A high temperature and high pressure rotary dynamic sealing mechanism

Abstract

The invention discloses a high-temperature and high-pressure rotary dynamic sealing mechanism, which comprises a cabin seat, a cabin head is arranged on the upper end of the cabin seat, a penetrating shaft cavity is arranged on the cabin seat, and a pulse dissipating pool is arranged on the cabin seat; There is a lifting mandrel, and the lifting mandrel extends into the pulse dissipation pool; the first liquid supply port is opened on the pulse dissipation pool, and the second liquid supply port is opened in the middle of the shaft cavity, and the upper end of the lifting mandrel passes through the gap between the spacer and the shaft cavity. The inner wall is connected, and the lower end of the spacer is placed on a pillow block in the shaft cavity; a first sealing ring and an isolation ring are arranged between the spacer and the shaft cavity, and the gap between the isolation ring and the first sealing ring is filled with mud medium Sealing part; the upper end of the spacer is encapsulated by the hatch cover, which is arranged on the cover seat at the upper end of the hatch head, and the hatch cover is sleeved on the lifting mandrel. This scheme is used in the rotary motion sealing core lifting mechanism of high temperature and high pressure containers or structures with shafts, especially suitable for mud, crude oil and other harsh working conditions containing granular media, to ensure the sealing of the core lifting mechanism.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a high-temperature and high-pressure rotary dynamic sealing mechanism. Background technique [0002] The in-situ rock mechanical behavior of different depths of rock formations is the leading science and important theoretical basis for deep drilling, deep resource development and utilization, and earth application science. The core and key is how to obtain "in-situ cores" under deep environmental conditions. ", and real-time loading test and analysis were carried out under the in-situ fidelity state. The physical, mechanical, chemical and biological characteristics of deep rocks are closely related to their in-situ environmental conditions. However, when the existing coring equipment drills deep cores, it will lead to the destruction of the core stress state or stress release, and the strong mechanical disturbance will destroy the core. The authenticity of core stress informati...

AI Technical Summary

Problems solved by technology

[0005] 1) The problem of effective contact between the high-speed rotating shaft and the seal;

[0006] 2) The safety and reliability of single-stage rotary dynamic seal

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