The Pulser and How to Test it. LWD 1

1. LWD 1

The Pulser and How to Test
it
January 31, 2001
© 2001, Halliburton Energy Services, Inc.
1

2. Pulser Testing Objectives

At the completion of this presentation you should be able to:
1. Describe the important differences between the MK VI, VII, & VIII pulsers.
2. You will be able to test the pulser and determine whether it should be
used.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
2

3. The Pulser

• The central component of all four
systems
• The same pulser can be used on
all four systems
• There are three current versions
of the pulser
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
3

4. The Pulser

– Generates electrical and hydraulic
power
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
4

5. Pulser’s Hydraulic Power

• Operates a poppet/orifice valve
that intermittently restricts the
fluid flow, producing a pressure
increase, or pulse. These pulses
are detected on the surface.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
5

6. Pulser’s Hydraulic System

Piston
Bypass Port
High Pressure
Fluid
Piston
Pump
Flow
Restrictor
Valve
Bypass Port
Port Seal
Main Valve
Control Valve
Low Pressure
Fluid
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
6

7. Pulser’s Hydraulic System

• Control valve open
– Flow through control valve
• Allows flow through main valve
– Flow through main
• Pressure drop across flow restrictor
moves port seal down against spring
• Valve bypass port opens
– Poppet fully retracted
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
7

8. Pulser’s Hydraulic System

• Control valve closed
– No flow through control valve
• Stops flow through main valve
– No flow through main valve
• Spring moves port seal up
• Valve bypass port closes
• Piston moves up
– Poppet partially extended
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
8

9. Pulser’s Hydraulic System

• Control valve closed
– No flow through control valve
• Stops flow through main valve
– No flow through main valve
• Spring moves port seal up
• Valve bypass port closes
• Piston moves up
• Piston bypass port opens
– Poppet fully extended
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
9

10. Pulser’s Hydraulic System

January 31,
2001
© 2001, Halliburton Energy Services, Inc.
10

11. Pulser’s Hydraulic System

• The control valve is operated by
a signal from the telemetry
controller. Closing the control
valve causes the poppet to
extend into the orifice.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
11

12. Pulser’s Electrical Power

• Generator consists of six fixed
coils and eight rotating magnets.
• Electrical power is supplied to
the sondes attached to the
pulser.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
12

13. The Parts of a Pulser

Pump outer case
2 inch case
Poppet shaft
Bulkhead
Intermediate case
Poppet shaft
housing
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
13

14. Booted Vs. Bootless Pulser

Boot
January 31,
2001
Bootless
© 2001, Halliburton Energy Services, Inc.
14

15. Booted Vs. Bootless Pulser

• Boot
– Gas permeable
– Susceptible to damage
– No moving parts
– Transmits external pressure to pulser’s
internal fluid
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
15

16. Booted Vs. Bootless Pulser

• Bootless
– Increased reliability
– Requires seal pack assembly change
every 100 or 200 hours depending on
temperature
– Moving parts
– Transmits external pressure to pulser’s
internal fluid
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
16

17. Pulser Connections

7-pin Amphenol
Connector
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
4 Cond. Rotational
Connector
17

18. Pulser Connection

• 7-pin Amphenol
– Used for DWD
– Careful assembly required to avoid
damage
– Uses coil cord
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
18

19. Pulser Connection

• 4-Conductor Rotational
Connector
– Used for Solar
– Easy to make-up connection
– Increased reliability
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
19

20. The Four Current Pulsers

• Mark 6 DWD
• Mark 7 Solar
• Mark 8 Solar
• Mark 8 DWD
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
20

21. Mark 6 DWD

• 7-Pin Amphenol Connector
• Maximum Temperature 175 C
• Full Stroke (0.374 in.)
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
21

22. Mark 7 Solar

• 4-Conductor Rotational
Connector
• Maximum Temperature 200 C
• Full Stroke (0.374 in.)
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
22

23. Mark 8 Solar

• 4-Conductor Rotational
Connector
• Maximum Temperature 200 C
• Half Stroke (0.187 in.)
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
23

24. Mark 8 DWD

• 7-Pin Amphenol Connector
• Maximum Temperature 175 C
• Half Stroke (0.187 in.)
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
24

