# Build Turn Planning Method From Vertical

## Background

In Well Seeker Pro version **2.2.0.0** the planning tools have been updated to make them more robust and user friendly. One such update to these tools is that a critical point with an inclination of zero is automatically updated to have an azimuth of zero, regardless of user input. This can lead to some historical well plan grids not calculating as they previously did e.g. if a **build turn** planning method was used for a critical point immediately after a critical point with an inclination of zero. This document details an example of this issue and the solution.

## Description

Below is a plan created in a **pre** 2.2.0.0 version of Well Seeker Pro and viewed in a **pre** 2.2.0.0 version of Well Seeker Pro. An azimuth value other than zero is able to be entered when the inclination is zero, which is not representative of reality. As a result a build turn method will build on the azimuth present in the row before it:

<figure><img src="/files/8NNWXm6w7J4qfWURnpzr" alt=""><figcaption></figcaption></figure>

Below is the same plan created in a **pre** 2.2.0.0 version of Well Seeker Pro but this time viewed in version 2.2.0.0 of Well Seeker Pro. The azimuth is automatically changed to zero when an inclination of zero is present in the same row. This results in the subsequent build turn row yielding a different result than in previous versions:

<figure><img src="/files/HcKSy1E8VtfxF30DU6km" alt=""><figcaption></figcaption></figure>

<mark style="color:red;">It is very important to note that this will not affect the planned wellbore listing results unless the planning grid is open and</mark> <mark style="color:red;"></mark><mark style="color:red;">**Save**</mark> <mark style="color:red;"></mark><mark style="color:red;">is selected, or when the Plan Properties are applied when the planning grid is open.</mark>

## Solution

Pre-existing plans that experience the above issue can be rebuilt using the dogleg tool face method, to achieve the original plan, if required:

<figure><img src="/files/xjACqNEUJe5gUuzAFmPT" alt=""><figcaption></figcaption></figure>


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