Offshore Pipelines Emergency Repair Capability Enhancement Diverless Services : (2014- 17) Rakesh Kumar Sr Pipeline Engineer
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Offshore Pipelines Emergency Repair Capability Enhancement
Diverless Services : (2014-17)
Rakesh KumarSr Pipeline Engineer
14” – 4 numbers30” – 3 numbers4” – 1 number
Pipeline Inventory in SEIC
Pipeline Failure - Offshore
Leak Rupture
Fix Hydro Clamp Section replacement-connectors
Diving Spread >10mtShallow Barge 1-10mt
No Resources during Ice Condition – Dec to May
Ice Class Vessel, Work Class ROV, Diverless Equipments
Current strategy
Currently available OIL States Equipments-Diver assisted
Leak ClampConnector
MAF
Emergency pipes stocked in Kholmsk (fully refurbished)
Stored in Kholmsk
Offshore Pipeline Emergency Documents
1 5600-Z-90-04-P-0017-00 Rev 02 Pipelines Emergency Response Plan (PA-A to Chaivo)2 5600-Z-90-04-P-0016-00 Rev 02 Pipelines Emergency Response Plan (PA-B to Chaivo)
3 5600-Z-90-04-P-0018-00 Rev 02 Pipelines Emergency Response Plan (LUN-A to OPF)4 2000-S-00-N-P-3272-00 Rev 06 PA-A Emergency Response Procedure5 4000-S-90-04-P-0007-00 Rev 03 Lun-A Emergency Response Procedure6 3000-S-90-04-P0008-00 Rev 02 PA-B Emergency Response Procedure7 4000-S-56-43-P-0001-00 Rev 01 MEG Tie-In Spool Contingency Plan - Replacement with
Flexible Pipe
8 5025-S-90-90-P-0004-00 Rev 0 MEG Tie-In Spool Contingency Plan - Diving Workscope
9 5600-S-90-01-T-0019-00 Rev P1 Pipeline Repair Strategy
Ice during March near platforms
With both connectors placed the spoolpiece (flanged section) replacement is descending.
The connector on the left has been set. The connector on the right was pulled to the replacement section by the tightening of the nuts on the replacement flange.
The concrete protective coating has been removed. The pipeline has been cut in two places and the deteriorated section is being hoisted away.
The ends of the pipeline have been cleaned more than the length of the connector.
REPAIR OF PIPELINE SECTION USING MECHANICAL CONNECTOR
Standard Diverless Spread
Diverless Spread-Lowering Frame
Lowering Frame
Diverless SpreadCoating Removal Units
Diverless SpreadWeld Seam Removal
Diverless Spread1. Oil States equipments (clamps, MAF, connectors and
handling tools) –SEIC
2. Remote Diverless Spread: HireH FramesExcavation toolsPipeline Cutting and concrete removal toolsROV special tooling with manipulatorPipeline retrieval tools
3. Vessel and Logistics – SEIC
-to improve with 100ton
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