Continuous medium- and noncontinuous medium-based impact-reducing separator for pyrotechnic separation

Abstract

The invention belongs to the field of oil production equipment for oil fields, and particularly relates to a side-mounted sucker rod centralizer. A side face of a centralizer body is provided with a skewed groove and two axial straight grooves, wherein a fixing device which can fix the centralizer body on a sucker rod is mounted in the centralizer body, the fixing device structurally comprises a sliding sleeve, a wave spring washer and a taper sleeve which are arranged from the top down, the side faces of the three are all provided with axially through notches, a section, which corresponds tothe fixing device, of the inner side of the centralizer body is provided with a bar-shaped projection, and the notches of the side faces of the sliding sleeve and the wave spring washer are just filled up with the bar-shaped projection. The conventional nylon centralizer is improved, so that a series of problems, such as 'the probability of sucker rod separation is increased due to the increased number of joint connections', 'the conventional nylon centralizer can be easily worn and broken', 'the conventional nylon centralizer can easily slide on the sucker rod' and 'the conventional nylon centralizer cannot be arranged at any position of the sucker rod accordi The invention discloses a continuous medium- and noncontinuous medium-based Impact-reducing separator for pyrotechnic separation.After gunpowder explodes, a high-energy stress wave is transferred from a solid continuous medium into a multi-path noncontinuous medium of a particle system to destroy the arrangement state of the particle system and form the reconstruction of a contact force of the particle system, so that kinetic energy produced by impact is converted into elastic energy and heat energy of the particle system,blocking the rapid transfer of the high-energy stress wave in the continuous medium. By creating a continuous-noncontinuous medium contact model, establishing a bond effect-based peridynamic method taking long-range force characteristic and 'boundary effect' into consideration and applying the model to analyze the impact reduction effect of the pyrotechnic separator, the impact-reducing separatorcan achieve an obvious impact reduction effect on the basis of less added mass, thus ensuring that the design requirement can be met by pyrotechnic separation structure connection rigidity and fundamental frequency.ng to the requirement of actual operation', are solved.

Description

technical field [0001] The present invention primarily proposes the principle of energy dissipation of stress waves in a particle system, and based on this principle is used in the technical field of pyrotechnic separation and buffering, and specifically relates to a shock reducing device for pyrotechnic separation. Background technique [0002] The dynamic mechanical behavior of granular materials under the action of explosion and impact load has always been one of the hot topics in the academic circle. The interaction between the granular system and the container wall is an important part that affects the particle behavior, but there are few studies at present. Point contact or micro-surface contact occurs between the container walls, and the particle system is a geometrically highly nonlinear body. Between the container wall and the particle system, when the impact propagates from the continuous medium to the discontinuous medium, the change of the vibration surface of the...

AI Technical Summary

Problems solved by technology

However, due to the limited internal space and the limited impact reduction ability of the separated structure, this method is difficult to reduce the large-scale shock response; in addition, in engineering practice, adding cushions and buffer holes at the connection interface of the separated structure, or The method of adding buffer blocks in the configuration to attenuate the impact load, but this technology will often greatly reduce the connection stiffness of the pyrotechnic separation structure and the overall stability of the system, and increase the difficulty of assembly

That is to say, only by extending the shock transmission path or adding buffer holes, etc., cannot significantly reduce the large-scale shock response

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