Inside BOP--Check Valve
Drill-tool check Valve
Drill-tool check Valve is a main Blowout prevent tool in drill tool and should be classified into four kinds according to its structure, i.e. arrow back pressure valve (FJ)， Ball check valve (FQ)，Butterfly check valve (FD) and Drop- -in check valve (FT) .
Arrow-Shaped Check Valve
Advantages:
The arrow check valve can meet the normal kill requirement; also provide inner sealing operation condition for some particular operations， such as retrieving tool and drilling as blowout without kill or repairing well.
| Item | Component | Qty | Material | Code |
| 1 | Body | 1 | 8720 | SH- -AS- -xx-xx-01 |
| 2 | Valve Core | 1 | 410 | SH- -AS- -xx-xx-02 |
| 3 | O- Ring | 2 | NBR | SH- -AS- -xx-xx-03 |
| 4 | Seat | 1 | 304 | SH- -AS- -xx-xx-04 |
| 5 | Adapter Body | 1 | 8720 | SH- -AS- -xx-xx-05 |
Drop-In Check Valve
Introduction:
Drop-in check valve，as an important toll to prevent well kick and a BOP inside drilling string,which is dropped into well and prevent well kick and blowout just as necessary, is used to control the inner pressure of drilling rod as running/retrieving drill is forced under well kick or a certain pressure. For it is not connected with drilling rod， it is convenient to execute various drilling operation. | Item | Component | Qty | Material | Code |
| 1 | Adapter Body | 1 | 8720 | SH-DC-xx-xx-01 |
| 2 | Thrust Ring | 1 | 4130 | SH-DC-xx-xx-02 |
| 3 | Valve Core | 1 | 4130 | SH-DC-xx-xx-03 |
| 4 | Seal | 1 | NBR | SH-DC-xx-xx-04 |
| 5 | Slip Insert | 3 | 4130 | SH-DC-xx-xx-05 |
| 6 | Slip | 1 | 4130 | SH-DC-xx-xx-06 |
| 7 | Retainer | 2 | 1045 | SH-DC-xx-xx-07 |
| 8 | Lock Nut | 1 | 4130 | SH-DC-xx-xx-08 |
| 9 | Spring Seat | 1 | 4130 | SH-DC-xx-xx-09 |
| 10 | Spring | 1 | 1566 | SH-DC-xx-xx-10 |
| 11 | Ball | 1 | 304 | SH-DC-xx-xx-11 |
Upper/lower Kelly Cock
Introduction:
Kelly cock valve is a constant-open type blowout protection assembly in drilling tool， as well kick happens， it can be closed and prevent fluid under ground from gushing up through the water hole in drilling column. In well control operation, if hose and high-pressure manifold is damaged, it can be replaced.
| Item | Component | Qty | Material | Code |
| 1 | Handle | 1 | 1045 | SH-KC- -xx-xx-01 |
| 2 | Rotary-block | 1 | 4130 | SH-KC- -xx-xx-02 |
| 3 | O-Ring | 1 | NBR | SH-KC- -xx-xx-03 |
| 4 | Body | 1 | 4130 | SH-KC- -xx-xx-04 |
| 5 | Spring | 8 | 1566 | SH-KC- -xx-xx-05 |
| 6 | Lower Seat | 1 | 410 | SH-KC- -xx-xx-06 |
| 7 | Ball | 1 | 410 | SH-KC- -xx-xx-07 |
| 8 | L ower Retainer | 1 | 410 | SH-KC- -xx-xx-08 |
| 9 | O-Ring | 1 | NBR | SH-KC- -xx-xx-09 |
| 10 | Upper Seat | 1 | 410 | SH-KC- -xx-xx-10 |
| 11 | Upper Retainer | 1 | 4130 | SH-KC- -xx-xx-11 |
| 12 | Retainer | 1 | 410 | SH-KC- -xx-xx-12 |
| 13 | Circlip | 1 | 1566 | SH-KC- -xx-xx-13 |
