Tool

Bowen Casing Spear System Calculator

Our Bowen Casing Spear System Calculator helps determine the overall load rating and mode of failure for the spear, mandrel, grapple, and casing in each application.

Our Bowen™ Casing Spear System Calculator app helps you determine the spear assembly and grapple combination that will provide the greatest strength to your application. It also allows you to identify the weakest component of the system so you can plan accordingly.

For a more detailed, step-by-step guide that include visuals, download our Bowen Casing Spear Calculator Instructions document.

Registering a MyNOV Account

  1. Go to portal.mynov.com and create an account by clicking on Account Registration.
  2. Fill out the information requested for MYNOV Account Registration and then click Submit Registration. (Use your company email. Gmail/etc. will not be accepted.)
  3. Once you receive an email to verify your email address, go back to portal.mynov.com and click Sign In. Select MYNOV and enter the credentials you set up in Step 2.
  4. You are now logged into MYNOV.

Requesting access to Downhole software

  1. Once logged in to MYNOV, click on the Applications button
  2. Navigate to the Bowen Casing Spear App icon and click on Request Access.
  3. Your application will be reviewed. Subject to approval, you will receive an email indicating a successful software access request.
  4. Download the Bowen Casing Spear Calculator app via the Apple app store or Google Play.

Using the App

  1. Open the Bowen Casing Spear Calculator app and click on the Casing OD Nominal tab.
  2. Input your specifications by select the targeted casing size for your application, casing weight, casing grade, and the casing spear and grapple you intend to use.
  3. Review and share your results.

Disclaimer

Calculated values are theoretical yield strengths and are considered accurate to within ±20%. They assume the worst-case scenario based on API tolerance. All strengths assume straight and steady pulling of a fully engaged round fish. Any irregularities in the fish ID/OD, damage to the grapple or mandrel, or jarring can reduce the strength substantially. Ratings are based only on grapple range. These values are presented without any safety factor. Please contact NOV Engineering if there are any questions.

Legal

IMPORTANT – READ CAREFULLY THE TERMS AND CONDITIONS SET FORTH BELOW. YOUR USE OF THIS APPLICATION CONSTITUTES AGREEMENT TO THE TERMS AND CONDITIONS SET FORTH BELOW. IF YOU DO NOT AGREE TO THESE TERMS, PLEASE DO NOT USE THIS APPLICATION.

USER ASSUMES THE ENTIRE RISK OF USE OF THIS APPLICATION. This is a legal agreement between you and National Oilwell Varco (“NOV”) for use of the Bowen Casing Spear Calculator Application. NOV makes no warranties with regard to the software, the information contained in it, or the performance of the software. The information and data content are provided “AS IS” and without warranty or representation of suitability of any kind. NOV assumes no responsibility for the accuracy, completeness, or timeliness of the information/data and for any errors or omissions therein or any misuse, misinterpretation, or results or effects obtained therefrom. NOV has used its good-faith efforts to provide accurate information, but it makes no warranties in that regard, will accept no responsibility for any consequences of relying on that information, and will not be held liable for any technical, editorial, or other errors or omissions that may be contained herein. NOV hereby disclaims all warranties and conditions with regard to the contents herein, including all warranties and conditions of merchantability, whether express, implied, or statutory, fitness for a particular purpose, title, and non-infringement. In no event will NOV be liable to you for indirect, special, incidental, or consequential damages (whether in contract, tort, strict liability, negligence, or other theories) or for lost profits or increased expenses arising out of this agreement or the use of the software and associated information.

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