Advantages
It can realize special operations such as plugging without tripping out, shorten drilling cycle and reduce well control risk;
The bypass valve automatically closes when the pump stops, reducing the possible U-tube effect or well control problems;
It is not limited by downhole tools, instruments and bit waterholes, and can realize large displacement well flushing;
Effectively remove cuttings bed in directional and horizontal well sections;
Multiple downhole switching operations can be realized, and our products can be switched 6 times.
Application fields
1) High concentration and large particle plugging materials and cement squeezing plugging construction shall be carried out without tripping out;
2) Special construction of pumping other corrosive liquids;
3) High displacement well flushing in directional wells, horizontal wells and highly deviated wells;
4) Clean casing and BOP stack;
Basic structure
The multiple activation bypass valve is mainly composed of three parts: by-pass nipple, ball blue nipple and switch ball set. A switch ball group comprises an activation ball, two closing balls and a locking ball. The activation ball and locking ball are made of a new type of engineering plastics, and the closed ball is made of standard bearing steel ball.
| Size(in) | 4 3/4" | 6 1/4" | 6 1/2" | 6 3/4" | 8" | 8 1/4" | 9 1/2" |
| O.D.(mm) | 121 | 159 | 165 | 172 | 203 | 210 | 241 |
| I.D.(mm) | 30 | 30 | 30 | 30 | 38 | 38 | 38 |
| Connection | NC38 | NC46 | NX50 | NC50 | 6 5/8 REG | 6 5/8 REG | 7 5/8 REG |
| Diameter of by-pass port(mm) | 28.2 | 28.2 | 28.2 | 28.2 | 34.35 | 34.35 | 34.35 |
| Amount of by-pass port | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Diameter of avtivationball(mm) | 38.1 | 50.8 | 50.8 | 50.8 | 63.5 | 63.5 | 63.5 |
| Amount of activation ball | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Diameter of locking ball(mm) | 28.6 | 28.6 | 28.6 | 28.6 | 35 | 35 | 35 |
| Amount of locking ball | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Diameter of closing ball(mm) | 35 | 35 | 35 | 35 | 44.45 | 44.45 | 44.45 |
| Amount of closing ball | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Switching times | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Total length(mm) | 2033 | 2586 | 26.6 | 2586 | 2803 | 2803 | 2817 |
| Total weight(kg) | 124 | 292 | 308 | 345 | 514 | 565 | 791 |
| Makeup Torque(KN-m) | 13.5 | 30.4 | 40.2 | 43.8 | 62.9 | 62.9 | 107.8 |
