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. …
The Inside BOP (IBOP) as gray valve is a back-pressure type valve (or float valve) that allows stripping operation using drilling kelly / top drive or running drill pipe into the hole without mudflow upward through the valve. It can be stabbed and made up on the drill pipe only at very low flow rates. …
The annular preventer (also called bag type, spherical, or universal preventer) is the most versatile piece of equipment on the BOP stack since it can close around the casing, drill pipe, drill collars, wireline, and even close an open hole. The rubber packing elements of the annular preventers, which allow this flexibility, are also subject …
Absolute permeability is a rock’s ability to transmit a fluid when its connected pore space is completely saturated with a single phase. It is written as k and commonly reported in millidarcies (mD). It describes flow capacity; porosity describes storage space. [1] What is absolute permeability? A single-phase permeability test establishes the reference flow property …
A top drive is an essential part of the drilling equipment. It is located on a drilling rig (Check also types of drilling rigs) hoisted on a rig mast or a derrick. The top drive is a combination of electrical and mechanical motor systems. Top drives have a variety of advantages and prove beneficial in …
Yield Point in drilling mud is defined as the measure of the fluid’s initial flow resistance or the calculation of a value required to move the fluid in terms of shear stress. It can also be stated that the yield point is equivalent to the force of attraction between the particles of fluid colliding with …
Underbalanced drilling technique involves drilling the formation with drilling fluids having lesser hydrostatic pressure than the formation pressure. The lesser hydrostatic pressure of drilling fluids can occur naturally or it can be formulated by adding certain substances like methane, air, or nitrogen (N2) in the liquid phase. This technique results in the inflow of formation …
During well control operations, the maximum allowable borehole fluid pressure at the casing shoe is normally considered to be the critical factor, based on the assumption that the weakest formation is at the shoe. For pracÂtical purposes, the corresponding pressure at the surface (Drilling MAASP or Maximum allowable annular surface pressure) is calculated through specific …
When manufactured, the new drill pipe will be subjected by the manufacturer to a series of mechanical, tensile, and hydrostatic pressure tests & inspections by API Specifications 5A and 5AX. This will ensure that the pipe can withstand specified loads. A joint of drill pipe will however be used in several wells. When it has …
The tripping pipe can be defined as running in or pulling out of the hole with the drill string. In this article, we have prepared a complete guide for who needs to learn its operations on the surface and who needs to understand its procedures to prevent any unforeseen problems. During such trips, the potential …