- Stockton Complete Bressay Sound Crossing
- Stockton Install Galway HDD
- Ground Investigation Project of the Year Finalists
- Stockton Shortlisted for SME Business of the Year 2014
- Team Stocktons 10km Challenge
- Success for Stocktons at RHS Chelsea
- SDL enters into Joint Venture with SweOffshore
- Stocktons Shortlisted for Innovation Of The Year Award
- Shapinsay project completion
- Achilles Carbon Reduction Programme
- Pipe Tech World Summit 2012
- British Safety Council membership
- Stockton install solar panels
- Achilles Verify audit
- Orkney project completion
- Chelsea Flower Show gold for sustainable garden 2011
Stockton Install Galway HDD
Challenging River Corrib Crossing Completed
During April 2016, Stockton commenced work on the River Corrib crossing project in Galway, Ireland, sub-contracted for GMC Utilities - principle contractor for SSE.
The project involved the installation of a 390 metre HDPE pipe-bundle beneath the River Corrib, with SDL utilising their 250 tonne drill rig to drill a bore of 28 inch to install the HDPE bundle - consisting of 3 x 200mm and 3 x 125mm pipes, at a site located close to the historic Menlo Castle, a Galway County Heritage site.
Drilling commenced from an entry-site on the Western bank of the Corrib, with an exit-point set within the National University of Ireland Galway (NUIG) campus. The aim of the HDD installation was in order to complete a 110kV grid connection to the SSE wind park west of Galway city.
As well as having a width of approximately 110 metres, the Corrib, which flows along a fault line where two rock types - granite and limestone - converge, is also a Special Area of Conservation (SAC).
These factors - combined with the ongoing activities at the University and the ruins of the medieval castle - resulted in the project presenting an array of logistically and technically challenging aspects.
In order to overcome these challenges, the HDD profile was designed as a continuous curve from the entry point, entering at 13 degrees to the horizontal and following a vertical radius of no less than 400 metres.
Two pilot holes were drilled, utilising a six and three-quarter inch down-hole mud-motor, powering an eigth-and-a-half inch tri-cone drill bit to follow the predetermined profile trajectory to the pre-planned exit point.
The first pilot hole had a 125mm HDPE line inserted to be used as a drilling fluid return line. The second was reamed in two stages to a 28 inch diameter to facilitate the insertion of the HDPE pipeline bundle.
Following the successful completion of the project, SSE Project Manager Paul Lloyd said: During the course of the project a number of day to day problems did arise which could have developed into something far worse but for the correct and timely response of Stockton’s personnel on site.
Stockton demonstrated a thorough knowledge of this field and an understanding of the critical design issues that must be addressed in order to successfully undertake a complex project of this nature.
At all times Stockton’s site personnel conducted their business in a safe professional and courteous manner and they were a pleasure to deal with.
For any enquiries, please contact head office on 01924 242128, or email Head.Office@stocktondrilling.com.