A high temperature and ultra high pressure rotary linear reciprocating dynamic seal test device

Abstract

The invention discloses a high-temperature, ultra-high-pressure rotary linear reciprocating dynamic sealing test device, which includes a rotary linear motion shaft, which is connected with a hydraulic motor through a gear box to realize the rotary motion of the shaft; the upper end of the rotary linear motion shaft passes through the The gear box is connected with the linear reciprocating motion driving mechanism, and the linear reciprocating motion driving mechanism is connected with the control system to realize the linear reciprocating motion of the shaft; the liquid outlet of the hydraulic motor is connected with the oil cooling system; Both the pressure port and the second decompression port are connected to the cooling pool through the overflow valve, the cooling pool is connected to the temperature rise pressure supply system, and the temperature rise pressure supply system is respectively connected to the first liquid supply port and the second liquid supply port. This solution provides a two-stage decompression dynamic seal (rotary + reciprocating linear) device, which can realize a dynamic seal with a pressure of 140MPa and a temperature of 150°C; at the same time, the device can be used to develop high-temperature and ultra-high-pressure rotary seals with different structures , and verify its sealing ability.

Description

technical field [0001] The invention relates to the field of drilling technology, in particular to a high-temperature, ultra-high-pressure rotary linear reciprocating dynamic sealing test device. Background technique [0002] Requiring energy resources from the deep is the most urgent practical problem in our country at present, it is also a major strategic scientific and technological issue in our country, and it is also a major energy security issue in our country. 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...

AI Technical Summary

Problems solved by technology

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. Authenticity of core stress information and pore pressure information

At the same time, the existing coring equipment cannot maintain pressure and heat preservation, which distorts the gas-liquid phase information and microbial information contained in the in-situ core, and cannot completely scientifically obtain the composition information and occurrence state information of the in-situ core, which greatly increases Uncertainties in Deep Earth Science Research

[0003] During the "in-situ core" rotary drilling and the lifting of fidelity coring equipment after coring, due to the insufficient dynamic sealing performance between the deep in-situ thermal insulation and high-pressure environment simulation cabin and the end structure of the fidelity coring tool, the simulation There is a risk of overflow of high-temperature and high-pressure fluid in the experimental cabin, which will cause fluctuations in environmental parameters such as pressure and temperature in the core storage cabin, making the core unable to maintain its state in the deep in-situ environment

Images