Drilling a pipeline

摘要

IT'S NOT OFTEN NATURAL GAS discovered onshore is prevented from getting connected to markets by water,but it has happened in northeastern British Columbia,where Anadarko Canada has been sitting on a 200 bcf reservoir for the last five years.Until recently,the company has been prevented from producing the gas by the 1,000-metre deep Buckinghorse River gorge.The extremely steep and unstable gorge walls made the installation of either a conventional crossing beneath the river or a suspended pipeline over the gorge unacceptably risky options,from both a technical and an economic perspective.