LPR N Tester Valve For Cased Hole Drill Stem Testing High Pressure Tester Valve

Introduction of the LPR N Tester Valve

The LPR-N Tester Valve is a kind of full-opening, annulus pressure-operated valve which is applied for downhole testing operation as main tester valve. The LPR N Valves permit measuring multi pleclosed-in pressures in cased holes where pipe manipulation is restricted and afull-opening string is required.

Specification of the LPR N Tester Valve

How to operate the LPR N Tester Valve

The LPR-N tester valve consist of three section, including ball valve section, a power section, and a metering section.

The ball valve section contains the ball valve and related mechanical components that rotate the ball, which provides multiple downhole closures . When the LPR N Tester valve is activated, the ball is rotated to the open position, allowing the reservoir to flow into the test string. Depending on how the tool is assembled, it can be run in the hole in the closed or open position.

The power/nitrogen section contains the shear pins, operating piston, and nitrogen chamber. In the power section, one side of the piston is exposed to annulus pressure, and the other is exposed to pressurized nitrogen.

The metering section of the tool is isolated from the annulus fluid by an oil and floating piston barrier and controls the rate of pressure change in the nitrogen chamber.

When testing is started, pressure will be pumped quickly to the annulus to a predetermined pressure, and hold for 10 minutes to pressurize the nitrogen chamber. After pressure has been metered through the metering cartridge, pressure in the nitrogen chamber will be slightly less than combined hydrostatic and pump pressure in the annulus, which will help to ensure that the ball valve stays open during testing or treating operations.

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.

ZZ Top Oil Tools Co.,Ltd as head office registered in Xi’an City in 2010, and in 2016, ZZ TOP OIL TOOLS enlarged the downhole oil tools factory under the Brand - TECHCORE in Baoji, which engages in designing and manufacturing the downhole oil tools including DST tools, Coiled tubing tools etc.

As one group, ZZ TOP provides the clients highly efficient & expertise service as well as more comprehensive products to meet the customers' requirements during the work, and insists on "Traceability, Serialization" for each tools and related parts

Equipments List

Techcore specialized in design, manufacture and sales of the oil well downhole tools as below:

* Drill stem testing tools for cased hole,  open hole and slim hole:

Retrievable packer, circulating valve,safety joint, downhole tester valve,LPR- N Valve, multi-cycle circulating valve, hydraulic jar, shock absorber, RD safety circulating valve,CHAMP packer, IPO valve, tubing string test valve, drain valve,RD sampler, super safety valve etc.

* Coiled Tubing Tools: Double slip connector, roll on connector, roll on x thread connector, double flapper check valve, motor head, dual function circulating valve, hydraulic jar, fishing tools etc.

* Perforating tools: Various perforator & perforating gun system, Shaped Charge Body

 *Oil well completion tools include: Subsurface safety valve, wireline retrievable subsurface safety valve, single string production packer, dual strings production packer, ESP packer, mechanical set packer, permanent packer, compensation device, bridge plug, sliding sleeve, nipples etc. 

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