Heavy oil steam jet lift tool and steam gas lift system
A steam and tool technology, applied in the direction of production fluid, drill pipe, casing, etc., can solve the problems of amplifying the production pressure difference of the oil layer, and achieve the effect of reducing heat loss, improving production and lifting efficiency
Active Publication Date: 2021-06-25
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0006] Aiming at some or all of the above-mentioned technical problems existing in the prior art, the present invention proposes a heavy oil steam jet lifting tool, which can overcome the adverse effects on the oil layer caused by the back pressure formed by the pressure generated by the gas injection , to further enlarge the production pressure difference of oil layers, and improve the production and lifting efficiency of gas lift wells without increasing investment
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[0031] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, and are not exhaustive of all the embodiments. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.
[0032] The inventor noticed in the process of invention that the existing oil recovery method using gas lift has problems such as gas injection back pressure and heavy oil being greatly affected by ambient temperature. For deep wells with low pressure, the lifting efficiency is low and the cost of gas injection is low. High; for high-production wells with high pressure and productivity, the production pressure difference cannot be further amplified, which seri...
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The invention proposes a heavy oil steam jet lifting tool and a steam gas lift system. The tool includes: an upper joint; a working cylinder, the upper end of which is connected to the upper joint, and a nozzle, a negative pressure chamber and a mixing and diffusion cavity are arranged inside the tool chamber, a well fluid inlet, a produced fluid inlet communicated with the negative pressure chamber, and a produced fluid spout communicated with the mixing and diffusion chamber; There is a liquid production channel and a produced liquid outlet; a baffle, which is connected in the working cylinder and located below the diffuser tube, separates the well liquid inlet and the produced liquid spout; a lower joint, which connects the the lower end of the mandrel. The tool can overcome the adverse effect on the oil layer caused by the back pressure formed by the pressure generated by the gas injection, further amplify the production pressure difference of the oil layer, and improve the production and lifting efficiency of the gas lift well without increasing the input.
Description
technical field [0001] The invention relates to the technical field of oil production tools, in particular to a heavy oil steam jet lift tool used for heavy oil thermal recovery wells and a steam gas lift system including the tool. Background technique [0002] Compared with other mechanical recovery methods, gas lift production has many advantages, such as strong adaptability, that is, it can be applied to deep wells, shallow wells, high oil-gas ratio wells, high sand content wells, deviated wells, and horizontal wells. It is easy to manage and relatively low in cost. inferior. However, one disadvantage of the gas lift oil recovery process is that heavy oil cannot be lifted, because the pressure of the fluid in the well decreases gradually during the upward movement of the well during lifting, so that the process of expansion and refrigeration occurs, and the temperature will gradually decrease, while the thick oil The viscosity of oil changes sharply with the change of te...
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IPC IPC(8): E21B43/00E21B43/24E21B33/12E21B17/00
CPCE21B17/00E21B33/12E21B43/122E21B43/24
Inventor 付道明伊伟锴刘欢乐姚志良吴俊霞侯倩毛军
Owner CHINA PETROLEUM & CHEM CORP