lpr-n tester valve funcionamiento 1

ISection

1 LPR™ N Tester Valve

1.1 DescriptionThe LPR™ N Tester Valve is a full-opening, annulus pressure-operated valve. It permitsmeasuring multiple closed-in pressures in cased holes where pipe manipulation isrestricted and a full-opening string is required.

The nitrogen chamber is charged at the surface to a selected pressure determined bysurface temperature and bottomhole temperature and pressure.

If the intended test requires a permanent packer that uses a stinger mandrel or seal nipple,a variety of Halliburton bypass tools are available, depending on field application, to helpensure that the formations and downhole equipment are protected from excessive pressurebuildup.

1.2 Features and Benefits• The ball valve operates independently of internal pressure changes, like with acidizing

or fracturing operations.

• Drastic temperature changes, like in acidizing operations, have little affect on the tool.

• Advanced materials and processes provide a unique metal-to-metal seal forexceptional gas-holding capabilities.

• The valve has been through an extensive 5-day qualification testing at 400°F and15,000-psi burst and collapse pressures.

• An open-in feature allows the operator to run the valve in the hole with the ball valveopened or closed.

• A double nitrogen chamber can be added to the valve for use in deep, hot, high-pressure wells to reduce the operating pressure.

January 23, 2002 LPR™N Tester Valve I-1

Cased Hole Maintenance Manual Design Specifications

1.3 Design SpecificationsThe design specifications for the 3-in, 3 7/8-in., 5-in. and 7-in. LPR™ N Tester Valves areas follows:

* The tensile strength value is calculated with new tool conditions. Stress area calculations are usedto calculate tensile strength.

** Pressure rating is defined as differential pressure at the tool. (Differential pressure is thedifference in pressure between the casing annulus and tool ID.)

These ratings are guidelines only. For more information, consult your local Halliburtonrepresentative.

3-in. LPR™ N Tester Valve (615.41990)

OD 3.06 in. (7.77 cm)

ID 1.12 in. (2.85 cm)

End Connections 2 1/4 CAS

Makeup Length 172.11 in. (437.16 cm)

Tensile Rating* 160,000 lb (72 570 kg)

Working Pressure** 10,000 psi (687.47 bar)

3 7/8-in. LPR™ N Tester Valve (615.417 / 100065599)

OD 3.90 in. (9.91 cm)

ID 1.80 in. (4.57 cm)



Tensile Rating* 219,000 lb (99,000 kg)



Cased Hole Maintenance Manual Design Specifications

* The tensile strength value is calculated with new tool conditions. Stress area calculations are usedto calculate tensile strength.

** Pressure rating is defined as differential pressure at the tool. (Differential pressure is thedifference in pressure between the casing annulus and tool ID.)

These ratings are guidelines only. For more information, consult your local Halliburtonrepresentative.

5-in. LPR™ N Tester Valve (615.41950 / 100065648)

OD 5.03 in. (12.78 cm)

ID 2.25 in. (5.72 cm)





7-in. LPR™ N Tester Valve (615.43 / 101012763)

OD 7.00 in. (17.78 cm)

ID 3.50 in. (8.89 cm)






Cased Hole Maintenance Manual LPR™ N Operational Guidelines

1.4 LPR™ N Operational Guidelines

1.4.1 DescriptionThe LPR™ N Tester Valve is a full-opening annulus pressure-operated valve. It acts as thedownhole master valve and allows multiple closed-in pressures to be taken in cased holeswhere a full-opening test string is required.

The tool is composed of three basic sections:

• Ball Valve Section

• Power/Nitrogen Section

• Metering Section

The ball valve section contains the ball valve and related mechanical components thatrotate the ball. When the tool is activated, the ball is rotated to the open position, allowingthe reservoir to flow into the test string. Depending on how the tool is assembled, it can berun in the hole in the closed or open position. If the tool is set up to run in the hole in theopen position, the first time pressure is applied and released the tool will shift back intothe normal operating mode. In the normal mode, the ball will open when annulus pressureis applied and will close when the pressure is released.

The power/nitrogen section contains the shear pins, operating piston, and nitrogenchamber. In the power section, one side of the piston is exposed to annulus pressure, andthe other is exposed to pressurized nitrogen, which acts as a large gaseous spring. After thepacker is set, when annulus pump pressure is applied or released, a differential pressure iscreated across the operating piston, causing movement. This movement is transferred tothe ball valve section to rotate the ball open or closed. Initial movement is constrained bythe shear pins installed in the section.

