October 16, 2015 Klaipėda, Lithuania / Schwanau, Germany Because of its great economic importance for Lithuania, the project was under enormous time pressure from the very beginning. Project delays had to be avoided at all costs. Even in the event of greater forces occurring during pipeline installation, no delays were permitted. The prerequisite: any additional power required had to be quickly mobilized on the jobsite. Specifically for this purpose the customer ordered a Herrenknecht Pipe Thruster. It has the necessary power reserves and if required it will provide support with thrust and pulling forces of up to 5,000kN (500tonnes). A few days after the order, Herrenknecht made the equipment available to the customer. Thanks to the extensive rental pool in Germany, even when requested at short notice, Herrenknecht can provide its customers with standard equipment quickly and on attractive terms. At the customer's request Herrenknecht supplied the HDD Rig with additional drive power to increase the tripping speed during operation. This saved the drilling team valuable time.
Such a commitment paid off. In just 34 hours the customer completed the final pipe installation with an entry angle of 10,5° at pipe side. In future, Lithuania can source liquefied natural gas from the global market, thereby expanding its national energy mix.
The HDD method (Horizontal Directional Drilling) is a worldwide tried-and-tested trenchless technology for the underground installation of pipelines. In a first step, a pilot drill is driven from the launch to the target point. In a second step, the pilot hole is widened in the opposite direction by a so-called reamer. The reaming is often repeated several times depending on diameter and geological ground conditions. In a last step, the pipeline is inserted into the reamed and stabilized bore hole. HDD rigs from Herrenknecht are used worldwide to install oil and gas pipelines as well as water and wastewater pipelines with diameters of up to two meters (80 inches) - rapidly, cost-efficiently and causing low impact on the environment.
Machine data HK400M, HK500PT
- Machine type: HDD Rig HK400M, H-204
- Pipeline diameter:
- Gas: 28"
- FOC: 6" and 8¾"
- Max. pulling force: 400t (4,000kN)
- Torque: 140 kNm
- Machine type: Pipe Thruster HK500PT, H273
- Max. thrust and pulling force: 500t (5,000kN)
- Location: Klaipėda, Lithuania
- Client: PPS PIPELINE SYSTEMS GMBH
- Contractor: Albrehta Sp. z o.o.
- Application: Gas / FOC
- Pipeline length:
- Gas: 2,310m and 610m
- FOC: 2,310m and 350m
- Geology: Sand, gravel, cobbles marly till, boulders