Rotary dynamic sealing device of core lifting mechanism

Abstract

The invention discloses a rotary dynamic sealing device of a core lifting mechanism, which comprises a cabin seat, a first cabin head is arranged at the upper end of the cabin seat, a second cabin head is arranged at the upper end of the first cabin head, and a first through shaft cavity and a second through shaft cavity are formed in the first cabin head and the second cabin head respectively; a pulse dissipation pool is arranged on the cabin seat, the lower end of the first shaft cavity communicates with the pulse dissipation pool, and core lifting shafts are arranged in the first shaft cavity and the second shaft cavity; a first liquid supply port is formed in the pulse dissipation pool, and a second liquid supply port and a third liquid supply port are respectively formed in the middle parts of the first shaft cavity and the second shaft cavity; and the core lifting shaft is connected with the first shaft cavity through a first sealing mechanism, and the core lifting shaft is connected with the second shaft cavity through a second sealing mechanism. The rotary dynamic sealing device is used in the core lifting mechanism with hydraulic reciprocating and low-speed rotary motion dynamic sealing, is particularly suitable for severe working conditions containing granular media such as mud and crude oil, and ensures the sealing performance of the core lifting mechanism.

Description

technical field [0001] The invention relates to the technical field of drilling, in particular to a rotary dynamic sealing device of a core lifting 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. [0003] However, due to the complex occurrence conditions in the deep part and the environment of high temperature and high pressure, in order to obtain the "in-situ core", the driving core lifting mechanism must keep the cabin airtight under high temperature and high pressure during the rotation operation process, and at the same time prevent The internal fluid leaks, but the existing seal...

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

Images