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Horizontal Directional Drilling
Trenchless Construction Technology |
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| Horizontal directional drilling offers minimal environmental disturbance during project construction and Mersing Construction & Engineering Sdn Bhd has achieved a high level of technical acceptance within the industry. Depending on soil conditions, our drilling rigs have the capacity to drill up to lengths of 2000m with a diameter of 1000mm. Directional drilling has been used to install pipelines carrying oil, natural gas, petrochemicals, water, sewerage and other products as well as conduits for utility services, electric and fibre optic cables under rivers, busy streets, highways, railroads, airport runways, shore approaches, islands, areas congested with buildings, pipeline corridors, future water channels and other locations where trenchless installation methods are applicable. Engineering excellence, technical innovation and in-depth experience have resulted in the development by the Company of such advanced applications of directional drilling technology. |
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| The Technique |
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| Drilling The Profile |
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| A small diameter pilot hole is drilled to a pre-determined path using a jet bit on the end of the pilot string and drilling operations take place until the exit point is reached. |
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| Enlarging The Hole |
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| Pre-reaming operations are carried out to enlarge the drilled hole to a size suitable for accepting the product pipe. Pull-back pipe is added behind the reamer. Depending upon the pipe diameter to be installed several pre-reaming operations may be necessary, each progressively enlarging the hole. |
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| Installing The Pipe |
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| The pull-back pipe is connected to a cleaning reamer which in turn connects to a swivel joint, (to prevent pipe rotation) that is attached to the pipeline towhead. The drill rig is then used to pull the product pipe into the preformed hole. |
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| Applications: |
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Road, River, Canal and Rail crossings |
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Airport runway crossings |
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Landfalls and Outfalls – Sea defence and beach crossings |
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| Pipe Jacking |
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| The advent of trenchless technology has brought about an entirely new dimension in the installation of underground pipes... |
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| Pipe Rehabilitation |
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| The pipe bursting system is a new technology used to replace existing water, sewer or gas mains that has become faulty due to age... |
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| OUR PROJECTS |
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HDD Across Hou Lung River, |
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Taiwan |
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Betara Complex Development, |
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Jambi Province, Indonesia |
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Inter Refinery Pipeline (IRP) For |
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Takreer, Abu Dhabi, UAE Project No. 6089 |
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HDD Works at R-Jen River, Taiwan |
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