The metering section of the tool is isolated from the annulus fluid by an oil and floatingpiston barrier. The metering section controls the rate of pressure change in the nitrogenchamber when annulus pressure is increased or decreased. This creates the differentialpressure required by the power section to open and close the ball valve.



LPR™ N HydraulicsThe basic operation of the tool is similar to a hydraulic cylinder as shown in the LPR NOperating System graphic. The hydraulic cylinder has two lines connected to it. Thecontrol line on the left is connected directly to the annulus pressure. The other line is alsoconnected to the annulus via the nitrogen chamber and a hydraulic representation of themetering cartridge consisting of an upper and lower flow path out of the nitrogen chamber.

In the above figure, applied annulus pressure has two possible flow paths into the cylinder.Flow can enter the cylinder directly on the top side of the piston, and it can enter throughthe lower flow path and into the cylinder via the nitrogen chamber. Flow entering the toolthrough the lower flow path is delayed by the orifice in the metering cartridge. This allowsthe pressure to build up on the top side of the piston. This pressure, acting on the piston,generates the required force to open the ball valve. Once the operating mechanism hasshifted down, the applied annulus pressure is stored in the nitrogen chamber.

When the applied annulus pressure is released, there are two possible flow paths for thestored pressure in the cylinder. Flow can exit the cylinder directly out the path on the left,by moving the piston up, and it can exit via the metering cartridge. Flow exiting throughthe upper flow path in the metering cartridge is delayed by the orifice. This allows thetrapped pressure in the nitrogen chamber to act on the bottom side of the piston, moving itback to its original position. Once the cylinder has shifted, excess pressure trapped in thenitrogen chamber is slowly released.

The pressure relief valves shown in the hydraulic representation of the metering cartridgehelp keep the tool from shifting with small pressure fluctuations in the annulus.



The tables on the following pages illustrate the affect of the pressure relief valves on thetool during a normal operation.

Note For the example below, the hydrostatic pressure = 10,000 psi, operating pressure =1,300 psi, and the tool is equipped with the acid metering cartridge with 400 psi pressurerelief valves going into the nitrogen chamber, and 80 psi pressure relief valves coming outof the nitrogen chamber.

Acid Cartridge

N2ChamberPressure

AnnulusPressure

Comments

9,600 psi 10,000 psi Tools at testing depth. Note that the nitrogen pressure is less than the annuluspressure because of the metering cartridge. The shear pins prevent the tool fromopening prematurely.

9,600 psi 11,300 psi Operating pressure is applied. Due to the pressure relief valves in the meteringcartridge, the transfer of this pressure into the N2 chamber is delayed. Note thedifferential pressure to open is 11,300 – 9,600 = 1,700 psi.

10,900 psi 11,300 psi After 10 minutes, the N2 chamber should equalize to 10,900 psi. This pressure isstill less than the annulus pressure. This ensures the ball stays open.

10,900 psi 10,000 psi Annulus pressure is released to close the ball. Due to the pressure relief valves inthe metering cartridge, higher pressure is trapped in the N2 chamber. This providesthe force to close the ball valve. Note the differential pressure to close is10,900 – 10,000 = 900 psi.

Minimum 10-minute Wait for N2 Chamber to Equalize

10,080 psi 10,000 psi Note higher pressure in N2 chamber as a result of the pressure relief valves in themetering cartridge. This will keep the ball valve closed.

10,080 psi 11,300 psi Operating pressure applied. Differential pressure required to open the ball valve is1,220 psi.



Note For the example below, the hydrostatic pressure = 10,000 psi, operating pressure =1,300 psi, and the tool is equipped with the standard metering cartridge with 400 psipressure relief valves in both directions.

As shown in the tables, the pressure relief valves assist in preventing the ball valve fromchanging positions due to slight fluctuations in annulus pressure. In these examples, boththe acid and standard cartridges were used. The standard cartridge has 400-psi pressurerelief valves for flow going in and coming out of the nitrogen chamber. A high-pressurecartridge with a slower metering rate is also available. See "Metering Cartridge PressureRange" later in this section for correct part numbers. The acid cartridge is recommendedfor normal operations and should always be used whenever a cold stimulation fluid will bepumped during the job. This cartridge helps prevent the tool from prematurely closingduring the flow back. The high-pressure cartridge is for higher hydrostatics. The standardcartridge was the one originally developed for the tool, but experience has shown that ithas less utility than the acid cartridge.

