The Compression of Fuel Gas for Turbines, Engines, and Boilers in Cogeneration Plants

1995 ◽  
Vol 117 (1) ◽  
pp. 67-73
Author(s):  
I. M. Arbon
Keyword(s):  
High Pressure ◽  
Cost Effective ◽  
Capacity Control ◽  
Gas Wells ◽  
Fuel Gas ◽  
Gas Compression ◽  
Landfill Sites ◽  
Synthetic Lubricants ◽  
Alternative Sources ◽  
Gas Supply

The proliferation of gas-fired cogeneration plants in recent years had led to many installations being located on sites remote from high-pressure gas pipelines. Since it is often impractical or not cost effective to provide a dedicated high-pressure gas supply, such installations are often based close to alternative sources of fuel, such as small natural gas wells, landfill sites, or sewage digester plants. This paper will look at typical gas sources and composition, requirements of the fired equipment, the types of fuel gas compressors normally used, methods of compressor capacity control, and the development of synthetic and semi-synthetic lubricants for fuel gas compression duty.

Utilizing Novel Expandable Steel Packers to Overcome Multi-Stage Fracturing Completion Deployment Challenges in Horizontal Gas Wells

2021 ◽  
Author(s):  
Ebikebena M. Ombe ◽  
Ernesto G. Gomez ◽  
Aldia Syamsudhuha ◽  
Abdullah M. AlKwiter
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Cost Effective ◽  
Outer Diameter ◽  
Gas Wells ◽  
Multi Stage ◽  
High Pressure High Temperature ◽  
Zonal Isolation ◽  
Gas Bearing ◽  
Productive Time

Abstract This paper discusses the successful deployment of Multi-stage Fracturing (MSF) completions, composed of novel expandable steel packers, in high pressure, high temperature (HP/HT) horizontal gas wells. The 5-7/8" horizontal sections of these wells were drilled in high pressure, high temperature gas bearing formations. There were also washed-outs & high "dog-legs" along their wellbores, due to constant geo-steering required to keep the laterals within the hydrocarbon bearing zones. These factors introduced challenges to deploying the conventional MSF completion in these laterals. Due to the delicate nature of their packer elastomers and their susceptibility to degradation at high temperature, these conventional MSF completions could not be run in such hostile down-hole conditions without the risk of damage or getting stuck off-bottom. This paper describes the deployment of a novel expandable steel packer MSF completion in these tough down-hole conditions. These expandable steel packers could overcome the challenges mentioned above due to the following unique features: High temperature durability. Enhanced ruggedness which gave them the ability to be rotated & reciprocated during without risk of damage. Reduced packer outer diameter (OD) of 5.500" as compared to the 5.625" OD of conventional elastomer MSF packers. Enhanced flexibility which enabled them to be deployed in wellbores with high dog-leg severity (DLS). With the ability to rotate & reciprocate them while running-in-hole (RIH), coupled with their higher annular clearance & tolerance of high temperature, the expandable steel packers were key to overcoming the risk of damaging or getting stuck with the MSF completion while RIH. Also, due to the higher setting pressure of the expandable steel packers when compared to conventional elastomer packers, there was a reduced risk of prematurely setting the packers if high circulating pressure were encountered during deployment. Another notable advantage of these expandable packers is that they provided an optimization opportunity to reduce the number of packers required in the MSF completion. In a conventional MSF completion, two elastomer packers are usually required to ensure optimum zonal isolation between each MSF stage. However, due to their superior sealing capability, only one expandable steel packer is required to ensure good inter-stage isolation. This greatly reduces the number of packers required in the MSF completion, thereby reducing its stiffness & ultimately reducing the probability of getting stuck while RIH. The results of using these expandable steel packers is the successful deployment of the MSF completions in these harsh down-hole conditions, elimination of non-productive time associated with stuck or damaged MSF completion as well as the safe & cost-effective completion in these critical horizontal gas wells.

