DAW SERIES SUBSURFACE SAFETY VALVE
INTRODUCTION
The DAW series is a tubing retrievable surface controlled subsurface safety
valve. Various kinds of new technology are applied in DAW series surface
controlled subsurface safety valves and perform very well in field applications,
reducing significantly common safety valve failures.
DAW series surface controlled subsurface safety valve is with flapper structure to
protect wireline from damages, non-elastomeric sealing technology and
metal-to-metal sealing and containment of wellbore fluids when the valve is in the
closed position.
The DAW Series Safety Valve is designed to operate in fluid and gas
environments in both production or injection applications. An integral part of the
completion string, it is controlled via a hydraulic control line. Application of control
line pressure maintains the Safety Valve in the open position, but when pressure
is bled off the safety valve closes. In the event of uncontrolled flow, this 'failsafe'
closure on command protects property, personnel & the environment. In the
event of malfunction, deployment of Lockout and Control Line Communication
Tools adapt the valve to accept a Wireline.
FEATURES
• Self-equalizing function of flapper
• Non-elastomeric dynamic seal assembly
• Wireline damage resistant flapper - design protects sealing integrity during
wireline operations.
• Metal-to-metal seal technology - 100% metal-to-metal sealing and
containment of wellbore fluids when the valve is in the closed position.
• Optional chemical injection capability - injection mandrel within the TRSV
eliminates the need for a mandrel above the valve and allows injection of
fluids directly into spring cavity for maximum effectiveness.
DAW SERIES SUBSURFACE SAFETY VALVE SPECIFICATIONS
| Size |
Max OD |
Max Seal Bore |
Working Pressure |
Setting Depth |
Max Temp. |
| In. |
in/mm |
in. |
psi |
ft |
m |
ºF |
ºC |
| 2-7/8 |
4.51/114.55 |
2.313 |
5,000 |
1,500 |
457 |
300 |
149 |
| 10,000 |
| 3-1/2 |
5.185/131.7 |
2.813 |
5000 |
1,500 |
457 |
300 |
149 |
| 5.30/134.60 |
2.75 |
| 5.65/143.5 |
2.562 |
10,000 |
| 4-1/2 |
5.985/152 |
3.813 |
8,500 |
2,200 |
670 |
300 |
149 |
| 6.5/165.1 |
3.75 |
5,000 |
1500 |
457 |
| 7.403/188.00 |
3.688 |
10,000 |
| 5-1/2 |
7.73/196.30 |
4.75 |
5,000 |
1500 |
457 |
300 |
149 |
| 8.0/203.2 |
4.562 |
8,000 |
| 8.25/209.60 |
4.313 |
10,000 |
| 7 |
8.375/212.70 |
6.15/6/5.813 |
5,000 |
2000 |
609 |
300 |
149 |
| 9.2/233.60 |
10,000 |
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