This template can be used as a starter file for a photo album.
Lets start this well control discussions with rig gaskets and flanges. Connections in most well control equipment are made by two mating surfaces commonly known as API Flanges. API (American Petroleum Institute) are the standards to which these flanges are manufactured globally. To make-up two flanges together, a ring gasket is normally placed in-between the mating flanges just to provide a metal-to-metal gas tight sealing or seallability The flanges are then tightened together with bolts and nuts to a recommended torque value. As you can see from the slides there are three main types of ring gaskets: the R; RX & the BX.
This slide is showing the application of the different types of rig gasket. From the table, you can see that the R and RX is good for pressures ranging from 2000 psi to 5000 psi and flange sizes ranging from 2-1/16” to about 11” (with the exception of 3-1/16”). The BX ring gasket is good for pressures starting from 5000 psi and above. The numbers beside the ring gaskets are specific to the flange sizes that the ring gaskets can fit into (e.g. R or RX 24 can fit into 2-1/16 flanges and R-RX 35 can fit into 3-1/8” flange size, and so on). The key difference between R and RX ring gasket is that the R gasket can be re-used and it good for lower pressures 2000 – 3000 psi and RX is good for 3000 psi and above. This RX is pressure energized and is slightly deformaed when made-up with bolts and nuts or under pressure from within the wellbore. It’s not advisable to re-use it because seallability cannot be guaranteed particularly with high pressure gasses.
Flanges are made up primarily in three ways:
Flanged – where bolts and nuts and used to make-up the flanges (commonly called “pass & tight” in Nigeria)
Studded – where the flanges already have inbuilt bolts, you’ll then need only nuts to make them up
Clamp hub – here, the flanges come as a hub with no holes and a clamp is utilized to fasten them
There is a fourth type is the speedloc clamps (an FMC TM), designed to save connection time.
