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, …
In general, we can define the burst pressure in a drill pipe as the differential pressure acting across the drill pipe wall due to an internal pressure greater than the external pressure. In this article, we shall discuss the drill pipe burst pressure formula and calculations used in drill string design. How To Consider Burst …
The Drill Pipe may sometimes be subjected to external pressure, which is higher than the internal pressure. This condition usually occurs during drill stem testing and may collapse the drill pipe. The differential pressure (external pressure minus internal pressure) required to produce collapse is calculated for various sizes and grades of new and used drill pipe …
The common drill pipe length is basically from 27-30 feet, which is classified as range-2 R2. This article will discuss their range and how to perform their design. What is The Common Drill Pipe Length Ranges The Drill String is made up of several sections of Drill Pipes. The term “stand” consists mainly of two …
To select the proper drill collar for the bottom hole assembly, we should understand what is the drill collar specifications. Generally, drill collars are identified by the following parameters: Drill Collar Sizes The hole size and bit program will determine the best drill collar size, but the collars selected usually have the largest OD and …
