Remote ultra-low-density automatic control system

Abstract

The invention discloses a remote ultra-low-density automatic control system. The system comprises a control unit, a water valve, a flow meter, a cement valve, a slurry mixing tank, a liquid level meter, a circulation pump and a plunger pump; the cement valve, the water valve, the circulation pump and the plunger pump are connected with the slurry mixing tank separately, the flow meter feeds the water supply amount monitored in real time back to the control unit, the liquid level meter is arranged in the slurry mixing tank, the control unit controls the number of revolutions and preset displacement of the plunger pump to achieve automatic displacement as required, the water demand amount and the cement demand amount are calculated by presetting the water-cement ratio and liquid level valuein the control unit, and therefore the opening degrees of the water valve and the cement valve are controlled; the control unit comprises a remote control unit and an equipment end control unit whichare connected with each other. The remote ultra-low-density automatic control system has the advantage of remote cementing equipment monitoring, remote liquid level automatic control, remote automaticwater supply, remote automatic cement supply, remote automatic premixing, remote automatic density control and remote automatic displacement.

Description

technical field [0001] The invention belongs to the field of petroleum equipment, and in particular relates to a remote ultra-low density automatic control system. Background technique [0002] The density of cement slurry with low density cementing density is generally around 1.0g / cc. Generally, for high density cementing, the density of cementing is usually controlled by density meter to control the amount of ash and adjust the density. In low-density cementing operations, because the mud density is close to that of clear water, the density meter cannot detect the amount of ash, so the conventional cementing control algorithm cannot be used in low-density cementing operations. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a remote ultra-low density automatic control system to keep operators away from the noisy and high-pressure working environment. The mud mixing process realizes remo...

AI Technical Summary

Problems solved by technology

In low-density cementing operations, because the mud density is close to that of clear water, the density meter cannot detect the amount of ash, so the conventional cementing control algorithm cannot be used in low-density cementing operations

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