초록 ▼

A general purpose control system for use in the oilfield pressure pumping service industry. The system is comprised of a dedicated control computer mounted on the apparatus to be controlled and one or more remote operator units. The dedicated control computer interfaces with all the sensors and cont

A general purpose control system for use in the oilfield pressure pumping service industry. The system is comprised of a dedicated control computer mounted on the apparatus to be controlled and one or more remote operator units. The dedicated control computer interfaces with all the sensors and control elements of the apparatus. The control computer performs all the calculations necessary to control the apparatus. The dedicated control computer communicates with other computerized equipment on the apparatus such as engines, pressure sensors, speed sensors and flowmeters to extract data and perform control functions. The dedicated control computer has no operator controls. The dedicated control computer communicates via a single electrical cable to the operator control pendants. The control pendant is a small portable unit that provides the complete operator interface. The control pendant is comprised of graphic/alpha-numeric liquid crystal display and light emitting diode displays which provide the operating status of the system. The control pendant also includes key switches which are used for controlling the apparatus.

대표청구항 ▼

[ What is claimed is:] [1.] A blender system for preparing a fluid mixture for fracturing and propping an oil bearing geological formation, comprising:(a) a blender apparatus adapted to prepare said fluid mixture, said blender apparatus including control devices adapted to receive control signals an

[ What is claimed is:] [1.] A blender system for preparing a fluid mixture for fracturing and propping an oil bearing geological formation, comprising:(a) a blender apparatus adapted to prepare said fluid mixture, said blender apparatus including control devices adapted to receive control signals and sensing devices adapted to transmit sensor signals;(b) a programmable system controller operably coupled to said blender apparatus adapted to calculate and transmit said control signals to said control devices and receive said sensor signals from said sensing devices, the system controller including a memory storing blending process programs; and(c) a least one programmable control pendant operably coupled to said programmable system controller to provide an operator interface thereto, each control pendant adapted to receive input commands from an operator and display status conditions of said control devices and said sensing devices to said operator, each programmable control pendant being contained in a housing having a face plate situated on a surface of the housing, the face plate containing a plurality of displays, a plurality of key pad sets, each key pad set comprising at least one key.