Multifunctional drill bit rock breaking experiment device and method capable of testing triaxial strength parameter of rock

Abstract

The invention discloses a multifunctional drill bit rock breaking experiment device capable of testing the triaxial strength parameter of rock. The device comprises a main body device, a pressure head structure, a confining pressure system, an acoustic emission system, a temperature control system and a pore material injection system. The device has the benefits as follows: the real temperature, crustal stress and pore pressure of a stratum can be simulated in a closed environment, a triaxial mechanical test and a drill bit rock breaking test can be completed simultaneously, a stress-strain curve of a rock sample, dynamic vibration of a drill bit and a drill column, bit pressure and influences of footage on the rock sample can be determined, an experiment basis is provided for research of mechanical properties of complex oil and gas reservoirs and drill bit rock breakage under multiple conditions, a rock breaking experiment can be conducted while conventional mechanical properties of the rock are tested, two experiments can be completed once after the designed temperature and pressure conditions are met, the total time consumption is reduced, and the utilization rate of underground rock cores can be effectively increased.

Description

technical field [0001] The invention relates to the field of petroleum and natural gas engineering, in particular to a multifunctional drill bit rock-breaking experimental device and method capable of testing rock triaxial strength parameters. Background technique [0002] After more than half a century of exploration and development in my country, the level of exploration and development of shallow conventional oil and gas resources has become higher and higher. In order to alleviate the pressure on domestic oil and gas supply and demand, the country has listed deep oil and gas resources together with marine and deep water oil and gas resources and unconventional oil and gas resources. Three areas of oil and gas strategic development. [0003] Deep oil and gas resources generally occur in deep formations above 6,000 meters. The rocks are dense, the three-dimensional stress is high, the pore pressure is high, and the temperature is high. These are the key problems restricting...

AI Technical Summary

Problems solved by technology

However, other gas hydrate-related experimental devices cannot meet the needs of rock-breaking experiments.

Therefore, conventional rock-breaking devices cannot be used to study rock-breaking problems related to natural gas hydrate exploitation.

[0006] On the other hand, the current rock-breaking experimental device can only accomplish the purpose of breaking rocks, and cannot measure the mechanical properties of rocks while breaking rocks.

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