Note See "Metering Cartridge Pressure Range" for correct usage.

Acid Cartridge

N2ChamberPressure

AnnulusPressure

Comments

9,600 psi 10,000 psi Tools at testing depth. Note that the nitrogen pressure is less than the annuluspressure because of the metering cartridge. The shear pins prevent the tool fromopening prematurely.

9,600 psi 11,300 psi Operating pressure is applied. Due to the pressure relief valves in the meteringcartridge, the transfer of this pressure into the N2 chamber is delayed. Note thedifferential pressure to open is 11,300 – 9,600 = 1,700 psi.

Minimum 10-minute Wait for the N2 Chamber to Equalize

10,900 psi 11,300 psi After 10 minutes, the N2 chamber should equalize to 10,900 psi. This pressure is stillless than the annulus pressure. This makes certain the ball stays open.

10,900 psi 10,000 psi Annulus pressure is released to close the ball. Due to the pressure relief valves inthe metering cartridge, higher pressure is trapped in the N2 chamber. This providesthe force to close the ball valve. Note the differential pressure to close is10,900 – 10,000 = 900 psi.

Minimum 10-minute Wait for the N2 Chamber to Equalize

10,400 psi 10,000 psi Note higher pressure in the N2 chamber is a result of the pressure relief valves in themetering cartridge. This will keep the ball valve closed.

10,400 psi 11,300 psi Operating pressure is applied. Differential pressure to open the ball valve is 900 psi.



General LPR™ N OperationsAs the LPR™ N Tester Valve is run into the well, the ball valve can either set up to be inthe open or closed position. The power section controls the ball valve mechanism. Thepower section has a moving piston with one side exposed to hydrostatic pressure and theother side exposed to pressurized nitrogen. After the packer has been set, pressure isapplied 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 toclose the ball valve.

The nitrogen chamber is charged at the surface to a predetermined pressure dependingupon surface temperature, bottomhole temperature, and hydrostatic pressure at testingdepth. This charging pressure gives the tool the optimum volume for compression in thenitrogen chamber when the tool arrives at testing depth. These values do not have to beexact because the floating piston compensates for small inaccuracies (less than ± 10%).

Note See the Charging and Operating Pressure Tables in Chapter 2 for the correctmethod to calculate these pressures.

Annulus pressure is transmitted to the nitrogen chamber through the oil chamber andmetering cartridge. As the tool is run in the hole, pressure enters the tool through the lowerannulus ports below the oil chamber. When the tool reaches the desired testing depth, therewill be less pressure in the nitrogen chamber than in the annulus. This creates a pressuredifferential across the operating piston, which is acting to open the ball valve. For thisreason, shear pins are needed to keep the ball valve in the closed position until ready totest. The shear pins in the 5-in. tool have an approximate rating of 280 psi/pin. Normallythe tool is set up with four pins.

The total shear value of four pins is 1,120 psi. Once at depth, there will be 400 psi less inthe nitrogen chamber than in the annulus. With four pins in the tool, the pins will shear atapproximately 720 psi differential. We recommend that no fewer than three pins be used inthis tool. (The exception to this shear pin recommendation will be covered in "LowHydrostatic Operations.")

Note See "Metering Cartridge Pressure Range" later in this section for moreinformation on the other tool sizes.

After the packer is set and pump pressure is applied to the annulus, differential pressureacting across the operating piston becomes great enough to overcome the shear pins andopen the ball valve. The first time the tool is activated, the ball valve will open withapproximately 800 psi surface applied pressure. However, it is necessary to increase theannulus pressure to the final operating pressure, and hold for 10 minutes to ensure the



nitrogen chamber is pressurized. After the pressure has metered through the meteringcartridge, the pressure in the nitrogen chamber will still be less than the annulus pressureat this point. This will hold the ball valve in the open position.

Note The operating pressure should be applied/released at a safe maximum rate in 30 to60 seconds.

To close the ball valve, the annulus pressure is released at a safe maximum rate. Thiscreates a differential across the operating piston due to the stored pressure in the nitrogenchamber. The differential pressure moves the operating piston upward, rotating the ball tothe closed position. After approximately 10 minutes, the nitrogen pressure has dropped toa level slightly higher than annulus hydrostatic, helping keep the ball in the closedposition.

