Drill Stem Testing Select Tester Valve 15000 psi High Pressure Full
H2S Service
Brief of Select Tester Valve
The select tester valve is the full bore tester valve
with lock open mode. The Tester Valve used for downhole
testing operation is operated by the annulus pressure,
which controll to operate the ball valve.
The select tester valve is composed of four basic sections; ball
valve section, upper hydraulic section, nitrogen section and the
metering section.
Specification of the downhole tester valve
| Tool size /in | OD/ mm | ID/ mm | Working pressure / Mpa | Service environment | Working temperature | Connection |
| 5" | 127.5 | 57 | 105 | Mud, Crude Oil, Natural gas with H2S and acid | --29oC ~ +204oC | EUE IF CAS |
Select Tester Valve Function Test Sample:
Time: 12-03-2016 Temperature: 18 ℃
5.1 ( 1st Time )
1) original nitrogen pressure: 19.3Mpa operating pressure: 26.9Mpa
Pressure to Open the Ball valve:24.3Mpa
Ball valve Position: Open
The nitrogen pressure after holding operating pressure for
10minites: 24.2Mpa
The time when nitrogen pressure increases to 26.2MPa (3800psi):
26.2Mpa/20 minutes
2) Operating Pressure when pressure released: 0 MPa position of
ball valve: Closed
The nitrogen pressure after 10minites: 19.3 MPa
The time when nitrogen pressure decrease to 19.3 (2800psi):
19.3Mpa/ 5 minutes
5.2 Locked-open operating mode test( 1st Time)
1) original nitrogen pressure: 19.3 MPa operating pressure: 35 MPa
ball valve open pressure: 25.5 MPa position of ball valve: Open
The nitrogen pressure after holding operating pressure for
10minites: 28.3 MPa
The time when nitrogen pressure increases to 32.4±0.7MPa
(4700psi±100psi): 32Mpa / 15minutes
2) operating pressure after release: 0 MPa position of ball valve:
Open
The nitrogen pressure after holding operating pressure for
10minites: 19.3 MPa
The time when nitrogen pressure releases to 19.3MPa (2800psi):
19.3Mpa/8 Minutes
3) original nitrogen pressure: 19.3 MPa operating pressure: 35 MPa
position of ball valve: Open
The nitrogen pressure after holding operating pressure for
10minites: 29.7 MPa
The time when nitrogen pressure increases to 32.4±0.7MPa
(4700psi±100psi): 32.4Mpa/14Minutes
4) operating pressure after release: 0 MPa position of ball valve:
Closed
The nitrogen pressure after holding operating pressure for
10minites: 19.3 MPa
The time when nitrogen pressure releases to 19.3 MPa (2800psi):
19.3Mpa/ 7 Minutes
All the raw materila used for the DST tools will be test
by SGS at the thrid party testing lab, SGS made the mark and keep
the traceability of each DST tools parts.
The drill stem testing tools are applied in cased hole, open hole
and slim hole, the main DST tool string includes RTTS packer,
circulating valve, safety joint, select tester valve, omni valve,
hydraulic jar, shock absorber, RD safety circulating valve, high
pressure retrievable packer with bypass, IPO valve, tubing string
test valve, and so on.
We approach every client’s enquiry with meticulous attention to
technical specifications, and a high level of appreciation for
their urgency.
Welcome to contact us for more information!!
