Pulse Generator Assembly Introduction. LWD 1

1.

Pulse Generator Assembly
Objectives
At the completion of this presentation you should be able to:
LWD 1
1.
Describe the functions of the pulse generator assembly.
2.
Name the parts required to build the pulse generator assembly.
3.
Describe the main difference in the assembly of the 1200/650 systems
versus the Slimhole/Superslim systems.
Pulse Generator Assembly
Introduction
January 12, 2001
© 2001, Halliburton Energy Services, Inc.
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This is a Pulse Generator
Assembly
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What does a Pulse
Generator Assembly do?
• A mechanical assembly that
uses the drilling fluid flow
through the drillpipe to generate
both electrical and hydraulic
power and also to create
pressure changes, or pulses, in
that fluid.
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What makes a Pulse
Generator Assembly
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What makes a Pulse
Generator Assembly
• The Pulser
• The Flowgear (the parts that are
installed on the pulser to build a
turbine, valve, and to resist
erosion)
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• The Pulser
– The central component of all four
systems
– The same pulser can be used on all four
systems
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2.

The Pulser
The Pulser
– Generates electrical and hydraulic
power
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The Flowgear
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The Flowgear
– Most of the flowgear comes in four
sizes, related to the flow rate, and is
used on one of the four systems.
• 1200 System
• 650 System
• Slimhole System
• Superslim System
– Some of the flowgear is common to two
or more systems
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January 12, 2001
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Pulse Generator Assembly
Pulse Generator Assembly
• The four systems can be divided
into two groups that have similar
assembly procedures
• 1200 and 650 Systems
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– 1200 and 650 Systems
– Slimhole and Superslim Systems
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2

3.

1200 and 650 Systems
1200 and 650 Systems
• The Impeller Assembly
• The Mid Vane Impeller Assembly
– Rotates due to mud flow
– Magnetically coupled to pulser’s main
shaft
– Vane angle related to flow rate
Standard Impeller
• 1200 System - 43°, 35°, 28° vane angles
• 650 System - 35° vane angle
Mid Vane Impeller
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1200 and 650 Systems
– Two marine bearings
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1200 and 650 Systems
Mid Vane Impeller
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Mid Vane Impeller
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1200 and 650 Systems
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1200 and 650 Systems
• The Upper Bearing Sleeve
• The Upper Bearing Sleeve
– Supports the impeller’s upper bearing
– Threaded onto the stator support tube
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4.

1200 and 650 Systems
1200 and 650 Systems
• The Flow Diverter
• The Flow Diverter
– Protects impeller from erosion
– Installed between the upper bearing
sleeve and the stator support tube
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1200 and 650 Systems
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1200 and 650 Systems
• The Stator Support Tube
• The Stator Support Tube
– Screwed onto the pulser intermediate
case (3 screws)
– Supports following components
• Shrouded Stator (slide on)
• Hub (slide on)
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January 12, 2001
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1200 and 650 Systems
1200 and 650 Systems
• Stator Support Tube Assembly
• Stator Support Tube Assembly
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5.

1200 and 650 Systems
1200 and 650 Systems
Stator Support
Tube Assembly
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Stator Support
Tube Assembly
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1200 and 650 Systems
1200 and 650 Systems
• Stator Support Tube Screws
• Stator Support Tube Screws
– Holds stator support tube in-place
– Install flat-head screw first
• Locates stator support tube in correct
position
• Aligns the remaining two screw holes
– Install two button-head screws
Button-head screws
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Flat-head screw
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1200 and 650 Systems
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1200 and 650 Systems
Flat-head screw
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Flat-head screw
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6.

1200 and 650 Systems
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1200 and 650 Systems
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1200 and 650 Systems
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1200 and 650 Systems
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1200 and 650 Systems
Button-head screws
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Button-head screws
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1200 and 650 Systems
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7.

1200 and 650 Systems
1200 and 650 Systems
• The Shrouded Stator
• The Shrouded Stator
– Slides over key on stator support tube
– Angled vanes deflect fluid flow
– Different vane exit angles dependent
on flow rate
– Shroud centralizes assembly when
installed
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1200 and 650 Systems
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1200 and 650 Systems
Shrouded Stator
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Shrouded Stator
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1200 and 650 Systems
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1200 and 650 Systems
• The Hub
• The Hub
– Slides over key on stator support tube
– Provides a location to place a back-up
wrench when tightening some parts
– Prevents erosion of the pulser
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8.

1200 and 650 Systems
1200 and 650 Systems
Hub
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Hub
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1200 and 650 Systems
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1200 and 650 Systems
• The Nose Cap
• The Nose Cap
– Threads onto stator support tube
– Resists erosion from fluid flow
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1200 and 650 Systems
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1200 and 650 Systems
Nose Cap
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Nose Cap
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9.

1200 and 650 Systems
1200 and 650 Systems
• The Poppet
• The Poppet
– Threads onto poppet shaft
– Cause fluid flow restriction when
extended into the orifice
– Resists erosion from fluid flow
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1200 and 650 Systems
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1200 and 650 Systems
Poppet
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Poppet
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1200 and 650 Systems
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1200 and 650 Systems
• The Key
• The Key
– Prevents pulser from rotating
– Maintains highside alignment
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10.

