Drilling fluids have a high viscosity and flow under a great amount of pressure. During any downhole operation, it is important to ensure that drilling fluid pressure is measured properly so that the rig will produce the highest yield possible. However, if any debris in the hydraulic line interacts with the gauge, it can affect the way the gauge functions, causing inaccurate readings. Using a diaphragm protector will help to maintain accurate pressure readings and help to ensure many years of service for a hydraulic pressure gauge.
How Does a Diaphragm Protector Work
A diaphragm protector (also known as an E17) keeps the gauge free of debris so that it can measure drilling mud pressure accurately and efficiently. Protectors are connected to the drilling mud system and shield the remote-mounted pressure gauge so that it doesn’t get clogged or damaged. The way a diaphragm protector works is that the diaphragm seal is also filled with the same fluid as the system. When pressure is applied on the hose, it forces pressure through the lower housing against the rubber diaphragm which then forces pressure to the upper housing. With the use of a high pressure hose, this pressure is then transmitted to the gauge where the force can be measured. By having a diaphragm in place, it works as a barrier to keep debris or corrosive materials from entering the gauge and harming the bourdon tube and gauge’s other working parts.
A variety of debris exists in drilling mud, such as cement, acid or mud. Diaphragm protectors offer an economical solution to constantly replacing broken gauges. Diaphragm protectors are set up as a 1: 1 pressure signal ratio and transmit the signal to the remote mounted gauge. By protecting the gauge, it will remain sensitive to the slightest pressure variations, giving the driller a more precise picture of what is going on downhole.
Why Use Diaphragm Protectors
Diaphragm protectors are rugged and durable, offering years of service from both the protector and the gauge it shelters from debris. They are easy to maintain and can be repaired in the field, ensuring that little to no time is lost with a broken part. Using diaphragm (E17s) are an economical solution to measuring mud pump pressure without having to repair and replace hydraulic gauges.