Compressor selection is a decision with a long life. A reciprocating machine handles high pressure ratio and variable molecular weight well but requires more maintenance, imposes pulsation on the piping and has limited capacity per unit. A centrifugal machine handles large volumes efficiently and runs longer between overhauls but is sensitive to molecular weight change and requires anti-surge protection. Choosing the wrong type for a duty that will change over field life produces a machine that is either persistently unreliable or persistently operating at poor efficiency.

Surge is the defining hazard for centrifugal machines. When flow falls below the minimum for the head being developed, flow reverses through the machine in a rapid cycle that damages bearings, seals and internals. Anti-surge control exists to prevent this by recycling gas, and its design involves the surge line, the control line margin, the response speed of the recycle valve and the volume of the recycle loop. Anti-surge systems that are set too conservatively waste power continuously; systems that are set too close to the surge line fail during fast transients. Reciprocating machines fail differently. Valve failure is the dominant cause of capacity loss and is often invisible from the control room until performance has degraded substantially. Rod load limits, cylinder cooling, packing condition and pulsation-induced piping vibration all require monitoring, and the piping around a reciprocating machine is a fatigue environment that has produced numerous loss of containment incidents.

Auxiliary systems deserve particular attention because they cause more trips than the compressor itself. Lube oil temperature and pressure, seal gas supply pressure and cleanliness, cooling water or air cooler performance, suction scrubber level control and instrument reliability collectively account for a large share of compressor unavailability. A facility that improves auxiliary system reliability usually recovers more production than one that overhauls the machine.

By the end of this training, participants will be able to:

• Calculate compression work, power requirement, discharge temperature and stage pressure ratio for a defined duty
• Select between reciprocating, centrifugal and screw compressors against duty, gas properties and operating profile
• Determine staging arrangements, interstage cooling and scrubbing requirements
• Interpret centrifugal compressor performance maps and identify surge, stonewall and operating margin
• Design and assess anti-surge control including surge line, control margin, valve sizing and recycle loop volume
• Explain reciprocating compressor capacity control methods and their effect on rod loading and efficiency
• Specify compressor auxiliary systems including lubrication, sealing, cooling and scrubbing
• Apply condition monitoring techniques including vibration analysis and performance trending
• Diagnose capacity loss, high discharge temperature, surge, seal failure, valve failure and vibration problems systematically

The training establishes compression thermodynamics and performance calculation first, then applies them to each machine type so that selection and operating behaviour follow from the underlying physics. Performance maps, cylinder sizing calculations, power and discharge temperature calculations and anti-surge margin assessments are worked through numerically for representative gas compositions. Machine construction is presented through sectional drawings and component photographs, and auxiliary systems through schematic arrangements from installed units. The troubleshooting content is developed from documented compressor failures, including surge damage, valve failure, seal failure and pulsation-induced piping fatigue, with participants working through the diagnostic evidence in each case.

Organisations sending participants to this training will:

• Increase compressor availability and reduce the production deferment associated with compression downtime
• Reduce compression power consumption through better control margin setting and operating point management
• Reduce machine damage from surge, liquid carryover and lubrication or seal system failure
• Improve the technical quality of compressor selection, specification and vendor evaluation
• Strengthen condition monitoring programmes by focusing on the parameters that predict actual failure modes
• Reduce loss of containment risk from pulsation and vibration induced piping failures

Participants will:

• Calculate compressor performance and verify whether a machine is delivering what it should
• Read and apply performance maps and cylinder performance data confidently
• Understand anti-surge control design and judge whether a system is correctly configured
• Diagnose compressor problems from process and vibration data rather than by component replacement
• Specify and review compressor packages and auxiliary systems against duty requirements
• Build specialist capability in the equipment most often responsible for gas facility downtime

• Rotating equipment, mechanical and reliability engineers
• Facilities, process and production engineers responsible for compression systems
• Operations engineers, supervisors and panel operators running compressors
• Maintenance engineers and technicians supporting compression equipment
• Control and instrumentation engineers working on anti-surge and machine protection systems
• Project and commissioning engineers specifying or accepting compressor packages
• Technical staff evaluating compressor vendor proposals and repair options

Upon successful completion of this training course, delegates will be awarded an official Certificate of Completion issued by the Petroleum Engineers Association (PEA), an ISO 9001:2015 certified training organization. The certificate carries 10 Credits and formally records the total learning hours completed.

Each certificate is signed by the Course Facilitator and the CEO of the Petroleum Engineers Association, and serves as verifiable proof of professional training that delegates can present to employers and professional bodies worldwide.