Operations With The OMNI Circulating ValveThe basic operating pressure for both the OMNI and the LPR™ N are the same. Themost important difference between the operating characteristics of the LPR N and OMNI is that the LPR N requires a 10-minute minimum waiting period before changing thepressure state of the annulus. When the OMNI has shifted to the blank or circulatingpositions, the waiting period can be decreased to as little as 1 minute, depending onconditions, to operate the OMNI. The closed ball valve in the OMNI in the blank andcirculating positions makes the actions of the ball valve in the LPR N redundant duringthis time.

Note In the 1 1/2 position on the OMNI, prior to entering the well testing section of theratchet path, wait a full 10 minutes before pressuring up the annulus to shift the tool to thewell test position. This will give the metering section in the LPR N time to reachequilibrium. Otherwise, the LPR N may not be capable of being fully closed.

Low Hydrostatic Operations For LPR NsWith hydrostatic pressures of less than 2,000 psi, normal operating pressures will not trapenough energy in the nitrogen section to reliably operate the ball valve. Consequently,successful tool operation can be best be accomplished by running the tool in anovercharged condition. Overcharging the tool ensures that there is sufficient energy toovercome internal friction in the tool as well as environmental elements that could impairtool operation when it is closing.

Nitrogen ChargeCommonly, the 500 psi Overcharge Tables (Chapter 2) will be used to select theappropriate nitrogen pressure for the tool. In some cases, more energy may be required toclose the ball valve, and in those cases the 1,000 psi Overcharge Tables (Chapter 2) can beused to select the nitrogen charge pressure. Operating Pressure Tables (Chapter 2) for bothovercharge situations and the various sizes of LPR Ns are provided.


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Mechanical ModificationIn addition to increasing the nitrogen charge in the tool, certain mechanical modificationshave to be made to prepare the tool for low hydrostatic operations. The metering functionof the hydraulic section of the LPR™ N must be disabled. The simplest way to disable thehydraulic section is to plug the lower operating ports. In addition, the LPR N must be runwithout shear pins. The presence of shear pins in an overcharged tool will dramaticallyincrease the initial opening pressure of the tool. Shear pins are not required because thenitrogen chamber pressure is greater than the hydrostatic pressure.

Control Line OperationSometimes circumstances require that pressure to operate the LPR N be transmittedthrough a control line rather than through the annulus. In such cases the tool should be setup for low hydrostatic operation. If the control-line hydrostatic will be greater than 2,000psi, contact the Test Tools Team at the DFW Technology Center.

Stimulation or Injection and Overcharged LPR NsIn all cases when stimulation is planned using overcharged LPR Ns, contact the Test ToolsTeam at the DFW Technology Center for guidance.

1.4.2 Pre-Job PreparationThere are several areas in the LPR N that should be checked prior to running in the hole.

1.4.2.1. Make certain that new shear pins have been installed.

1.4.2.2. Check the nitrogen pressure with a calibrated gauge to ensure that no leakagehas developed. See General Maintenance Standards for correct nitrogencharging instructions.

1.4.2.3. Check the oil level in the metering section and refill if necessary. The lowerfloating piston should be in the lowest possible position, it will be visiblethrough the lower operating ports.

1.4.2.4. Check to see if the ball valve is in the correct position (open/closed) for the job.

1.4.2.5. When the bottomhole pressure is greater than 10,000 psi, and/or the bottomholetemperature is greater than 275o F, or on gas wells, the long seat ball valveshould be used.

• 616.01299 - Ball and Seat - SG - 5-in. OMNI™

• 616.01295 - Retainer - Lower Seat - w/3/16 O-ring - 5-in. OMNI


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1.4.3 Operational IssuesMany operational issues associated with the LPR™ N Tester Valve relate directly tounderstanding the metering cartridge function. Some operational issues are related to theoperation of the ball valve. The following matters must be considered when planning a jobwith the tester valve and while the tool is in the hole.

1.4.3.1. Annulus pressure must be applied in 30 to 60 seconds. Failure to apply pressurein this time interval will reduce the differential across the operation piston andmay result in difficulty opening the ball in circumstances such as highdifferentials across the ball valve. Applying pressure more quickly may result inover-running the target pressure, which may affect other tools in the string.

1.4.3.2. Annulus pressure applied to open the ball valve and keep it open during flowperiods may deviate +100/-200 psi before being returned to the calculatedoperating pressure. Pressure increase does not affect the position of the ballvalve but may eventually reach a range that can affect other tools. Pressurereductions greater than 200 psi at less than 10-minute intervals may affect theposition of the ball valve. If annulus pressure is allowed to rise too high,returning to the calculated operating pressure in ≥200 psi increments will betime-consuming and tedious.

