Towngas Lantau link beach approach, Hong Kong and China Gas Co. Ltd.
Conference
·
OSTI ID:485068
- Cherrington Corp., Sacramento, CA (United States)
Horizontal directional drilling (HDD) laid dual, 12-in. OD, natural gas pipelines beneath a critical sea wall on Lantau island, Hong Kong New Territories. This was part of a 30-mile gas pipeline crossing under the South China Sea associated with the Towngas Lantau construction project for Hong Kong`s new Chep Lap Kok International Airport. During a twenty-one day project, Cherrington Corp. drilled and forward-reamed two, 20-in., 1,294-ft. holes to pull back the twin pipelines. The project was completed during typhoon weather, strong currents and logistical problems associated with operation in a remote uninhabited area. The successful installation of the twin gas lines was the result of proper hole design, high-quality surveying techniques and innovative directional drilling methods. Each hole exited approximately 90-ft. from the pre-installed product pipe in the sea floor trench. A 20-in. reamer with bull-nose and rear stabilizer was used to open both holes from 9 to 20-inches.
- OSTI ID:
- 485068
- Report Number(s):
- CONF-970146--; ISBN 1-890277-02-9
- Country of Publication:
- United States
- Language:
- English
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