A mechanical stirring tank and an experimental measurement device for simulating deep sea oil and gas drilling process

Abstract

The invention discloses a mechanically stirred tank and an experimental measuring device for simulating the deep-sea oil and gas drilling process. The mechanically stirred tank includes a tank body. A mechanical stirrer that can move along the axial direction of the kettle body is inserted into the center of the kettle body; an annular wall surface capable of gas leakage is provided inside the kettle body, and the annular wall surface is coaxial with the kettle body and the kettle body The space is divided into inner and outer layers, the inner layer is used to accommodate the drilling fluid and the mechanical agitator, and the outer layer is the gas phase space; the gas phase space is connected with air inlet holes; the inner layer space is connected with the drilling fluid feed Mouth, drilling fluid outlet, exhaust hole. This mechanical stirring tank can better restore the environment where the high-pressure gas in the permeable formation continues to leak into the well during the drilling process of the drill bit, and can inspect and record the operating conditions, temperature and pressure of the drill bit and drilling fluid in the inner layer Changes.

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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