5 Things to Know Before Buying Oil Drill Pipe
Important Things to Know About Drill Pipe
Before buying oil drill pipes, it's crucial to ensure you select the right type and quality level for your project needs. Factors such as the manufacturer, the origin of the tubes, and the types of inspections conducted are all essential aspects to consider.
Here are some key points to keep in mind.
The most important thing when selecting a drill pipe for your project is to ask questions. What kind of questions? Here are a few to remember: Who is the manufacturer of the drill pipe, and what is the origin of the tubes and tool joints? If selecting new drill pipe, ask for the data packet or quality documentation package and examine the pipe. Request a plant tour to see the pipe and manufacturing process. If you are choosing or comparing used drill pipe, be sure to see the inspection reports and seek clarification to understand the information thoroughly. Study the outer diameter (O.D.) of the pipe in comparison to the O.D. of new pipe and the minimum O.D. allowable for a connection to pass inspection.
Don’t Overlook This
Pipe Dope Application Procedures
Pipe dope application procedures may be the most overlooked aspect. New threads on new pipe, or freshly recut connections, need special attention to "break-in" during their initial use. We often say, "Only put dope on the threads you want to keep." Proper cleaning of threads before use is also crucial. After removing the thread protectors, threads need to be cleaned and checked before use. Mineral spirits or a high-pressure washer are often used.
Drill pipe stored for a long time should be periodically rotated to prevent "rack rot." We have seen pipes develop rust where the steel contacts wood and moisture, causing pitting that could lead to failure.
Also Important
Make Up Torque and Initial Break-In of New Connections
The speed of rotation during break-in of new threads should be slow and steady. It's best to make up the connection to 100% of the recommended torque. Manufacturers typically complete a three-cycle make and break at the factory at 100% of the recommended torque.
Hard Banding
Hard banding can extend the life of drill pipe when used on rock crossings. While some manufacturers install different types of hard banding, they can significantly benefit rock formations by reducing tool joint O.D. wear. HDD contractors prefer standard API-style connections such as 4-1/2-in. IF, 5-1/2-in. Full Hole, or 6-5/8-in. Full Hole, available in standard forms or with a double shoulder feature.
Inspection and Stress Cracks
Regular inspection is critical to detect cracks early. Stress in steel is cumulative and referred to as fatigue. Ensuring that the pipe has not developed leaks or breaks is preventive maintenance that can save substantial operational downtime.
Remember: Ask questions. Drill pipe suppliers and manufacturers should provide informative resources, including manufacturers, API, and T.H. Hill.
Jay Miller is president of J.T. Miller LLC.
How to Buy Pipe
New vs. Used Pipe
Used pipe is subject to internal and external decay and can be hard to keep painted. New pipe, especially when galvanized, typically lasts longer and is free from the risks associated with used pipe, such as saltwater and acid corrosion from oilfield use.
Avoiding Corrosion
Saltwater and acids used in oil production can seriously damage the internal structure of the pipe. Ensure knowing the history of the pipe before purchase.
Used Pipe Issues
Used pipe can also suffer from rod wear due to the spiral nature of drilling holes, resulting in internal deterioration over time.
New Pipe Advantages
New pipe, if selected properly, can offer longevity and reliability. Know the grades and specifications from recognized standards to make an informed decision.
Grades of Pipe
Understand the different grades, such as White band (maximum 12% body wall loss), Yellow band (15%), Blue band (16%-30%), and Red band (over 30%). These grades help in determining the suitability for various uses.
Wall Thickness and Strength Rating
The wall thickness of the pipe defines its price and suitability for various applications. Choose the appropriate strength rating (STR) for your specific needs, whether it's for gates, rails, or posts.
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