Piezoelectric energy storage device for oil well downhole detection equipment

Abstract

The invention discloses a piezoelectric energy storage device for oil well downhole detection equipment. The upper and lower ends of a cylindrical body are provided with threaded screw threads; the threaded screw threads are connected with a sucker rod string; multiple rows of cantilever beam substrates are arranged on the circumference of the cylindrical body in parallel; piezoelectric ceramic pieces are adhered to the upper and lower sides of the cantilever beam substrates through a conductive adhesive; a mass block is arranged at the tail end of each cantilever beam substrate; the mass block is not in contact with the sucker rod string; a protective cover is also arranged outside the cylindrical body; a circuit board is arranged at the middle part of the cylindrical body; and an unstable current generated by the piezoelectric ceramic pieces passes through a booster circuit, a rectifying circuit and a load matching circuit to obtain a stable direct current for storage so as to be used by a load. The piezoelectric energy storage device for the oil well downhole detection equipment provided by the invention is simple in structure; and energy generated by the vibration shock of a downhole fluid in the oil pumping process can be converted into available electric energy, and the electric energy is stored in a rechargeable battery to be used by the downhole detection equipment.

Description

technical field [0001] The present invention relates to the combination of the field of mechanical oil recovery engineering research and the field of electrical technology, and in particular relates to energy obtained from downhole liquid vibrations in oil wells, transformed and stored in piezoelectric energy storage devices, and is suitable for energy obtained from vibration environments for conversion and application In particular, it relates to a piezoelectric energy storage device used for downhole detection equipment in oil wells. Background technique [0002] Mechanical oil recovery is the main oil recovery method in domestic and foreign oil fields. The efficient operation of downhole equipment is the key to the efficiency of the mechanical recovery system. Therefore, effective monitoring of the operating status of downhole equipment and real-time adjustment of oil production parameters are the core of oilfield management. The promotion and application of monitoring eq...

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Problems solved by technology

[0002] Mechanical oil recovery is the main oil recovery method in domestic and foreign oil fields. The efficient operation of downhole equipment is the key to the efficiency of the mechanical recovery system. Therefore, effective monitoring of the operating status of downhole equipment and real-time adjustment of oil production parameters are the core of oilfield management. The promotion and application of monitoring equipment has always been a problem. For example, downhole dynamometers used to monitor the operating status of oil well pumps, intelligent water distributors used to monitor and adjust the injection volume of water injection layers, etc. These devices require continuous power supply. Due to the limitation of wellbore space, continuous power supply downhole has become a problem, resulting in the application of downhole monitoring equipment is still in the experimental research stage

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