Oil well downhole power supply device and method

Abstract

The invention provides an oil well downhole power supply device and method. The device comprises a shell body, an air bag, a transmission piece, a transmission mechanism, a ratchet mechanism and magnetic pieces. The interior and the exterior of the shell body communicate. The air bag is arranged in the shell body. When the air bag expands or shrinks, the air bag drives the transmission piece to move. When the transmission piece moves, the transmission mechanism is driven to move. When an active piece rotates, a ratchet wheel of the ratchet mechanism is driven to rotate. The magnetic pieces are arranged on the ratchet wheel, and when the ratchet wheel rotates, the magnetic pieces are driven to rotate. The magnetic pieces generate an electromagnetic induction with a coil in the rotating process, and generate an induced current in the coil. According to the oil well downhole power supply device provided by the embodiments of the invention, the cruising ability of the downhole power supply device is effectively improved, and the production cost and operation work load are reduced.

Description

technical field [0001] The present application relates to the technical field of oilfield development, in particular to an oil well downhole power supply device and method. Background technique [0002] In the process of oilfield development, it is necessary to collect various parameter data such as temperature, pressure, flow rate, dynamic liquid level and load in the oil well in real time. In order to collect these parameter data in real time, it is necessary to maintain the continuous operation of the downhole testing equipment, and continuous power supply is an important guarantee for the continuous operation of the downhole testing equipment. Therefore, the power supply of downhole electrical appliances including downhole testing equipment is very important. [0003] In the prior art, it is possible to provide power supply for downhole electrical appliances by connecting cables, but the cable layout costs are high, and the cables are more likely to be damaged in the do...

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Problems solved by technology

[0003] In the prior art, it is possible to provide power supply for downhole electrical appliances by connecting cables, but the cost of laying cables is relatively high, and cables are relatively prone to damage

In the prior art, the downhole battery can also be used to supply power to the downhole testing equipment. However, the downhole battery has limited storage capacity, so the battery life is limited, and it needs to be replaced or charged frequently, which increases the production cost and workload in the test work.

[0004] There are at least the following problems in the prior art: the existing downhole power supply device has low battery life, and in order to ensure the continuous operation of the downhole testing equipment, it is necessary to frequently replace the battery or carry out Charging, increasing production costs and workload

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