Annular cavity type fluid sonic wave generator
A fluid sound wave and generator technology, applied in vibration generating devices, cleaning tools, wellbore/well components, etc., can solve the problems of one-way force on blocked particles, limited range of unblocking, poor unblocking effect, etc., and achieve attenuation Small, good blocking effect, high power effect
Inactive Publication Date: 2015-03-25
PETROCHINA CO LTD
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Problems solved by technology
[0003] The existing plugging removal devices have multi-stage hydraulic oscillation plugging removal devices and hydraulic jet plugging removal devices, etc., all of which use the generated rotating water jets to scour the formation to remove plugging, but the main disadvantage of jet plugging removal is that it can only be used near the wellbore. Flushing and plugging removal is carried out in a small area, and the plugging removal range is limited. At the same time, due to the unidirectional force of the plugging particles, the plugging removal effect is relatively poor
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[0022] The details of the present invention can be understood more clearly with reference to the accompanying drawings and the description of specific embodiments of the present invention. However, the specific embodiments of the present invention described here are only for the purpose of explaining the present invention, and should not be construed as limiting the present invention in any way. Under the teaching of the present invention, the skilled person can conceive any possible modification based on the present invention, and these should be regarded as belonging to the scope of the present invention.
[0023] Please refer to figure 1 , figure 2 , figure 1 It is a structural schematic diagram of the ring-cavity fluid acoustic wave generator of the present invention; figure 2 It is a schematic diagram of the structure when used in the present invention.
[0024] Such as figure 1 , figure 2 As shown, the ring-cavity fluid acoustic wave generator 10 of the present ...
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Abstract
The invention provides an annular cavity type fluid sonic wave generator. The generator comprises a center tube, wherein a spraying cavity casing is fixed on an outer wall of the center tube in a sleeving manner, a spraying cavity is formed in the spraying cavity casing, a nozzle with a reduced diameter is formed in the lower end of the spraying cavity, and the spraying cavity is communicated with an inner cavity of the center tube through at least one row of guide hole groups which are formed in the tube wall of the center tube; a resonant cavity casing is fixed on the outer wall of the center tube in a sleeving manner and is positioned below the spraying cavity casing at intervals, a resonant cavity is formed in the resonant cavity casing, and a reflecting opening arranged oppositely to the nozzle of the spraying cavity is formed in the upper end of the resonant cavity. The annular cavity type fluid sonic wave generator can be used for generating sonic waves and ultrasonic waves with great power and low frequency, and has the characteristics of great power, long spreading distance and little attenuation. Besides, the plug removal within a certain distance near a well is realized, and the plug removing effect is good.
Description
technical field [0001] The invention relates to the field of formation plugging removal in oil field production, in particular to a ring-cavity fluid acoustic wave generator capable of generating high-power, low-frequency sound waves, which is applied to formation plugging removal within a certain distance near the well in the production process of oil and water wells. Background technique [0002] In the process of oilfield production, particle blockage near the wellbore is one of the technical problems affecting the production of oil wells. In order to maintain the normal production of the oil well, it is necessary to carry out plugging operation for the blockage near the wellbore. At present, the plugging removal methods mainly include physical plugging removal and chemical plugging removal. Chemical plugging removal uses chemical agents to dissolve clogging particles in the near-wellbore area to achieve the purpose of plugging removal. Physical plugging removal methods a...
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Login to View More IPC IPC(8): E21B37/00E21B28/00
CPCE21B37/00E21B28/00
Inventor 刘德铸吴晓明王智博赵吉成李红爽杨昕王颖陈大钊熊梅张林郝玲刘满军
Owner PETROCHINA CO LTD