Wells – With below and above ground modification – Eduction pump or plunger in well
Patent
1984-09-26
1986-04-15
Novosad, Stephen J.
Wells
With below and above ground modification
Eduction pump or plunger in well
166902, 166310, E21B 4102, E21B 3706
Patent
active
045821313
ABSTRACT:
An electrical submersible well pump installation has a downhole secondary pump for pumping scale inhibiting chemicals below the downhole pumping assembly. The downhole pumping assembly includes a centrifugal primary pump driven by an electrical motor located below the pump and separated by a seal section for preventing well fluids from entering the motor. The secondary pump is also driven by the motor and is located between the seal section and the primary pump. The secondary pump has an intake connected to a tube that extends upwardly above the intake of the primary pump. The secondary pump has a discharge port connected to a discharge tube that extends downwardly to a point below the motor. Chemicals introduced at the surface into the annulus flow downwardly into the intake of the secondary pump and are discharged below the motor. The secondary pump has an inverted impeller and diffuser that have a discharge on the lower end for discharging fluids downwardly.
REFERENCES:
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patent: 2808111 (1957-10-01), Krueger
patent: 3335791 (1967-08-01), Patton
patent: 3548946 (1970-12-01), Engle
patent: 3901313 (1975-08-01), Doniguian et al.
patent: 4326585 (1982-04-01), McStravick
patent: 4386653 (1983-07-01), Drake
Cruise et al., "Use of Continuous Tubing for Subsurface Scale and Corosion Treating-Rangely Weber Sand Unit", SPE paper #11853, May 23-25, 1983.
Banta Derry E.
Plummer Leonard M.
Wilczek Vance A.
Bagnell David J.
Bradley James E.
Felsman Robert A.
Hughes Tool Company
Novosad Stephen J.
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