Oilfield Downhole Mechnical Tester Valve High Pressure Tester Valve
Introudction of Mechanical tester Valve
Mechanical tester valves are the kind of the downhole tester valve
is opening and closing the well by lifting and lowering the drill
pipe or tubing to
control the ball valve of the tester valve. The tester valve is
closed while the tool is running in hole. When the tool reached the
predetermined depth,
J-slot mandrel will move up and down by applying the weight of
workstring, and the transposition lug can rotate freely, then it
will move along the
travel of index groove. The workstring is lifted or set down one
time, the position of J-slot mandrel will change one time, like
this, the ball valve can
be opened and closed finally. Above movement can be repeated many
times as required.
Specification of the Mechanical Tester Valve
| NO. | Specifications | 5″ |
| 1 | OD | 127.5mm |
| 2 | ID | 57mm |
| 3 | Length | 2991mm |
| 4 | Bottom and Top Differential of Ball Valve | 70MPa |
| 5 | Working pressure | 103.5MPa |
| 6 | Burst Strength | 140MPa |
| 7 | Collapse Strength | 130MPa |
| 8 | Tensile Strength | 2203KN |
| 9 | Torque Strength | 24.6KN.m |
| 10 | Shear Value | 3.5Mpa/per |
| 12 | Service Environment | NACE-0175 Sour Gas Service(>175°F) |
| 13 | Working Temperature | -29℃～+204℃ |
| 14 | Connections Type | 3 7/8″CAS.B×P 3 1/2″IF.B×P |
Structure Features and Working Principle
Mechanical tester valve is composed of three major section: a
inversion mechanism, a time-delay mechanism and a ball valve
section. As shown
on the index groove sketch map, the location marked with numbers is
the travel line of transposition lug when lifting and setting down
workstring
every time.The inversion mechanism consists of a J-slot mandrel and
a transposition lug. There are many index grooves on the J-slot
mandrel. A
pair lugs of transposition lug is inserted into the index groove.
When the workstring is setting down, the tool will be compressed,
then the J-slot
mandrel will move upward, the transposition lug moves to the
position 3, which is called locking position. At this time, the
ball valve is closed and
circulating port is closed too.
About Techcore Oil Tools
Techcore Oil Tools expertise in manufacture of the Drill Stem
Testing 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.
Techcore designs and chooses the raw material of DST tools
according to the customers' oil well condition, and make all our
effort to supply the cost effective well testing tools to satisfy
the customer, and improve the test tools to meet the industry’s
demand for ultra-high pressure and temperature downhole operation.
* Techcore insist on superior quality, strong packing & timely
delivery.
*Third party inspection is available from SGS, BV, DNV etc.
* Techcore do the best to supply thoughtful and prompt after-sales
service to guarantee for the customers' benefits
* Techcore supply the cost effect products with 12 months guarantee
* Techcore insist on the traceability of each Drill stem testing
tools and related DST parts
from the raw material to the finished products to meet on
requirements of onshore and offshore standards.
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.
