초록 ▼

An automatic mixture control apparatus includes a micro-computer-based data acquisition and control device which responds in real time to flowmeter and densimeter signals to control water inlet and bulk cement valves so that a cement slurry is produced at the desired rate and density. The data acqui

An automatic mixture control apparatus includes a micro-computer-based data acquisition and control device which responds in real time to flowmeter and densimeter signals to control water inlet and bulk cement valves so that a cement slurry is produced at the desired rate and density. The data acquisition and control device is programmed to provide means for computing desired positions for the valves and for computing corrections for the positions. A related automatic mixture control method is also disclosed.

대표청구항 ▼

A method of automatically producing a cement slurry having a desired density and mixing rate, comprising the steps of: (a) entering into a computer data including a desired slurry density, a desired mixing rate, a desired water requirement and a desired yield; (b) operating a water inlet valve with

A method of automatically producing a cement slurry having a desired density and mixing rate, comprising the steps of: (a) entering into a computer data including a desired slurry density, a desired mixing rate, a desired water requirement and a desired yield; (b) operating a water inlet valve with the computer so that a quantity of water is flowed into a slurry producing circuit; (c) operating a cement inlet valve with the computer so that a quantity of dry cement is added into the slurry producing circuit and the quantity of water to produce a slurry having the desired slurry density; (d) circulating the slurry through the slurry producing circuit; and (e) concurrently operating the water inlet valve and the cement inlet valve with the computer in response to the entered desired slurry density, desired mixing rate, desired water requirement and desired yield to add more water and cement into the slurry producing circuit, thereby producing more slurry, while maintaining the desired slurry density and mixing rate.