iCruise Pre-Job Mobilization

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 Pre-job Mobilization
HMS and
Post-Drilling iCruise docs
Procedures

Best practice Tool Theory

Troubleshooting

Pre-Job
Vibration Mobilization

Downlink Analysis Pre-Drill

Procedures

GeoSpan Drilling
Operations

iCruise
CruiseControl

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 Learning Objectives

 At the end of this session, you should be able to

 Define Pre-Job Mobilization procedures
 Describe bit requirements to run iCruise
 Perform an ICruise Tool Orifice change
 Define Tool Configuration options
 Describe the best practices when running MARSS
 Describe Hydraulic analysis related to iCruise
 Describing the Pre-Deployment Field Verification checklist

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 iCruise Field Operations Workflow – Pre Job Mobilization

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 iCruise Technical Specifications

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 iCruise Technical Specifications (Cont.)

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 Tool Configuration - Bit Selection

 There are specific bit designs to fulfil all engineering criteria and
to maximize DLS capability, improve ROP, and reduce vibrations

 It is required to consider the following:

 Bit length
 Bit gauge length (short – 2 to 4 in)
 Bit gauge relief (0.3°) (tapered or stepped)
 Laterally Aggressive Profile and Cutter Placement
 Bit shank length, number of blades, and angle
 Type and size of PDC insert
 SCE value calculated by DxD at 10°/100 ft DLS: SCE ≥ 0.15
 Bit jet nozzle quantity and size as per hydraulic
requirements

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 Tool Configuration - Bit Selection Recommended
contact area
between bit and
wellbore (Sideways)
 Bit gauge length (short – 2 to 4 in) – Provides short to
“bend” distance, increasing DLS capability

 Bit gauge relief (0.3°) (tapered or stepped) – Bit gauge

contacting with the borehole will negatively impact the Applied side force
DLS capability, reducing lateral ROP (DLS).
Section that will
negatively impact
lateral ROP if is in
contact with the
wellbore

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 Tool Configuration - Bit Selection
 Laterally Aggressive Profile and Cutter Placement

 SCE value calculated by DxD at 10°/100 ft DLS: SCE ≥

0.15

 SCE is a calculated input to predict the bit capability to drill

laterally (lateral ROP). The calculation is based on many
factors, such as:

 Lateral aggressive profile

 Cutter Placement and angle of attack
 Number of lateral cutters
 Gauge relief profile.
 WOB
 Borehole inclination
 And other many factors

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 Tool Configuration - SCE (Side Cutting Efficiency) – Methodology for calculation

Example #01:
SCE: 0.25 (25.37%) with no gauge element contact and no gauge pad contact

Slop a 0.0055729 Slop b 0.0014142

200 1.5

180

160

140
1

120

Lateral ROP (ft/hr)

Axial ROP (ft/hr)

100

80

0.5
60

40

Whole bit Whole bit

20 Primary + Backup + DOCCs Primary + Backup + DOCCs
Primary + Backup Cutter Primary + Backup Cutter
Primary Cutters Only Primary Cutters Only
0 0
0 2 4 6 8 10 12 14 0 1000 2000 3000 4000 5000 6000 7000
WOB 4 Side Force (lbs)
10

Axial ROP based and curter structure elements and design. Lateral ROP based and curter structure elements and design.
Example: Using 40K WOB the Cutting efficiency for axial ROP Example: Using 1K Side force (pad force) the Side Cutting
Will generate 150 f/h ROP. efficiency for lateral ROP will generate 1.25 f/h lateral ROP.
© 2018 Halliburton. All rights reserved.
 Tool Configuration - SCE (Side Cutting Efficiency) – Methodology for calculation

Example #02:
SCE: 0.045 (4.58%) with gauge element contact and gauge pad contact

p p
200 1.6

180

1.4

160

140 1.2

120

Lateral ROP (ft/hr)

Axial ROP (ft/hr)

