Pre-drilling & grouting of anchor piles into rock for Reliance Ports & Terminals Ltd, Gulf of Kutch, India

Antara Koh (I) Pte Ltd was contracted by Leighton Contractors (India) Pvt. Ltd. as the specialist drilling contractor for installation of anchor piles. The anchor piles were installed for 3 numbers of Single Point Mooring System and 1 number of Riser Platform. Our work scope is briefly described below:

1. New Riser Platform (D) – Installation of temporary drilling casing of Ø2168mm x T19mm x L55m in water depths of 37m ~ 40m. Pre-drilling and grouting in Basalt rock 4 nos. of Ø2032mm Platform Piles.

2. SPM 3 – Installation of temporary drilling casing of Ø1258mm x T19mm x L55m and Ø2168mm x T19mm x L55mm in water depths of 37m ~ 44m. Pre-drilling and grouting into Basalt rock 4 nos. of Ø1219 x T19mm PLEM Piles, 6 nos. of Ø2032mm x T19mm Anchor Piles and 2 nos. of Ø2032mm x 19mm earthquake piles.

3. SPM 4 & 5 – Installation of temporary drilling casing of Ø1258mm x T19mm x L55m and Ø2168mm x T19mm x L55m in water depths of 37m ~ 44m. Pre-drilling and grouting into rock 8 nos. of Ø1219 x T19mm PLEM Piles and 18 nos. of Ø2032mm x T19mm Anchor Piles.

The pre-drilling works were carried out with WIRTH B18 Reverse Circulation Drill and assisted by crane and jack-up barges. The piles are socket 11m ~ 13m into the Basalt rock and annulus area grouted with non-shrink grout. During execution of the works, the site was subjected to sea swells of 1m ~ 3m in height and wind speed up to 20 ~ 30 knots. The project was completed on time and within budget.

Lifting operation in process, temporary casing lifted and pitch into position. RCD equipment fitted to pipe.

Drill bit, drills drum and drill stabilizer being lowered into position to commence drilling into hard basalt.

Drilling in progress using Wirth B18 reverse circulation drill with Leighton's floating crane barge MYNX and Valentine Maritime's jack up barge JU251 alongside

Fabrication and placing of survey instrument on SPM PLEM pile guide frame

Drilling works in progress from Jack-up barge

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