US 4,375,833 AGranted

Automatic well treatment system

OwnerFloyd G. Meadowsinventor

Life of this patent

Estimating the term…

Loading patent…

Abstract

A system for chemical treatment of producing oil wells has automatically actuated valves operated by a control circuit. The control circuit causes the system to automatically switch the well from production to treatment status without shutting down. After a predetermined treatment period, wherein well fluids mixed with treatment chemical are recirculated throughout the well, the control circuit causes the system to change state and switch to production status. One embodiment of a means for pumping the treatment chemical into the well includes a continuous pump actuated by the mechanism of the well pump, and which includes two electrically actuated valves. The control circuit automatically operates the valves to cause treatment chemical to be injected into the well when desired, then changes the position of the valves so that the chemical which is continuously being pumped will return to the storage tank in a continuous stream.

Claims8

Dependent claims

A system for automatic chemical treatment of a producing oil well having tubing, a casing and production piping, said system comprising:

a first automatic valve coupled to the production piping;
recirculation piping coupled to the tubing and to the casing;
a second automatic valve coupled to said recirculation piping;
a pump;
treatment piping coupled to said recirculation piping and to said pump;
a first timer circuit coupled to said pump, wherein treatment chemical is pumped into the well casing only when said first timer is on, said first timer having a reset input which turns said first timer on for a first predetermined period when a reset signal is received;
a second timer circuit having a reset input which turns said second timer on for a second predetermined period when a reset signal is received;
connection means coupled to said second timer for controlling the positions of said first and second automatic valves in a manner determined by the state of said second timer;
a third timer circuit having a reset input which turns said third timer on for a third predetermined period when a reset signal is received;
and
delay means coupled to the reset inputs of said first, second and third timers for providing a reset signal to said timers when said third timer turns off.

8 more elements

Dependencies are inferred from the claim text.