New Panna SBM Pile Sleeves Subsea Infill Grouting, India

In February 2014 Nautec carried out grouting of pile sleeve annuli at New SBM in Panna Field, operated by British Gas, India as contracted by Essar Offshore Subsea Ltd. The pile sleeve annuli was grouted with Nautec’s NaX™ Q110 UHPC (Ultra High Performance Cementitious) Materials.

The Client

Nautec was contracted by Essar Offshore Subsea Ltd to do grouting work on New SBM platform in Panna Field, India which is operated by British Gas.

The Scope

The work scope included installation of all grout inlet primary and secondary ports for all 4 piles; connecting grout hoses onto grout inlet primary ports and pumping grout through flexible hoses for the infill grouting of the pile sleeve annuli.

The Challenges

With the jacket in place the pile sleeves were positioned at mudline approximately -45m water depth. Hence, the grouting works took place subsea with the assistance of divers.

The high viscosity and inner cohesion of NaX™ UHPC materials prevent “washing out” of particles and separation of mixture with water when cast underwater.

The Services

The New Panna SBM- installation operation took place from Nand Gaurav barge offshore. Upon installing all grout inlet primary ports and secondary ports for all 4 piles, the PLEM structure was lifted by Nand Gaurav crane to be positioned under approximately -45 meter water depth. Once the hammering process on all 4 piles was completed, Nautec’s grouting team connected the grout hoses onto the grout inlet primary port. With the assistance of divers the grout was pumped through flexible hoses for the infill grouting of the pile sleeve annuli. The grouting job was completed utilising Nautec’s small footprint spread, which was situated on Nand Guarav closely positioned to the SBM.

Client Benefit

Almost 70% of the grout strength required by the client was achieved within 24 hours and all 4 pile sleeve annuli of new Panna SBM-PLEM were grouted successfully with Nautec’s NaX™ Q110 UHPC materials in 3 working days.

2018-05-28T09:11:35+00:00