美国至7月18日当周总钻井总数 544口，前值537口。

Core Insights - The total number of active drilling rigs in the United States increased to 544 as of the week ending July 18, up from the previous count of 537 [1] Group 1 - The increase in the total number of drilling rigs indicates a potential rise in exploration and production activities within the oil and gas industry [1]