1.4.3.3. The application or release of operating pressure should not take place at lessthan 10-minute intervals, or the full closing/opening pressure may not beavailable, which can interfere with successful tool operation. There are twoexceptions to this rule.

• When the operating conditions have been modeled in the Halliburton ToolSimulator and the metering cartridge is shown to stabilize in less than 10minutes, the stabilization time shown in the simulator can be used.

• When the tool has been overcharged, the metering cartridge is disabled orisolated and application or release of operating pressure can take place asrapidly as desired.

1.4.3.4. If additional closing force is required, annulus pressure can be increased 10minutes prior to bleeding off the annulus pressure to close the ball valve. Theadditional pressure will meter into the nitrogen section and increase closingforce. This is helpful if a wireline must be cut, when in a sandy environment, orin any other situation that impedes closing the ball valve.

1.4.3.5. When the first attempt is made to operate the tool, the pressure in the nitrogenchamber will be 400 psi less than the hydrostatic pressure. If the first attempt isnot successful, on subsequent attempts, the pressure in the nitrogen chamberwill be 80 psi greater than hydrostatic pressure (using the acid cartridge) due tothe function of the metering cartridge. It will be necessary compensate for thedifference by increasing the operating pressure at least 500 psi or more to getenough differential to shear the pins and successfully operate the ball valve.Pressure testing the annulus prior to operating the tool will have a similar affectand is not desirable.

1.4.3.6. The maximum recommended differential pressure below the ball valve whenopening is 5,000 psi. Higher differential pressure results in increased operating



pressure with possible component damage and/or failure to open the ball valve.Reducing the differential with applied tubing pressure to less than 5,000 psi willmake it possible to open the ball. LPR™ N ball valves have been opened withdifferentials up to 8,000 psi, but it is not recommended. The Testing ToolsGroup should be consulted, if while opening, a differential greater than 5,000psi is needed.

1.4.3.7. The recommended maximum differential pressure above the ball when openingis 1,000 psi. Higher differential pressure will result in failure to open the ballvalve. The only way to make it possible to operate the ball valve in thesecircumstances is to reduce the differential. The differential pressure limitationfrom above is less than from below because the pressure from above acts acrossthe whole OD area of the seat, forcing it against the ball and producing highlevels of friction.

1.4.3.8. The ball valve can be pressure tested to 15,000 psi from above or below.

1.4.3.9. The metering cartridge compensates for typical downhole temperaturefluctuations so that pressure and volume changes as the nitrogen attempts toexpand and contract do not affect the operation of the tool. As the temperaturerises, excess pressure in the nitrogen section is relieved as oil volume metersout. As the tool cools, additional oil volume meters back into the nitrogensection to maintain pressure. This function is to ensure that the ball remains inthe desired position regardless of temperature changes. If a high volume, highrate injection is planned with resulting downhole temperature changes in excessof 100o F, the Testing Tools Group at the DFW Technology Center should beconsulted. In very severe circumstances, it may be possible that the ability toclose the ball valve immediately after the injection may be impaired.

1.4.3.10. Reducing the charging pressure for the tool does not reduce the operatingpressure because operating pressure is based on an optimum volume. Reducingor increasing that volume results in a higher operating pressure, and potentiallya reduced volume of nitrogen could result in an insufficient volume of oil tosuccessfully operate the tool.

1.4.3.11. The double chamber kit may be used to reduce operating pressure. It is typicallyused in high-pressure wells, however, it can be used simply to reduce operatingpressure. Generally, operating pressure will be reduced by approximately 200psi. The kit increases nitrogen volume.

• 5.03-in. Double Chamber Kit – 615.2273/101203996

• 3.90-in. Double Chamber Kit – 615.2088/101201854

• 3.06-in. Double Chamber Kit – 615.224



1.4.3.12. At higher hydrostatics, the acid and standard cartridges may meter oil so quicklythat it is difficult, if not impossible, to apply annulus pressure quickly enough tocreate the required differential pressure across the operating piston to operatethe ball valve. In such instances, it will be necessary to switch to either a high-pressure cartridge or double chamber kit. At very high hydrostatics, both thehigh-pressure cartridge and the double chamber kit may be required. Bothvolume requirements and the rate that oil meters through the metering cartridgenecessitate changing to these components. See guidelines for changingcomponents in "Metering Cartridge Pressure Range" later in this section.

