Paul W. Pigue
Engineering at Houston St, Richmond, TX
License number
Louisiana PE.0006850
Issued Date
Feb 17, 1959
Category
Civil Engineer
Type
Petroleum Engineer
Address
Address
605 Houston St, Richmond, TX 77469
Professional information
Flow Responsive Time Delay Pump Motor Cut-Off Logic
US Patent:
5819848, Oct 13, 1998
Filed:
Aug 14, 1996
Appl. No.:
8/696632
Inventors:
Gordon L. Rasmuson - Abilene TX
Paul Pigue - Richmond TX
Paul Pigue - Richmond TX
Assignee:
Pro Cav Technology, L.L.C. - Richmond TX
International Classification:
E21B 4700
US Classification:
16625015
Abstract:
An automatically controlled fluid flow responsive method for achieving de-energization of an electric motor operatively connected with a downhole pump being connected to a production tubing string of a well when flow from the downhole pump becomes abnormally low. A selective electronic cut-off signal is programmed, representing a selected minimum acceptable rate of discharge flow from the downhole pump. A flow transducer provides an electronic flow related signal to the control circuitry, representing actual pump discharge flow. The control circuitry is also programmed with a selected electronically controlled time delay period which is initiated when the flow related signal becomes less than the selective cut-off signal. When the flow related signal remains less than the cut-off signal for the duration of the time delay period the control circuitry interrupts the electrical power supply to the pump motor. The time delay motor cut-off control logic is provided with an adjustable "set flow" logic and an adjustable "cut-off delay" logic which establish parameters of allowable minimum pump discharge flow and the time period that the pump will be allowed to operate below a preset minimum allowable flow rate.