Incident details
Operator, cause, commodity and consequences with raw source fields.
GTG incident on 2024-09-07 — TX
Operator
Genesis Offshore Holdings, Llc
Cause
Corrosion Failure
Commodity
Natural Gas
Program
GTG
Damage and Injuries
0 fatalities
0 injuries
Property damage (nominal)
$2,200,000
Incident datetime
2024-09-07 00:00 UTC
Report number
Location
TX
Narrative
During a routine offshore flight patrol, a pipeline technician spotted an area of bubbles in the gom near the hia 582 platform. The bubbles were suspected to be coming from the 30" natural gas pipeline segment 7869. The pipeline was isolated and monitored. No sheen was observed. The leak was reported to the nrc and PHMSA. The vision barge, contracted from chet morrisson, arrived on location. The pipeline lies at a sea depth of 356 feet in conditions of very poor visibility. Saturation divers found the pinhole natural gas leak on the 30" pipeline. The concrete and somastic coating on the pipe were removed and a 30" x 24" plidco clamp was bolted in place over the leak. All ut readings around the clamp and leak area were good. An anode sled was installed on the pipe to support current corrosion mitigation programs. The pipeline was tested up to 900 psi, normal operating pressure, and no leaks were observed by the divers. The pipeline was placed back in service. Supplemental 12/27/2024 corrected question a5 coordinates. Corrected question b13 to "high island south" area. Corrected question b14 to "below water, pipe buried or jetted below seabed." supplemental 01/03/25 corrected question d7.C with estimated cost of emergency response.
Detailed record list
Report Received Date
2024-09-07 00:00:00
Iyear
2024
Report Number
20240106
Supplemental Number
40377
Report Type
Supplemental Final
Operator Id
39352
Name
Genesis Offshore Holdings, Llc
Operator Street Address
811 Louisiana St. Suite 1200
Operator City Name
Houston
Operator State Abbreviation
TX
Operator Postal Code
77002
Time Zone
Central
Daylight Savings Ind
Yes
Location Latitude
27.943439
Location Longitude
-94.389231
Nrc Rpt Num
1407511
Additional Nrc Report Numbers
1407694
Commodity Released Type
Natural Gas
Unintentional Release
490
Intentional Release
610
Accompanying Liquid
0
Fatality Ind
No
Fatal
0
Injury Ind
No
Injure
0
Status When Identified
Normal Operation, Includes Pauses During Maintenance
Shutdown Due Accident Ind
Yes
Communication State Fed Ind
No
Ignite Ind
No
Upstream Action Taken
Valve Closure
Downstream Action Taken
Valve Closure
Num Pub Evacuated
0
On Off Shore
Offshore
Pipe Fac Name
Hios
Segment Name
7869
Off Water Depth
356
Off Accident Origin
On The Outer Continental Shelf (Ocs)
Ocs Type
Ocs-Gulf Of Mexico
Off Ocs Area
High Island South
Off Ocs Block
Hia-582
Off Area Accident Type
Below Water, Pipe Buried Or Jetted Below Seabed
Pipe Facility Type
Interstate
System Part Involved
Offshore Pipeline, Including Riser And Riser Bend
Item Involved
Pipe
Pipe Type
Pipe Body
Pipe Diameter
30
Puddle Weld Ind
No
Pipe Wall Thickness
0.5
Pipe Smys
60000
Pipe Specification
Api 5lx X60
Pipe Seam Type
Dsaw
Pipe Manufacturer
Unknown
Pipe Coating Type
Coal Tar
Coating Applied Ind
No
Installation Year
1994
Manufactured Year
Unknown
Material Involved
Carbon Steel
Release Type
Leak
Leak Type
Pinhole
Class Location Type
Class 1 Location
Could Be Hca
No
Pir Radius
774
Heat Damage Ind
No
Non Heat Damage Ind
No
Did Occur In Mca Ind
No
Est Cost Oper Paid
0
Est Cost Unintentional Release
965
Est Cost Intentional Release
1202
Est Cost Prop Damage
2200000
Est Cost Emergency
10000