25. How to Identify Pulsers

• Mark 6 DWD
– 7-pin amphenol connector
– Lower filling screw NOT marked 8
– Poppet extends 9.5 mm (0.374 in.)
• Mark 7 Solar
– Rotational connector
– Lower filling screw NOT marked 8
– Poppet extends 9.5 mm (0.374 in.)
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
25

26. How to Identify Pulsers

Lower Filling Screw
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
26

27. How to Identify Pulsers

• Mark 8 Solar
– Rotational connector
– Lower filling screw MAY BE marked 8
– Poppet extends 4.8 mm (0.187 in.)
• Mark 8 DWD
– 7-pin amphenol connector
– Lower filling screw MAY BE marked 8
– Poppet extends 4.8 mm (0.187 in.)
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
27

28. Testing the Pulser

• Two tests
– Resistance
• Tests electrical resistance of the generator
coils and control valve solenoid
– Extension/retraction
• Tests hydraulic system
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
28

29. Pulser Test Equipment

• DWD Electronic Test Kit
• MWD Pulser Test Set and Leads
• Digital Multi-meter
• Coil Cord Pulser to MEP
• Pulser Ground Lead
• BNC Female/Banana Connector (2)
• BNC Cable (36 inch)
• Poppet Retraction Tool
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
29

30. Additional Test Equipment for Solar Pulsers

• Solar 175 Test Cable Amphenol/9-pin
• 4-pin Male Rotational Test Connector
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
30

31. MWD Pulser Test Set

9V Switch
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
31

32. Digital Multi-meter

January 31,
2001
© 2001, Halliburton Energy Services, Inc.
32

33. Coil Cord

7-Pin Female
Amphenol Connector
January 31,
2001
7-Pin Female
Amphenol Connector
© 2001, Halliburton Energy Services, Inc.
33

34. Coil Cord

A
B
C
Pulser
D
E
F
G
January 31,
2001
A
B
C
Probe
D
E
F
G
© 2001, Halliburton Energy Services, Inc.
34

35. Pulser Resistance Test Equipment

BNC/Banana adapter
Pulser Ground Lead
BNC cable (36 inch)
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
35

36. Pulser Extension Test Equipment

Poppet retraction Tool
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
36

37. Pulser Resistance Test Equipment

Solar 175 Test Cable
Amphenol/7-pin
4-pin Male Rotational
Test Connector
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
37

38. Pulser Resistance Test Purpose

• Tests the pulser generator coils
for shorts and open circuits
• Tests the pulser control valve
solenoid for shorts and open
circuits
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
38

39. Pulser Resistance Test Procedure

• Set the 9v switch on the MWD
Pulser Test Set to off
• Set the meter to measure
resistance and ensure that the
scale selected is appropriate for
the resistance expected.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
39

40. Pulser Case Lead Continuity

•Measure the
pulser case lead
resistance
• A reading of 0-1
ohms indicates
continuity.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
40

41. Pulser Resistance Test Procedure

Connect the meter
to the ohms out
ports on the test
set using the BNC
cable and
adapters.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
41

42. Pulser Resistance Test Procedure

Connect the
pulser case lead
to the case port
on the test set and
to the pulser with
the alligator clip.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
42

43. Pulser Resistance Test Procedure

Connect the coil
cord from the
pulser to the
pulser port on the
test set.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
43

44. Pulser Resistance Test Procedure

• Check resistance readings by
rotating switches S1 and S2
through all positions shown on
the Pulser Test Form.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
44

45. DWD Pulser Resistances

Switch S 1
DWD Pulser Resistances
A
B
C
D
E
F
G
Case
Switch S2
A
B
C
D
E
0-1 340-608 >100k >100k >100k
0-1
>100k >100k >100k
0-1
9-11k 9-11k
0-1
0-1
0-1
F
G
Inf >100k
Inf >100k
Inf 9-11k
Inf
0-1
Inf
0-1
0-1
Inf
0-1
>100k >100k >100k Inf >100k
A = Solenoid, B = Ground, C = Generator A, D = Generator B,
E = Generator C, F = Not used, G = Jumped to E in coil cord
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
45

46. Solar Pulser Resistances

Switch S1
Solar Pulser Resistances
January 31,
2001
A
0-1
Switch S2
B
C
D
340-608
Inf
Inf
0-1
Inf
Inf
0-1
15-26
0-1
E
Inf
A
Inf
B
15-26
C
15-26
D
0-1
E
A = Solenoid, B = Ground, C = Generator A,
D = Generator B, E = Generator C
© 2001, Halliburton Energy Services, Inc.
46

