01- System Overview Rev A

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
LWD System Overview Objectives
At the completion of this presentation you should be able to:
1. List the five component parts of an LWD system.
2. Name the current surface computer and list one advantage over a previous surface computer.
3. Describe the functions of a bus master.
4. Name the two current directional probes.
5. Identify the primary measurement of each sensor.
7. Describe the difference between the negative and positive pulser valves.

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
LWD System Overview
How do we categorize our systems?
Type of pulser?
Positive pulse
Negative pulse
Positive
Negative

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
LWD System Overview
How do we categorize our systems?
Data encoding scheme?
Pulse Position Modulation
Manchester

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
LWD System Overview
How do we categorize our systems?
Pulse Position Modulation
Irregular time between pulses
Intermittent pulses
Standpipe
Pressure
Time

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
LWD System Overview
How do we categorize our systems?
Manchester
Regular time between pulses
Continuous pulses
Standpipe
Pressure
Time

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
LWD System Overview
How do we categorize our systems?
Design of tools?
Sonde based
Insert based
Insert
Sonde
Electronics
Mud Flow
Electronics
Mud Flow

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
The LWD System
The five components of an LWD System:
Surface Computer
Downhole Computer - Bus Master
Directional Sensors
Formation Evaluation Sensors
Pulser

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Surface Computer
INSITE
Continuing development
Windows NT soon Windows 2000
Supports MWD, LWD, SDL and more
Support for other Product Service Lines

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Surface Computer
ISC
Development finished
DOS based
Supports MWD, LWD
Negative Pulse PPM and Positive Pulse Manchester

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Surface Computer
ADAC and Data Handler
Development finished
DOS based
Supports LWD
Negative Pulse PPM

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Surface Computer
MSC
Development finished
Unix based
Supports Directional Only and Gamma
Positive Pulse Manchester

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Surface Computer
PCDWD
DOS based
Supports Directional Only and Gamma
Positive Pulse Manchester

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Surface Computer
MPSR
Development finished
Introduced in Mid 80’s
Supports Directional Only
Positive Pulse Manchester

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Downhole Computer
Bus Master
What is a Bus Master?
Controls other sensors
Stores data
Prepares data for transmission

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Downhole Computer
Bus Master
Six current tools can act as a Bus Master
CIM Central Interface Module
HCIM H is the type of processor
TM Telemetry Module
PCD Pressure Case Directional
PCG Pressure Case Gamma
SP4 Slim Phase 4

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Pulsers
Negative Pulse
Vents mud to the annulus
Decreases internal drillpipe pressure
Same pulser valve in 6 3/4", 8", 9 1/2" collars
Different insert for
9 1/2" pulser

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Pulsers
Positive Pulse
Causes a restriction to mud flow
Increases internal drillpipe pressure
Same pulser in
3 1/2" to 10" collars
Flow gear in 4 flow rate ranges

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Directional Sensors
Six directional sensors
Sonde based
Two current sensors
Positive Pulse
PCD Pressure Case Directional
Positive and Negative Pulse
DM Directional Module

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Directional Sensors
Five directional sensors
Sonde Based
Three no longer built, but still used
Positive Pulse
DEP Directional Electronic Probe
DEP II Directional Electronic Probe II
Negative Pulse
PM Position Monitor

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Formation Evaluation Sensors
Sonde Based
Gamma
GM Gamma Module
PCG Pressure Case Gamma

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Formation Evaluation Sensors
Insert Based
Gamma
DGR Dual Gamma Ray

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Formation Evaluation Sensors
Insert Based
Resistivity
Electromagnetic Wave Resistivity
EWR-S Shielded
EWR-P4 Phase 4
EWR-P4D Phase 4 Deep
SP4 Slim Phase 4

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Formation Evaluation Sensors
Insert Based
Other sensors
Porosity
BAT – Bi-modal AcousTic
CNØ – Compensated Neutron Porosity
CTN – Compensated Thermal Neutron
Porosity
MRIL-WD – Magnetic Resonance Imaging Logging While Drilling

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Formation Evaluation Sensors
Insert Based
Other sensors
Density
SLD – Stabilized LithoDensity
ALD – Azimuthal LithoDensity
Caliper
ACAL – AcoustiCaliper
Formation Pressure
GeoTap LWD Formation Tester

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Formation Evaluation Sensors
Insert Based
Other sensors
Drilling Efficiency
WOB/TOB – Weight on Bit/Torque on Bit
PWD – Pressure-While-Drilling
DDS – Drillstring Dynamics Sensor
(Vibration)

© 2003, Halliburton Energy Services, Inc.
July 2, 2003
Acronyms
3-1/8 in. EWR-Phase 4 – Electromagnetic Wave Resistivity Phase 4
ABI – At Bit Inclination
ACAL – AcoustiCaliper
ALD – Azimuthal LithoDensity
BAT – Bi-modal AcousTic
CNØ – Compensated Neutron Porosity
CTN – Compensated Thermal Neutron Porosity
DC – Driver Controller
DDS – Drillstring Dynamics Sensor
DEP II – Directional Electronic Probe II
DEP – Directional Electronic Probe
DGR – Dual Gamma Ray
DM – Directional Module
EWR-Phase 4 – Electromagnetic Wave Resistivity Phase 4
EWR-Phase 4D – Electromagnetic Wave Resistivity Phase 4 Deep
EWR-S – Electromagnetic Wave Resistivity Shielded