Skirt and Main Pile Grouting for PLQP Jacket Installation

In May 2012 Nautec undertook grouting of 1 jacket and 1 Tripod at the PLQP (Process Cum Living Quarters Platform). The PLQP Jacket along with a flare tripod was to be installed in the Deen Dayal West Field, which is situated in the Krishna Godavari (KG) Basin block KG-OSN-2001/3, 15 km South-East offshore Kakinada, Andhra Pradesh, India.

The Client

Nautec was commissioned by Heerema Marine Contractors (HMC) to carry out grouting services. Larsen and Toubro (L&T) awarded the Process Cum Living Quarters Platform (PLQP) Installation Contract to HMC.

The Scope

The PLQP Jacket along with a flare tripod was to be installed in the Deen Dayal West Field. The PLQP platform was bridge-linked to the existing DDW1 wellhead platform. A flare tripod was to be installed to support the flare bridge. The client required a UHPC grout for the main and skirt pile grouting for the project. Nautec undertook the grouting of 4 main and 8 skirt piles including the jacket and the flare tripod.

The Challenges

Grouting was performed in 2 stages, initial stage of grout plug and secondary grouting using “bottom to top” method. Actual grouting time utilised for pure grouting for 4 skirt piles and 4 main piles was 3.5 days. Crew was demobed post PLQP jacket grouting and re-mobed in Jan 2013 for grouting of 4 skirt piles of flare tripod.

The Services

Grouting of 4 main and 8 skirt piles including the jacket and the flare tripod using Nautec’s UHPC grout NaX 110, which has an average 28 day strength of 110 MPa.

Client Benefit

Nautec mobilised the material and fabricated silos to Semi-Submersible Crane Vessel (SSCV) Hermod offshore Singapore at a very short mobilisation notice. Nautec also fabricated and mobilised a state of the art grouting spread fully automised and as per stringent specifications and needs of HMC and L&T.

2018-04-02T02:30:44+00:00