An integrated production string for salt prevention and oil recovery for salt-condensed oil wells
A production string and salt prevention technology, which is applied to components of pumping devices for elastic fluids, production fluids, wellbore/well valve devices, etc., can solve problems such as impact, high oil production costs, and application restrictions. To achieve the effects of simplifying the process, reducing the cost of oil recovery against salt, and improving the development efficiency
Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
The traditional salt prevention and plugging removal oil production process is complicated and the oil production cost is high, which seriously affects and restricts the economical and effective development of inter-salt oil wells
[0004] That is, the application of the traditional water-squeezing oil recovery technology is limited when the water-squeezing cycle becomes shorter and shorter
Method used
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[0015] In order to better understand the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0016] Such as Figure 1-3 As shown in the figure, an integrated salt-prevention and oil-production production string for salt-condensed oil wells includes a salt-prevention injection-production pump 1, a constant-pressure one-way water mixing valve 2, a safety joint 3, and an isolation pump connected sequentially from top to bottom. device 4, screen pipe 5 and guide cone 6, the anti-salt injection and production pump includes an outer sleeve 10, a pump barrel and a plunger 11, the outer sleeve and the pump barrel are coaxially arranged, the plunger is arranged in the inner cavity of the pump barrel, and the pump barrel Including the short pump barrel 12 and the long pump barrel 13, the short pump barrel and the long pump barrel are connected by the upper collar 16 of the long pump barrel, the short p...
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The present invention proposes a salt-prevention and oil-production integrated production string for salt-condensed oil wells, including a salt-prevention injection-production pump, a constant pressure one-way water mixing valve, a safety joint, a packer, a screen Pipe and guide cone, the salt-proof injection production pump includes an outer sleeve, a pump barrel and a plunger, the outer sleeve is coaxially arranged with the pump barrel, the plunger is arranged in the inner cavity of the pump barrel, and the pump barrel includes a short pump barrel and a long pump barrel , the short pump barrel and the long pump barrel are connected through the upper coupling of the long pump barrel. The bottom of the long pump barrel is equipped with a pump barrel oil inlet valve, the top of the plunger is opened with an oil outlet hole, and the upper part is equipped with a plunger oil outlet valve. Equipped with a plunger oil inlet valve. The invention has the advantages of simple structure, convenient operation and low oil recovery cost.
Description
technical field [0001] The invention belongs to the technical field of oil production in salt-encrusted oil wells, and in particular relates to an integrated production pipe string for salt-enriched oil production wells. Background technique [0002] Inter-salt strata are both source and reservoir layers, and the oil and gas generated by them are separated by upper and lower salt rocks (closed system) to form inter-salt argillaceous dolomite reservoirs, which contain rich oil and gas resources. In the production process of inter-salt argillaceous dolomite oil wells, with the decrease of temperature and pressure, the solubility of salt decreases, and the salt crystallization blocks the seepage channel, and the effective production time is short. The construction of the anti-salt plugging removal pipe string behind the column, and the pumping pipe string after construction, resulting in high production costs for salt prevention and plugging removal, and the economical and effe...
Claims
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IPC IPC(8): E21B43/00E21B34/06F04B47/00F04B53/16
Inventor 龚兵李长华贺春陈金菊尹翔董晓军
Owner CHINA PETROLEUM & CHEM CORP