1.4.3.13. The working pressure ratings for LPR™ Ns are based on differential pressure,not hydrostatic. A tool rated for 15,000 psi working pressure can work at higherhydrostatics as long as the well testing program is designed so that differentialpressure remains within the working pressure rating of the tool. With currenttechnology, as hydrostatics reach the 20,000 psi range, fluid volume available inthe tool, both oil and gas, may be insufficient. This can cause the floatingpistons to bottom out in some circumstances. When hydrostatics exceedworking pressure ratings, the Testing Tools Group in the DFW TechnologyCenter should be contacted.

1.4.3.14. Nitrogen charging pressures should be limited to 10,000 psi or less. Doublechamber kits can be used to reduce the required charging pressure if it is toohigh. If more that 10,000 psi charging pressure is required (even with a doublechamber kit), contact the Testing Tools Group at the DFW Technology Center.


Cased Hole Maintenance Manual Metering Cartridge Pressure Range

1.5 Metering Cartridge Pressure Range

1.5.1 5-in. 15K LPR™ N (PN 615.41950)

*The metering cartridge and N2 chamber configuration can be used in this range, but the operating pressure needs tobe applied in less than 30 seconds.

Metering Cartridge

PN Type

626.41729(obsolete)

Standard

626.41736 Acid

626.41737 High Pressure

Cartridge/ N2 Chamber Normal Pressure Range Extended Range*

Standard/Acid Cartridgewith Single N2 Chamber

0 to 9,000 psi 9,000 to 12,000 psi

Standard/Acid Cartridgewith Double N2 Chamber

3,000 to 13,000 psi 13,000 to 17,000 psi

High-Pressure Cartridgewith Single N2 Chamber

5,000 to 20,000 psi

High-Pressure Cartridgewith Double N2 Chamber

8,000 to 20,000 psi



1.5.2 3 7/8-in. LPR™ N (PN 615.417)


Metering Cartridge

PN Type

615.4178 Standard/Acid


Cartridge/N2 Chamber Normal Pressure Range Extended Range*

Standard Cartridgewith Single N2 Chamber

0 to 5,000 psi 5,000 to 7,000 psi

Standard Cartridgewith Double N2 Chamber

0 to 8,000 psi 8,000 to 11,000 psi


3,000 to 20,000 psi


8,000 to 20,000 psi



1.5.3 3-in. LPR™ N (PN 615.41990)


Metering Cartridge

PN Type

615.4176(obsolete)

Standard


Cartridge/N2 Chamber Normal Pressure Range Extended Range*

Standard Cartridgewith Single N2 Chamber

0 to 2,000 psi 2,000 to 3,000 psi

Standard Cartridgewith Double N2 Chamber

0 to 4,000 psi 4,000 to 5,000 psi


2,000 to 10,000 psi 10,000 to 18,000 psi


5,000 to 16,000 psi 16,000 to 20,000 psi


Cased Hole Maintenance Manual Shear Pin Information

1.6 Shear Pin Information

Tool AssemblyShear Pin Part

NumberNumber of Pins

RequiredShear Pressure

psi/pin

615.41950615.4171

615.41133 4 280

615.417 615.41107 4 310

615.41990615.4175

615.41107 2 470


Cased Hole Maintenance Manual Meter Cartridge Function Test Instructions

1.7 Meter Cartridge Function Test Instructions

1.7.1 Cartridge Metering 1,000-7,000 psi Hydrostatic 7-in.LPR™ N Tester Valve

• PN: 615.43021

• SN: 101002861

• Test Fixture PN: (Not available. Metering cartridge must be tested in the toolassembly.)

Step Instructions Remarks

Test Retest

1. Install cartridge into test fixture.

2. Pressure cartridge on up set end with water to2,000 psi and measure flow for 1 minute. Flowshould be 430-570 mL.

3. Stop pump. Pressure should bleed down to450-200 psi.

4. Pressure cartridge on blank end with water to2,000 psi and measure flow for 1 minute. Flowshould be 430-570 mL.


6. If the pressure bleeds down more than thespecified amount in Steps 3 and 5, installnitrogen and blow cartridge out with 1,500-2,000 psi for 30 seconds. Repeat pressure testper Steps 3 and 5.

7. After testing, place cartridge in a clean plasticbag until ready to use. A copy of this formshould be placed in the data book.

