What is NDT?
NDT stands for Non-Destructive Testing. It encompasses many different methods to inspect structural welds and steel without destroying the structural integrity of the portion being tested. Indications of potential problems that are not visible to the naked eye can be detected without compromising the structural consistency.
Why Should I Have a NDT Inspection on My Rig?
You should perform an inspection on your rig for many reasons, but the most important of these reasons being safety. Structural defects from normal wear and tear as well as stress fractures and abnormal use will be evident through the inspection process. As derricks and masts are lowered and raised, there is an extreme amount of stress distributed throughout the structure not to mention, the stress of the drilling operations which take place on a daily basis. Also, the API (American Petroleum Institute) recommends the derricks and masts be inspected at certain intervals. An API RP4G is every ten years and an API RP3G is every five years. It is recommended that an engineer from the company which built the derrick be present for these inspections, so that he can visually inspect and determine the most critical areas for testing.
What is the Benefit?
You may be able to prevent a catastrophic incident involving life and property by detecting potential structural defects before it is too late. Inspection is part of a preventative maintenance program that may save lives and money through inspection and repair.
What is a Dropped Object Survey?
The DROPS program was established to help prevent overhead equipment from injuring, killing, or damaging life and property. This program is an inspection process where equipment temporarily mounted in overhead locations i.e. snatch blocks, lighting fixtures, shackles, etc are inspected for the proper safety systems to prevent the accidental falling of an object from a detrimental height.
What Are The Benefits?
The DROPS program benefits anyone working under or around equipment temporarily mounted to an elevated structure.