Axial flow mud pulse slow release device

Abstract

The invention discloses an axial flow type mud pulse slow release machine. The axial flow type mud pulse slow release machine comprises a cavity filled with inert gas; the cavity includes a cover and a rubber inner cylinder; two ends of the rubber inner cylinder are respectively connected with a first outlet pipe and a second outlet pipe; and the inner diameters of the first outlet pipe and the second outlet pipe are the same, and are smaller than the inner diameter of the rubber inner cylinder. The axial flow type mud pulse slow release machine reduces pressure fluctuation and flow pulsation in an absorption pipeline through the large-diameter cavity and the inert gas filled between the rubber inner cylinder and an outer cylinder. In addition, an adjustable mechanism is designed by using a mud inlet pipe with a rectangular thread, an added pre-pressure spring and self elasticity of the rubber inner cylinder; and an adjustable rotating drum out of an end cover rotates to stretch the rubber inner cylinder to change the rigidity of the rubber cylinder to adapt to mud currents with different parameters so as to achieve an effect of reducing the mud pulse to the maximum extent. Finally, the mud pulse slow release machine adopts a split design; and although the part number is relatively increased, the part manufacturing difficulty is reduced.

Description

technical field [0001] The invention relates to a shock-absorbing device, in particular to an axial-flow mud pulse slow release device. Background technique [0002] In the prior art, due to the structural characteristics of the drilling mud pump itself, as well as its special working environment and transmission medium, the problem of pressure fluctuation caused by flow pulsation has always been a key problem to be solved by the mud pump. Especially for plunger pumps, flow pulsation is one of the key indicators to measure pump performance, and reducing flow pulsation during the distribution process of hydraulic plunger pumps is of great significance to reducing pressure shock and noise. [0003] In deep well drilling, the vertical pressure of the drill string is as high as 20MPa-52Mpa, and the mud pump is suddenly out of control and overloaded, and the inlet and outlet of the mud pump will inevitably cause high fluctuating pressure. In the field, due to consideration of th...

AI Technical Summary

Problems solved by technology

However, for the mud circulation system, due to its special working environment and transmission medium, it is difficult to apply the pulse damper used in the hydraulic system to the mud circulation system. Even if it is used, the slow-release effect is not ideal

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