High Pressure Slim Hole Select Tester Valve LPR N Valve DST 3 7/8"
x 10000 PSI
Brief of 3 7/8" LPR-N Valve
The 3 7/8" LPR - N Valve is a kind of full opening tester valve
used in slim hole drill stem tesing operation.
The LPR-N Valve is annulus pressure-operated tester valve to
measure multiple closed-in pressures where pipe manipulation is
restricted and a full-opening string is required
General LPR-N Valve Operations
As the LPR-N Tester Valve is run into the well, the ball valve of
the tester valve can either set up to be in the open or closed
position. The power section controls the ball valve mechanism. The
power section has a moving piston with one side exposed to
hydrostatic pressure and the other side exposed to pressurized
nitrogen.
After the packer has been set, pressure is applied to the annulus,
moving the piston downward to pull the
ball into the open position. Releasing annulus pressure allows the
pressurized nitrogen to return the
piston upward to close the ball valve.
The nitrogen chamber is charged at the surface to a predetermined
pressure depending upon surface
temperature, bottomhole temperature, and hydrostatic pressure at
testing depth. This charging pressure
gives the tool the optimum volume for compression in the nitrogen
chamber when the tool arrives at
testing depth. These values do not have to be exact because the
floating piston compensates for small
inaccuracies
Specification of the 3 7/8" LPR-N Valve
| Tool Size /in | OD /in | ID /in | Thread Connections | Length / in | Working Pressure /psi |
| 3 7/8 | 3.9 | 1.8 | 2 7/8 CAS | 199.88 | 10,000 |
About Techcore Oil Tools
With the professional Reserch and Development (R&D) department
with skilled engineers whom were committed to the design of
downhole tools for more than ten years, Techcore Oil Tools is able
to design and manufacture the downhole oil tools as per the
customer's requirement. Techcore is equiped with advance equipments
to manufacture the oil downhole tools and its related parts in high
quality.With stable quality and professional service we have won us
very good reputation from world clients
Other related downhole oil tools manufactured by Techcore
* Drill stem testing tools for cased hole, open hole and slim hole:
Full bore retrievable packer, full bore retrievable circulating
valve, full bore retrievable safety joint, downhole tester valve,
select tester valve, LPR- N Valve, omni valve, multi-cycle
circulating valve, hydraulic jar, vertical shock absorber, radial
shock absorber, RD safety circulating valve, high pressure
retrievable packer with bypass, CHAMP packer, IPO valve, tubing
string test valve, sleeve type drain valve, rupture disk sampler,
super safety valve with control panel, BOP safety valve for
downhole operation and so on.
Welcome to contact us for more information about our tools and
service!
