The positive displacement mud motor uses the Moineau pump principle. However, Downhole mud motors in drilling have limitations. This tool has found wide application in directional drilling and even straight-hole drilling. Drilling mud motor diagrams # 1, 2, 3 & 4 show the basic design of a positive displacement motor. This article will cover the …
Motor selection is a function of the well requirements. This article will introduce the drilling mud motor selection for its specification. At the same time, the drilling engineer cannot make a proper selection without a full understanding of the drilling mud motor specifications and limitations. And we, of course, shall cover them all. In brief, …
There is only a small distance between slots on multi-well projects, mainly offshore. To eliminate the risk of collisions directly beneath the platform (platform rigs), a proposed well path is compared to existing and other proposed wells. The distances between other wells and the proposal are calculated frequently in the critical section. These anti-collision calculations …
This article aims to show the directional well trajectory calculation methods required for all well profile design planning, including build, hold, and drop sections, and to show the utilization of trajectory and directional survey calculation methods by designing the well path of two wells. Please note that this article is one of our Directional Drilling …
Well Planning is perhaps the most demanding aspect of drilling engineering. It requires the integration of engineering principles, corporate or personal philosophies, and experience factors. Although well-planning methods and practices may vary within the drilling industry, the result should be a safely drilled, minimum-cost hole that satisfies the reservoir engineer’s oil/gas production requirements. Objective Unfortunately, …
This article aims to understand how to perform various directional drilling survey calculation methods and terminology. We will provide a simple Excel spreadsheet to help in your calculations as an average angle, radius of curvature & minimum curvature Directional surveying spreadsheet. Nowadays, you will find a lot of software for directional drilling survey calculation methods. …
Definitions Ellipsoid is the name of the volume obtained when an ellipse is rotated about one of its axes. Specifically, an oblate spheroid is an ellipse rotated about the shorter (semi-minor) axis. The Earth is not an exact ellipsoid, and deviations from this shape are continually evaluated. The curvature of the Earth’s surface is not …
Sedimentary rock types Terrigenous sediments (clastic) These are land derived sediments sub-divided further on the basis of their grain size. Clay 1- Clay minerals are hydrous platy aluminosilicates. 2- Clay minerals can be subdivided into five important groups with different chemical and physical characteristics; kaolinite, illites, smectites, chlorites and glauconites. 3- “shale”, generally used to …