FIT or formation integrity test can be defined as the application of pressure by superimposing a surface pressure on a fluid column in order to determine the ability of a subsurface zone to withstand a certain hydrostatic pressure. Why FIT? The reason for performing the formation integrity test or formation competency test is to determine …
This article covers all formulas that are used while well control situations on the drilling rig ( Check also: Drilling rigs Types). Pressures Formulas HYDROSTATIC PRESSURE (all depths TVD): Constants: PRESSURE, psi = Mud Weight x Constant x Depth, (TVD) PRESSURE GRADIENT, psi/ft = Mud Weight x Constant OR = Pressure, psi ÷TVD, ft MUD …
Kill sheets are used to calculate the mud weight, mud quantities, and pumping times required to bring a well back to primary control after a gas kick. A description of how to complete kill sheets will be discussed in this article. The kill sheet is a printed form that contains blank spaces for recording information …
The system used for closing the BOP’s is a high-pressure hydraulic fluid accumulator unit. Hydraulic fluid is stored under pressure, the pressure being provided by stored nitrogen. When hydraulic oil is forced into the accumulator by a small volume, high-pressure pump, the nitrogen is compressed, storing potential energy. When the BOP’s are activated the pressured …
A Blowout Preventer (BOP) Control System as one of the drilling rig components, is a high-pressure hydraulic power unit fitted with directional control valves to safely control well kicks and prevent blowouts during drilling operations. A typical system offers a wide variety of equipment to meet the customer’s specific operational and economic criteria. The following …
Always Be Prepared for Complications & Problems During Well Control Operations Note: If a problem develops while killing a well, “NOTE and RECORD” the drill pipe and casing pressure, stop the pump, shut in the well, and then, evaluate the situation. Well-controlling pressure is provided by using the horsepower of the mud pumps and the …
Bullheading is a technique that may be used in certain circumstances during drilling operations to pump an influx back into the formation. In other words, it is a term to denote pumping into a closed-in well without returns. A major concern with this technique is that it may result in fracturing any exposed formation. Bullheading …
We usually use a calibrated trip tank in drilling to measure mud volumes accurately and change mud volumes while tripping. It must be available on all rigs & must have a level indicator easily readable from the driller’s position. Such an indicator must be accurate to within one-half barrel volume. It is unsafe to trip …
Unexplained changes in the readings on the Flow Show and PVT recorders should be investigated promptly. This usually takes the form of a flow check. In other words, They are implemented to guarantee that the well is stable. it should be carried out with the mud pumps off to check the well with Drilling ECD …
The choke manifold is an arrangement of valves, fittings, lines, and chokes that provide several flow routes to control the flow of mud, gas, and oil from the annulus during a kick ( Kick warning signs – Causes of kick in drilling). Here you shall learn choke manifold parts, function & IADC recommendations in drilling. …