Northwest Pipeline Corp. has filed a registration statement with the Securities and Exchange Commission to sell $100 million of debentures due 2018.

The proposed offering will be managed by The First Boston Corp. and Salomon Brothers Inc.The Salt Lake-based company said it intends to apply the net proceeds from the sale to finance a portion of proposed capital expenditures, contract reformation costs and maturing debt repayments.

Northwest Pipeline is a subsidiary of The Williams Companies Inc. headquartered in Tulsa, Okla., engaged in pipeline transmission of natural gas and petroleum products and interstate fiber optic telecommunications.