100

0.8
80

60
0.6

40

0.4
Whole bit Whole bit
20 Primary + Backup + DOCCs Primary + Backup + DOCCs
Primary + Backup Cutter Primary + Backup Cutter
Primary Cutters Only Primary Cutters Only
0 0.2
0 2 4 6 8 10 12 14 0 0.5 1 1.5 2
WOB 104 Side Force (lbs) 104

Axial ROP based and curter structure elements and design. Lateral ROP based and curter structure elements and design.
Example: Using 30K WOB the Cutting efficiency for axial ROP Example: Using 10K Side force (pad force) the Side Cutting
Will generate 130 f/h ROP. efficiency for lateral ROP will generate 1.1 f/h lateral ROP.
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 Tool Configuration - Bit Selection (Comparing Point the Bit vs Push the Bit)
Positive bit angle of attack (Point the bit system) Negative bit angle of attack (Push the bit system)

Geo-Pilot Dirigo iCruise

On iCruise operations SCE is one of the most critical parameters for a successful job.
Observe how the bit behave with iCruise, the negative tilt angle makes the side cuter
structure essential to generate the Lateral ROP (DLS).
© 2018 Halliburton. All rights reserved.
 Tool Configuration - Bit Selection

 Not all PDC bits are designed for RSS push-the-

bit applications such as iCruise®, nevertheless
different PDC bits could be used taking in
consideration the SCE in MaxBHA analysis and
avoid tool poor steerability performance.

 Roller-cone bits and bi-center bits do not match

the engineering criteria for iCruise®.

© 2018 Halliburton. All rights reserved.

 Tool Configuration - Steering Head Tool Orifice

 iCruise pad force is a function of differential pressure below the flow control
manifold. This is typically achieved by managing the total flow area (TFA) of the bit
and the internal restrictor nozzle to create the desired pressure drop.
 In less consolidated formations, steering performance from iCruise can be improved
by increasing the TFA at the bit and using a restrictor nozzle in the iCruise creating a
similar overall pressure drop as a tighter TFA.
 The positive effect of installing a restrictor nozzle is that the hole does not enlarge
as much due to the hydraulic impact of fluid jetting the formation as it exits the bit.
This results in the iCruise pads are not pushing on an enlarged borehole and
directional output not being compromised.
 Where the formation being drilled has a higher degree of mechanical competence,
this approach is not required, and the hole has more of a tendency to maintain its
size. An improved rate of penetration (ROP) can be achieved by negating the use of
a restrictor nozzle and optimizing the hydraulic horsepower per square inch (HSI).

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 Tool Configuration - Steering Head Tool Orifice

 Some problems have resulted from deploying the iCruise using wrong restrictor nozzle:

 Low DLS performance due low

pad pressure or enlarged wellbore.

 Pad seals damaged.

 Drill bit pin/Structure washout

© 2018 Halliburton. All rights reserved.

 Tool Configuration - Steering Head Tool Orifice

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 Tool Configuration - Steering Head Tool Orifice

 Orifice Sizes:
 4 ¾” – 42/26/23/20
 6 ¾” – 60/48/36
 8” – 80/60/50
 9 ½” – 90/80/70

© 2018 Halliburton. All rights reserved.

 Tool Configuration - Steering Head Tool Orifice

The old thread-on tool orifice on 8.00" iCruise® should be set up at the shop. The installation and removal of
the orifice might require additional tooling and might not be done safely at the rig site. The new bolt-on design
for the 8" tool mimics the other tool sizes, making the restrictor easier to replace. There is no need for special
tooling for installation and disassembly. Figure 2-26 shows the difference between the two different designs.
Reference TF-IC-019_B

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 Knowledge Check 1

1. As a group briefly describe the main steps for changing the Steering Head Tool Orifice?

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 iCruise Configuration

VCL (Vertical / Curve / Lateral Configuration)

Lateral configuration

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 Tool Configuration - VCL Configuration

 The iCruise™ BHA for VCL (vertical curve and lateral) applications is configured to
maximize steering control and DLS capability while minimizing vibrations, stresses, and
bending moments in critical collar connections. The VCL BHA is configured as follows:

