Fast electric sampler for staged production of horizontal wells

Abstract

The invention discloses a rapid electric sampling device for sectionalized production of a horizontal well, aiming to improve sampling efficiency of reservoir fluid of each subsection of the horizontal well. A righting ring of the sampling device is connected to a radial circular groove at the upper end of the peripheral face of a microcomputer controller, and the bottom end of the microcomputer controller is connected with an electric cavity. A sampling cylinder is connected with the bottom end of the electric cavity, and a radial liquid outlet hole and a sampling hole below the same are formed in the wall of the sampling cylinder. A connecting cylinder provided with a valve bonnet inside is connected with the bottom end of the sampling cylinder. A valve seat provided with a liquid inlet hole is connected with the bottom end of the connecting cylinder. An upper switching valve is arranged in the electric cavity. The top end of the upper switching valve is sequentially connected with a connecting rod and a lower switching valve. Workers perform program setting on the switching valves of the microcomputer controller before the electric sampling device descends the well, the electric sampling device is instructed by the microcomputer controller to execute programs according to settings after descending the well, the upper and the lower switching valves are driven to be opened or closed to realize extraction of the reservoir fluid, so that sampling of each subsection of the horizontal well can be completed at one step through cooperation of a packer, testing time can be shortened effectively, and construction cost can be reduced.

Description

technical field [0001] The invention relates to a fast electric sampler for segmental production of horizontal wells, belonging to the technical field of horizontal well production. Background technique [0002] With the development of jet fracturing technology, the number of fracturing stages in horizontal wells has gradually increased, making the time required for water search tests in stages longer and longer. Since this problem will seriously affect the normal performance of horizontal well productivity, a downhole sampler is needed, which can take all the quasi-production layer fluid downhole and shorten the time of horizontal well testing, so as to provide a basis for ground analysis. At present, the commonly used downhole samplers mainly adopt the closing forms such as clock control, wall hanging and hammering, and most of them use steel wires for sampling operations. There are mainly displacement samplers in China, that is, the downhole fluid displaces the special l...

AI Technical Summary

Problems solved by technology

Due to the limitations of the outer diameter, operation and closing methods of the above-mentioned sampling instruments, they cannot meet the requirements of simultaneous sampling in each stage of multi-stage production horizontal wells

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