Compressor Station Fuel Gas Superheating Using Lube Oil Waste Heat

2004 ◽  
Author(s):  
Katie T. Sell ◽  
Paul R. Langston ◽  
Rene´ H. Mitchell
Keyword(s):  
High Pressure ◽  
Heat Exchanger ◽  
Gas Turbine ◽  
Heat Exchangers ◽  
Waste Heat ◽  
Drop Out ◽  
Compressor Station ◽  
Fuel Gas ◽  
The North ◽  
Gas Compression

Compressor station gas turbine engines require protection from fuel gas liquid drop-out caused by the Joule-Thomson effect when natural gas is let down from transportation line pressure to the burner supply pressure. Indeed, gas turbine manufacturers specify a minimum gas superheat, which requires fuel gas heating at pipeline temperatures experienced in Northern Europe. Conventionally, fuel gas superheating is achieved through the use of either electric or gas fired water bath heaters, which require maintenance, and an external heat source. Meanwhile, waste heat from the turbo-compressor lube oil system is released to atmosphere, typically by air-cooled heat exchangers. Hence, there is an obvious opportunity to protect the gas turbine engine, whilst reducing the amount of heat rejected to the environment. Mechanical integrity is a key operational requirement when combining fuel gas superheating with lube oil cooling in a single heat exchanger. Fuel gas at high pressure must not enter the low pressure lube oil system. High integrity Printed Circuit Heat Exchangers (PCHEs) are ideally suited to this application, as they are diffusion bonded and fully welded heat exchangers. Used extensively in offshore high pressure gas compression trains in the North Sea, PCHEs have demonstrated that they are low maintenance items that are ideal for use in remote unmanned applications, such as those required by gas compression stations. PCHEs are highly compact, reducing space and structural requirements. This allows the exchanger to be installed underneath the compressor, minimizing the visual impact of the heat exchanger. In addition, safety and pressure relief requirements are significantly reduced, a PCHEs do not have a failure mode analogous to tube rupture in shell and tube heat exchangers. National Grid Transco have realized the opportunities of PCHEs and operated them successfully over many years in many of their compression stations throughout the United Kingdom.

Gas Compression in Combined Cycles With Gasification

1978 ◽  
Author(s):  
R. W. Foster-Pegg
Keyword(s):  
High Pressure ◽  
Power Plants ◽  
Low Pressure ◽  
Combined Cycle ◽  
Relative Performance ◽  
Residual Oil ◽  
Fuel Gas ◽  
Oxygen Plant ◽  
Gas Compression ◽  
Combined Cycles

This paper is an investigation of the relative performance of combined-cycle power plants incorporating fuel gasification with different methods of gas pressurization to establish an order of merit of the compression systems. The type of raw fuel is not identified. The findings could apply to any likely feedstock for gasification, such as coal, residual oil, pitch, or maybe refuse. Compression systems for air-blown and oxygen-blown gasifiers are examined. In the cases of oxygen-blown gasification, the energy required by the oxygen plant is included in the evaluation. The fuel gas may be manufactured at low pressure and the gas compressed or the gas may be manufactured at high pressure, requiring that the oxidant used in the gasification be compressed into the gasifier. Both the above systems and combinations of the two wherein both oxidant and fuel gas are partially compressed will be considered. The study evaluates the various compression systems on a simplified basis to identify gross differences between systems. It is not the intention of the study to establish the relative merits of systems which are closely related in performance.

scholarly journals High Pressure Fuel Gas Supply System for ME-GI

2016 ◽  
Vol 51 (1) ◽  
pp. 23-28
Author(s):  
Kouichi Namba ◽  
Yutaro Wada ◽  
Yasuyuki Tsuji
Keyword(s):  
High Pressure ◽  
Supply System ◽  
Fuel Gas ◽  
Gas Supply

Real-time Downhole Monitoring and Logging Reduced Mud Loss Drastically for High-Pressure Gas Wells in Tarim Basin, China

2008 ◽  
Author(s):  
ShunChang Wang ◽  
Xinquan Zheng ◽  
Chun Jiang Zheng ◽  
Bailin Wu ◽  
YiMing Jiang ◽  
...  
Keyword(s):  
High Pressure ◽  
Real Time ◽  
Tarim Basin ◽  
Gas Wells ◽  
Mud Loss ◽  
Downhole Monitoring
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