GB/T 43599-2023 in English

GB/T 43599-2023 standard systematically regulates the full life cycle test system of mechanical cementing plugs, focusing on their functional reliability under complex downhole working conditions. The standard innovatively divides the test items into two categories: basic performance (such as 5.1 penetration pressure test) and working condition simulation (such as 5.6 passing ability test).

Take underwater release plugs as an example. Its unique back pressure bearing capacity test requires simulating the 3,000-meter water pressure environment on the seabed. The test device needs to be equipped with a dual pressurization system (upper loading + lower back pressure), which is significantly different from the test of conventional land-based plugs.

Compared with the old version of SY/T 7084, this standard adds 5.3 rollover pressure test and 5.8 compression deformation test, reflecting the industry's attention to the working conditions of abnormal seating and long-term storage of rubber plugs. Notes for implementation:

1. For graded cementing plugs, 5.1 penetration test and 5.6 passing ability test must be performed simultaneously
2. High temperature conditions (＞120℃) test requires the use of synthetic oil medium with a flash point ≥140℃
3. For wear resistance test, the actual string circulation method is preferred instead of the material test method