Constant-pressure Drainage Device

Category:

Constant-pressure drain

Keywords:

The constant-pressure drain device shares essentially the same structure, operating principle, and usage method as the conventional baffle-type oil drain器—except that hydraulic pressure is applied directly into the tubing. This system pressure acts on a metal constant-pressure disc installed in the radial port of the drain device. When the pressure difference across the metal disc reaches a preset value, the disc ruptures and detaches, creating an oil-drainage and fluid-discharge hole that leads to the annulus between the tubing and casing. The core technology lies in replacing the traditional copper baffle of the conventional baffle-type oil drainer with a new type of constant-pressure disc used in the constant-pressure drain device. This innovative disc technology ensures that the opening pressure of the drain device is both precise and highly reliable.

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Detailed description

How it works
The constant-pressure drain device shares essentially the same structure, operating principle, and usage method as the conventional baffle-type oil drain. The key difference lies in the method of applying hydraulic pressure directly into the tubing: system pressure acts on a metal constant-pressure disc installed within the radial holes of the drain device. When the pressure differential across the metal disc reaches a preset value, the disc ruptures and detaches, instantly creating an oil-drainage and fluid-discharge port that connects to the annulus between the tubing and casing. At the heart of this technology is the innovative constant-pressure disc used in the drain device—replacing the traditional copper baffle found in standard baffle-type oil drains. This advanced disc technology ensures that the opening pressure of the constant-pressure drain device is both precise and highly reliable.

Main structural parameters
1. Total tool length: 215 mm
2. Inner diameter: Ø60mm
3. Maximum outer diameter: Ø99mm
4. Both-end threaded connections: 2-7/8″ TBG

Application Cases