General Remarks:

Date: Tested By:



1.7.2 Cartridge Metering 5 in. OD LPR™ N Tester Valve AllTemp Sour Gas High-Pressure Service

• PN: 626.41737

• SN: 100066886

• Test Fixture PN: 626.41735


Test Retest


2. Pressure cartridge on bottom end with water to 2,000psi and measure flow for 1 minute. Flow should be90-120 mL.


4. Pressure cartridge on top end with water to 2,000 psiand measure flow for 1 minute. Flow should be90-120 mL.

5. Stop pump. Pressure should bleed down to 90-0 psi.

6. If the pressure bleeds down more than the specifiedamount in Steps 3 and 5, install nitrogen and blowcartridge out with 1,500-2,000 psi for 30 seconds.Repeat pressure test per Steps 3 and 5.

7. After testing, place cartridge in a clean plastic baguntil ready to use. A copy of this form should beplaced in the data book.

General Remarks:

Date: Tested By:



1.7.3 Cartridge Metering 5 in. OD LPR™ N Tester Valve AllTemp Sour Gas Acid Service

• PN: 626.41736

• SN: 100066885



Test Retest








General Remarks:

Date: Tested By:



1.7.4 Cartridge Metering 5-in. OD LPR™ N Tester Valve AllTemp Sour Gas

• PN: 626.41729

• SN: __________________



Test Retest


2. Pressure cartridge on bottom end with water to 2,000psi and measure flow for 1 minute. Flow should be200-265 ml.






General Remarks:

Date: Tested By:



1.7.5 Cartridge Metering 3 7/8-in. LPR™ N Tester Valve• PN: 626.4178

• SN: _________________



Test Retest


2. Pressure cartridge on bottom end with water to2,000 psi and measure flow for 1 minute. Flowshould be 200-265 mL.


4. Pressure cartridge on top end with water to2,000 psi and measure flow for 1 minute. Flowshould be 225-300 mL.

5. Stop pump. Pressure should bleed down to 0 psi.



General Remarks:

Date: Tested By:



1.7.6 Cartridge Metering 3 7/8-in. OD LPR™N8,000 to 16,000 psi Acid

• PN: 626.4180

• SN: __________________



Test Retest





5. Stop pump. Pressure should bleed down to 0 psi.



General Remarks:

Date: Tested By:



1.7.7 Cartridge Metering 3-in. LPR™ N Tester Valve• PN: 626.4177

• SN: __________________



Test Retest








General Remarks:

Date: Tested By:


Cased Hole Maintenance Manual Fault Tree Analysis

1.8 Fault Tree Analysis

1.8.1 Surface Function Test

No

1.11. Install pressure lines to upper

and lower annulus ports.2. Apply operating pressure.

1.2Is ballopen?

1.12Wait 10 minutes

Release pressure back to and maintainsimulated hydrostatic

1.13Is ballclosed?

1.15Test complete

No 1.3Has nitrogenpressureincreased?

1.41. Release pressure back to and

maintain simulated hydrostatic.2. Wait 10 minutes.3. Reapply operating pressure.

1.11Check for closedvalve in system.Go to Step 1.1

Go to 1.5

1.14Probable Cause(s):

Did not wait long enough forpressure to meter into the

nitrogen section. Go to Step1.14.1.

Yes

No



1.8.1 Surface Function Test (Continued from 1.14)

No

1.14.1Did not wait long enough forthe operating pressure pressure

to meter into the nitrogensection.

1.14.1.2Is ballclosed?

1.14.1.11. Wait 15 minutes from release of

pressure.2. Apply operating pressure to tool.3. Wait 15 minutes.4. Release pressure back to and

maintain simulated hydrostatic.

1.4.1.3Probable Cause(s):

• Not applying pressure quickly enough. Go toStep 1.8.1.

• Fluid bypassing metering cartridge. Go toStep 1.8.2.

• Mechanical problem in operating operatingarms, ball, etc. Go to Step 1.8.3.

1.14.1.4Continue test. Go

to 1.15.



1.8.1 Surface Function Test (Continued from 1.14.1.4)

No

Yes

Yes

1.61. Release pressure back to

and maintain simulatedhydrostatic.

2. Wait 10 minutes.3. Increase operating

pressure by 200 psi.

1.10Continue test. Go to

Step 1.12.

1.7Is ball open?

1.8Probable Cause(s):

• Not applying pressure quickly enough. Goto Step 1.8.1.

• Fluid bypassing metering cartridge. Go toStep 1.8.2.

• Mechanical problem in operating section,i.e., operating arms, ball, etc. Go to Step1.8.3.

