Sub-injection and sub-production thick pump
A pump barrel and steam injection technology, which is applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve the problems of mutual interference of oil layers, and achieve the effect of solving interlayer interference
Active Publication Date: 2018-12-14
CHINA PETROLEUM & CHEM CORP +1
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[0015] The embodiment of the present invention's sub-injection, sub-production and pumping thick pump: as figure 1 As shown, because the size of the thickening pump for split injection and pumping is too long, it will be expressed in sections. The split-injection, split-production, and pumping thickening pump includes a pump barrel, and the pump barrel includes an upper pump barrel 2 and a lower pump barrel, and the inner diameter of the upper pump barrel is greater than that of the lower pump barrel. The lower pump barrel includes the first lower pump barrel 14, the second lower pump barrel 16 and the third lower pump barrel 18 for lengthening. The first lower pump barrel 14 is connected with the upper pump barrel 2, and the upper pump barrel 2 is connected with the first lower pump barrel. An eccentric valve body is arranged between the cylinders 14 . The second lower pump barrel 16 is connected to the first lower pump barrel 14 through the first lower pump barrel joint 15,...
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The invention discloses a separated injecting and separated mining thickened oil pump. The separated injecting and separated mining thickened oil pump comprises a pump barrel, wherein the pump barrel comprises an upper pump barrel and a lower pump barrel; the inner diameter of the upper pump barrel is greater than that of the lower pump barrel; an eccentric valve body is arranged between the upper pump barrel and the lower pump barrel; an upper plunger and a lower plunger are arranged in the pump barrel; a fluid storing cavity which communicates with an oil inlet of the eccentric valve body is formed between the upper plunger and the inner wall of the upper pump barrel; an upper travelling valve is arranged on the upper plunger, and comprises an opening and closing valve base and an opening and closing valve core; the opening and closing valve base is movably arranged on the upper plunger in a sleeving manner; and the opening and closing valve core is fixedly arranged on the upper plunger. In an upward stroke, oil fluid of an upper oil layer enters the fluid storing cavity from the eccentric valve body, and along with the upward moving of the opening and closing valve core, the upper travelling valve is closed. In the process that the oil fluid of a lower oil layer is absorbed from the lower part of the lower pump barrel, an oil passing channel between the opening and closing valve base and the upper plunger is blocked, so that the oil fluid absorbed from the lower oil layer cannot communicate with an oil inlet channel of the eccentric valve body, and the problem of interlayer interference between two oil layers in the process of oil pumping is solved.
Description
technical field [0001] The invention relates to the technical field of oil recovery in oil fields, in particular to a thick pump for separate injection and separate production and pumping. Background technique [0002] After the development of heavy oil enters a high-cycle huff and puff, the contradiction between reservoir layers becomes more prominent. The development trend of layered steam injection production of heavy oil is multi-layer injection, optimizing the steam injection volume of each oil layer unit, improving the steam absorption profile of the oil layer, maximizing the degree of crude oil production in the reservoir, and improving oil recovery. The thermal recovery of heavy oil in Henan Oilfield and Shengli Oilfield has the problem of uneven steam absorption in the oil layer. The thermal recovery of heavy oil adopts the method of depressurization. The steam absorption is small, the huff and puff effect is poor, and the oil layer pressure drops slowly, but still...
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IPC IPC(8): E21B43/00
CPCE21B43/00
Inventor 方倩程连文樊琳琳余铁静陈俊国王泊张朋
Owner CHINA PETROLEUM & CHEM CORP