Halliburton is not the only oil company to suspend its activities in Venezuela. Last week, CA-based Chevron ( CVX - Free Report ) was forced by the federal government to reduce operations in the country. However, it was unwilling to exit Venezuela, given its investment of roughly $2.6 billion in the country to date. Also, withdrawing would cede U.S. share in Venezuela and provide an opportunity for Russian and Chinese players to influence the Latin American market.