Nelson B Escue

US Patent:

51939851, Mar 16, 1993

Filed:

Nov 9, 1990

Appl. No.:

7/611186

Inventors:

Nelson Escue - La Mesa CA
Vance E. Bolding - Huntington Beach CA
Howard C. Hornsby - West Palm Beach FL

Assignee:

UniFlo OilCorp, Ltd. - La Mesa CA

International Classification:

F04B 4706
F04B 4906

US Classification:

417 53

Abstract:

A new and improved control system for monitoring and controlling the operation of a downhole linear d. c. motor-pump assembly and a method of using it for producing a sufficient reciprocating pumping action to lift well fluid through the producing tubing of a well to the ground surface. The system includes a surface monitoring station that is in radio communication with a plurality of remote downhole motor-pump assemblies. Each motor-pump assembly has a surface motor controller, a downhole motor-pump cartiridge unit that is adapted to be received in a downhole cartridge sleeve assembly that maintains the cartridge unit in a stationary position for pumping purposes. The motor-pump cartridge unit may be raised or lowered by a control cable within the production tubing for helping to facilitate the repair or replacement of the motor-pump cartridge unit. The motor-pump assembly also includes a plurality of sensors for monitoring the conditions of the well downhold as well as the efficiency of the motor-pump cartridge unit.

US Patent:

50490460, Sep 17, 1991

Filed:

Jan 10, 1990

Appl. No.:

7/462833

Inventors:

Nelson B. Escue - La Mesa CA
Vance E. Bolding - Huntington Beach CA
Howard C. Hornsby - West Palm Beach FL

Assignee:

Escue Research and Development Company - San Diego CA

International Classification:

F04B 4706

US Classification:

417411

Abstract:

A new and improved control system for monitoring and controlling the operation of a downhole linear d. c. motor-pump assembly and a method of using it for producing a sufficient reciprocating pumping action to lift well fluid through the producing tubing of a well to the ground surface. The system includes a surface monitoring station that is in radio communication with a plurality of remote downhole motor-pump assemblies. Each motor-pump assembly has a surface motor controller, a downhole motor-pump cartridge unit that is adapted to be received in a downhole cartridge sleeve assembly that maintains the cartridge unit in a stationary position for pumping purposes. The motor-pump cartridge unit may be raised or lowered by a control cable within the production tubing for helping to facilitate the repair or replacement of the motor-pump cartridge unit. The motor-pump assembly also includes a plurality of sensors for monitoring the conditions of the well downhole as well as the efficiency of the motor-pump cartridge unit.