CPC E21B 47/047 (2020.05) [E21B 33/12 (2013.01)] | 16 Claims |
1. A device for detecting a downhole oil level, comprising an installation housing and a balance cylinder installed on the installation housing;
wherein the balance cylinder comprises a cylinder body and a moving piston, a piston tension spring, a moving rod, a moving rod compression spring, a displacement sensor, a limiting structure and a clamping structure which are installed in the cylinder body;
one end of the piston tension spring is fixed at one end of the cylinder body, and the other end of the piston tension spring is connected with a first side of the moving piston, the first side of the moving piston is further connected with one end of the moving rod compression spring, the other end of the moving rod compression spring is connected with one end of the moving rod, and the other end of the moving rod is provided with the displacement sensor, the displacement sensor is configured to measure a displacement of the moving piston; and
the other end of the moving rod is provided with the limiting structure, the first side of the moving piston is connected with the clamping structure, and the moving piston is configured to drive the moving rod to move through a cooperation between the clamping structure, the limiting structure and the moving rod compression spring.
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