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Zhang Lujun
School of Mechanical and
Automobile Engineering,
Yantai University,
Yantai 264005, China
Gu Xinyi
Drilling Technology Research Institute,
Shengli Petroleum
Administrative Bureau,
Dongying 257000, China
Chen Su
School of Mechanical and
Automobile Engineering,
Yantai University,
Yantai 264005, China
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ENERGY-SAVING TYPE OF
HYDRAULIC WORKOVER RIG
AND SIMULATION FOR LOWERING
PIPESTRING
Abstract:
Research has been done on an energy-saving type of hydraulic workover rig. This rig can recover and reuse the potential energy which is released by the pipestring when lowered, and the equipped power of this rig is only one third of an ordinary rig. The structure and theory of this rig are introduced. The mathematical model of lowering the pipestring is established and a simulation analysis is conducted. Through simulation some conclusions are obtained: The lighter the pipestring is, the less velocity of lowering the pipestring is; The smaller the throttle valve path area is, the less velocity of lowering the pipestring is; Different air vessel volumes have no evident effect on the pipestring lowering velocity. The actual measure results prove that the simulation results are right. Finally, the energy-saving effect of this rig is proved by the field test results.
Key words: Energy-saving Workover rig Energy-recovering Simulation |