Downhole pneumatic shock wave generator

Abstract

The invention provides a downhole pneumatic shock wave generator, which at least comprises a generator body, a top shock wave reflector and a bottom shock wave reflector, which are elastic parts, are respectively arranged on the top and bottom of the generator body, and moreover, the top shock wave reflector and the bottom shock wave reflector are arranged on the left side and right side of the generator body, and are used for isolating the generator body from the well wall; the generator body at least comprises a housing, a duct, a nipple, a support and a piston, a movable ring A and a movable ring B are also sleeved on the outer wall of the housing, wherein the movable ring A is located under vent holes, and the movable ring B is located over the vent holes. The structure of the pneumatic shock wave generator is simple, the service life is long, and the defects of the background art are solved. The service life of the pneumatic shock wave generator can be prolonged, and moreover, the generated air shock wave is concentrated.

Description

technical field [0001] The invention relates to an underground pneumatic shock wave generator, which is used for removing silt during the mining of fluid minerals and increasing the output of fluid minerals. Background technique [0002] Fluid resources such as oil and gas are an important part of the national strategic resource reserve, so it is necessary to improve production efficiency in all aspects of exploration, development, and collection. At present, the common production plan for fluid resources such as oil and gas is to construct exploration wells first to determine the distribution and reserves of oil and gas fields. Secondly, in the construction of development wells, directional wells and other technologies are used to allow the wellbore of the entire development well to pass through the oil and gas layer as long as possible. The pressure difference allows the oil and gas resources to flow out from the fractures in the formation and enter the development wellbo...

AI Technical Summary

Problems solved by technology

[0004] The currently known pneumatic shock wave generators have the following problems: 1) After the high-pressure gas pulse is ejected, there is no shield around it, which produces a certain amount of divergence, so that the impact energy of the high-pressure gas cannot fully act on the blockage, resulting in waste of energy and inefficiency

2) The divergent high-pressure gas may push the pneumatic shock wave generator to move, resulting in collision with the screen tube, accelerating the damage of the shock wave generator and reducing its working life

Especially in flammable and explosive formations such as natural gas, the collision between the shock wave generator and the screen may generate sparks and cause major safety accidents such as explosions

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