1.9Gauge may be off. Check

calibration and go to Step 1.1.

Continuedfrom 1.4

1.5Is ball open?



1.8.1 Surface Function Test (Continued from 1.8)

1.8.1Not applying pressure quickenough

Pressure should be appliedwithin 60 seconds.

1.8.2Fluid bypassing metering cartridge

1. Apply pressure to lower annulus ports.

2. Monitor nitrogen pressure. If the nitrogenpressure increases at the same or nearlythe same rate as the pump pressure,release pressure and redress the oilsection.

1.8.3Mechanical problem in operating section

• Missing or damaged operating arms –locking dogs.

• Ball installed backwards.



1.8.2 Internal Pressure Test at Surface

No

No

Yes

Yes

2.1Tool leaks with ball in theopen position or with equalpressure above and below a

closed ball.

2.2Are leaks visible?

2.4Blank off pump and

manifold, and pressuresystem up.

2.8Possible leak intonitrogen or oil

chamber.

Go toStep 2.9.

2.3• Disassemble and inspect

O-rings and sealingsurfaces.

• Replace as needed.• Reassemble and retest.

2.5Check for a leak in

manifold andpump.

2.6Does pressure

leak off?

2.7Correct leak in

manifold or pump andcontinue testing.



1.8.2 Internal Pressure Test at Surface (Continued from 2.8)

No

Yes

Yes

2.9Release pressure and remove plugabove the metering cartridge andpressure system up. (Note: In

most 5-in. LPR Ns there is not aplug above the metering cartridge.You can remove the plug justbelow the metering cartridge.)

2.10Does fluidleak out?

2.16Air maybe in ID.

2.13Does nitrogen

pressure increase?

2.17• Release pressure, and

remove as much air aspossible from system.

• Retest.

2.15• Disassemble and inspect o-

ring and sealing surfaces.• Replace as needed.• Reassemble and retest.

2.12• Disassemble and inspect o-

ring and sealing surfaces.• Replace as needed.• Reassemble and retest.

2.11Leak is located inthe oil section.

2.14Leak is located inthe nitrogen or

operating section.



1.8.3 Surface Inspection Prior to Running in the Well

No

No

No

Yes

Yes

Yes

No

3.1Check ball position.

3.3Was tool set upfor the ball in theopen position?

3.2Is ball open?

3.11Is piston visible

in lowerannulus ports?

3.14Remove any plugsin the upper andlower annulus

ports.

3.4Tool was leftin the openposition.

3.51. Remove ball case

and engage lockingdogs. Rotate the ballvalve to the closedposition.

2. Reassemble.

3.9Tool was left with the ball in the

closed position1. Remove ball case, disengage

the locking dogs, rotate the ballto the open position, andreassemble.

2. Go to Step 3.10.

3.8Was tool set upto be in theclosed

position?

3.7Continue

inspection. Go toStep 3.10.

3.10Check oil floatingpiston position.

3.13Check nitrogen pressureand adjust pressure fordownhole conditions.

3.6Continue

inspection. Goto Step 3.10.

3.121. Hook hand pump into fill port

in the metering case.2. Using silicone fluid, pump the

oil piston back until it is visiblein the lower annulus ports.

3. Go to Step 3.13.

Yes



1.8.4 Downhole Tool Does not Operate

No

No

No

No

Yes

Yes

Yes

Yes

4.1Check for mechanical

barriers between pump andannulus. If conditionsallow, open rams and

circulate.

4.2Is rig manifold

closed?

4.5Are bottomholeconditions and

calculations correct?

4.7Excessive

differential acrossball?

4.13Possible pressuretransmissibilityproblems withannular fluid.

Go to Step4.14.

4.10Did tooloperate?

4.3Open.

4.4Operatetool.

4.6If conditions have changedand tool will not operate,contact your supervisor orDallas Engineering for

assistance.

4.8Decrease differential to<2,000 psi from aboveand <5,000 psi from

below.

4.9Operatetool.

4.11Continue

test.

4.12Go to Step

4.14.



1.8.4 Downhole Tool Does Not Operate (Continued from 4.12)

No

Yes

Yes

4.14Increase pump rate to

safe maximum. Increaseoperating pressure by

100-200 psi.

4.15Did tooloperate?

4.17Increase time

interval betweenpressure cycles.

4.18Has maximum

surfacepressure been

applied?

4.191. Open circulating

valve.2. Reverse and pull out

of hole.

4.16Continue test.


lpr-n tester valve funcionamiento 1

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