Est Cost Other
0
Gas Cost In Mcf
1.97
Prpty
2212167
Num Persons Hosp Not Ovnght
0
Num Injured Treated By Emt
0
Num Resident Building Affctd
0
Num Business Building Affctd
0
Wildlife Impact Ind
No
Accident Psig
940
Gas Flow In Pipe In Mcf
1000
Mop Psig
1440
Mop Cfr Section
192.619(A)(1)
Maop Established Date
1986-12-09 00:00:00
Maop Reversal Flow Ind
No
Accident Pressure
Pressure Did Not Exceed Maop
Pressure Restriction Ind
No
Gas Required Odorized Ind
No
Upstream Valve Type Ind
Manual
Downstream Valve Type Ind
Remotely Controlled
Length Segment Isolated
4470
Internal Inspection Ind
No
Other Restrictions Ind
Yes
Operation Complications Ind
No
Pipeline Function
Offshore Gathering
Scada In Place Ind
Yes
Scada Operating Ind
Yes
Scada Functional Ind
Yes
Scada Detection Ind
No
Scada Conf Ind
Yes
Accident Identifier
Air Patrol
Operator Type
Operator Employee
Investigation Status
No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate)
Investigation Status Details
There was no connection to control room operations.
Employee Drug Test Ind
No
Contractor Drug Test Ind
No
Cause
Corrosion Failure
Cause Details
Internal Corrosion
Internal External
Internal Corrosion
Int Visual Exam Results
Not Cut Open
Int Other Corrosion Ind
Yes
Int Corrosion Type Details
Due To The Location Of The Release Point, Its Orientation On The Pipe (5 O-Clock), Ut Readings, And A "pinhole" Description From The Repair Report, It Is Highly Characteristic Of Localized Internal Corrosion As The Cause.
Int Field Exam Basis Ind
Yes
Int Other Basis Ind
Yes
Int Corrosion Basis Details
Documentation Provided By The Diving Contractor That Performed The Repair Was Utilized To Develop The Probable Cause.
Int Low Point Pipe Loc Ind
Yes
Int Dead Leg Loc Ind
Yes
Corrosion Inhibitors
Yes
Corrosion Lining
No
Cleaning Dewatering
No
Corrosion Coupons
No
Collected Data Ind
No
Has Hydrtst Conduc Before Ind
No
Direct Asmnt Conducted
No
Non Destructive Exam Ind
No
Preparer Name
J**** M*****
Preparer Title
Sr. Pipeline Compliance Specialist
Preparer Email
J***********@g****.com
Preparer Telephone
7137251663
Local Contact Name
N***** G*****
Local Contact Email
N************@g****.com
Authorizer Name
J*** J*****
Authorizer Title
Director Dot Compliance
Authorizer Telephone
7138602605
Authorizer Email
J**********@g****.com
Narrative
During a routine offshore flight patrol, a pipeline technician spotted an area of bubbles in the gom near the hia 582 platform. The bubbles were suspected to be coming from the 30" natural gas pipeline segment 7869. The pipeline was isolated and monitored. No sheen was observed. The leak was reported to the nrc and PHMSA. The vision barge, contracted from chet morrisson, arrived on location. The pipeline lies at a sea depth of 356 feet in conditions of very poor visibility. Saturation divers found the pinhole natural gas leak on the 30" pipeline. The concrete and somastic coating on the pipe were removed and a 30" x 24" plidco clamp was bolted in place over the leak. All ut readings around the clamp and leak area were good. An anode sled was installed on the pipe to support current corrosion mitigation programs. The pipeline was tested up to 900 psi, normal operating pressure, and no leaks were observed by the divers. The pipeline was placed back in service. Supplemental 12/27/2024 corrected question a5 coordinates. Corrected question b13 to "high island south" area. Corrected question b14 to "below water, pipe buried or jetted below seabed." supplemental 01/03/25 corrected question d7.C with estimated cost of emergency response.
