123456789 Menu Home | About Van Vulpen Mission and vision | Organizational chart | Culture and Mentality | Terms and Conditions | Activities Engineering | Cable techniques | Piping techniques | Sewage engineering | Trenchless techniques | News Van Fountain Pen At Work | Projects | Working at Van Vulpen Open application | Vacancies | Pupils | Training and development | Quality Safety and Environment CO2 Performance Ladder | Certification | Contact Addresses | Customer service connections News Pipe cracking Successful 1st phase in Klundert OVERVIEW NEWS Brochure Sign up for the newsletter You are here: Home | Long drillings for the IJburg heat pipe Long drillings for the IJburg heat pipe It concerned two drillings next to each other; one for the supply of hot water and one for the discharge of cold water. Both bores had a length of 1270 meters. What is special about this work is not so much the length of the borehole and the technique used, but the material and the laying location. This is because it concerns steel in steel; for Van Vulpen the first time. Insulation material was installed between the steel pipe and the steel jacket to retain the heat. Intersection drilling An intersection drilling has been chosen. For this purpose, a drilling rig was placed at both the entry and exit points. At the entry point there was a 250-ton drilling rig and at the exit point an 80-ton drilling rig was sufficient in this case. Both positions drilled towards each other using a gyroscope and underground navigation equipment. The drill heads met about halfway. As a result, the technique is also called 'meet in the middle'. At that moment, one drill head retracts and the other goes along with it in the borehole that has been created, thus creating a pressure reduction on the exit side, which reduces the risk of damage to the surrounding buildings. Pilot drilling successful Both pilot wells were successfully carried out at the end of March. The drilling fluid has been returned to the entry point via the drill rods of the second borehole, so that unnecessary transport movements are prevented. Lay-out location on the IJ The steel pipes to be retracted were welded together by Denys. Van Vulpen then laid out these pipes on the water. Various pontoons, mini diggers and two Big Floats (crawler cranes floating on the water) were used for this. Floating pipes kept the steel pipes above water. Once clearing of the boreholes was completed, both lines were retracted using a cat-back of two to three cranes. This to be able to maintain the correct curvature. Vacancies Contractor As contractor you organize the preparation and execution of the work agreed with the client in an efficient, safe and environmentally responsible manner. You are financially responsible for work and project and you manage several teams on a daily basis. OVERVIEW OF VACANCIES Copyright Van Vulpen - All rights reserved