Engineering Method Analysis for Gas Compressor Set Relocation Using Multi-Axle Trailer, Jacking-Skidding, and Mobile Crane in Oil and Gas Operation Area

Abstract

Abstract

Gas compressor set relocation in oil and gas operating areas is a high-risk heavy cargo activity involving dismantling, loading, land transportation, cargo securing, unloading, installation, and safety control in an active facility environment. This study presents an engineering analysis of the relocation of two DR1 and DR4 compressor sets from Medco Kaji to Tengah 6 Corridor using multi-axle trailers, lowbed trailers, mobile cranes, and jacking-skidding methods. The research applies a case-study approach based on the method statement, transport plan, tractive effort calculation, lashing calculation, lifting plan, and risk management documentation. The main technical data include a 60-ton compressor, a 6-axle multi-axle trailer weighing approximately 20.70 tons, a planned transport speed of 3 km/h, 30% grade resistance, 3% rolling resistance, and D13 chain lashing. Engineering validation indicates that the moving mass of one compressor and one multi-axle trailer is approximately 80.70 tons. At 33% total resistance, the required pulling force is approximately 261 kN and the required wheel power is approximately 218 kW. Considering 80% drivetrain efficiency and a safety factor of 1.5, the prime mover power requirement is approximately 365 HP; therefore, one 400 HP prime mover can meet the minimum requirement provided that traction, actual grade, and road surface conditions are verified. For cargo securing, the design longitudinal and lateral securing demands are 588.6 kN and 367.9 kN, respectively. Assuming a D13 chain capacity of 5.3 tons or approximately 52 kN per chain at a 12-degree installation angle, the minimum requirement is 12 chains longitudinally and 8 chains laterally; a 16-chain configuration is recommended for improved safety margin. The study concludes that successful compressor relocation depends not only on equipment capacity but also on integrated work methods, calculation validation, risk control, competent personnel, permit to work, and disciplined field execution.

Keywords: heavy cargo; gas compressor; multi-axle trailer; jacking-skidding; tractive effort; lashing; oil and gas HSE