Gas Lift

Lea, James F.; Nickens, Henry V.; Wells, Michael

doi:10.1016/b978-075067724-0/50011-9

Cited by 4 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lea [67] et al proposed that the minimum pressure point on the tubing dynamic curve can be used as the identification method for gas well fluid accumulation. However, this method is not applicable to tight gas reservoirs, and gas wells can still produce steadily even if both intersections of the inflow and outflow curves intersect to the right of the minimum pressure point, mainly because of the sluggish formation pressure response in tight gas reservoirs.…”

Section: Other Gas Well Accumulation Criteriamentioning

confidence: 99%

Advances in Gas Well Fluid Accumulation Modeling

Liu¹

2023

AJST

View full text Add to dashboard Cite

Liquid accumulation at the bottom of a well is an important cause of production reduction or even shutdown of natural gas wells, and it is inevitable that water-bearing formations generate liquid accumulation when producing natural gas. Therefore, it is important to study gas well liquid accumulation models and identify liquid accumulation at the bottom of a well in order to take timely and reasonable process measures to deal with liquid accumulation at the well. Based on this, this paper analyzes the current status of domestic and international research on gas well critical fluid-carrying droplet models and critical fluid-carrying film models through literature research, analyzes the problems and development trends of research on gas well fluid accumulation prediction, and provides a comprehensive and systematic summary of the progress of gas well fluid accumulation model research.

show abstract

Section: Other Gas Well Accumulation Criteriamentioning

confidence: 99%

Advances in Gas Well Fluid Accumulation Modeling

Liu¹

2023

AJST

View full text Add to dashboard Cite

show abstract

“…Gas lift is a simple and flexible artificial lift method in which external gas is injected continuously or intermittently from the casing-tubing annulus into the tubing string through specially designed valves (GLV) (Winkler and Blann, 2007). The entire objective is to reduce the flowing bottomhole pressure, thereby increasing the inflow of produced fluids (Lea et al, 2008). Although sophisticated gas lift technologies such as smart GLV (Xu et al, 2013) and advanced Gas-Lift Insert System (GLIS) (Aliyeva and Novruzaliyev, 2015) have been developed, all GLVs are still being manufactured based on King's design (King, 1940).…”

Section: Introductionmentioning

confidence: 99%

Investigating effects of ball size on the performance of gas lift valve for both modified and optimized seats

Kabir

Emadi

Elldakli

et al. 2018

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

View full text Add to dashboard Cite

The seat and the ball are the only two components of a Gas Lift Valve (GLV) that can be switched out to meet changing gas throughput requirements. For this reason, individual pairings of balls and seats must be designed to meet the particular requirements of specific situations. While conventional GLV seats have sharp edges, a modified seat design with partially beveled edges has been shown to improve gas throughput. This design was then tested using benchmark valve and was optimized by beveling the entire port of the seat. These experiments were conducted using a ball diameter that was 0.0016 m larger than the diameter of the port top, although the effects of even larger ball sizes have also been studied using benchmark valves with conventional seats. Researchers have yet to explore the effects of ball diameters smaller than the Port Top Diameter (PTD) and larger than the Port Bottom Diameter (PBD) for modified and optimized seat designs. In this paper, the effects of smaller ball size on the GLV gas throughput have been analyzed using both modified and optimized seat designs and actual GLV. The ball was 0.0016 m smaller than the PTD of the seats. Geometric models have been deduced to calculate the generated upstream area (frustum area) open to flow. This frustum area is a function of stem travel, and the dimensions of the seat and ball. Theoretical calculations have been compared with results obtained through robust experimental methods. The entire experimental program was divided into four individual experiments. The static testing was used to fix the dome pressure and the opening pressure. The hysteresis effect associated with the bellows assembly was minimized using the aging procedure. Probe tester was used to measure the stem travel. Finally, the gas throughput of the GLV was measured using dynamic testing. The smaller ball sizes were found to significantly improve the gas throughput of actual GLV. This improvement was as high as 179% for large PBD seats. However, the frustum area practically decreased for these cases. This result suggests that the flow coefficient has more effect on GLV gas throughput compared to frustum area.

show abstract

“…4 As natural gas is produced from depletion-drive reservoirs, the energy available to remove the produced-accumulated liquids, condensates and formation water to the surface ____________________ This thesis follows the style of SPE Journal.…”

Section: Liquid Loadingmentioning

confidence: 99%

“…For the compressor and water pump option, both equipment (1, 2) are delivering, separately or commingled (3,4,5,6), the required flow rates and pressures at the injection manifold. This option may demand a larger compressor and pump, since the multiphase pump will no longer provide the boosting pressure as depicted in the first option.…”

Section: Compressor and Water Pumpmentioning

confidence: 99%

“…The system is then pressurized (by means of a water pump) until reaching the required operating value. Both phases leave the vessel at the same pressure and they can be either mixed (3,4) or distributed separately (5, 6) prior to entering the tubing (7). From an economic standpoint, the tank option is the least expensive since a water pump downstream from the process will not be necessary as the pressure of the liquid will be provided by the air phase at the tank.…”

Section: Compressor -Water Pump -Tankmentioning

confidence: 99%

See 1 more Smart Citation

Design of a High-Pressure Research Flow Loop for the Experimental Investigation of Liquid Loading in Gas Wells

Fernández

Falcone

Teodoriu

2010

SPE Projects, Facilities &Amp; Construction

View full text Add to dashboard Cite

Liquid loading in producing gas wells is the inability of the produced gas to remove produced liquids from the wellbore. A review of existing flow loops worldwide revealed that specialized areas of research such as liquid loading in gas wells are still lacking dedicated test facilities. This project presents the design of a new dedicated facility to be located at the TowerLab at the Richardson building with adequate operating conditions to reproduce the flow regimes encountered prior to and after the onset of liquid loading in gas wells. The facility consists of a compressed air system, pipelines for air and water, a pressure vessel containing glass beads, an injection manifold, and flow control and monitoring devices.Our results show that three compressors working in parallel is the most technical and economic configuration for the TowerLab based on the overall costs provided by the supplier, the footprint but most importantly the flexibility. The design of the pressure vessel required a cylindrical body with top and bottom welded-flat head covers with multiple openings to minimize its weight. The pipelines connecting major equipment and injection manifold located at the pressure vessel were selected based on the superficial velocities for air and water. These values also showed the need for independent injection using two manifolds instead of commingling flow through a tee joint. The use of digital pressure gauges with an accuracy of 0.05 to 25% and coriolis or vortex meters to measure air flowrate is also suggested.

show abstract

Gas Lift

Cited by 4 publications

References 0 publications

Advances in Gas Well Fluid Accumulation Modeling

Advances in Gas Well Fluid Accumulation Modeling

Investigating effects of ball size on the performance of gas lift valve for both modified and optimized seats

Design of a High-Pressure Research Flow Loop for the Experimental Investigation of Liquid Loading in Gas Wells

Contact Info

Product

Resources

About