Abstract: A system comprises a cement mixer, a supply tank to supply dry cement to the cement mixer, and a dry cement height sensor to measure the height of the dry cement in the cement supply tank. A valve controls the flow of dry cement to the cement supply tank based on the signals from the dry cement height sensor. Additional apparatus, methods, and systems are disclosed.

Abstract: A system comprises a cement mixer, a supply tank to supply dry cement to the cement mixer, and a dry cement height sensor to measure the height of the dry cement in the cement supply tank. A valve controls the flow of dry cement to the cement supply tank based on the signals from the dry cement height sensor. Additional apparatus, methods, and systems are disclosed.

Abstract: A high pressure fluid pump system of a fluid injection system includes a large volume displacement system, having a large volume pump, and low volume displacement system, having a low volume pump, a programmable logic control (PLC) computer coupled with each displacement system. The large volume displacement system is configured to incrementally or continuously increase a pressure of a fluid in a downhole to a predetermined pressure setting below a maximum pressure setting, and the low volume displacement system is configured to increase the pressure of the fluid from the predetermined pressure setting to a pressure setting above the predetermined pressure setting and at or below the maximum pressure setting. The functioning of the high pressure fluid pump system can be monitored, controlled and tested by the PLC computer. One or more graphical user interfaces can be coupled to the PLC computer for user input.

Abstract: A method of servicing a request during high pressure wellsite pumping operations to manipulate a valve in a manifold system having a plurality of valves includes receiving a plurality of valve configurations that would result in an overpressured manifold system and comparing the request to a proposed valve configuration that would result from a proposed valve manipulation. The method includes determining whether a pump to the manifold system is operating. The method further includes determining whether the proposed valve manipulation inhibits a flow path between the pump and an outlet of the manifold system and would result in an overpressured manifold system. The method also includes in response to a determination that the proposed valve manipulation inhibits the flow path: blocking the proposed valve manipulation and presenting an operator with an override option.

Abstract: A system comprises a cement mixer, a supply tank to supply dry cement to the cement mixer, and a dry cement height sensor to measure the height of the dry cement in the cement supply tank. A valve controls the flow of dry cement to the cement supply tank based on the signals from the dry cement height sensor. Additional apparatus, methods, and systems are disclosed.

Abstract: A high pressure fluid pump system of a fluid injection system includes a large volume displacement system, having a large volume pump, and low volume displacement system, having a low volume pump, a programmable logic control (PLC) computer coupled with each displacement system. The large volume displacement system is configured to incrementally or continuously increase a pressure of a fluid in a downhole to a predetermined pressure setting below a maximum pressure setting, and the low volume displacement system is configured to increase the pressure of the fluid from the predetermined pressure setting to a pressure setting above the predetermined pressure setting and at or below the maximum pressure setting. The functioning of the high pressure fluid pump system can be monitored, controlled and tested by the PLC computer. One or more graphical user interfaces can be coupled to the PLC computer for user input.

Abstract: A method of servicing a request during high pressure wellsite pumping operations to manipulate a valve in a manifold system having a plurality of valves includes receiving a plurality of valve configurations that would result in an overpressured manifold system and comparing the request to a proposed valve configuration that would result from a proposed valve manipulation. The method includes determining whether a pump to the manifold system is operating. The method further includes determining whether the proposed valve manipulation inhibits a flow path between the pump and an outlet of the manifold system and would result in an overpressured manifold system. The method also includes in response to a determination that the proposed valve manipulation inhibits the flow path: blocking the proposed valve manipulation and presenting an operator with an override option.