Gas Well Downhole Tester Valve High Pressure APR Tools For Drill
Stem Testing
The donwnhole tester valve is used to drill stem testing operation
in oil and gas well. The downhole tester valve we manufactured is
the Halliburton select tester valve, which is a full opening,
annulus pressure operated high pressure tester valves.
Structure of the Downhole Tester Valve
The select tester valve is composed of four basic sections; ball
valve section, upper hydraulic section, nitrogen section and the
metering section.
* The ball valve section contains the ball valve and the mechanism
that rotates the ball when the tool is activated; the ball is
rotated to the open position allowing the reservoir to flow into
the testing string.
* The upper hydraulic section is contained between the upper
annulus ports and the nitrogen filler valve. The critical part of
this section is the metering (power) cartridge and selector.
* The metering section is the metering cartridge that provides the
area that the operating pressure acts over to open the valve. The
metering cartridge has two parallel flow paths through it, Each
path only allows fluid to move in a single direction.
* The nitrogen section is composed of the nitrogen case, nitrogen
mandrel, floating piston and nitrogen filler valve. The nitrogen
acts as an adjustable spring and provides the force needed to close
the ball valve. The nitrogen section is charged at the surface to a
predetermined pressure according to surface temperature, bottom
hole temperature and hydrostatic pressure. These values do not have
to be exact because the floating piston allows the tool to
compensate for small inaccuracies (approximately 10%).
Specification of Downhole tester valve
| NO. | Specification | 5” |
| 1 | OD | 5”(127mm) |
| 2 | ID | 2.25”(57mm) |
| 3 | Length(mm) | 288.2”(7319.5mm) |
| 4 | Working pressure | 15000 PSI(105Mpa) |
| 5 | Maximum open pressure differential | 5000PSI(35Mpa) |
| 6 | Tensile strength(Yield) | 2020.5kN |
| 7 | Internal Pressure Strength | 151Mpa |
| 8 | External Pressure Strength | 141Mpa |
| 9 | Torque strength | 30.9kN.m |
| 10 | Service Environment | Mud, crude oil, natural gas with H2S, Apply to NACE MR0175-2003 |
| 11 | End connection | 3 7/8CAS. BXP, 3 1/2 IF BXP |
| 12 | Service temperature | -20oF~400oF |
Drill stem testing tools for cased hole, open hole and slim hole
are available as below
RTTS Serires: Full bore retrievable packer, full bore retrievable
circulating valve, full bore retrievable safety joint,
Tester Valve: downhole tester valve, select tester valve, LPR- N
Valve, Tubing String Tester Valve
Circulating valve: omni circulating valve, multi-cycle circulating
valve, RD Circulating valve, RD safety Circulating Valve, Hydraulic
Circulating Valve
Other DST string tools: hydraulic jar, vertical shock absorber,
radial shock absorber, RD safety circulating valve, high pressure
retrievable packer with bypass, CHAMP packer, IPO valve, sleeve
type drain valve, rupture disk sampler, super safety valve with
control panel, BOP safety valve for downhole operation and so on.
Techcore Service
Strict quality control system
Techcore oil tools is certified by ISO, all the manufacture is
strictly conformed with ISO system including Quality Control
Management, Environmental Management and Occupational Health &
Safety Management. For each downhole tools and each parts, we make
the trace-ability from the raw material till the products. And any
TPI inspection are available with us from SGS/BV/ TUV /DNV etc..
Continuous after sales service
Techcore provides the prompt after-sales service to our customers
to guarantee your benefits. For the complete downhole tools, we
provide the free training in our factory, and if you need the site
instruction, we can appoint our technical engineer to your site for
the training.
Welcome to contact us for more information of the downhole tools!
