Channel Crossing (Island Hopping)
JDC successfully drilled hard rocks (granite & granodiorite) under the bed of channels offshore Imabari and installed two water mains of more than 700 meters connecting isolated islands, which eliminated the concern over the water mains to suffer mechanical damages by external forces such as hooking-up of vessel anchors and wave force in adverse weather.
This is the first and sole case of such kind construction accomplished by HDD works in Japan.
JDC has successfully completed installations of conduits for landing various types of lines such as fiber optic cables, power cables and high density polyethylene (HDPE) pipes in Japan and overseas. The most suitable application for shore approach is HDD method with following advantages it realizes.
1. No environmental damage
2. No pollution in the sea
3. No interference to other activities for fishery or shipping.
Conduit for landing of communication/power cables,
casing drilling applied
(In Japan. Philippines and Singapore)
JDC has designed and successfully installed conduits for landing of communication and electric power submarine cable systems utilizing Casing Drilling Method.
In Okinawa, JDC installed conduits for communication/power cable from shore to outside coral reef with minimum environmental impact.
|Punch-out at outer rim of coral inhabitant|
Conduit for Deep Seawater Intake Line
(In Shizuoka, Japan)
JDC has installed a conduit for landing of HDPE pipe to pumping up deep sea water at the Izu Peninsula in Japan.
Drilling through Mountains
JDC has established a method of drilling through mountains for installation of straight, long distance pipeline through hard and solid rock. Installation of pipeline in the mountainous area requires taking a long route going around surface of mountains to reach the target point. JDC's method of drilling through mountains dramatically improves the efficiency in installing lengthy pipeline in the mountainous areas by providing short-cut and consequently reduced the work period and installation costs.
Tunnel Drainage Pipeline
(In Kumamoto, Japan. For Ministry of Land, Infrastructure, Transport and Tourism)
From inside of the tunnel, JDC drilled dead ended borehole and successfully installed a drainage pipeline. The far end of the pipeline was placed at the bottom of planned 40 meter-deep settling shaft at 290 meters away from entry. At the construction of shaft later the end of installed pipe was found within the planned shaft, which proved the reliability of course-control skill and the accuracy of positioning survey tools.
|Drill spread was located inside the tunnel|
Waterline Installation in Deep Mountain
(For Municipality of Sado, Japan)
A conventional open-cut pipeline installation method requires taking detour on the surface of the mountain, mostly along the existing roads. The detour route amounted to 3,000 meters in this case. As an alternative way, JDC drilled through andesite in the mountain and installed a straight waterline at the length of 650 meters only. Considerable reduction of the installation time and consequent sizable reduction of the costs was achieved.
|High Density Polyethylene Pipe|
|Short cut through the mountain (Yellow Line)
versus Conventional Routing (Blue Line)
Installation of HDPE through Deep Mountain to Establish Bypass Water Line
(In Nara, Japan)
JDC drilled 600mm bore in hard rock under the mountains and installed 390m of 450mm OD HDPE pipe to establish a flow of clear water from upstream to downstream bypassing a pool in the river.
|Drilled 600mm bore in hard rock and installed bypass waterline||Insertion of HDPE Pipe|
River & Surface Constructions Crossings
Installation of Water Main under Dainichi-gawa River
(In Awaji-shima Is., Japan)
JDC has designed and installed waterline crossing under the Dainich-gawa River in the soils ranging from unconsolidated cobble, and gravels (over 300mm is the largest) to silt and sand in Awaji-shima Is, Japan.
|Product pipe prepared in it's entirety||Product line about to be pulled|
|Route of Drilling/Pipeline|
Installation of Gas Pipeline across River, Railway and Road (In South Sumatra, Indonesia)
JDC successfully installed gas pipelines with various diameters across under rivers, railway and road in South Sumatra, Indonesia.
|Course of the pipeline
under the river bed
|Pulling-back on-going||Pulling-back completed|
Horizontal Drilling Dept, Japan Drilling Co., Ltd.
Tel: +81-3-5847-5858 Fax: +81-3-5644-5702
Please click here for email inquiry.