Yield Point (YP) is resistance of initial flow of fluid or the stress required in order to move the fluid. You can simply say that the Yield Point (YP) is the attractive force among colloidal particles in drilling mud.
Practically, you can calculate the YP by this following formula.…
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Added by Rachain Jetjongjit on December 10, 2010 at 10:00pm —
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Plastic Viscosity (PV) is the resistance of fluid to flow. In the field, we can get the PV from a viscometer. Typically, the viscometer is utilized to measure shear rates at 600, 300, 200, 100, 6, and 3 revolutions per minute…
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Added by Rachain Jetjongjit on December 9, 2010 at 2:00am —
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e funnel viscosity is time in second of drilling mud flowing through the Marsh Funnel Viscosity. The Marsh funnel is dimensioned so that the outflow time of one quart of freshwater (956 cc) at a temperature of 70 F +/- 5 F (21 C +/- 3 C) in 26 +/- 0.5 seconds.
For all drilling mud, especially oil base mud,… Continue
Added by Rachain Jetjongjit on December 7, 2010 at 10:00am —
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Mud weight or mud density is one of the important drilling fluid properties because it balances and controls formation pressure. Moreover, it also helps wellbore stability. Mud weight is measured and reported in pounds per gallon (PPG), pound per cubic feet… Continue
Added by Rachain Jetjongjit on December 7, 2010 at 10:00am —
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What is flow check?
Flow check is the period that you stop operations such as drilling, tripping pipe and circulating and monitor the well in order to see whether the well is static or not. The time for flow check should be enough to confirm the status of a well. It might be few minutes or it could be as long as 30 minutes depending on the well situation. Normally, many operators… Continue
Added by Rachain Jetjongjit on November 18, 2010 at 9:00pm —
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Trip Tanks are small metal tanks with small capacity about 20-40 bbls with 1 bbl divisions inside and it is used to monitor the well. There are several operations that we can use the trip tank to monitor the well as follows;
1. Trip Out Of Hole (TOOH): While…
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Added by Rachain Jetjongjit on November 18, 2010 at 9:00pm —
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These are some well control formulas that I have learned from my well control school and I would like to share with you guys. Please feel free to comments or give me suggestions.
Pressure (P) - psi
Pressure (psi) = Force (lb) / Area in Square Inch (in 2)…
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Added by Rachain Jetjongjit on October 18, 2010 at 12:30am —
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The
tangential method is the simplest calculation among other
directional survey calculations.
The tangential method formulas are listed below;…
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Added by Rachain Jetjongjit on August 21, 2010 at 2:00pm —
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The
Minimum Curvature Method smooths two straight-line segments of the Balanced Tangential Method by using the Ratio Factor (RF).
The formulas for the Minimum Curvature Method are listed below;
β must be in radians
Where;
MD = Measured Depth between surveys in ft
I1 = Inclination (angle) of upper survey in degrees
I2 = Inclination (angle)…
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Added by Rachain Jetjongjit on August 17, 2010 at 10:30pm —
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I have some
directional calculations that I've shared with you. However, some of them are not shared yet so I will try to share all directional drilling formulas that may be helpful for you in the future.
Today, I would like to show you about
Balanced Tangential Method Calculation. This calculation method…
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Added by Rachain Jetjongjit on August 9, 2010 at 3:30pm —
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Drilling personnel need to fully understand about the lag time. Lag time is time delay from pressure adjustment made on a choke valve or a choke HCR to show up on the drill pipe pressure gauge.
Does it sound confuse? Let’s me explain more about it. When you adjust a choke position, you will not be able to see changes on the drill pipe gauge right away because drilling fluid is compressible so you need to be patient and wait a little bit until you see the…
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Added by Rachain Jetjongjit on August 5, 2010 at 9:30pm —
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Driller’s method is one of several methods to kill the well in well control operation. The main idea of driller method is to kill the well with constant bottom hole pressure. The Driller’s Method of well control requires two complete and separate circulations of drilling fluid in the well.… Continue
Added by Rachain Jetjongjit on August 2, 2010 at 2:00pm —
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After you complete shut in procedure while tripping, there is following information that must be recorded before making any decision on how to kill the well.
Shut-In Casing Pressure (SICP): Read and record… Continue
Added by Rachain Jetjongjit on July 21, 2010 at 1:30am —
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Tripping out of the hole is a critical operation, which drilling team must keep close eye on well control situation that can
occur anytime. Wellbore monitoring and hole filling equipment and must be working properly so that the kick can be quickly detected. You must be aware of and prepared for the well… Continue
Added by Rachain Jetjongjit on July 17, 2010 at 7:30pm —
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There are several figures that must be recorded after the well has been properly shut in in case of a well control situation.
Shut-In Casing Pressure (SICP): Read and record the shut-in casing pressure (casing gauge).
In order to get the proper pressure reading, the casing gauge should be… Continue
Added by Rachain Jetjongjit on July 11, 2010 at 9:30pm —
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While drilling, drilling team must be carefully check for well control indicators and if the positive kick indicator(s) indicated, crew must instantly know how to shut in the well in correct manner. The steps below, called "3S" shut-in procedures, demonstrate how to properly shut the well in while drilling.
Drilling shut in procedures (3S) – HARD SHUT IN… Continue
Added by Rachain Jetjongjit on July 2, 2010 at 11:30am —
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For the drilling industry especially when we talk about well control, there are 2 types of shut in which are Hard Shut-in and Soft Shut-in. This post will describe both shut in types and I wish I would be helpful for you all :)
Hard shut in… Continue
Added by Rachain Jetjongjit on June 24, 2010 at 10:00pm —
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A certain amount of the gas in cuttings will enter into drilling fluid when we drill through porous formations that contain gas. The gas showing on the surface due to drilling through formations is called “Drilled Gas”.
When gas from the cutting comes into drilling fluid, it will expand as it is circulated out of hole, hence, you will see the gas from the monitors… Continue
Added by Rachain Jetjongjit on June 11, 2010 at 1:30pm —
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Lag time is traveling time interval required for pumping cuttings from each particular depth to surface. It can be expressed in terms of time (minutes) and pump strokes.
The lag time always changes when a well becomes deeper and/or pumping speed change. Two factors, affecting lag time… Continue
Added by Rachain Jetjongjit on April 1, 2010 at 1:30am —
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You may have heard about gas show, connection gas and trip gas. What are differences of those term?
Gas show: It is gas that appears in drilling mud and it indicates the presence of gas… Continue
Added by Rachain Jetjongjit on March 29, 2010 at 2:00am —
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Plastic Viscosity (PV) is the resistance of fluid to flow. In the field, we can get the PV from a viscometer. Typically, the viscometer is utilized to measure shear rates at 600, 300, 200, 100, 6, and 3 revolutions per minute…
he funnel viscosity is time in second of drilling mud flowing through the Marsh Funnel Viscosity. The Marsh funnel is dimensioned so that the outflow time of one quart of freshwater (956 cc) at a temperature of 70 F +/- 5 F (21 C +/- 3 C) in 26 +/- 0.5 seconds.
