Manifold
Choke manifold:
1. Application
Choke manifold is necessary device to control the well kick successfully and execute the pressure control technology on oil/gas well in the course of drilling , it can control the finite pressure from casing by adjusting the choke valve' s opening,so balanced drilling can work under minimum pressure-difference.
2. Assembly & structure
Choke manifold consists of choke valve,gate valve，pipeline, fittings and pressure gauge etc., see gate valve part and choke valve part in the above drawing .
3. Working principle
When the pressure rising in well. fluid in well can be released in utilization of the choke valve opening/closing in choke manifold to control casing pressure,which can directly blow out through gate valve as the casing pressure is quite high.
4. Specification
Pressure level is divided into five levels,i. e.14MPa. 21MPa, 35MPa. 70MPa and 105MPa, it can be also designed according to the requirement of customer .
5. Operation requirement
(1) All the working pressures of parts in choke manifold should be matched with the working pressure of the BOP stack used ;
(2) Choke manifold should be installed at the place where operator approach it conveniently ,pressure test should be executed as installation,while the sealing test pressure should be equal to the rated working pressure;
(3) Pipeline should be so smooth and straight as possible, the corner of the pipeline should be made of 120°haped forged steel bent pipe,which should have adequately large bore;
(4) The working pressure gauge should be installed;
(5) In winter, the choke manifold be able to work under a low temp condition .
| Item | Component | Qty | Material |
| 1 | Skid Base | 1 | |
| 2 | Hydraulic Choke | 2 | |
| 3 | Five--way Piece | 1 | 4130 |
| 4 | Gate Valve | 1 | |
| 5 | Pressure Gauge | 1 | |
| 6 | Needle Valve | 1 | |
| 7 | Companion Flange | 1 | 4130 |
| 8 | Gate Valve | 10 | |
| 9 | Spacer Spool | 2 | |
| 10 | Cross | 5 | 4130 |
| 11 | Blind Flange | 7 | 4130 |
| 12 | Spacer Spool | 1 | |
| 13 | Gate Valve | 2 | |
| 14 | Manual Choke | 1 | |
Kill Manifold:
1. Application
In case of increase of the well head pressure, the kill manifold can provide a means of pumping heavy drilling fluid into the well to balance bottom hole pressure so that well kick and blowout can be prevented.The check valves on the kill manifold only allow injection of kill fluid or other fluids into the well bore through themselves. but do not allow any backflow so as to perform the kill operation or other operations .
2. Operating Requirements
(1) Working pressure of all pipelines，gate valves and check valves shall be compatible with that of the BOP stack used.
(2) The kill manifold is not intended to be used as common lines for pouring drilling fluid.
| Item | Component | Qty | Material |
| 1 | Skid Base | 1 | |
| 2 | Union Flange | 2 | 4130 |
| 3 | Check Valve | 2 | |
| 4 | Blind Flange | 2 | 4130 |
| 5 | Gate Valve | 2 | |
| 6 | Gate Valve | 2 | |
| 7 | Gate Valve | 1 | |
| 8 | Pressure Gauge | 1 | |
| 9 | Needle Valve | 1 | |
| 10 | Companion Flange | 1 | 4130 |
| 11 | Five-way Piece | 1 | 4130 |
