Longitudinal absorber for reducing perforation instantaneous shock vibration force

A technology of instantaneous impact and vibration force, which is applied in the direction of mining fluid, wellbore/well components, earthwork drilling and production, etc. It can solve the problems of the decline of the sliding sealing performance of the inner and outer shaft sleeves, the possibility of accidental detonation, and the false detonation of the detonation device when the pressure is increased. problem, to achieve the effect of changing the environment of liquid compression and vibration reduction, solving the fragile dynamic seal, and improving safety and reliability
CN103174402AInactive Publication Date: 2013-06-26CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEM CORP
Publication Date
2013-06-26
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a longitudinal absorber for reducing perforation instantaneous shock vibration force. The longitudinal absorber comprises a pressure guide tube, an inner sleeve sleeved outside the pressure guide tube and an outer sleeve sleeved outside the inner sleeve; two ends of the pressure guide tube are respectively connected with an upper connector and a lower connector, a connection position between the pressure guide tube and the upper connector is fixed through threads, an internal cavity of the pressure guide tube is always communicated with that of the upper connector, and the pressure guide tube penetrates through an internal cavity of the lower connector to be communicated with the outside; a spring is further sleeved outside the inner sleeve, the spring and the outer sleeve are arranged in parallel, and an outer casing is sleeved outside the spring; and sealing pieces are arranged at the connecting position of the upper connector and the pressure guide tube and at the connecting position of the upper connector and the inner sleeve, and the sealing pieces are further arranged at the connecting position of the inner sleeve and the outer sleeve and at the connecting position of the lower connector and the pressure guide tube. The longitudinal absorber effectively solves the problem that a motive seal of a conventional perforation absorber is easy to damage, weakens the perforation instantaneous shock vibration force, changes the liquid compression vibration attenuation environment, improves safe reliability and is simple and reasonable in structural design and strong in operability.
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Description

technical field

[0001] The invention relates to perforation damping technology for oil and gas wells, in particular to a longitudinal shock absorber for reducing the instantaneous impact vibration force of perforation. Background technique

[0002] At present, there are mainly two methods of vibration reduction for oil and gas well perforation, hydraulic and mechanical, which are mainly used for the protection of testing tools in the joint construction of perforation testing. With the further development of perforation technology, especially the perforation laboratory of Shengli Oilfield found that there is a close relationship between the pressure change at the moment of perforation and the perforation effect. Here comes the challenge. First of all, the sliding sealing performance of the inner and outer shaft sleeves of the current shock absorber is reduced; secondly, the internal compression structure makes the detonator withstand instantaneous pressure, which is prone to...

Claims

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