Gas-lift production plunger service time testing device and method

Abstract

The invention discloses a gas-lift production plunger service time testing device and method, and belongs to the field of oil field testing. The gas-lift production plunger service time testing devicecomprises a gas lift valve working barrel, an inner pipe short section, an inner pipe and an outer pipe which communicate sequentially, and further comprises a lower sealing-plugging piece, a gas lift valve, a plunger support, a middle sealing-plugging piece, an upper sealing-plugging piece, a timing electric cabinet, and an electronic second chronograph. The lower sealing-plugging piece is usedfor sealing and plugging the lower end of the outer pipe and the lower end of the gas lift valve working barrel; a gas outlet of the gas lift valve communicates with an inner cavity of the gas lift valve working barrel; a plunger is arranged at the upper end of the plunger support in a seating mode, and the lower end of the plunger support is provided with a lower power connecting ring to be connected with two first conducting rings located at the lower end of a first elastic fixed part which plays a clearance fit role in the inner cavity of the joint of the gas lift valve working barrel and the inner pipe short section; the middle sealing-plugging piece is used for sealing and plugging the upper end of the outer pipe, and a gas inlet connector is arranged on the middle sealing-plugging piece; and the upper sealing-plugging piece is used for sealing and plugging the upper end of the inner pipe, and two second conducting rings connected with an upper power connecting pipe which can slide up and down inside are arranged on the upper sealing-plugging piece. When the first conducting rings are connected with the lower power connecting ring or the second conducting rings are connected with the upper power connecting pipe, the timing electric cabinet receives timing start or stop signals, and sends timing start or stop control instructions to the electronic second chronograph.

Description

technical field [0001] The invention relates to the field of oilfield testing, in particular to a device and method for testing the running time of a gas-lift oil production plunger. Background technique [0002] With the reduction of crude oil self-spraying production in the oil well, or after the oil well loses the self-spraying ability, the production of crude oil can be increased by means of plunger gas lift to maintain the self-spraying production of the oil well. Among them, the plunger can move up and down in the wellhead Christmas tree and the tubing. When the fluid pressure and flow in the tubing string are not enough to lift the plunger, the plunger moves downward under the action of its own gravity. The fluid (gas and liquid mixture) flows into the upper end of the plunger through the gap between the outer edge of the plunger and the inner wall of the tubing; when the fluid pressure at the lower end of the plunger rises, the plunger is lifted to the wellhead, and ...

AI Technical Summary

Problems solved by technology

[0005] The device provided by the prior art can measure the temperature, pressure and liquid flow rate of the plunger gas lift, and cannot analyze the force condition of the plunger by recording the running time of the plunger through the test

Images