Low-yield well numerically controlled oil pipe oil bailing device and oil bailing method

Abstract

The invention discloses a low-yield well numerically controlled oil pipe oil bailing device. The device comprises an oil pipe, a support, a wire arraying device and a wire winding device, wherein the oil pipe, the support, the wire arraying device and the wire winding device are sequentially fixedly arranged on the ground on one side of an oil well. The oil pipe is located inside the oil well. A cross-shaped check block inside the oil pipe is in threaded connection with the bottom end of the oil pipe, a flexible pump is matched with the inner wall of the oil pipe, the lower end of the flexible pump is in threaded connection with a balance weight, the upper end of the flexible pump is fixedly connected with a steel wire rope, a sound symbol is fixedly arranged on the outer wall of the upper portion of the oil pipe, and the upper end of the oil pipe is fixed to a well mouth switching device in a threaded mode. A working fluid level detection device is installed on the well mouth switching device. The invention further discloses an oil bailing method by the utilization of the low-yield well numerically controlled oil pipe oil bailing device. The oil bailing method includes the steps that firstly, the low-yield well numerically controlled oil pipe oil bailing device is installed and tested, trial bailing is conducted after a system is set and initialized, and then automatic oil bailing is started. The device and method can solve the problems that a system of an oil pumping machine, an oil pumping rod and an oil pumping pump is low in efficiency, high in energy consumption and low in utilization rate of the oil well when low permeability and ultra-low permeability reservoirs are exploited and especially when oil production is conducted on a low-yield well.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and relates to a digitally controlled tubing oil fishing device for low-yield wells, and also relates to an oil fishing method using the digitally controlled tubing oil fishing device for low-yield wells. Background technique [0002] With the increasing demand for oil, more and more attention has been paid to the exploration and development of low-permeability and ultra-low-permeability reservoirs, and a large number of such reservoirs have entered the stage of exploitation. Due to the characteristics of low-permeability and ultra-low-permeability reservoirs, the production capacity of oil wells is low and the output of a single well is small; and in the production of low-permeability and ultra-low-permeability reservoirs, pumping units, sucker rods and pumps are mainly used. The "three pumping" system; lead to low efficiency of mechanical recovery system, the average domestic are...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a numerically controlled tubing fishing device for low-production wells, which overcomes the low efficiency of the "three pumping" system, high energy consumption, and poor utilization of oil wells during the production of low-permeability and ultra-low-permeability reservoirs, especially when producing oil from low-production wells. low problem

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