Mechanical stirring kettle and experimental measurement device for simulating deep-sea oil-gas drilling process

Abstract

The invention discloses a mechanical stirring kettle and an experimental measurement device for simulating a deep-sea oil-gas drilling process. The mechanical stirring kettle comprises a kettle body,an upper end cover is installed on the upper end face of the kettle body, a lower end cover is installed on the lower end face of the kettle body, a mechanical stirrer capable of moving in the axial direction of the kettle body is inserted into the kettle body from the center of the upper end cover, an annular wall surface capable of performing gas leakage is arranged in the kettle body, the annular wall surface is coaxial with the kettle body and divides the space of the kettle body into an inner layer and an outer layer, the inner layer is used for accommodating a drilling fluid and the mechanical stirrer, the outer layer is a gas phase space, the gas phase space is provided with an air inlet hole in a communicating manner, and the inner layer space is provided with a drilling fluid feeding port, a drilling fluid discharging port and an exhaust hole in a communicating mode. According to the mechanical stirring kettle, the environment that high-pressure gas in a leakage stratum continuously leaks into a well in the drilling process of a drill bit can be well restored, and the operation conditions of the drill bit and drilling fluid in the inner layer and the temperature and pressure change conditions can be investigated and recorded.

Description

technical field [0001] The invention relates to the technical field of offshore oil and gas exploration, in particular to a mechanical stirring tank and an experimental measuring device for simulating the deep sea oil and gas drilling process. Background technique [0002] With the increasing demand for energy from global economic development and the deep development of offshore oil and gas exploration and development, oil and gas drilling has developed from shallow ocean water areas to deep water areas. When oil and gas drilling is carried out in deep water areas, the seabed has higher hydrostatic pressure and lower ambient temperature. The possibility of gas hydrate formation has increased, and the research on the prevention and control of hydrates in deepwater oil and gas drilling has also received increasing attention. [0003] Drilling fluid is an important working fluid in drilling engineering, and the performance of drilling fluid and its treatment agent plays a decis...

AI Technical Summary

Problems solved by technology

During the drilling process, free gas and hydrate decomposition gas in the formation invade into the drilling fluid, and hydrates are easily formed in the low-temperature and high-pressure environment on the seabed. The formation of hydrates can block the conduit, upper annulus, blowout preventer and kill pipeline etc., restricting the drill string activities, causing changes in the properties of the drilling fluid, and causing serious harm to oil and gas drilling and production operations

In addition, the dissociation of gas hydrates in hydrate formations due to the disruption of stable conditions may lead to geological disasters

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