Casing connection มาดูกันว่าเราต่อท่อกรุเข้ากันได้อย่างไร

Today, we are going to learn a bit on how 2 casing joints are screwed in together and sealed.

Let’s us spend a bit on credit to the company that gives away this promotion model.

It is from Vallourec or we generally call it by wider known name as VAM connection.

Again, I won’t go to details of specific features of this specific product. I will use it as a demonstration piece to show generic principles on how 2 casing joints are screwed in together and sealed.

Firstly, let me introduce 2 basic terminologies.

The first piece is a casing joint, which is this part. The model shows one end of it. It is a male end.

The other piece is a coupling. It is made of the same material as the joint, but bigger in size, shorter in length and has 2 female ends.

When we connect these 2 pieces together, they are crewed in like this ……….

Note that, screwing in requires specific number of turns and torque characteristic which depend on the design. They are many designs in the market with various pro and con. I won’t go in to details here.

Let’s look closely …..

You can see a specific design of tread or landing seal contact. The secrets and patents are around all these designs.

At the end of the day, from engineering stand point, we want a connection design that provides strength as if the connected joints are one piece mechanically. Those mechanical properties are torsional strength, yield strength, burst rating and collapse rating.

From operational stand point, we want a connection that is easily to connect, meaning requires less turn and fool prove. No one can screw in wrongly or cross thread easily.

That is all for now. If you like to see more educational clips like this one, please click follow and subscribe. Good bye for now.