Abstract
The Jansz IO HDD Project is one of the largest Horizontal Directional Drilling (HDD) projects completed in Australasia. Completed between 2021 to 2025, it presented challenges throughout the planning and execution process. This project consisted of the new installation of 3x 600m DN630 HDPE conduits for Chevron Australia as part of the Jansz IO Subsea Compression Project and Barrow Island Umbilical Project (BUP). From the initial stages of the project, constraints were identified with the mobilisation and planning due to the classification of Barrow Island as a Class A Nature Reserve. Additionally, the geotechnical composition of the ground was highly fractured with frequent and significant changes in composition, along with full losses of drilling fluid. The experienced drilling conditions deviated from the interpolated borehole data leading to challenges with steering and installation. This paper will provide a summary of the challenges experienced and the actions taken, along with their effectiveness, when drilling in such challenging conditions. The project resulted in successful installation of two of the critical casings for gas plant continuation and subsea connection, and one abandoned installation. This paper will provide an insight into working in some of the most challenging HDD conditions experienced in Australia, and cover the lessons learnt and improvements from engineering to construction. 1 No-Dig Down Under 2025 Jansz IO Project Rutherford, John
Full paper available to ASTT members
The abstract above is open to everyone. Sign in with your ASTT membership email to open the full PDF.