Protecting The Threads On Drill Rods And Casing
The threads on the end of a piece of casing that is used in an oil or another well are critical. If the threads are damaged, the collar that connects the pieces of the casing may not screw on, and it can slow down or even stop the drilling process. The same is possible if the threads on the drill rod are damaged. There are ways to protect the threads and ensure that the process continues along if you use them.
Male Thread Protection
The threads on the outside of the casing or drill rod are referred to as the male threads; they are easily damaged because they are on the outside of the pipe or rod, and it doesn't require much of an impact to flatten them or roll the thread over. It is common for the casing and the rods used in the drilling process to be stored on the ground or on a pallet until they are needed. The best way to keep them from getting damaged is by using a cap over the threads. The cap may be made from metal or plastic but it is placed over the threads on the casing or drill rod and will remain in place until the casing or rod is brought to the well for use. The protective cap can be unscrewed and reused later if it is not damaged.
Female Thread Protection
The female threads are the ones on the inside of the collar, used to connect the casing and one end of the drill rod. While just as critical to the operation, they are a little less prone to damage because they are on the inside and protected to some extent by the outside of the rod or casing. Thread protectors for female threads are similar to the male protectors except that they thread into the pipe or rod like a plug. They can also be removed from the rod or casing when ready and are commonly reusable.
Alternative Uses For The Thread Protector
While the thread protector is used to keep the threads undamaged, they can also offer some alternative uses. In some cases, the thread protector will also act as a bail or handle. This makes it easier to haul the casing or rod up in place on the drill rig. While not entirely necessary, they are a great alternative to the generic thread protector and offer a useful alternative to a plastic cap that serves to protect the threads. Protectors like these are made of metal, not plastic, and they can add a little weight to the rod or casing, but not enough to avoid their use on the oil field or other drilling operations.
For more information, talk to companies like Bettis Oilfield Products.