Categories of Well Control

Primary Well Control is hydrostatic pressure provided by drilling fluid more than formation pressure but less than fracture gradient while drilling. Technical Data used in the field explained in oil and gas courses in Rawalpindi. If the hydrostatic pressure is less than reservoir pressure, reservoir fluid may influx into a wellbore. This situation is called "Lost Primary Well Control". Not only is the hydrostatic pressure more than formation pressure, but also it must not exceed fracture gradient. If your mud in hole is too heavy causing a broken wellbore, you will face with a loss circulation problem. When fluid is losing into formation, a mud level in well bore will be decreased that will result in reducing overall hydrostatic pressure. In the worst case scenario, you will lose the primary well control and wellbore influx will enter into the well.

Typically, slightly overbalance of hydrostatic pressure over reservoir pressure is normally desired. You must maintain hole with drilling fluid that will be heavy enough to overbalance formation pressure but not fracture formations. Some more details of oil and gas courses in rawalpindi are as under.

The primary well control is the hydrostatic pressure that prevents reservoir influx while performing drilling operations (drilling, tripping, running casing/completion, etc.). When the primary well control is failed, it causes wellbore influx (kick) coming into the well. Therefore, this situation needs special equipment which is called "Blow Out Preventer", simply called as "BOP", to control the kick. For this reason, "Blow Out Preventer (BOP)" is the secondary well control. Please also remember that the BOP must be used with specific procedures to control kick such as a driller's method, a wait and weight method, lubricate and bleed procedures and a bull-heading method. Without proper well control practices to use the BOP, it will just be only heavy equipment on the rig. TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join oil and gas courses in Islamabad.