Patent Number: 6,293,340

Title: Gas-lift-ball control device and oil producing method using said device

Abstract: This invention relates to a gas-lift ball control device in gas-lift ball oil recovery and a method of oil recovery with the device. In the device a low pressure gas outlet, an oil-gas-ball inlet and an oil outlet are provided on casing of an oil-gas-ball separator. A spiral pipe communicating with the oil-gas-ball inlet is provided within the casing. There is a separating umbrella on the spiral pipe and a filter below the spiral pipe. There is a ball-distributing valve inside the filter. The valve body is provided with a ball-entry bore, a low pressure gas-bore, a high pressure gas-entry bore and a high pressure gas-exit bore. There is a gas path communicating with said two pairs of bore in a manner of rotation or sliding. Gas and balls can be continuously supplied to a gas transporting pipe through the ball-distributing valve. The device is efficient with less gas and simple structure. It can be easily made and be securely and reliably operated. The method relates to a method of oil recovery with the gas-lift ball control device.

Inventors: Wu; Chenglin (300280 Tianjin City, CN)


International Classification: E21B 43/12 (20060101); E21B 043/00 ()

Expiration Date: 09/25/2018