47. Pulser Resistance Test Procedure

A to A
January 31,
2001
A to B
A to C
© 2001, Halliburton Energy Services, Inc.
A to F
47

48. Pulser Resistance Test Procedure

• If any readings are out of
specification, check the coil cord
and the pulser test set and
isolate the defective part.
• Then complete a Failure Report.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
48

49. Pulser Resistance Test Procedure

What was all that
about?
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
49

50. Pulser Extension/Retraction Test Purpose

• Basic test of the hydraulic
system
• Tests the seals on the main
valve, control valve, the pump
rams’ seals, and the piston seal
• Tests function of both the main
and control valves
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
50

51. Pulser Extension/Retraction Test Procedure

• Clean the pulser; pay particular
attention to the three threaded
location holes on the pump
housing.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
51

52. Pulser Extension/Retraction Test Procedure

Install an impeller
assembly over the
intermediate case.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
52

53. Pulser Extension/Retraction Test Procedure

Prepare the
poppet retraction
tool by screwing
the adjuster nut
fully onto the shaft
Adjuster Nut
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
53

54. Pulser Extension/Retraction Test Procedure

Slide the
retraction tool
over the poppet
end of the pulser.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
54

55. Pulser Extension/Retraction Test Procedure

Insert the locating
screws into the
threaded holes on
the pulser and
hand tighten.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
55

56. Pulser Extension/Retraction Test Procedure

Screw the adjuster
nut against the
poppet shaft until
the first groove on
the retraction
tool’s shaft is
aligned with the
face of the locking
ring.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
56

57. Pulser Extension/Retraction Test Procedure

Connect the
pulser to the
poppet extend
socket on the
MWD Pulser Test
Set using the coil
cord
Turn on the 9v
switch.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
57

58. Pulser Extension/Retraction Test Procedure

Rotate the
impeller assembly.
The retraction
tool’s shaft should
extend to reveal
the second groove
on the shaft.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
58

59. Pulser Extension/Retraction Test Procedure

• Monitor the extension; the
retraction tool’s shaft must
remain extended for 2 minutes
without bleeding off and
retracting all the way to the first
groove.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
59

60. Pulser Extension/Retraction Test Procedure

Rotate the
impeller assembly
until the retraction
tool’s shaft again
extends to reveal
the second groove
on the shaft.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
60

61. Pulser Extension/Retraction Test Procedure

• Turn off the 9v switch.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
61

62. Pulser Extension/Retraction Test Procedure

• Monitor retraction
– For a Booted Pulser
• The retraction tool’s shaft should retract to
the first groove in less than 2 seconds.
– For a Bootless Pulser
• The retraction tool’s shaft should retract to
the first groove in about 8 seconds.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
62

63. Pulser Extension/Retraction Test Procedure

• Record the results on the Pulser
Test Sheet.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
63

64. Pulser Extension/Retraction Test Procedure

• Should the pulser fail to meet the
above procedure, return pulser
for R&M, stating “Retraction
Fault”.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
64

65. Pulser Extension/Retraction Test Procedure

What was all that
about?
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
65

66. Testing an MWD Pulser Test Set

• Test S1 and S2 Switches
• Test Ohms Out and Case Ports
• Test Pulser Connector
• Test Poppet Extend Connector
• Test Internal Batteries
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
66

67. Test S1 and S2 Switches

Set the volt/ohm
meter to ohms
Connect the test
leads to the black
and white ohms
out ports.
A to A
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
67

68. Test S1 and S2 Switches

• Check resistance readings by
rotating switches S1 and S2
through all positions on Table 1
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
68

69. Test S1 and S2 Switches Table 1

Switch S1
Test S1 and S2 Switches
Table 1
January 31,
2001
A
B
C
D
E
F
G
A
B
0-1
Inf
0-1
Switch S2
C
D
E
Inf
Inf
0-1
Inf
Inf
Inf
0-1
© 2001, Halliburton Energy Services, Inc.
Inf
Inf
Inf
Inf
0-1
F
G
Inf
Inf
Inf
Inf
Inf
0-1
Inf
Inf
Inf
Inf
Inf
Inf
0-1
69

