Always Moving Forward in Pipeline Technology
Mar 12, 2019
A dense pipeline network spanning over three million kilometers is the global backbone of industry and commerce. To keep supply stable, innovative pipeline companies are constantly expanding the network and making it denser even in sparsely populated places. In the pipeline business too, Herrenknecht is a dependable partner supporting its contractors throughout the duration of every project. Groundbreaking pipeline tools close technology gaps and offer individual solutions for any project challenge.
Crossing under a hurricane protection levee in Texas, Direct Pipe® met even the stringent safety requirements of the US Army Corps of Engineers. The method combines the advantages of microtunnelling and HDD technology. In a single step, a prefabricated pipeline can be installed trenchless and the required borehole excavated at the same time.
In Auckland, for example, Direct Pipe® proved itself in the modernization of a wastewater treatment plant. Here the Herrenknecht Utility machine set a new distance record: it bored its 1,930 meters long way through the New Zealand subsoil into the sea. By using the innovative technology, harmful environmental effects on the underwater flora were minimized.
The company also offers HDD expertise for pipeline installations like this from the mainland to the seabed (shore approach). In Anglesea, Australia, the Dunstans Construction Group replaced the sea outfall pipe of a water treatment plant cut off by a collapsing cliff using a Herrenknecht HK250C rig within a few months.
The existing gas pipeline had to be lowered by eight meters and replaced. After only a week, the approximately 250 meter long and 18 meter deep river crossing was successfully completed. A special feature of this project: the HK80CK rig used is hybrid and powered by both a diesel engine and an electric motor.
Once the rig is in position, only the electric motor runs during the drilling process, resulting in lower exhaust emissions. In urban areas in particular, the compact rig stands out with its space-saving design, while its low noise levels can increase acceptance of construction work among the population.
In Zevenbergen in the Netherlands, renewable geothermal energy accessed by Herrenknecht deep drilling rigs is used to heat multiple greenhouses. The principle is simple: a well raises the warm water from a depth of 1,535 meters. Then, after the heat has been extracted, the cold water is pumped down a second well back into the reservoir.
To drive advances in the pipeline market, Herrenknecht is constantly working to improve existing pipeline technologies. In close cooperation with HDD specialists, for example, innovative tools have been developed that greatly simplify the previously multi-stage reaming process. The Full Face Hole Opener (FFHO) is a milestone in HDD pipeline installation as it enables the efficient reaming of pilot holes in a single step.
The Downhole Jetpump (DHJP) removes the drill cuttings in the drill string itself and not through the borehole. This means HDD boreholes are cleaned much more effectively and safely than before. The tools can be used individually or in combination to help to get the best results from any project.
In late 2018, a new HDD service hub opened in Houston, Texas, right in the heart of the American pipeline business. The U.S. state is the world's sixth largest oil producer. With its location, the company is now even closer to the center of the U.S. oil industry.
Discover more pipeline challenges in the Herrenknecht online magazine All Around #9 “Focus on Pipeline”
Herrenknecht AGHerrenknecht AG is the only company worldwide to deliver tunnel boring machines for all geologies and in all diameters – ranging from 0.10 to 19 meters. The product range comprises tailor-made machines for traffic, supply and disposal tunnels, technologies for routing of pipe lines, as well as additional equipment and service packages. Herrenknecht also manufactures drilling equipment for vertical and inclined shafts as well as deep drilling rigs.
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