 1/8" Under Gauge Steering Head Stabilizer

 Tool Flex/SuperFlex (Depending on DLS Requirements)
 1/8" Under-Gauge Control Stabilizer Sleeve Added on I/P Collar
 3/32” to 1/4" Under-Gauge ILS
 DM/Dummy DM Flex Collar

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VCL (Vertical / Curve / Lateral Configuration)
 Tool Configuration – VCL Configuration

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 Tool Configuration - Lateral BHA Configuration

 The iCruise™ BHA for lateral drilling applications is configured to maximize steering control
in horizontal drilling. The lateral BHA is configured as follows:

 No Steering Head Stabilizer

 No Tool Flex/SuperFlex
 1/8" Under-Gauge Control Stabilizer Sleeve Added on I/P Collar
 No ILS (inline stabilizer) on Top of I/P Collar
 No Flex Collar on Top of ILS

 Analyses should be confirmed by MaxBha simulation. It may vary depending to local

needs.

Lateral configuration
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 Tool Configuration - Lateral BHA Configuration

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 ICruise – Tool Size & Hole Size Configuration

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 Tool Configuration – InSite Geometry

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 MARSS (Motor Assisted Rotary Steerable System)

 Read the section 2.5 to 2.7 in the iCruise® Best Practice.

 Time: 10 minutes

 Benefits of MARSS
 Faster drilling but do not want to increase drill string speed, only bit speed
 Decrease wear on casing strings in extended reach wells
 Reduce stick-slip
 Want the power of a next generation motor but still want RSS control
 Overcome rig weakness

PDM MWD/LWD RSS BIT

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 MARSS – BHA Configuration

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 MARSS

 PDM
 Straight housing
 No bend
 Provides downhole torque to the lower BHA

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 MARSS - Risks

 No mechanical connection with the lower BHA

 If the stator fails there will be no way to transmit torque to the bit
 If stuck below the motor you will not be able to put back wraps or run a string shot
 If stuck below the motor and attempt to circulate will cause the motor to attempt rotation, which could
lead to a twist off
 The motor will start in a stalled condition, porting the rotor will help alleviate the issue

© 2018 Halliburton. All rights reserved.

 MARSS Pre-Run Considerations

 Ensure planned surface + motor RPM is within the limits of the iCruise® and M/LWD tools in the BHA

 Allow enough RPM variation to mitigate vibration.

 iCruise® RPM limit: 400
 LWD limit: 180-250 RPM (Special Condition1)

 Hidden differential pressure refers to the portion of the motors capacity used to rotate the BHA
 When using the motor performance charts, reduce the maximum operating differential pressure
by 30%-50% depending on the drilling application

© 2018 Halliburton. All rights reserved.

 MARSS Pre-Run Considerations

 Start the pumps before and allow the SPP to stabilize before starting drillstring rotation. Do not rotate
with the pumps off
 Stage the pump on slowly after connections
 Do not adjust string rotation speed while the motor is operating on bottom
 If reaming with the assembly, use differential pressure and hookload evaluate parameters. (similar to
reaming with a motor)
 Downlinking at high WOB may induce stalling, it is recommended to reduce WOB or pick up off
bottom to downlink
 Good drilling practices and communication. Emphasize that circulation = rotation with this assembly.
 Monitor and mitigate vibration

Picking off bottom MARSS BHA is the last option for DL troubleshooting. DL should be on bottom
reducing WOB and keeping constant ROP/Controlled Diff Pressure.

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 Hydraulic Analysis

 To obtain the required force on the pad and the ideal flow to the turbine, hydraulics
analysis must be performed.

 The analysis is performed by SE and must be reviewed by the DD Coordinator

according to the DoS.

 The standard tool hydraulics analysis must be performed for the full BHA using the
DrillingXpert™ application by Landmark Software.

 The analysis takes into consideration the bit nozzle sizes, steering head tool orifice size,
operational flow rate and drilling fluid density. Caution by Landmark Software.

