(007)Selecting Orifice using Winpul31

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Selecting the Orifice using WINPUL Software
At the completion of this presentation you should be able to:
1. Select the correct orifice for the 650, Slimhole, and Superslim systems.
2. Select the correct orifice and poppet stand-off for the 1200 system.
3. Use the sensitivity analysis to predict the results of “What-if?” situations.

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What is an Orifice?
An opening through which the mud flows
Part of a flow restrictor (with the poppet) that creates the pulse
Made of solid tungsten carbide to resist erosion

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What does it do?
The poppet extends into the orifice to create the positive pulse

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What does it do?
Approximate retracted position

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What does it do?
Approximate extended position

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Types of Orifices
Three types
Standard
Used on 650 system
Dovetail
Used on Slimhole and Superslim
1200 system
Used on 1200 system only

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
These are Orifices
Standard
Dovetail
1200 System

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What’s the deal with the Funky looking Dovetail?
Designed for better lost circulation material (LCM) tolerance
Additional benefit of limiting lateral movement of the poppet
Disadvantage of unbalanced erosion

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What’s the deal with the Funky looking Dovetail?
Cannot be reversed, tapered side always towards the poppet

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Orifices come in several different sizes

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Orifices come in several different sizes
Twenty-two standard orifice sizes
1.5625 to 1.6375 inch
In increments of 0.0125 inch
1.650 to 2.000 inch
In increments of 0.025 inch

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Orifices come in several different sizes
Sixteen dovetail orifice sizes
1.5625 to 1.6375 inch
In increments of 0.0125 inch
1.650 to 1.850 inch
In increments of 0.025 inch

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Orifices come in several different sizes
Six 1200 orifice sizes
1.85 to 2.35 inch
In increments of 0.1 inch

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
How do we Measure orifice Size?
Caliper the ID of a standard orifice

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Caliper the Orifice ID

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
How do we Measure orifice Size?
Use a gauge for a dovetail orifice

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Gauging a Dovetail Orifice

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Gauging a Dovetail Orifice

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Gauging a Dovetail Orifice

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What’s the original ID of a worn orifice?
The ID of used orifices may be larger than the original ID
The original ID will be the next smallest standard ID size

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What’s the original size of a worn orifice?
For Example
If the worn orifice’s measured ID is 1.642 inch
This is between a 1.6375 and a 1.650 inch orifice
The ID when new must have been the smaller of the two, a 1.6375 inch

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Using a worn orifice
The downstream side of a standard orifice will become rounded due to erosion

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Using a worn orifice
Sharp Edge
Rounded Edge

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Using a worn orifice
If the orifice passes the wear-out criteria it can still be used
Install the orifice with the rounded edge away from the poppet

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Why do we have different sizes of Orifices?
As mud flow rate increases the orifice opening must also increase to reduce the force on the poppet in the extended position
Limited to 800 lb for MKVI/MKVII
Limited to 1000 lb for MKVIII

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
How do we Select the Correct Orifcice Size?
Use WINPUL software

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
This is WINPUL

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What does WINPUL Do?
Selects orifice size for all systems
Calculates poppet stand-off for the 1200 system
This is the distance between the poppet and the orifice in the retracted position
This distance is variable for the 1200 system. It is a fixed distance for all other systems

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What does WINPUL Do?
Calculates approximate
Downhole generated pulse amplitude
Poppet load
Pulsing and non-pulsing tool pressure drop

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What does WINPUL Do?
Provides Sensitivity Analysis or What-if?
Change inputs
Orifice ID
Poppet stand-off (1200 System only)
Flow Rate
Mud Weight
Plastic Viscosity

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What does WINPUL Do?
Provides Sensitivity Analysis
View results for up to four cases
Downhole generated pulse amplitude
Poppet load
Pulsing and non-pulsing tool pressure drop

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
How do I use WINPUL?
Nine inputs required
Pulser Type
MKVI / MKVII or MKVIII
System Configuration
1200/1500
650
Slimhole
Superslim
Drillpipe/Coil Tubing ID

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
How do I use WINPUL?
Drill Collar ID
One of the following
Number and size (in 32nds) of jets
Total flow area (TFA)
Pressure drop below the tool (PD)
Poppet cylinder OD
Flow rate
Mud weight
Plastic viscosity

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
What are the input units?

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Measuring Poppet Cylinder OD
Cylinder

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Measuring Poppet Cylinder OD

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
View Results
Poppet Stand-off is only for the 1200 System
Changes according
to pulser type
Orifice ID based
on Target Flow & Mud
Poppet Load
must not exceed
800 lb or 1000 lb

© 2001, Halliburton Energy Services, Inc.
January 12, 2001
Select orifice ID and evaluate performance under various conditions
Sensitivity Analysis