Self-adaptive flow regulating and water controlling device for oil-gas well

Abstract

The invention discloses a self-adaptive flow regulating and water controlling device for an oil-gas well. The self-adaptive flow regulating and water controlling device comprises an outer sleeve, anda base pipe arranged in the outer sleeve in a sleeved mode; the outer wall of the base pipe is provided with a flow adjusting and water controlling controller located in the outer sleeve, and the flowadjusting and water controlling controller comprises a long inlet flow channel, a short inlet flow channel, a fluid flow dividing channel and a rotational flow disc cavity; the long inlet flow channel and the short inlet flow channel extend along a straight line, the flow channel areas are constant, the length of the long inlet flow channel is greater than that of the short inlet flow channel, and the long inlet flow channel and the short inlet flow channel communicate with an inlet of the fluid flow dividing channel; and an outlet of the fluid flow dividing channel communicates with the rotational flow disc cavity and is arranged to output fluid to the rotational flow disc cavity in a rotational flow mode, the channel area of the fluid flow dividing channel is gradually reduced from theinlet to the outlet, the fluid flow dividing channel surrounds the outer side of the rotational flow disc cavity, and a throttling channel is arranged between the fluid flow dividing channel and the rotational flow disc cavity.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field well completion, relates to oil and gas well flow control and water completion technology, in particular to an oil and gas well self-adaptive flow control system with the function of automatic adjustment of oil, gas and water to prevent water, stabilize oil and gas production. water fixtures. Background technique [0002] In homogeneous reservoirs, oil and gas wells are affected by the flow pressure drop during production, and the production and flow rates at different locations are quite different; The production burst effect is particularly obvious, and the resulting uneven profile is prone to coning once it encounters water or gas, resulting in the obstruction of fluid outflow in some liquid-producing sections, and the production of oil and gas wells will be greatly reduced. [0003] In the 1990s, flow regulation and water control technology was introduced into oil and gas field well...

AI Technical Summary

Problems solved by technology

But in reality, the flow at the same position in the formation will also change during the entire oil and gas production process, and the required resistance will also change accordingly, and the pre-designed inflow controller may lose its effect

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