Tubing string testing vale drill stem testing from China manufacturer

Tubing string testing vale drill stem testing

Price:	500.0~10000.0 USD
Payment Terms:	T/T
Special Groups:	DST Tools (146)
Place of Origin:	Shaanxi, China (Mainland)


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Product Detail

Model No.: TOP-DST-10

Production Capacity: 8 pcs/month

Delivery Date: 15~30 days

Type: full bore drill stem testin...

service: H2S

Condition: New

Operate: ANNULAR PRESSURE OPERATED

Means of Transport: Ocean

Packing: polywood case

Application: oil well testing

working pressure: 10000psi ~ 15000psi

standard: NACE MR0175

Size: 5"

The tubing string testing (TST) valve is a full-opening valve used to pressure-test the workstring while running in the hole.

TST valve

The tubing string tetsing valve TST valveis operated after it is stung into a permanent packer or a retrievable packer is set. The TST valve requires a differential pressure between the annulus and the tubing to shear. The TST valve can also be used for pip flexing if it is run below an annulus pressure-responsive circulating valve.

In downhole operation, the valve can not be closed after open.

When running in the hole, the tester valve must run in downhole in opening condition, after string testing finished, increasing annulus pressure made the flapper valve open, also can process closing well operation for tester valve(pressure-responsive valve).

The TST valve consists of:

• Flapper valve and spring.

• shear pin section

• locking dogs

Tubing string testing valve TST valve