초록 ▼

For use in preparing cement to cement a well, a cement metering system is set forth. The preferred and illustrated embodiment incorporates flow meters measuring water delivered to a cement jet mixer for cement and water into a slurry. A downstream density meter is included. A second water line dilut

For use in preparing cement to cement a well, a cement metering system is set forth. The preferred and illustrated embodiment incorporates flow meters measuring water delivered to a cement jet mixer for cement and water into a slurry. A downstream density meter is included. A second water line dilutes the slurry to adjust the density downwardly to the desired slurry density controlled by the control system. The control system includes a data formatting circuit connected to the various transducers which converts the data so that the density required for the slurry is obtained. As desired, the data can be totalled by integrating over a period of time and shown on the data display. Volume flow rate of the controlled density slurry and bulk volume of dry cement may be determined.

대표청구항 ▼

A method of controlling the finished density as a wet slurry delivered to a well for cementing the well, the method comprising the steps of: (a) mixing a first fixed and insufficient flow of water and dry cement to form wet slurry having a density in excess of the desired density for cementing a wel

A method of controlling the finished density as a wet slurry delivered to a well for cementing the well, the method comprising the steps of: (a) mixing a first fixed and insufficient flow of water and dry cement to form wet slurry having a density in excess of the desired density for cementing a well wherein the wet slurry flows continuously for delivery to the well; (b) adding a variable supplemental flow of water to the wet slurry having the excessive density to reduce the density of the wet slurry; (c) measuring the density of the flowing wet slurry after adding the variable supplemental flow of water; and (d) controlling the variable supplemental flow of water added to the flowing wet slurry having excessive density to obtain a flowing wet slurry having the desired density for cementing a well.