The Experts below are selected from a list of 60 Experts worldwide ranked by ideXlab platform
Yang Xiaofang - One of the best experts on this subject based on the ideXlab platform.
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Research and application of flexible pluger & retrievable Standing Valve pumps
Oil Drilling & Production Technology, 2020Co-Authors: Yang XiaofangAbstract:Now during the the process of pump detection, the entire pump needs to pulled out and replaced by a new one. So theworkover cost may increase. To solve the problem, the flexible plunger retrievable Standing Valve pump is developed. The plungeris mainly made from fluoroplastic materials plus auxiliary materials, so ti has strong abrasion resistence. When the exterior surface isabraded, the plunger can compensate itself through expansion, and the fit clearance between it and the pump barrel will not be increased.It is easy to workover. And it is not necessary to pull out the tubing from holes. The only work is to pull out the rod, replace plunger cupand traveling Valve. Field application shows that workover time and cost are saved. This kind of pump has a good future in the oilfield.
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research and application of flexible pluger retrievable Standing Valve pumps
Oil Drilling & Production Technology, 2010Co-Authors: Yang XiaofangAbstract:Now during the the process of pump detection, the entire pump needs to pulled out and replaced by a new one. So theworkover cost may increase. To solve the problem, the flexible plunger retrievable Standing Valve pump is developed. The plungeris mainly made from fluoroplastic materials plus auxiliary materials, so ti has strong abrasion resistence. When the exterior surface isabraded, the plunger can compensate itself through expansion, and the fit clearance between it and the pump barrel will not be increased.It is easy to workover. And it is not necessary to pull out the tubing from holes. The only work is to pull out the rod, replace plunger cupand traveling Valve. Field application shows that workover time and cost are saved. This kind of pump has a good future in the oilfield.
Gong Xianfeng - One of the best experts on this subject based on the ideXlab platform.
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development and application of the Standing Valve cover
Oil Field Equipment, 2004Co-Authors: Gong XianfengAbstract:This paper presents the analysis on the reasons of the lower pump efficiency in the higher gas-oil ratio well, aiming at the shortcoming of common Standing Valve cover and the conventional structure improved. The improvement makes the Valve ball close time shortened and leakage reduced. The course of fluid reaching the pump tube through Standing Valve cover is comparatively gentle, thus reducing gas escape and improving pump efficiency.
Zhu Ze - One of the best experts on this subject based on the ideXlab platform.
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Research and application of Standing Valve assembly on tube pumps for blockage for prevention
Oil Field Equipment, 2020Co-Authors: Zhu ZeAbstract:To solve the limitation existing in the tube pump that it can't prevent obstacle from falling into oil wells, We designed two type of Standing Valve assembly basing on a large number of study and experiment, and they can effectively solve tube pump blockage caused by sand and mud grain etc. By ground experiment and use in twentyeight well, it's conclude that the two type of modified Standing Valve assembly are highly efficient and the rate of success is 100%.
Peng Yong - One of the best experts on this subject based on the ideXlab platform.
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Automatic measurement technology of the single-well oil-gas yield based on the pump dynamometer card of a suck-rod pumping well
Journal of Xi'an Shiyou University, 2020Co-Authors: Peng YongAbstract:On the basis of the dynamometer card of the pump in suck-rod pumping system and the auto-diagnosis technology of oil well's working conditions,the opening points and the closing points of the traveling Valve and the Standing Valve of the pump are determined by the curvature of the closed curve of the dynamometer card.Based on these,and the theoretical method of the automatic measurement technology and its mathematical model are put forward.The mean error between the oil-gas yields calculated by the mathematical model and the practically measuring yields is 8.93%,the maximum error is 20.26%,the minimum error is 0.07%,and the wells whose relative error is less than 15% account for 85.71%.This shows that the automatic measurement technology is reliable,and therefore it has good application prospects.The technology has been applied to the automatically monitoring system of beam-pumping wells.
Shengshan Chen - One of the best experts on this subject based on the ideXlab platform.
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A novel method of output metering with dynamometer card for SRPS under fault conditions
Journal of Petroleum Science and Engineering, 2020Co-Authors: Lv Xiaoxiao, Hanxiang Wang, Shengshan ChenAbstract:Abstract Remote monitoring of sucker rod pumping system (SRPS) based on polished rod dynamometer cards (DC) is an effective means to reduce the operating costs and realize the real-time control. Nevertheless, how to obtain the working process and the production rate of SRPS from polished rod DC is always a puzzle because of complex down-hole motions. The typical solution for this problem is deriving the pump DC via the wave equation to achieve the effective stroke of plunger. But some key parameters involved in this approach such as Valve leakage and the fill factor are difficult to determine accurately, especially under fault conditions, which may influence the accuracy of output metering. In order to address this tough issue, in this paper, a novel method of output metering with DC is proposed based on quantitative analysis of fault. The method consists of two parts, the first part is an approach to simulate the working process of SRPS under fault conditions, specifically it's an improved simulation model characterized by a set of fault parameters, which is presented through analyzing the mechanisms of sucker rod pumps at normal and several faulty scenarios. And the second part is a method implemented by genetic optimization algorithm to determine the fault parameters set of the actual SRPS. Using parameters of typical well, the analysis of effects of faults on SRPS is carried out. The simulation results show that Valves leakage reduces the flow rate of liquid significantly in the period of effective stroke, which leads to the distortion of output metering results of effective stroke method. Compared with single faults, coupling faults aggravate the production reduction of SRPS. Furthermore, when the well fluid contains gas, the impact of traveling Valve leakage on the reduction of production is greater than that of Standing Valve leakage, but the consequence is opposite when formation energy is insufficient. Besides, the carbon fiber rod and fiberglass rod SRPS are more sensitive to Valve leakage, while the steel rod and wire rope SRPS are more sensitive to the condition of insufficient liquid supply. Eventually, the proposed method is verified experimentally through the productive parameters and measured DC of actual wells collected from an oilfield. The obtained results demonstrate the effectiveness of the proposed method for output metering and fault diagnosis as well.