N Series Valves
Parveen N Series Valves utilizes a nitrogen-charged dome and bellows configuration designed for either continuos or intermittent flow applications. They are especially suitable for use as unloading and operating valves in areas where high gas lift pressures are available. Since the charge pressure above the bellows is affected by temperature, it is important that the operating temperatures at the valve be known. These valves are available in both wireline-retrievable and conventional installations.
Benefits of Design Principle
- Vibration protected, 3-ply Monel bellows are designed to withstand hydrostatic pressures upto 5000 psi.
- Nitrogen dome charge, acting on the O.D. of the bellows, permits bellows to expand uniformly without stacking, thus prolonging bellows life.
- The multiple port sizes available make this valve series appropriate for a wide range of operating conditions.
- Reversible seat available in several different materials.
L Series Valves
Parveen L Series Valves are temperature independent, wireline retrievable, spring-loaded throttling type valves designed for continuos flow gas lift applications. These valves are designed to help adjust the required gas injection rate in response to changes in the tubing pressure at the valve, injecting more gas for a heavy gradient fluid than for a light gradient fluid. This proportional response allows the injection of the optimum volume of gas to maintain the desired fluid lifting capabilities of the installation.
Standard Series Models
LM-16R: 1 inch diameter wireline retrievable valve for installation in a TM Mandrel with BK-2 or M Latch.
L-12R: 1.5 inch diameter wireline retrievable valve for installation in a TG or T Mandrel with a TG, RK, RM or T2 Latch.
LN Series Valves
Parveen LN Series Valves are wireline retrievable throttling type valves designed for high gas volume and high pressure continuos flow installations. A specialized bellows design allows for very high valve set pressures and improved throttling characterstics. The proportional response capabilities, determined by dynamic flow tests of these valves, enable design engineers to calculate accurately the gas injection volumes to be achieved throughout the anticipated range of operating conditions of the well.
Standard Series Models
LN-21R: 1.5 inch wireline retrievable, proportional response valve for a TG or T Mandrel with a TG, RK, RM or T2 latch.
LNM-31R: 1-inch wireline retrievable, proportional response valve for a TM Mandrel with a BK-2 or M Latch.
WF Series Valves
Parveen WF Series Valves are pilot operated, large ported valves designed specifically for intermittent lift applications. This design provides a large port for maximum lift efficiency with controlled spread for minimum gas consumption and maximum surface gas control flexibility. They can be tailored to utilize any type or combination of surface gas control: choke, time-cycle controller, and pressure regulator. This design flexibility permits their use in both high and low productivity wells or for chamber lift applications.
Benefits of Design Principle
- Large port area allows maximum gas passage to provide high slug lifting capacity for maximum production.
- Preset spring tension is designed to provide accurate and predictable set pressures which are independent of downhole temperatures and provide full utilisation of operating pressure to bottom valve.
- Resilient seal back check valve is designed to provide protection from intrusion of production fluids into annulus.
O Series Valves
Parveen O Series Valves are designed for circulating operations and provide a means of communication between the tubing and the tubing/casing annulus.
Benefits of Design Principle
- Cv valves for each orifice size determined with ISA procedures to provide accurate sizing for proper injection rates.
- Effeciency of back check valve provides large flow capacities. Positive sealing feature of back check valve provides protection from intrusion of production fluids into casing annulus.
- Various orifice materials (SS, monel, inconel, tungsten carbide) available to meet application requirements.
D and ED Valves
Parveen D Series Valves are installed in side pocket mandrels by wireline to block the mandrel's injection gas ports. Dummies can be run prior to or after completion for testing tubing, packers and other equipment. In new installations, dummies can be retained in the mandrels until gas lift valves are required to maintain production. Then, dummies are pulled and gas lift valves installed by wireline. Also during the life of the well, gas lift valves installed above the fluid level can be replaced with dummies to block off injection gas. They are available in 1 and 1.5 inch sizes.
Parveen ED Series Equalizing Valves with integral latches are designed to equalize tubing and casing and/or circulate prior to pulling the valve. They are also available in both 1 and 1.5 inch sizes.
Standard Series Models
D-14R: 1.5 inch wireline retrievable dummy valve for TG or T Mandrels with TG, RK, RM and T2 Latches.
DM-14R: 1 inch wireline retrievable dummy valve for TM Mandrels with BK-2 and M Latches.
DT-14R: 1.5 inch wireline retrievable, high-temperature dummy valve for TG or T Mandrels with TG, RK, RM and T2 Latches.
DTM-14R: 1 inch wireline retrievable, high-temperature dummy valve for TM Mandrels with BK-2 and M Latches.
* ED-30R: 1.5 inch wireline retrievable equalizing dummy valve for TG or T Mandrels with an integral Latch.
* EDM-30R: 1 inch wireline retrievable equalizing dummy valve for TM Mandrels with an integral BK-2 Latch.
* Both of these valves may be equalized and pulled with one wireline run.
Latches are available in a wide range of designs for use with retrievable gas lift and circulation valves to be installed in side pocket mandrels. These latches are designed to be installed with a minimum of force, a feature very important in deviated wells where forceful downward jarring may be difficult. Side pocket mandrels feature two types of pocket latch profiles: the G-type which has a 180-degree ecentric latch ring profile with the no-go surface located near the lower end of the latch; and the A-type which has 360 degree latch profile with the no-go surface above the locking mechanism. Latches used in each of these profiles are not interchangeable; however valves and other flow control devices can be adapted from one profile to the other by selecting the correct latch.
1 1/2-inch TG and 1-inch M Latches are designed for installation in G-type pocket mandrels. A set of collet type locking dogs are free to move up and into a recess in the locking mandrel as the latch engages the pocket profile. When an upward pull is exerted on the latch, the full diameter of the locking mandrel moves behind the dogs which locks them in the set position. To retrieve the valve and latch, an upward force is applied, which shears a pin. This action moves the locking the mandrel up, which frees the dogs to retract as the valve and latch are pulled.
1 1/2-inch RK and 1-inch BK-2 Latches are designed for installation in G-type pocket profile side pocket mandrels. They utilize a locking ring which is held in position by spring force. As the latch enters the side pocket profile, the locking ring moves up and into the recessed area of the latch. When the latch seats, the ring is positioned in the locking recess of the pocket. To retrieve the latch, a pin is sheared by upward force allowing the locking ring mandrel to move up and out of the way. The ring is then freed to disengage from the locking recess as the valve and latch are retrieved.
1 1/2-inch T2 Latches are designed for installation in A-type pocket mandrels. They utilize a set of collet type locking dogs configured inside a slotted sleeve. As the latch enters the pocket, the dogs move up and into a recess into the locking mandrel. After reaching the no-go position, an upward pull causes the dogs to move over the locking mandrel and lock into the pocket recess. To release the locking dogs, an upward force is applied which shears a pin, moving the locking mandrel up. The latch and valve are then free to be retrieved.
1 1/2-inch RM Latches are designed for installation in A-type pocket profile mandrel. They have a set of spring-loaded locking dogs designed to move up into a recessed area on the latch core when run into the latch profile of the mandrel. The valve is lowered into the pocket until the no-go shoulder is reached. The spring force moves the locking plug ring downward, forcing the dogs to move over and onto the large O.D. of the inner mandrel, thus locking the valve in place. To release the latch, a pin is sheared by upward force which allows the inner mandrel to move up and out of the way. The locking dogs are then free to return to the recess area as the latch and valve are retrieved.
Parveen exclusively manufactures Subsurface Valves in India.
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