70. Test S1 and S2 Switches

A to B
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
70

71. Test S1 and S2 Switches

G to G
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
71

72. Test Ohms Out & Case Ports

Test Ohms Out & Case
Ports
Connect the test
leads to the white
ohms out port and
the black case
port.
S2 A
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
72

73. Test Ohms Out & Case Ports

Test Ohms Out & Case
Ports
Rotate switch S2
through positions
A to G.
All positions
should read
infinity.
S2 G
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
73

74. Test Ohms Out & Case Ports

Test Ohms Out & Case
Ports
Connect the test
leads to the black
ohms out port and
the black case
port.
S1 A
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
74

75. Test Ohms Out & Case Ports

Test Ohms Out & Case
Ports
Rotate switch S1
through positions
A to G.
All positions
should read
infinity.
S1 G
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
75

76. Test Ohms Out & Case Ports

Test Ohms Out & Case
Ports
•Move switch S1
to the case
position.
•The meter should
read 0-1 ohms.
S1 Case
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
76

77. Test Pulser Connector

•Connect the test
leads to the black
ohms out port and
pin A inside the
pulser connector
on the test set.
Pin A
S1 A
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
77

78. Test Pulser Connector

Rotate switch S1
through positions
A to case. The
meter should read
infinity in all
positions except
A, which should
read 0-1 ohms.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
Pin A
S1 Case
78

79. Test Pulser Connector

• Repeat this for pins B through G
on the pulser connector for all
positions shown on Table 2
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
79

80. Test Pulser Connector Table 2

Test Set Pulser
Connector
Test Pulser Connector
Table 2
January 31,
2001
A
B
C
D
E
F
G
A
B
0-1
Inf
0-1
Switch S1 or S2
C D
E
F
Inf
Inf
0-1
Inf
Inf
Inf
0-1
Inf
Inf
Inf
Inf
0-1
© 2001, Halliburton Energy Services, Inc.
Inf
Inf
Inf
Inf
Inf
0-1
G
Case
Inf
Inf
Inf
Inf
Inf
Inf
0-1
Inf
Inf
Inf
Inf
Inf
Inf
Inf
80

81. Test Pulser Connector

•Connect the test
leads to the white
ohms out port and
pin A inside the
pulser connector.
Pin A
S2 A
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
81

82. Test Pulser Connector

•Rotate switch S2
through positions
A to G. The meter
should read
infinity in all
positions except
A, which should
read 0-1 ohms.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
Pin A
S2 G
82

83. Test Pulser Connector

• Repeat this for pins B through G
on the pulser connector for all
positions shown on on Table 2
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
83

84. Test Poppet Extend Connector

• Ensure that the 9v switch is off.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
84

85. Test Poppet Extend Connector

•Place one test
lead in the white
battery check port
and touch the
other lead to each
pin inside the
poppet extend
connector.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
Pin A
85

86. Test Poppet Extend Connector

•Each pin should
read infinity
except pin A
which should read
0-1 ohms.
Pin B
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
86

87. Test Poppet Extend Connector

• Remove the test lead from the
white battery check port and
place it in the black battery
check port.
• Touch the other lead to each pin
inside the poppet extend
connector.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
87

88. Test Poppet Extend Connector

Pin A
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
88

89. Test Poppet Extend Connector

Pin B
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
89

90. Test Poppet Extend Connector

• Each pin should read infinity
except pin B which should read
0-1 ohms.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
90

91. Test Internal Batteries

• Set the meter to the DC voltage
range to test the eight 1.5 volt AA
battery cells (12 volts).
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
91

92. Test Internal Batteries

•Connect the test
leads to the
battery check
ports. Black is
negative, white is
positive.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
92

93. Test Internal Batteries

•Check the internal
battery voltage by
switching the 9v
switch on.
•The meter should
read greater than 10
volts.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
93

94. Test Internal Batteries

• Turn the 9v switch off and
remove the meter leads from the
battery check ports.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
94

95. Replace Internal Batteries

• If the voltage is lower than 10
volts, open the test set and
replace the eight 1.5 volt battery
cells.
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
95

96. Replace Internal Batteries

8 AA 1.5V Cells
January 31,
2001
© 2001, Halliburton Energy Services, Inc.
96