| Report Received Date | 2024-09-07 00:00:00 |
|---|---|
| Iyear | 2024 |
| Report Number | 20240106 |
| Supplemental Number | 40377 |
| Report Type | Supplemental Final |
| Operator Id | 39352 PHMSA Enforcement |
| Name | Genesis Offshore Holdings, Llc |
| Operator Street Address | 811 Louisiana St. Suite 1200 |
| Operator City Name | Houston |
| Operator State Abbreviation | TX |
| Operator Postal Code | 77002 |
| Time Zone | Central |
| Daylight Savings Ind | Yes |
| Location Latitude | 27.943439 Google Maps OpenStreetMap |
| Location Longitude | -94.389231 Google Maps OpenStreetMap |
| Nrc Rpt Num | 1407511 NRC Report How to search |
| Additional Nrc Report Numbers | 1407694 |
| Commodity Released Type | Natural Gas |
| Unintentional Release | 490 |
| Intentional Release | 610 |
| Accompanying Liquid | 0 |
| Fatality Ind | No |
| Fatal | 0 |
| Injury Ind | No |
| Injure | 0 |
| Status When Identified | Normal Operation, Includes Pauses During Maintenance |
| Shutdown Due Accident Ind | Yes |
| Communication State Fed Ind | No |
| Ignite Ind | No |
| Upstream Action Taken | Valve Closure |
| Downstream Action Taken | Valve Closure |
| Num Pub Evacuated | 0 |
| On Off Shore | Offshore |
| Pipe Fac Name | Hios |
| Segment Name | 7869 |
| Off Water Depth | 356 |
| Off Accident Origin | On The Outer Continental Shelf (Ocs) |
| Ocs Type | Ocs-Gulf Of Mexico |
| Off Ocs Area | High Island South |
| Off Ocs Block | Hia-582 |
| Off Area Accident Type | Below Water, Pipe Buried Or Jetted Below Seabed |
| Pipe Facility Type | Interstate |
| System Part Involved | Offshore Pipeline, Including Riser And Riser Bend |
| Item Involved | Pipe |
| Pipe Type | Pipe Body |
| Pipe Diameter | 30 |
| Puddle Weld Ind | No |
| Pipe Wall Thickness | 0.5 |
| Pipe Smys | 60000 |
| Pipe Specification | Api 5lx X60 |
| Pipe Seam Type | Dsaw |
| Pipe Manufacturer | Unknown |
| Pipe Coating Type | Coal Tar |
| Coating Applied Ind | No |
| Installation Year | 1994 |
| Manufactured Year | Unknown |
| Material Involved | Carbon Steel |
| Release Type | Leak |
| Leak Type | Pinhole |
| Class Location Type | Class 1 Location |
| Could Be Hca | No |
| Pir Radius | 774 |
| Heat Damage Ind | No |
| Non Heat Damage Ind | No |
| Did Occur In Mca Ind | No |
| Est Cost Oper Paid | 0 |
| Est Cost Unintentional Release | 965 |
| Est Cost Intentional Release | 1202 |
| Est Cost Prop Damage | 2200000 |
| Est Cost Emergency | 10000 |
| Est Cost Other | 0 |
| Gas Cost In Mcf | 1.97 |
| Prpty | 2212167 |
| Num Persons Hosp Not Ovnght | 0 |
| Num Injured Treated By Emt | 0 |
| Num Resident Building Affctd | 0 |
| Num Business Building Affctd | 0 |
| Wildlife Impact Ind | No |
| Accident Psig | 940 |
| Gas Flow In Pipe In Mcf | 1000 |
| Mop Psig | 1440 |
| Mop Cfr Section | 192.619(A)(1) View CFR 49 §192 |
| Maop Established Date | 1986-12-09 00:00:00 |
| Maop Reversal Flow Ind | No |
| Accident Pressure | Pressure Did Not Exceed Maop |
| Pressure Restriction Ind | No |
| Gas Required Odorized Ind | No |
| Upstream Valve Type Ind | Manual |
| Downstream Valve Type Ind | Remotely Controlled |
| Length Segment Isolated | 4470 |
| Internal Inspection Ind | No |
| Other Restrictions Ind | Yes |
| Operation Complications Ind | No |
| Pipeline Function | Offshore Gathering |
| Scada In Place Ind | Yes |
| Scada Operating Ind | Yes |