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 Hydraulic Analysis

 Review Hydraulic Analysis produced by SE

 Bit TFA
 Orifice Selection
 Advised Mud Weight
 Advised Flow Rates

 Other Considerations
 Pad Differential Pressure
 iCruise Turbine RPM (Flow rate)
 Down Link (Flow rate and Pressure drop below the
PWD).
 Telemetry specifications (Operational flow rate)
 Flow split pads – Recommend is 1.5% for 6 ¾
iCruise but in certain circumstances can go as high
or lower.
 MARSS (Operational Flow rate)

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 Hydraulic Analysis

 Flow split pads

Tool Size Flow split to the pads

4 ¾” iCruise 2.7 %
6 ¾” iCruise 1.5 %
8” and 9 ½” iCruise 0.6 %

There is no specified maximum or minimum bypass

flow to the pads, it is merely a calculated value. In
certain circumstances can go as high or lower.

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 Hydraulic Analysis – PAD Differential

 The flow rate is critical in order to keep the

optimum pad differential pressure within the
operational range, thus generate the required pad
force.
 As mentioned, the actual differential pressure
depends on:
 Flow rate
 Drilling fluid density
 Bit total flow area (TFA)
 Tool orifice size selection
 The higher the pressure on the steering head
pads, the higher the pad force that is generated to
push against the formation and steer the bit
towards target Toolface setting. (But, there is a
limit!)

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 Hydraulic Analysis – DrillingXpert Analysis (Equilibrium Rate x Flow Rate)

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 Hydraulic Analysis – DrillingXpert™ Software
 Upcoming Improvements to DXP (ver. 2.3.4)
 Hydraulics calculations on iCruise tool
performance tab
• Tool restrictor and adjusted flow inputs
• Pad force feeds directly into DDE

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 Hydraulic Analysis – DrillingXpert™ Software

The iCruise sensitivity report generated from DrillingXpert, do not

highlight any values that exceed the tool specifications limits.

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 Hydraulic Analysis – Avoiding an Early Pad Seal Failure
 The example shows how managing
the PWD Diff. Pressure in real-time
resulted in adjusting the flow and
avoiding an early pad seal failure.

 After an increase in the PWD Diff.

Pressure from 705 psi to 1222 psi,
while the maximum expected per the
DoS calculations 983 psi, the flow
was reduced from 250 GPM to 225
GPM reducing the PWD Diff Pressure
to 934 psi.

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 Knowledge Check

What should be the recommended flow rate

range based in the Hydraulic spread sheet?

Always verify the most recent ops guideline revision to

ensure the operational parameters and tools
limitations are inside the operational range.
The iCruise tool still in the improvement/upgrade stage
and there are dynamic changes occurring time to time.
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 Game Plan project

 Game Plan is the strategy plan that is been incorporated in all Sperry operations.

 Under the Game Plan section in the DOS, all the steps regarding to tools setup, operational
parameters, tools inspections/verifications, Inc/Azi/TF Sources recommendations, drilling
procedures and others information will be described step by step how and when should be
executed by the field engineer.

 In this project the instructor will provide the files needed to create a Game Plan:
 Hydraulics analysis
 BHA report
 Well plan (Trajectory)
 iCruise Tool passport
 MagUTM Report

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 Game Plan project

 Game Plan Example:

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 Game Plan project

 In the Game Plan template, provide from the instructor, you will need create the game plan
based in what was covered in each day and submit by email before the next class day.

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 Game Plan project

 Examples of topics those must be included on the game plan:

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 Workbook Exercise / Game Plan project

1. Individually answer the questions in practical 2 of your workbook

2. Update the Game Plan based in the learning content covered in this section.

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 Questions?

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 Pre-job Mobilization
HMS and
Post-Drilling iCruise docs
Procedures

Best practice Tool Theory

Troubleshooting

Pre-Job
Vibration Mobilization

Downlink Analysis Pre-Drill

Procedures

GeoSpan Drilling
Operations

iCruise
CruiseControl

© 2018 Halliburton. All rights reserved.

 Finished

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