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XI'AN ZZ TOP OIL TOOLS CO.,LTD
XI'AN ZZ TOP OIL TOOLS CO.,LTD

China SCSSV downhole safety valve controled by remote control manufacturer

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SCSSV downhole safety valve controled by remote control 

Price: 9000.0 USD 
Payment Terms: T/T,L/C 
Special Groups: Case hole DST (111)
DST Super safety valve (9)
drill stem testing (124)
Open Hole DST (53)
super safety valve (7)
Place of Origin: Shaanxi, China (Mainland) 
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Product Detail

Model No.: Super safety valve-8"
Production Capacity: 1set/month
Delivery Date: 90days
Working temperature: 400F
Material: Inconel
Size: 8"
Operation: Remote control
Means of Transport: Ocean,Land,Air
Packing: plywood
Working pressure: 105Mpa
H2s: As per NACE MR0175
Type: Surface control
Condition: Stock/unused
ID: 3"

The SSV is master valve for downhole testing with OD8",15000PSI working pressure, Material in Inconel, capable of cutting wireline,coiled tubing.

Subsurface control downhole safety valve Inconel

SCSSV downhole safety valve controled by remote control


OPERATIONS GUIDELINES

 Typically, the nitrogen charge chamber of the valve is charged with nitrogen to 1000 to 1500 psi. This charge is sufficient to cut 7/32 inch monoconductor cable, but it is not adequate to cut coiled tubing.  The valve can

 be charged with nitrogen sufficient to cut coiled tubing, but this raises the required hold open pressure.  The tool is 

capable of cutting 1.50 inch OD x 0.125 inch wall thickness coiled tubing by application of balance line pressure. The 

hold open pressure varies with well conditions; however, it is roughly 2.5 times the nitrogen charge pressure. 

 All lines on the valve will hold 10000 psi, but a differential pressure between the control and balance line should not 

exceed 3000 psi under normal circumstances (control line being higher).  This prevents the application of excessive 

stress to the ball.  (10000 psi in the balance line with no control line pressure is within operational limits.)

Typically, the valve is run into the BOP where the valve controls the tubing area while the BOP pipe ram seals off the 

annulus.

The valve is controlled by three hydraulic lines, one to each of the following:

• Control Chamber

• Balance Chamber (Nitrogen Chamber)

• Chemical Injection Port

Generally, the balance line does not have pressure applied to it, therefore the floating check valve remains on seat.  

However, the balance line can be used for additional closing force if required.  The nitrogen charge and spring force

 will cut 7/32 inch mono conductor cable or coiled tubing and close the ball valve provided the nitrogen chamber was

 charged to the appropriate pressure

The control line is pressurized to hold the ball valve open.  The pressure required can be determined by using Table A,

 but generally two times the nitrogen dome charge pressure plus 500 psi for lower pressures and temperatures is 

sufficient. There is little hydrostatic pressure and no requirement for cutting coiled tubing in most normal operations,

 therefore a nitrogen charge of 1000 - 1500 psi is usually sufficient. 

 (The check valve should be coined in with around 2000 psi when it is new so that it can hold lower pressures more

 reliably.)

The chemical injection line is rated for 15000 psi and can be used for chemical injection downhole or to control a 

subsurface safety valve.  The chemical injection line is an independent line that is not affected by the ball valve being

open or closed.

 

MAIN PARAMETERS

 

No

Specification

8"

1

O.D.

203.2mm

2

Bore Diameter

76.5mm

3

Length

2855.5mm

4

Working pressure

103.5Mpa

5

Internal pressure strength

178.3Mpa

6

External pressure strength

257.8Mpa

7

Tensile strength

6299KN

8

Torque strength

137.6KN.m

9

Service

H2S,NACE MR0175

10

Working temperature

-29oC+204oC

11

Connection thread

5 3/4-4AS.B 5"-4ACME.B

Remote Control System

The main function of such system is to control the downhole safety valve in case of emergency situation to shut off 

the safety valve.

The system contains Three loop, one loop(1) connects with control line in safety valve,one loop(2) connects with balance line, and rest loop(3) connect with a fusible plug

In case of fire, the temperature on site over 210F, the fusible plug melt, control line loop cut off, the pressure in 

system released, push the ball valve in safety valve closed to prevent well in safety situation.

Or if other unexpected happen need to close the well, just pull off the handle of emergency shut down valve, the 

hydraulic oil will push safety valve piston forward up, the ball valve will be closed by spring, to prevent the well

Or when do coiled tubing testing, extra force need to be added to shut down safety valve ball valve, the loop 2 will in 

work.

There are other option's operation for such system depended on the purpose of testing.

 

Subsurface control downhole safety valve Inconel

SCSSV downhole safety valve controled by remote control


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skype Mr. Dongwa

Tel: 86-29-81779342
Fax: 86-29-81543379
Mobile: 136 5925 3658
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Company Info

XI'AN ZZ TOP OIL TOOLS CO.,LTD [China (Mainland)]


Business Type:Manufacturer, Distributor/Wholesaler, Service
City: Xi'an
Province/State: Shaanxi
Country/Region: China (Mainland)

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