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Longford Liquids Pipeline – Specialist Engineering and QA Inspection

The Longford Liquids Pipeline under construction by Nacap Australia has utilised up to 6 HDD rigs at anyone time and has over 80 HDD crossings proposed along the 186 km pipeline route.

Stockton Drilling Services are providing HDD services for the Longford Liquids Pipeline both during the detailed design and construction phase. The works consists of engineering, construction and installation of numerous DN350 crossings along the route using trenchless pipeline installation methods. The crossings have been characterised as either Major or Minor. In total over 6 km of Major HDD’s and 2.5 km of Minor HDD’s are planned for execution:

Season 1 2015/16

    • 8 Major Crossings utilising 3 HDD maxi rigs
    • 44 Minor Crossings utilising 3 HDD mini rigs

Season 2 2016/17

    • 7 Major Crossings utilising 2 HDD maxi rigs
    • 25 Minor Crossings utilising 2 HDD mini rigs

The following client support services are been provided:

  1. HDD Engineering support and review during the detailed design and in the lead up to Construction. Services included review of HDD Contractors engineering, procedures, drawings and plans and participation in risk and constructability workshops.
  1. Supply of specialised HDD Field Superintendents during the construction phase. The Superintendents act in a Client advisory role, overseeing the HDD contractor on site to ensure that the project is executed as planned, and in a safe and environmentally responsible manner.

Having conducted a high level review of the project documentation there were a number of potential high-level risks that are been assessed and managed by Stockton construction personnel, these include;

  1. Complex geological conditions.
  2. Risk of frac-out which could occur in sections of low-lying land, shallow creeks, road and rail crossings.
  3. Specification requirements due to space restrictions, shared easement, tight radius design and compound curves.
  4. Interface and interference issues from adjacent assets (DN250 LP Gas, DN700 Oil Pipeline) and future FOC at 3m centres.

Contact Us

Charles Stockton
Managing Director/HDD Specialist

+61 (0) 400 623 441
158B Gaudrons Road Sapphire Beach NSW, 2450, Australia

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