The document details an experiment on funnel viscosity using the Marsh funnel to measure the change in viscosity of drilling mud. It includes the aim, theory, procedure, and common questions related to the experiment, emphasizing the quick and straightforward nature of the test. Key factors affecting viscosity, advantages of the method, and specific equipment use are also discussed.

1. Petroleum engineering
Faculty of Engineering
Koya University
Drilling Engineering
Laboratory
Experiment No. 4: Funnel Viscosity
Date: Jan. 16th
2018
Supervised By: Prepared By:
Mr. Pishtiwan Jarjis Muhammad
Mr. Muhammad Group: B

2. Funnel Viscosity Experiment Jarjis Muhammad
Contents:
Subject Page
Aim 1
Theory 2
Introduction to Experiment 3
Funnel Viscosity Calibration 4
Procedure 5
Discussion 6
References

3. Funnel Viscosity Experiment Jarjis Muhammad
Aim of the experiment:
Determine Change in Viscosity of mud by using Marsh Funnel.

4. Funnel Viscosity Experiment Jarjis Muhammad
Theory:
Marsh funnel is an instrument used in determining the Marsh
funnel viscosity. The Marsh funnel is a container with a fixed
orifice at the bottom so that when filled with 1500 cc freshwater,
1 qt (946 ml) will flow out in 26 0.5 sec. For 1000 cc out, the
efflux time for water is 27.5 sec. It is used for comparison
values only and not to diagnose drilling fluid problems.

5. Funnel Viscosity Experiment Jarjis Muhammad
Introduction to Experiment:
Mud Water Marsh Funnel
Container Measuring Jug

6. Funnel Viscosity Experiment Jarjis Muhammad
Funnel Viscosity Calibration:
Fill the funnel to the bottom of the screen (1500 ml) with water
at 70 ºF (plus or minus 0.5 ºF) time of outflow of the quart
(946 ml) should be 26 seconds plus or minus 0.5 second.

7. Funnel Viscosity Experiment Jarjis Muhammad
Procedure:
1. Prepare a mud that made from water and bentonite.
2. Hold one finger over the orifice at the tip of the funnel. Pour
the mud sample through the funnel screen until mud reaches
the bottom of the screen (1500 cm3). Place viscosity cup
beneath funnel tip. Remove finger and start (stop watch).
2. Stop the watch when the mud level reaches the 1-qt (946ml)
mark on the viscosity cup.
3. Record the number of seconds required to outflow 1-qt of
mud. And the unit of Funnel Viscosity is (sec/qt) API.
4. Measure and record temperature of mud sample to ±1°F.

8. Funnel Viscosity Experiment Jarjis Muhammad
Discussion:
Q1/What are the errors that we faced in this lab
experiment?
1-qualitive of mud
Avoid/ get a best quality of mud
2-humans errors like wrong in recording time
Avoid/ use a good device to record time and will do it
accurately.
Q2/ what is the difference between n viscosity and
apparent viscosity?
A/the viscosity of a fluid is a measure of its resistance
to gradual deformation by shear stress and tensile
stress.... for a Newtonian fluid, the apparent viscosity is
constant, and equal to the Newtonian viscosity of the
fluid, the apparent viscosity depend on the shear.
Q3/ what are the advantages of this experiment?
Ans/This test has the advantage of being quick, simple,
and requiring Very little equipment.

9. Funnel Viscosity Experiment Jarjis Muhammad
Q4/what are the factors that affect viscosity?
A/fluid viscosity changes with temperature, pressure
has a small impact on gas viscosity and the pressure
impact on the viscosity of a liquid is very small, when
studying multiphase liquids (a mixture of gas, liquid
and solids).
Q5/what the unit of marsh funnel?
Ans/its measurements is the time (in second) required
for one quart of mud to flow out of a marsh funnel into
a graduated mud cup (measuring jug).

10. Funnel Viscosity Experiment Jarjis Muhammad
Q6/what is a use of measuring jug?
A/measuring jug is a demarcated vessel used to
measure liquid ingredient, especially hold volumes
about 946mL, measuring jug or measuring cup may be
made of plastic, glass, or metal.
Q7/where is the location of marsh funnel in well site?
Ans/ The location of the marsh funnel in well site is
right on the mixed tank.
Q8/ what is the application of Mesh?
- The application of Mesh is to hold any cutting or solid
impurities that may we have inside the mud
Q9/can we use a measuring jug for dry ingredients?
A/Dry measuring cups are meant to be filled to the
brim so you can sweep off the excess. If you tried to
use a liquid cup, you couldn’t sweep off the excess
because of that extra below the rim. So to measure it,
you’d have to the ingredient down or shake the cup to
level it out.
Q10/is marsh funnel field unit or lab unit?
Ans / the marsh funnel is field unit not in lab unit

11. Funnel Viscosity Experiment Jarjis Muhammad
References:
1. ASME Shale Shaker Committee.: “Drilling Fluid
Process, 2005.
2. Priston L. Moore: “Drilling Practices,” PennWell
Publishing Company Tulsa, 1986