Mechanical specific energy (MSE) is the mechanical work used to drill a unit volume of rock. It combines weight on bit, torque, rotary speed, bit area and rate of penetration into one measure of rock-cutting performance. In field units, MSE is normally expressed in psi. Its most useful application is tracking how drilling efficiency changes …
Well blowout is an uncontrolled release of flowing fluids (e.g., gas, oil, water, and mud) from a well once pressure control systems such as BOP Stack are completely lost. This uncontrolled flow will end up with a well kick that increases in severity and may result in a “blowout”. The well control can only be recovered …
The Jar Intensifier is perhaps one of the most outstanding devices designed to help fishermen successfully complete difficult fishing jobs in the oil and gas field. The tool is designed to become a fishing string component and work in conjunction with a hydraulic jar to ensure that the jarring blows are concentrated at the stuck …
A landing nipple is a completion-tubing component with a machined locking profile and sealbore for a compatible lock mandrel and downhole device. Selective systems allow a chosen landing location; no-go systems use a locating shoulder. The nipple provides the receptacle, but the installed plug, valve or instrument assembly determines the function. This guide explains landing-nipple …
Check(s): Comments: BOP Control Unit pressures & leaks: Check pressures of accumulator (3000 PSI), manifold (1500 PSI) and annular (between 700 and 1500PSI subject to ‘requirements’). Check air pressure to air pumps (125 PSI). Look and listen for any leaks of air or oil. Remove the two inspection caps from the reservoir and look along …
The impression still exists that snubbing or hydraulic workover units are exclusively used on blowouts or otherwise uncontrollable wells, which is false. The running of tubulars under pressure has indeed made it possible to bring many wells under control at a considerable saving to the industry, but the ability to perform many routine workovers- and …
The casing pipe is mandatory in drilling operations as it has a lot of casing functions to prevent cave-in of unconsolidated formations, isolate problem zones, and many more. As mentioned before in our casing design guide, the selection of casing depends on many factors. Here in this article, we shall learn everything about the best …
Drill string design Calculations are made to help you select items from a list of ready-made Drill string components, not deciding what an individual component will look like. The objectives of our design efforts should be to: This Article covers simple drill string design steps for vertical and directional wells. Loads applied by tension, torsion, combined …
The first step in drill string design is designing a Bottom Hole Assembly (BHA). The BHA comprises various components that work together to enable drilling engineers to achieve their drilling targets. Designing a BHA involves several critical steps that drilling engineers must consider to ensure that the drilling operation is safe, efficient, and successful. In …
Drilling slips exert hoop compression on the Drill Pipe which can deform the pipe in unfavorable conditions. This article will teach the drill pipe slip crushing formula and calculations. Slip Crushing Constant A unit tensile stress St from hanging weight will result in a hoop stress Sh that is a function of many factors such as slip length, …