Detailed Product Description

By Pass Valve is a device installed at the bottom of Multi-flow Evaluator, its main functions are: (1) Drilling fluid can flow through the inner bore of packers mandrel and the hole of By Pass Valve, while testing string meets reducing well section in the course of being pulled out of the hole, that can ensure the testing string being pulled out smoothly; (2) By Pass Valve opens and balances the upper and lower pressures of packer at the end of testing, provide condition to release the packer.

By Pass Valve is controlled by lifting and running string, too. Its time delay valves direction is exactly against the Multi-flow Evaluators, that is extension and time delay by lifting, however, pressurization and not delay by running. By Pass Valve can be opened by applying a tension of 89000N, then provided time delay for 1~4 minutes.