Closing Frac Port FPZ is applied for multistage hydraulic fracturing.
A set of frac ports is RIH as a part of a liner GRP assembly. Each port is installed into
required wellbore zone. Frac ports FPZN is installed in the first hydraulic fracturing zone
(above the shoe, check valves).
FPZN frac port is actuated with pressure build-up to 30 MPa.
FPZ frac ports are actuated through dropping and pumping of balls with different diameter
into a well beginning with the smallest one.
Frac ports are run in as a part of a liner together with swellable and hydro-mechanical
packers;
The outstanding feature of FPZ and FPZN frac ports is a possibility of closing them after
seats drilling out for balls. Closing is done by a collar control tong conveyed on tubing or
coiled tubing KUM.114./by.
Collars can be equipped both with usual metallic balls and balls of soluble composite
material.
| NUMBER | BALLS DIAMETER | COLLAR CODE | |
| mm | inches | ||
| 1 | 70,92 | 2,792 | FPZ*/701 |
| 2 | 67,57 | 2,660 | FPZ*/67 |
| 3 | 64,32 | 2,532 | FPZ*/64 |
| 4 | 61,19 | 2,409 | FPZ*/61 |
| 5 | 58,17 | 2,290 | FPZ*/58 |
| 6 | 55,25 | 2,175 | FPZ*/55 |
| 7 | 52,43 | 2,064 | FPZ*/52 |
| 8 | 49,71 | 1,957 | FPZ*/49 |
| 9 | 47,07 | 1,853 | FPZ*/47 |
1
* means collar diameter.
