Because according to the arrangement of the United States, China and Russian oil companies are American employees.
At that time, PetroChina mentioned in the news that the oil mined by Chinese and Russian companies must be sold to American oil companies at the agreed price on the spot. This agreed price is determined when bidding, and the basic principle is mining cost+reasonable labor outsourcing contract profit. The price disclosed by PetroChina is about $ 5-8 per barrel. Different oil wells have different production costs and approved contract prices. If China needs to import this batch of oil, it needs to buy it from American oil companies, and the price will be settled according to the international crude oil futures market price on that day, when the price fluctuated between 20-35 USD per barrel. As China has quickly become the largest oil importer, it certainly likes to import its own oil in full, so the oil mined by PetroChina in Iraq is directly transported back to China, and then the price difference is settled with American oil companies. The final essence is that for every barrel of oil produced by PetroChina, it has to pay the difference of 15-27 dollars to the United States, which is also the "right tax". This is America's war dividend.
Why are Chinese and Russian companies allowed to participate in bidding? This is the return that the United States, as China and Russia, did not oppose the US sending troops in the Security Council. So don't feel unfair. If it weren't for China and Russia's voting rights in the Security Council, this wage earner wouldn't have this position even if he had strong oil exploration ability.
In addition to this income, the United States also gained a financial advantage to ensure the settlement of US dollar oil, thus ensuring the status of the US dollar.