Pressure gauge supporting device, pressure gauge well descending method and well washing method

The invention provides a pressure meter supporting device and a method for descending a pressure meter into a well, and belongs to the technical field of oil and gas field development engineering. The device comprises an outer cylinder, an inner cylinder and a pressure gauge mounting cylinder. The outer cylinder comprises a first cylinder body, a second cylinder body and a connecting arm. The first barrel is connected with an oil pipe, the second barrel is coaxially located in the first barrel, and the two ends of the connecting arm are connected with the first barrel and the second barrel respectively. The outer cylinder is provided with a first channel penetrating through the first cylinder body, the connecting arm and the second cylinder body. And the inner cylinder is connected with the central pipe and is coaxially inserted into the second cylinder body. The pressure meter mounting cylinder is connected with the inner wall of the inner cylinder, a fluid channel is arranged between the pressure meter moun