Drill Stem Testing Tools APR Downhole Tester Valve Select Tester
Valve
Structure of 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 composed of the lower oil chamber, metering
cartridge and floating piston. The oil in this section acts as a
barrier between the tool and the annular fluid. This insures that
only clean fluid passes through the metering cartridge. The
metering cartridge 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 first flow path contains a check valve.
This path allows oil unrestricted flow into the upper oil chamber
from lower oil chamber. The second path contains a pressure relief
valve and a time-delay valve. This path only allows fluid to move
into the lower oil chamber from upper oil chamber slowly when the
pressure relief valve open.
* The selector provides the means to close the valve. The selector
aligns a set of lugs that transmit the forces generated by a
operating piston and the trapped nitrogen pressure into the
operating mandrel to close the valve. The selector sleeve has a
path machined into it that maintains the alignment of the lugs on
the sleeve and the splines in the operating connector. The
operating connector is attached to the operating piston through a
thread connection.
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.
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 | Connection | CAS Box x Pin, IF Box x Pin |
| 12 | Service temperature | -20oF~400oF |
Techcore Service
Techcore Oil Tools expertise in manufacture of the downhole oil
tools for more than Ten years, the professional Reserch and
Development (R&D) department improves the advanced technology
in design of the Drill stem testing tools for well testing service,
coiled tubing tools for CT operation.
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.
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!
