depths at which sucker rods (and indeed any continuous long pipe/rod) will make contact with the surrounding pipe or tubing and informs proactive decision on where to pre-install rod guides, hence prolonging the life of the completion. "Spikes" from a value of zero to one on the contact analysis results plots are faithful representations of the contact depths.  

3D images of both the local and global well bore trajectory plots are available. The local trajectory plot highlights micro-doglegs that otherwise will not be visible on a standard global plot

In the absence of a continuous gyro tool /data, strictly Multi-Finger Caliper data can be used to derive the relative wellbore trajectory and subsequently perform the drift and contact analysis, thus providing both directional and ID measurements  and resulting in even more robust results.


The EUREKA software now includes a new Pipe Tortuosity, Deformation, Drift and Contact Analysis (PTDCA) Package. This module takes in high resolution directional survey data either by directly using continuous gyro data or deriving directional data (relative trajectory) from Multi-Finger Caliper data and returns the effective drift OD (Free Bore ID) through each wellbore cross-section for any given drift length larger than the directional data step increment.  An inverse simulator is available that yields the maximum drift length for any given tool OD less than the "gross" bore ID. This finds application in optimum ESP placement, quantifying tool bend (angular displacement), wellbore access prediction and string/BHA optimization. We are proud to say that we are the first to come up with a Contact Analysis feature. This provides the depths at which a sucker rod would touch/rub against the walls of the surrounding tubing hence providing key information that helps prolong completion life via proactive well completion planning and rod guide placement

Please contact Engineered Systems Development Inc. at your convenience for an initial consultation. We’ll work with you one on one to determine a roadmap to success. We look forward to working with you soon.

Call Today: +1403-651-7967

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Engineered Systems Development Inc.

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Well Integrity Software Development

Drift and Contact Analysis

What Does This Mean?

With high resolution survey data (which is also derivable using Multi-Finger Caliper data acquired under certain best practices / guidelines) or a combination of gyro with caliper data, operators can now derive a lot more useful  information other than just strictly direction. Effective drift ODs can be determined with utmost precision and max drift lengths can be determined proactively for toolstring optimisation prior to engaging in especially critical operations. From micro to Macro doglegs, the effect of tortuosity on well bore access limitation can be better quantified, and well completions utilising sucker rods can last longer.