RH-2 Gas-Lift Valve
Provides enhanced flow performance to maximize the production rate and reduce nonproductive time
- Wells requiring equipment to be wireline retrievable
- Wells that require high injection pressures
- Wells that require high differential submergence pressures up to 6,000 psi (413 bar)
- Wells that require high injection rates to maximize production rates
- High-profile wells with high intervention costs
Features and Benefits
- The complete assembly has been flow-performance tested and provides predictable gas passage for maximum well productivity.
- An inverted bellows is used for high-injection-pressure and high-injection-volume systems, enabling deeper points of injection and higher production rates.
- Positive bellows protection is provided when a mechanical stop prevents bellows over-travel, and a noncompressible silicon fluid provides support for bellows when high differential pressures are applied to the valve. This protection reduces operational failures, nonproductive time (NPT), and operating costs.
- Viscous dampening fluid prevents bellows fatigue and reduces associated well NPT by decreasing stem pounding/chatter.
- Lapped and matched tungsten-carbide seats provide a robust and resilient seal, which reduces chances of seal damage during the unloading phase. A tight seal provides upper unloading valves a positive seal for more efficient well operation.
The Weatherford RH-2 gas-lift valve is specifically designed for deepwater or other high-profile well applications. It is a wireline-retrievable, injection-pressure-operated gas-lift valve with a 1 1/2-in. nominal outside diameter (OD). The high dome-charge capability and the differential-submergence-pressure rating of 6,000 psi (413 bar) make this valve applicable in high-pressure injection systems to achieve deep points of injection and to maximize production. This valve features an inverted-bellows mechanical stop that enhances bellows protection to prevent bellows deformation. Depending on operator preference and specific well conditions, the assembly can be equipped with the Weatherford QS-type reverse-flow check valve, which has a combination modified-PTFE and metal-to-metal seal, or the Q-type reverse-flow check valve, which has a strictly metal-to-metal seal. These check valves were designed by applying computational flow-dynamics analysis and physical testing to maximize gas-passage capability and erosion resistance.
Weatherford RH-2 gas-lift valves can be provided to meet API 19G2 V-1 certification, currently the highest standard in the industry.