INSTRUCTION OF TECHNICAL
REPORT & REGISTER
Doc. Code:
BD-OPS-PRO-I1049/F1
Revision: 01
TECHNICAL REPORT
Report No: (003-2024)
Date: (16/04/2024)
Discipline: (Mechanical)
Regarding to: Lube Oil Pump HT-P-4101A has abnormal signal about vibration and noise.
Date to fix :
Report to:
C/c to:
Inspectors:
16/04/2024
Mechanical Supv
D.OIM
Nguyen Ngoc Giao – Mech Tech
Doan Dinh Hach – Mech Tech
Location:
Reporter:
Ref.:
HT1 PQP cellar deck
Doan Dinh Hach
_______________________________________
No. of page(s) (Including this cover sheet):10
Description of a report
1.
Equipment/system name:
HT-P-4101A: Lube oil pump of HT-K-4100
2.
Status of equipment/system before inspect: (attach evidence, P&ID, etc. if needed for clarity)
Date 26/02/2024, while collect data for all rotating equipment on PQP that running hours over 40.000
hrs, EnI found Motor HT-PM-4101A has abnormal vibration signal.
And then taking ultrasound data for the pump HT-P-4101A has a louder noise than the pump HTP4101B, it is necessary to inspect the condition of Lube oil Pump HT-P-4101A.
Total running hours of HT-P-4101A: 44000 hrs
Page 1 of 9
3.
Steps of inspection:
Step 1
Review running parameter of Lube Oil Pump HT-P-4101A (from 22/01/204 to
14/03/2024)
Collection running data for HT-P-4101A:
Date
Suction pressure/Discharge pressure of HT-P-4101A
22/01/2024
Suction pressure: 3.2 bar
(Pump HTP-4101A
running
when MR4100
running)
Discharge pressure: 5.62 bar
Date
Power and Curent of Motor HT-PM-4101A
22/01/2024
Power: 1.8 KW (Max : 2.2 KW)
(Pump HTP-4101A
running
when MR4100
running)
Current: 3.3 A
Page 2 of 9
Evaluate: Pump work in normal suction and discharge pressure.
Total running hours of HT-P-4101A: 44000 hrs
Step 2
26/02/2024 E&I carryout asset condition monitoring for HT-PM-4101A and
prepare for replace motor follow WO P13452572
Mech collect running paramater for HT-P-4101A as below
26/02/2024
Suction pressure: 5.61 bar
(P-4101A
running by
Force mode,
due to MR4100
stopped)
Discharge pressure: 8.15 bar
26/02/2024
Power: 1.82 KW
(P-4101A
running by
Force mode,
due to MR4100
stopped)
Current: 3.37 A
Page 3 of 9
26/02/2024
Ultrasound for Pump HT-P-4101A: No data
Step 3
09/03/2024 carry out asset condition monitoring for HT-PM-4101A and take ultrasound
for the pump by LongVH.
Date
Record ultralsound for HT-P-4101A and Analysis by By Long VH:
09/03/2024
For MR Lub. Oil pump A (HT-P-4101A): After taking vibration and ultrasound,
evaluate the pump head for signs of damage, suspect the bearing on the DE side.
(EnI not yet
See detail as below:
replace
motor, P4101A
running by
Force mode,
due to MR4100
stopped)
Page 4 of 9
Evaluate: After taking vibration and ultrasound, evaluate the pump head for signs of damage, suspect
the bearing on the DE side.
Step 4
EnI replace new motor, WO P13452572.
12/03/2024
Step 5
Mech visual inspection pump:
12/03/2024
Disconnect
motor and
pump
adapter
12/03/2024
Visual
check
coupling
alignment
Page 5 of 9
12/03/2024
Visual
check DE
bearing
(outside
position)
Visual check bearing found the bearing locking device has loosen and the inner bearing
has light scratches, may cause Bearing and rotor shaft start to down grade.
Step 6
After EnI install the new motor, run test the pump in force mode and collect
parameter data.
14/03/2024
Suction pressure: 5.44 bar
(after EnI
replace new
motor, P4101A
running by
Force mode,
due to MR4100
stopped)
Discharge pressure: 8 bar
Page 6 of 9
14/03/2024
Power: 1.88 KW
(P-4101A
running by
Force mode,
due to MR4100
stopped)
Current: 4.09 A
Ultrasound data of Pump HT-P-4101A
14/03/2024
HT-P4101A
running by
Force mode,
due to MR4100
stopped)
For MR Lub. Oil pump A (HT-P-4101A): after EnI replaced the motor, the pump run
test and investigated with Mr. LongVH, evaluate the pump head for signs of damage,
suspecting the DE side bearings. EnI team has replaced the spare motor, signs of
ultrasound impact still appear on the pump.
See detail as below:
Picture 3: Time waveform
Page 7 of 9
Picture 4:FFT spectrum shows peak at 31.6 Hz at Pump Casing
6/04/2024
16/04/2024
Install new pump , old pump transfer to Mech WS
Old pump was dismantle in Mech WS, found defect on pump shaft at DE bearing
position
Evaluate: the old pump head of HT-P-4101A was defected shaft at DE bearing position
4. Status of equipment/system after inspected, finding: (attach evidence, P&ID, etc. if needed for
clarity)
Install new pump for using.
Old pump was defected shaft at DE bearing position, will send onshore to repair for back up
5. Root cause: (if found)
Direct root cause: Old pump was defected shaft at DE bearing position.
6. Recommendation:
- Send old pump to onshore to repair by chopper 17/4/2024.
- .
-
Disposal part: N/A
Disposal located: N/A
Useable spare part: Old pump will send to shore for refurbish and then replace for oil pump B (HT-P41010B). After that refurbish the old pump and spare for HT-P-4101A/B
Useable located at: WH onshore.
Page 8 of 9
Serial Number on Pump’s body:
Name
Nguyen Ngoc Giao
Position
Mechtech
Doan Dinh Hach
Mechtech
Reviewed by
Nguyen Hung Thanh
Mech Sup
Reviewed by
Hoàng Văn Tuấn
DOIM
Approved by
Đoàn Mai Lâm
OIM
Reported by
Signature
--------------------END OF REPORT--------------------
Page 9 of 9