1200 and 650 Systems
1200 and 650 Systems
Key
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Key
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1200 and 650 Systems
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1200 and 650 Systems
• The Flow Ring/Straightener
• The Flow Ring/Straightener
– Slides over key on pulser
– Vanes resist rotational fluid flow exiting
the impeller
– Outer ring centralizes assembly when
installed
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January 12, 2001
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1200 and 650 Systems
1200 and 650 Systems
Flow Ring/
Straightener
Flow Ring/
Straightener
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11.

1200 and 650 Systems
1200 and 650 Systems
• The Snap Ring
• The Snap Ring
– Holds spacer sleeve in place during
assembly
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1200 and 650 Systems
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1200 and 650 Systems
Snap Ring
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Snap Ring
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1200 and 650 Systems
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1200 and 650 Systems
• The Spacer Sleeve
• The Spacer Sleeve
– Resists erosion from fluid flow
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12.

1200 and 650 Systems
1200 and 650 Systems
Spacer Sleeve
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Spacer Sleeve
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1200 and 650 Systems
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Pulse Generator Assembly
• Pulse Generator Assembly
January 12, 2001
January 12, 2001
• Slimhole and Superslim
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Slimhole and Superslim
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Slimhole and Superslim
• The Impeller Assembly
• The Impeller Assembly
– Rotates due to mud flow
– Magnetically coupled to pulser’s main
shaft.
– Vane angle related to flow rate
Superslim Impeller
• Slimhole System - 35°, 30° vane angles
Slimhole
Mid Vane Impeller
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• Superslim System 45° vane angle
– Two marine bearings
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13.

Slimhole and Superslim
Slimhole and Superslim
Impeller
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Impeller
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Slimhole and Superslim
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Slimhole and Superslim
• The Upper Bearing Sleeve
• The Upper Bearing Sleeve
– Supports the impeller’s upper bearing
– Threaded onto the stator support tube
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Slimhole and Superslim
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Slimhole and Superslim
• The Shrouded Stator
• The Shrouded Stator
– Pinned onto the pulser intermediate
case
– Angled vanes deflect fluid flow
– Different vane exit angles dependent
on flow rate
– Shroud centralizes assembly when
installed
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January 12, 2001
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14.

Slimhole and Superslim
Slimhole and Superslim
• The Shrouded Stator Assembly
• The Shrouded Stator Assembly
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Slimhole and Superslim
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Slimhole and Superslim
Shrouded Stator
Assembly
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Shrouded Stator
Assembly
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Slimhole and Superslim
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Slimhole and Superslim
• The Pin
• The Pin
– Fits in pin hole on the pulser
intermediate case
– Prevents the shrouded stator from
rotating on the pulser
– Holds shrouded stator and nose cap
(shroud/nose cap-Superslim) on pulser
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15.

Slimhole and Superslim
Slimhole and Superslim
Pin
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Pin
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Slimhole and Superslim
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Slimhole and Superslim
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Slimhole and Superslim
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Slimhole and Superslim
• The Split Retainer Ring
• The Split Retainer Ring
– Fits in ring groove on the pulser
intermediate case
– Holds shrouded stator and nose cap
(shroud/nose cap-Superslim) on pulser
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16.

Slimhole and Superslim
Slimhole and Superslim
Split Retainer Ring
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Split Retainer Ring
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Slimhole and Superslim
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Slimhole and Superslim
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Slimhole and Superslim
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Slimhole and Superslim
• The Shroud/Nose Cap
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17.

Slimhole and Superslim
Slimhole and Superslim
• The Shroud/Nose Cap
– Threads onto shrouded stator
– Holds split retainer ring and pin in place
– Resists erosion from fluid flow
Shroud/Nose Cap
Assembly
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Slimhole and Superslim
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Slimhole and Superslim
• The N6 Poppet
Shroud/Nose Cap
Assembly
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Slimhole and Superslim
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Slimhole and Superslim
Use the N6 poppet
with a dovetail
orifice
• The Poppet
– Threads onto poppet shaft
– Cause fluid flow restriction when
extended into the orifice
– Resists erosion from fluid flow
N6 Poppet
LW15 Poppet
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January 12, 2001
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18.

Slimhole and Superslim
Slimhole and Superslim
Poppet
January 12, 2001
Poppet
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Slimhole and Superslim
January 12, 2001
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Slimhole and Superslim
• The Key
• The Key
– Prevents pulser from rotating
– Maintains highside alignment
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Slimhole and Superslim
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Slimhole and Superslim
Key
January 12, 2001
January 12, 2001
Key
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19.

Slimhole and Superslim
Slimhole and Superslim
• The Flow Ring/Straightener
• The Flow Ring/Straightener
– Slides over key on pulser
– Vanes resist rotational fluid flow exiting
the impeller
– Outer ring centralizes assembly when
installed
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Slimhole and Superslim
January 12, 2001
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Slimhole and Superslim
Flow Ring/Straightener
January 12, 2001
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Flow Ring/Straightener
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Slimhole and Superslim
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Slimhole and Superslim
• The Spacer Sleeve
• The Spacer Sleeve
– Resists erosion from fluid flow
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20.

Slimhole and Superslim
Slimhole and Superslim
Spacer Sleeve
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Spacer Sleeve
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Slimhole and Superslim
• Pulse Generator Assembly
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