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Well pump control
| Details |
Inventors: Sullivan, Robert E.;
Assignee:
Primary Examiner: Freeh; William L.
Assistant Examiner:
Attorney, Agent or Firm: Fulbright & Jaworski
A pump control comprising a control circuit having a timer which periodically closes the control circuit and hence an energizing electric circuit to an electric motor driving the pump, for predetermined intervals of time, and a float assembly having a vertically movable float surrounded by a vertical guide and shield having openings adjacent its bottom. Inlet and outlet lines extend upwardly through its bottom and establish an upward liquid level in the float chamber and provide support. A reduced flow drain line at the bottom of the float chamber drains liquid to establish a lower liquid level. A removable top closes the float chamber, which top carries a switch actuated by a float stem extending through it so that movement of the float in response to liquid levels closes the control circuit and thus the energizing circuit to the electric motor and opens the circuit to the timer when the float is in an upper position, and opens the control circuit to the energizing circuit to the motor and closes the circuit to the timer when the float is in a lower position. The float is located out of the path of fluid flowing into and through the float chamber and is shielded by the vertical guide so that surges or flow of gas do not affect operation of the float. |
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DETAILED DESCRIPTION OF PRESENTLY-PREFERRED EMBODIMENTS OF THE INVENTION Referring now to the drawing, the reference numeral 10 generally illustrates a typical pumping assembly which includes the pump gear box 1, which drives the crank arm 2 having the counter-balance 3 at its outer end, which crank arm 2 drives the pittman 4, which in turn, drives the walking beam 5 supported by the standard 6, which causes the horse's head 7 to be swung upwardly and downwardly thereby raising and lowering the cable 8 attached to the sucker rod string 12 extending through the well head connection 14 into the cased well 16.
The sucker rod string 12 extends downwardly into the cased well 16 and has the usual pump members attached to it so that as the sucker rod string 12 is reciprocated, it pumps liquid from the well 16 into the well head connection 14 and out the horizontally-disposed discharge line 18.
No more detailed description of the pumping assembly is given or deemed necessary as the pump control of the present invention may be utilized on any type of pumping assembly that is driven by an electric motor and the pump assembly illustrated in the drawing is typical and representative and is given for purposes of illustration.
The pump control is generally designated by the reference numeral 27.
For purposes of clarity of and to shorten the disclosure, various nuts, bolts and connecting parts are not shown, and the pump control is generally shown in schematic form.
It will be understood, of course, that the various parts of the pump control assembly are connected together, can be disconnected for assembly and disassembly, and in the commercial practice parts are removably connected together so that the pump control assembly 27 may be readily secured to the discharge line 18, the control can be assembled and can be disassembled for repairs, replacement, cleaning, servicing and the like.
The pump control includes a generally cylindrical float body 28 removably closed by the top cover 30 by connecting members, not shown, to form the generally cylindrical float chamber 32
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