The Five “W’s” of Visual Inspection of Casing and Tubing Connections

What - The paradox of any connection is that while they can perform under extreme conditions, they can be rendered ineffective by damage that can affect their ability to perform to their design requirements. A visual thread inspection performed by an experienced and knowledgeable thread inspector may identify potential damage that could render the thread and/or seal to not perform and become unreliable. Specific damage that an inspector may identify is; dings, pulled or torn threads, corrosion, pitting, improper end-finish, and machining imperfections. A significant amount of this type of damage can be identified, isolated and/or field repaired. Visual Thread Inspection of casing and tubing is cost effective and valuable for the end-user, as it could prohibit unproductive time on the rig.

Why - Casing and tubing connections may be one of the most critical and costly components of any well if their performance is jeopardized. One connection failure can result in a expensive fix or a total loss of a well. Thread connections are manufactured to the most stringent tolerances considering all the other elements used in a well. Many elements of the threads are machined with tolerances within the range of +/- 0.010”. The threaded connection is one of the most critical inspected part in any well.

When - A visual inspection of casing and tubing connections should be performed whenever potential damage may have occurred.  The most critical inspection is just prior to shipping pipe to a location for installation in the well bore. This is typically the last time the connections will be inspected. The condition of the pipe, connections, and accessories should also be inspected when material is returned from a location prior to placement back into prime inventory. It is a good practice for end-users and distributors to develop an inventory maintenance program.

Where - A pipe yard environment is the best place to perform a visual inspection. Pipe Yards have the necessary space and equipment to lay out the pipe, and thoroughly clean all the connections. In this environment the thread inspector can perform a critical inspection. Thread protectors can be cleaned, and the proper thread compound applied at this time.

Who - The inspection must be performed by a qualified and trained professional inspector. Secure Connexions, LLC will provide professional inspectors that meet and exceed all the customer’s requirements and expectations.