Abstract: An embodiment of a mixer for mixing a powder with a liquid comprises a mix housing to accommodate a mixture of the powder and the liquid, a liquid delivery housing coupled to the mix housing to provide the liquid thereto, and a powder delivery housing coupled to the mix housing to provide the powder thereto, wherein the mixer is configured to induce a vibration therein for substantially avoid an occluding cake build-up of the mixture thereat.

Abstract: A centrifugal pump for abrasive fluid. The pump may include a bearing housing mounted to a tank containing an abrasive fluid. The bearing housing may house wear-susceptible components in a manner distancing and isolating the components from the fluid. A shaft may be coupled to the bearing housing and disposed through the tank to an impeller for dispensing the abrasive fluid beyond the centrifugal pump. Additionally the impeller itself may be housed within an impeller housing that is mechanically coupled to the bearing housing in order to enhance dimensional stability therebetween. Such a centrifugal pump may be coupled to other pumps such as higher pressure positive displacement pumps. In these circumstances the centrifugal pump may be used to facilitate the mixing of the abrasive fluid and provide a degree of pressurization thereto in advance of the fluid's use at an operation site.

Abstract: A method for continuously batch mixing a homogenized cement slurry is provided that includes providing first and second mix tubs which each perform a process which include: receiving a measured quantity of solid and liquid constituents of a cement mixture; mixing the solid and liquid constituents of the cement mixture into a homogenized cement slurry; and delivering the homogenized cement slurry into a well. In this method, the first and second mix tubs alternate these delivering processes in a synchronized manner such that one of the first and the second mix tubs continually delivering its corresponding homogenized cement slurry to a well pumping system.

Abstract: A system for precisely controlling a discharge rate of a discharged product is provided that includes a feeder bin having an internal chamber; a product disposed in the internal chamber of the feeder bin; and a discharge device that receives a portion of the product and discharges it at a discharge rate from the feeder The system also includes a control system that continually monitors the discharge rate of the discharged product and automatically adjusts the discharge rate based on measurements of the product.