Intelligent separation production string

Abstract

The invention discloses an intelligent separate mining production string, including a layered production string and a fixed valve, the fixed valve is connected above the layered production string, and the layered production string includes at least two layered control switches, at least Two packers, one packer is connected between two layer control switches, one packer is connected above the top layer control switch, and the bottom end of the layer production string is connected to a plug. Layer control switches correspond to their respective production oil layers. All packers are equipped with axial penetration fixing holes for the control cables to pass through. All layer control switches are electrically connected with the control cables in parallel to form an integrated structure. . The present invention utilizes the integral cable-split production tubing string, aiming at the tubular pump lifting system and the rodless pump lifting system such as the electric pump, while carrying out the pressure setting of the packer, and quickly realizes the large-displacement lifting, thereby Reduce the labor intensity of workers and shorten the construction period.

Description

technical field [0001] The invention relates to an oilfield production pipe string, in particular to an intelligent separate production pipe string. Background technique [0002] With the long development of major oilfields, the oilfield has entered the late stage of high water cut development, and the production of oil wells has the characteristics of many oil layers, long well intervals, large interlayers, and serious interlayer heterogeneity. The production of oil wells has gradually developed from traditional single well commingled production For layered oil recovery, the oil recovery rate is improved, the development cost is saved, and good economic benefits are achieved. [0003] However, with the rapid development of digitization and intelligence in oilfields, there are still deficiencies in the production process strings that use cables to control layered switches at this stage: For rod pump lifting systems, first, for integral production strings, rod pumps are used....

AI Technical Summary

Problems solved by technology

[0003] However, with the rapid development of digitization and intelligence in oilfields, there are still deficiencies in the production process strings that use cables to control layered switches at this stage: For rod pump lifting systems, first, for integral production strings, rod pumps are used. The matching hydraulic packer, the rod pump displacement is relatively small, the current maximum pump diameter is 56mm, which cannot meet the lifting requirements of large displacement, while the tube pump is used to match the oil and water packer, which has poor reliability and damage to The post-operation will cause adverse effects, and it has no field application value; the second is to use the throw-away method to produce the pipe string. After the pipe string is set and put away, the cable control signal needs to be connected twice, and the signal reliability is difficult to guarantee; for electric pumps, etc. The rod pump lifting system adopts a hands-off layered pipe string. After the pipe string is set, it is thrown away. The control signal cannot be monitored all the time during the running of the completion string, and it is impossible to judge whether the running process is effective. At the same time, the production The cable control signal of the layered control switch in the pipe string needs to be connected twice, and the signal reliability is difficult to guarantee

In the existing technology, the layered control switch is connected to the cable in the later stage. This kind of secondary connection has too many disadvantages, as mentioned in the previous paragraph

Images