RONNIE M BROWN
Electrician in Fort Worth, TX
License number
Texas 30833
Expiration Date
Aug 19, 2017
Category
Master Electrician
Address
Address
PO Box 8223, Fort Worth, TX 76124
Phone
(817) 825-1383
Professional information
Method And Apparatus For Variable Speed Control Of Oil Well Pumping Units
US Patent:
5251696, Oct 12, 1993
Filed:
Apr 6, 1992
Appl. No.:
7/863838
Inventors:
James R. Boone - Grand Prairie TX
Larry D. Best - Springtown TX
Ronnie D. Brown - North Richland Hills TX
Larry D. Best - Springtown TX
Ronnie D. Brown - North Richland Hills TX
International Classification:
E21B 4312, F04B 4900, F04B 4906
US Classification:
166250
Abstract:
A method and apparatus for Varying the speed of operations of an oil well pumping unit powered by a motor wherein variations in oil viscosity may be efficiently accommodated. An oil well pumping unit which includes a submersible pump actuated by means of a reciprocating string of sucker rods is monitored for both rod position and load present on the sucker rods. The oil well pumping unit is driven by an electric or gas motor through a controllable coupling and the speed of the oil well pumping unit is then varied, utilizing the controllable coupling, in response to variations in sucker rod load. As the lowering of the sucker rod is impeded by high viscosity oil, the load on the sucker rod decreases. This decrease in sucker rod load is utilized to decrease the speed of the oil well pumping unit by means of the controllable coupling to ensure that bridle separation does not occur. Additionally, increases in sucker rod load above a preselected maximum may also be detected and utilized to slow the operation of the oil well pumping unit to prevent damage to the sucker rods.