DUBAI (Reuters) -Saudi Aramco has signed 34 preliminary agreements with major U.S. companies, potentially worth as much as $90 billion, the oil giant said on Wednesday.

The deals highlight deepening U.S.-Saudi commercial ties as the kingdom pushes ahead to diversify its economy and attract foreign investment. The agreements span liquid natural gas, fuels, chemicals, emission-reduction technologies and artificial intelligence, it added.

"The U.S. is really a good place to put our investment," Aramco CEO Amin Nasser said on Tuesday at the U.S.-Saudi Investment Forum in Riyadh. He was announcing deals with U.S. liquefied natural gas producer NextDecade ( NEXT ) and utility company Sempra ( SRE ).

The event coincided with U.S. President Donald Trump's four-day tour of the Gulf, marked by lavish receptions and a series of business deals, including Saudi Arabia's $600 billion pledge to invest in the United States and $142 billion in arms agreements.