RH-1 Gas-Lift Valve
Provides enhanced flow performance to maximize the production rate and reduce nonproductive time
- Wells that require wireline-retrievable equipment
- Wells with high injection pressures that require gas-lift valves to have dome charge of up to 2,500 psi (172 bar) and 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
- Empirical test data can be used to predict gas-passage characteristics, which supports gas-lift design accuracy and maximum well productivity.
- Positive bellows protection–which reduces operational failures, nonproductive time (NPT), and operating costs–is activated by two means: when a mechanical stop prevents bellows overtravel, and when a noncompressible silicon fluid supports the bellows as high differential-submergence pressures are applied to the valve.
- A viscous dampening fluid prevents bellows fatigue by decreasing stem pounding and chatter.
- Lapped and matched tungsten-carbide seats provide a robust and resilient seal, which reduces chances of damaging the seal during the unloading phase and increases efficiency in well operations.
- High-volume integral reverse-flow check valves, which have been tested to API 19G2 V-1 standards, provide a barrier for tubing-to-casing communication for well containment.
- An aerodynamic check valve enables maximum gas passage and erosion resistance, which increases the overall production rate.
- The check valve includes a combination modified-PTFE and metal-to-metal seal to maintain sealing integrity in low- and high-pressure situations.
- Optimized stem travel and tightly controlled manufacturing tolerances maximize gas passage and provide a longer bellows life cycle, which significantly reduces failures and nonproductive time.
- Manufacturing specifications include differential-submergence-pressure testing and a specific bellows type.
- When specified, packing seals can meet API 19G2 requirements, which creates a proper seal that isolates tubing and casing and prevents well-containment issues.
- The valve is compatible with gas-lift mandrels from all manufacturers that meet API 19G1 standards, which provides operational flexibility.
- The valve can be manufactured from a wide range of materials and can be customized for use in corrossive well conditions.
- The larger dome reduces the load rate and improves flow characteristics to support optimal production.
The Weatherford RH-1 gas-lift valve is a premium 1-in. nominal outside diameter (OD), wireline-retrievable, injection-pressure-operated (IPO) gas-lift valve specifically designed for deepwater or other high-profile well applications. The high dome-charge capacity of 2,500 psi (172 bar) and differential-submergence-pressure rating of 6,000 psi (413 bar) enable the valve to perform in high-pressure injection systems and achieve deeper points of injection.
The valve features a bellows protection system that prevents bellows deformation when exposed to high differential pressures. The check-valve is equipped with a combination modified-polytetrafluoroethylene (PTFE) and metal-to-metal seal, which has been designed by applying computation of flow-dynamics analysis and physical testing to maximize gas-passage capability and erosion resistance.
RH-1 gas-lift valves can meet American Petroleum Institute (API) 19G2 V-1 certification, which is the highest industry standard.