US 12,085,069 B1Granted

For CPA pumping unit with end return for positioning drive

OwnerGeorge Dreherinventor

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Abstract

There are several methods to propel moving force points on a pumping unit. One of the embodiments is propulsion utilizing permanent magnets. This invention can aid the several methods and provides the push start that allows initiating permanent magnet propulsion. This invention relates to an end return device for assisting positioning drives to actuate the continuous movement by mechanical means of moving force points to a desired advantageous position at a desired advantageous moment to achieve reduced net torque when lifting or lowering an unbalanced load with a beam with a fulcrum and connected to a load and an effort. In one embodiment, a walking beam well pumping unit, the lifting and lowering of the well load can be caused by the reciprocating motion of a beam tipping on a fulcrum and with moving effort force point, moving crank shaft force point, and moving beam weight force point.

Claims12

Dependent claims

A well pump, comprising:

a walking beam;
a pair of end return devices, a first one of the end return devices disposed at a first end of the walking beam, a second one of the end return devices disposed at a second opposite end of the walking beam;
and
a propulsion device disposed on the walking beam, the propulsion device configured for lateral movement along a length of the walking beam;
wherein lateral movement of the propulsion device along the length of the walking beam laterally moves:
(1) an effort force point disposed on a tail bearing of the well pump;
(2) a crank shaft force point connected with a crank pin of a speed reducer disposed on the well pump;
and (3) a force point of a counterweight disposed on the walking beam and configured for lateral movement along the length of the walking beam;
wherein the effort force point, the crank shaft force point, and the force point of the counterweight are arranged in a structural vertical relationship on the well pump to thereby reduce an amount of torque required by the well pump for its pumping operations;
and
wherein each one of end return devices is configured to perform at least one of:
(1) initiate forward lateral movement of the propulsion device along the length of the walking beam;
(2) initiate reverse lateral movement of the propulsion device along the length of the walking beam;
(3) decelerate lateral movement of the propulsion device along the length of the walking beam;
or (4) stop lateral movement of the propulsion device along the length of the walking beam.

12 more elements

A well pump, comprising:

a walking beam;
a pair of end return devices, a first one of the end return devices disposed at a first end of the walking beam, a second one of the end return devices disposed at a second opposite end of the walking beam;
and
a propulsion device disposed on the walking beam, the propulsion device configured for lateral movement along a length of the walking beam;
wherein each one of the end return devices comprises:
means for one or more of starting and stopping lateral movement of the propulsion device along the length of the walking beam;
and
means for one or more of push starting and braking and stopping lateral movement of the propulsion device along the length of the walking beam;
and
wherein the propulsion device is configured to laterally move:
(1) an effort force point disposed on a tail bearing of the well pump;
(2) a crank shaft force point connected with a crank pin of a speed reducer disposed on the well pump;
and (3) a force point of a counterweight disposed on the walking beam;
and
wherein the effort force point, the crank shaft force point, and the force point of the counterweight are arranged in a structural vertical relationship on the well pump to thereby reduce an amount of torque required by the well pump for its pumping operations.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/512,541Filed 27 Oct 2021 · continuation
Priority: 1 Jan 2021
Granted: 10 Sep 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F04B 47/022
The driving mechanisms being situated at ground level: driving of the walking beam
E21B 43/127
Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive: adaptations of walking-beam…
F04B 47/028
The driving mechanisms being situated at ground level: details of the walking beam
F04B 49/065
Control using electricity: and making use of computers