Reverse Circulating Valve
Definition - What does Reverse Circulating Valve mean?
A Reverse Circulating Valve is a downhole device that enables circulation from the annulus to the tubing string during the reverse circulation process so as to remove debris from a wellbore. The high fluid flow rate inside the tubing string enables the removal of large or dense debris particles that are usually difficult to remove. The valve also provides a positive double barrier that protects the tubing string.
Petropedia explains Reverse Circulating Valve
Reverse circulation is only possible in a cased hole and the reverse circulation valve is designed to communicate between the annulus and the internal diameter of the tubing. The design of the reverse circulation valve is simple and enables quick reverse circulation of drilling mud, brine or any other fluid. Some of the benefits of reverse circulation valve are as follows:
- It keeps the flow path maintained and lets the bottom hole assembly components work smoothly.
- It helps in cleaning out properly because of reverse circulation of drilling mud and brine.
The following are some of the types of reverse circulation valves used:
- Annulus reclosable circulating valve
- Single shot reversing valve
- Multicycle valve