Well fracturing systems with electrical motors and methods of use

A system for stimulating oil or gas production from a wellbore, comprising:

• a hydraulic fracturing pump unit having
• a hydraulic fracturing pump driven by an electrical fracturing motor;
• a variable frequency drive (VFD) controlling the electrical fracturing motor;
• a fracturing pump blower unit driven by an electrical blower motor;
• and
• a fracturing pump lubrication unit comprising a lubrication pump driven by an electrical lubrication motor, and
• a cooling fan driven by an electrical cooling motor;
• an electrically powered hydraulic blender unit configured to provide treatment fluid to the hydraulic fracturing pump unit for delivery to the wellbore, the blender unit comprising at least one electrical blending motor;
• and
• a system control unit comprising
• (i) a hydraulic fracturing pump unit controller configured to control the hydraulic fracturing pump unit;
• and
• (ii) a hydraulic blender unit controller configured to control the hydraulic blender unit.

A system control unit for use with a system for stimulating oil or gas production from a wellbore, the system control unit comprising:

• (a) a hydraulic fracturing pump unit controller configured to control a hydraulic fracturing pump unit having one or more hydraulic fracturing electrical motors, the hydraulic fracturing pump unit controller comprising
• (i) a hydraulic fracturing pump controller configured to control a hydraulic fracturing pump;
• and
• (ii) a hydraulic fracturing blower unit controller configured to control a hydraulic fracturing pump blower unit;
• and
• (iii) a hydraulic fracturing lubrication unit controller configured to control a hydraulic fracturing pump lubrication unit;
• and
• (b) a hydraulic blender unit controller configured to control a hydraulic blender pump unit having one or more hydraulic blender electrical motors, the hydraulic blender pump unit controller comprising
• (i) a blender control unit for controlling the operation of one or more blender units,
• (ii) a blender slurry power unit (SPU) pump control unit for controlling the operation of one or more blender SPU units,
• (iii) a blender SPU blower control unit for controlling the operation of one or more blender SPU blower units, and
• (iv) a blender blower control unit for controlling the operation of one or more blender blower units.

A method for stimulating oil or gas production from a wellbore using an electrically powered fracturing system, the method comprising:

• (a) establishing a data channel connecting at least one hydraulic fracturing pump unit and an electrical fracturing blender unit with a control unit of the system;
• (b) controlling, using one or more variable frequency drives (VFDs), a plurality (N≧2) of electrical motors to drive at least one fluid pump of the at least one hydraulic fracturing pump unit;
• (c) controlling, using one or more VFDs, at least one electrical blending motor to produce a fracturing fluid from an electrical fracturing blender unit;
• and
• (d) pumping, using the at least one fluid pump driven by the plurality of electrical fracturing motors, a blended fracturing fluid down a wellbore located at the well site,
• wherein operating parameters of each of the plurality of electrical motors in step (b) are controlled based upon (i) hydraulic fracturing design parameters including target injection rate or target pressure, and (ii) measured aggregate injection rate of the pumped fracturing fluid or measured aggregate pressure.

A system for stimulating oil or gas production from a wellbore, comprising:

• (a) a hydraulic fracturing pump unit having
• a fluid pump being driven by an alternating current (AC) electrical pump motor coupled to said fluid pump, and a variable frequency drive (VFD) controlling the electrical pump motor;
• (b) an electrically powered hydraulic blender unit configured to provide treatment fluid to at least one of said one or more fluid pumps for delivery to the wellbore, wherein the blender unit comprises at least one AC electrical blending motor;
• and
• (c) a system control unit communicating with each of said hydraulic fracturing pump unit and electrically powered hydraulic blender unit, for controlling operational parameters of each of said units,
• wherein the system control unit is configured to remotely control parameters of said fluid pump of the hydraulic fracturing pump unit.