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Directional Drilling Handout from Texas AM
I would like to share very useful Power Point slide in the topic of directional drilling which is belong to Texas A&M university, USA. Directional Drilling – When is it used? Type I Wells (build...
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Magnetic and Gravity Toolface and How To Interpret The Meaning For...
Magnetic and gravity tooสface are terms in directional drilling world to describe the direction of the well. They are different in meaning and application therefore this article will teach you about...
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Ouija Board Directional Drilling Excel Spreadsheet
Ouija Board is a method that directional drillers use to calculate inclination and azimuth at the bottom or distance and tool face to drill at required direction. Figure 1 is an Ouija board. Figure 1 –...
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Vibration Mechanisms In Drillstring by SperrySun
Vibration in drillstring is one of major downtime associated with drilling operation. Therefore, it is very important to learn and understand what each vibration mechanism is. This VDO created by...
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Shock and Vibration in Drilling VDO
This is one of excellent VDO demonstrating shock and vibration in the drillstring by Schlumberger. In this VDO, you will learn about mechanisms of shock and vibration, types of whirls and how these...
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Directional Well Planning and Well Profile
The well planning process starts from geologists and reservoir engineers who decide the best place for the wellbore. They may only need to determine a single target, which will often be a tolerance of...
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Deviating the Wellbore by Jetting and Whipstock (Directional Drilling)
To deviate a well from a vertical path, and get it to follow an intended well trajectory , it is necessary to put some side force onto the bit. The amount of this, as well as its direction, are vital...
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Deviating the Wellbore by Positive Displacement Motor (Directional Drilling)
A positive displacement motor (PDM) is one of the most popular tool for drilling a directional well. It works by boring downwards and pumping mud through the motor itself. As shown in figure 1, the...
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Directional Drilling by Rotary Drilling Assembly
Rotary drilling assemblies can typically control a directional of a well by having proper stabilizer placement. With this kind of drilling assembly, only inclination can be controlled and a well cannot...
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Directional Control by Rotary Steerable
Nowadays, many wells required complex well trajectory plans in order to reach reservoir sections and some of complicated well paths (Figure 1) cannot be drilled with either rotary drilling assemblies...
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Directional Drilling Calculation Example for J-Profile Well
This article demonstrates how to design the well trajectory in J-shape from the surface location to the required target depth (TD). Information Given The surface location coordinate of Well-A is...
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Basic Knowledge about Multilateral Well and Completion
A multilateral well is a well with two or more laterals (horizontal, vertical, or deviated) drilled from a main mother well. This allows one well to produce from several reservoirs. Multilateral wells...
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Down hole Reamer – Its Application in Directional Drilling
Not only are reamers important for directional drilling, but they can also be useful in straight hole applications. Reaming assemblies can straighten out and smooth over crooked holes, restore...
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What are Drilling Jars?
Most modern drilling jars are hydraulic. They are also usually double acting, meaning they can deliver an extra-heavy impact should the bottom hole assembly become stuck. They are intended to work as...
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What are Shock Subs and Its Applications?
Shock subs, also known as vibration dampeners, are used to absorb vibrations and bit shock loads in drill collar strings. They usually feature long integral elastomeric elements, which serve to...
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What are Hole Openers for Drilling?
Hole openers are used to increase size of well bore and there are two broad categories of hole openers: fixed diameter hole openers, and under-reamers. Fixed diameter hole openers are usually made up...
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What are Positive Displacement Mud Motors in Drilling for Oil and Gas?
Positive-Displacement Motors (PDM) make use of a power generation section which is made up of a rotor/stator combination. In order to move a rotor part, a PDM requires hydraulic power from drilling...
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What are Turbine Drilling Motors?
Turbine Motors work by harnessing the energy of a continuous flow of steam which passes through them. More specifically, drilling fluid travelling down the drillstem is deflected by the blades of a...
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