Study of a new hydraulic pumping unit based on the offshore platform

Abstract

This article introduces a new technology about a rod pumping in the offshore platform according to the demand of offshore heavy oil thermal recovery and the production of stripper well, analyzes the research status of hydraulic pumping unit at home and abroad, and designs a new kind of miniature hydraulic pumping unit with long‐stroke, low pumping speed and compact structure to resolve the problem of space limitation. The article also describes the whole structure and the working principle of this pumping unit, determines the choice of stroke and rate of the pumping unit, and establishes mathematical models based on the polished rod loads. A new composite hydraulic cylinder with a special structure was designed by combining the hydraulic cylinder with the energy accumulator. This composite hydraulic cylinder is applied on land, and the model prototype runs smoothly, which indicates that the whole structure design of the pumping unit is reasonable and the control strategy is correct.

Scaling, Complexity, and Design Aspects in Computational Fluid Dynamics

“…As illustrated in Figure 1, a typical sucker rod pump system includes a moving contact area between the traveling unit (plunger) and a fixed tube (barrel). Further more, a traveling ball valve is attached with the end of the plunger and a standing ball valve is installed with the tube near the oil and gas reservoir where the oil and gas are pushed through the fissure formation [17,18] by the so-called formation pressure. To facilitate the reciprocal motions of sucker rod pump systems, a clearance between 3 to 8 mills (one thousandth of an inch) is often reserved to avoid the direct contact (abrasion) between the plunger and the tube [19,20] and to facilitate the transport of sands and particles in oil and gas mixtures [21,22].…”

Safety evaluation of LD27-2 WHPB platform based on rod pumping

“…However, the low temperature resistance and structural factors of the submersible electric pump unit restrict either the selection of heavy oil thermal recovery method or the selection of the implantation temperature. To overcome this shortage, the small hydraulic pumping units for offshore platforms have been designed and successfully applied to the wellhead and downhole equipment, and the further technical difficulties have also been solved (Yu et al 2016). A new rod pumping recovery technology named "steam stimulation along with conventional sucker rod pumping" for offshore heavy oil recovery has gradually formed, thereby gaining high-efficient recovery onshore (Yu et al 2016;Chang et al 2017).…”

Bayesian network approach to fault diagnosis of a hydroelectric generation system

“…4 In Brazil, 375 small hydropower plants with the total capacity of 4799 MW are currently running, and another 1701 MW installed capacity will be constructed in the next 10 years. Obviously, the economic benefit and carbon dioxide mitigation of such hydroelectric generating systems are well known to the general public, [6][7][8][9][10][11] but the stability and safety impacts of themselves still require enough attentions. Obviously, the economic benefit and carbon dioxide mitigation of such hydroelectric generating systems are well known to the general public, [6][7][8][9][10][11] but the stability and safety impacts of themselves still require enough attentions.…”

“…5 Hydroelectric generation systems are under construction all over the world to ensure the enforcement of stricter energy and environmental policy. Obviously, the economic benefit and carbon dioxide mitigation of such hydroelectric generating systems are well known to the general public, [6][7][8][9][10][11] but the stability and safety impacts of themselves still require enough attentions.…”