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AbstractAbstract
[en] An alternate well kill (AWK) system developed by Devon Canada and Cooper Cameron Corporation was reviewed. At a development cost of $2 million, it is hoped that the AWK system will offer an on-site, fail-safe means to kill a well, thereby negating the need for elaborate relief well drilling contingencies. An AWK unit has already been transported for testing at a well site in the Beaufort Sea. AWK systems are set for installation into blowout prevention stacks when drilling reaches the blowout risk threshold depth of 500 to 800 metres. The AWK system is ideal for use in the Arctic, where contingency planning for wells is vital due to the Arctic's slow regeneration rates, its short drilling season, and its remoteness. Consisting of a super shear and seal blowout prevention (BOP), the AWK provides the same capability of a BOP while also allowing any obstruction in the hole to be cut while simultaneously achieving a seal. Once activated, high density fluids are pumped down the hole to kill the well. The AWK is designed to be installed below the regular shear rams and BOP, and to operate entirely independently of all other systems in case of a severe power failure. Testing of the AWK is ongoing, even as final drilling preparations are underway. A worst-case scenario blowout and spill could ravage the environment and cost companies hundreds of millions of dollars in control and cleanup costs. Traditionally, relief wells can take up to 6 weeks to drill, during which time hydrocarbons are being released into the environment. The National Energy Board (NEB) has already gained a general acceptance of the AWK concept. 3 figs
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