| Scada Functional Ind | Yes |
| Scada Detection Ind | No |
| Scada Conf Ind | Yes |
| Accident Identifier | Air Patrol |
| Operator Type | Operator Employee |
| Investigation Status | No, the operator did not find that an investigation of the controller(s) actions or control room issues was necessary due to: (provide an explanation for why the operator did not investigate) |
| Investigation Status Details | There was no connection to control room operations. |
| Employee Drug Test Ind | No |
| Contractor Drug Test Ind | No |
| Cause | Corrosion Failure |
| Cause Details | Internal Corrosion |
| Internal External | Internal Corrosion |
| Int Visual Exam Results | Not Cut Open |
| Int Other Corrosion Ind | Yes |
| Int Corrosion Type Details | Due To The Location Of The Release Point, Its Orientation On The Pipe (5 O-Clock), Ut Readings, And A "pinhole" Description From The Repair Report, It Is Highly Characteristic Of Localized Internal Corrosion As The Cause. |
| Int Field Exam Basis Ind | Yes |
| Int Other Basis Ind | Yes |
| Int Corrosion Basis Details | Documentation Provided By The Diving Contractor That Performed The Repair Was Utilized To Develop The Probable Cause. |
| Int Low Point Pipe Loc Ind | Yes |
| Int Dead Leg Loc Ind | Yes |
| Corrosion Inhibitors | Yes |
| Corrosion Lining | No |
| Cleaning Dewatering | No |
| Corrosion Coupons | No |
| Collected Data Ind | No |
| Has Hydrtst Conduc Before Ind | No |
| Direct Asmnt Conducted | No |
| Non Destructive Exam Ind | No |
| Preparer Name | J**** M***** |
| Preparer Title | Sr. Pipeline Compliance Specialist |
| Preparer Email | J***********@g****.com |
| Preparer Telephone | 7137251663 |
| Local Contact Name | N***** G***** |
| Local Contact Email | N************@g****.com |
| Authorizer Name | J*** J***** |
| Authorizer Title | Director Dot Compliance |
| Authorizer Telephone | 7138602605 |
| Authorizer Email | J**********@g****.com |
| Narrative | During a routine offshore flight patrol, a pipeline technician spotted an area of bubbles in the gom near the hia 582 platform. The bubbles were suspected to be coming from the 30" natural gas pipeline segment 7869. The pipeline was isolated and monitored. No sheen was observed. The leak was reported to the nrc and PHMSA. The vision barge, contracted from chet morrisson, arrived on location. The pipeline lies at a sea depth of 356 feet in conditions of very poor visibility. Saturation divers found the pinhole natural gas leak on the 30" pipeline. The concrete and somastic coating on the pipe were removed and a 30" x 24" plidco clamp was bolted in place over the leak. All ut readings around the clamp and leak area were good. An anode sled was installed on the pipe to support current corrosion mitigation programs. The pipeline was tested up to 900 psi, normal operating pressure, and no leaks were observed by the divers. The pipeline was placed back in service. Supplemental 12/27/2024 corrected question a5 coordinates. Corrected question b13 to "high island south" area. Corrected question b14 to "below water, pipe buried or jetted below seabed." supplemental 01/03/25 corrected question d7.C with estimated cost of emergency response. |
External Resources
PHMSA pipeline safety insights.
Product
Features
Company
All rights reserved. Copyright © by ClearPHMSA