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US 4,377,092 AGranted
Well pump jack with controlled counterbalancing
AssigneePioneer Electric Supply Co., Inc.
InventorVictor H. Garmong
Life of this patent
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AssigneePioneer Electric Supply Co., Inc.
InventorVictor H. Garmong
Estimating the term…
A deep well pump jack having a walking beam pivotally mounted on a Samson post with sucker rods depending from one end of the walking beam and a counterbalancing weight carried by the other end of the walking beam, and a prime mover is provided to rock the walking beam up and down in operation through pumping cycles. During pumping cycles, the counterbalancing weight is moved or driven in movement relative to the walking beam such that the center of gravity of the counterbalancing weight follows a vertical pattern of movement throughout each pumping cycle wherein the center of gravity travels in a substantially straight line while traveling upward and in a line of curvature directed outwardly away from the Samson pivot while traveling downward to compensate for the varying loads placed on the prime mover during each pumping cycle.
A well pumping apparatus having a Samson post, a walking beam pivotally mounted intermediate its end portions on said Samson post, means to connect a string of sucker rods to one end portion of said walking beam, a counterbalancing weight carried by the other end portion of said walking beam and connected to said walking beam for relative movement thereto, prime mover means operatively connected to said walking beam to rock said walking beam up and down on said Samson post in operation through pumping cycles, and counterbalancing weight drive means operatively connected to said counterbalancing weight to drive said counterweight in a predetermined path of movement relative to said walking beam during pumping cycles, the improvement comprising, control means to control said counterbalancing weight drive means during each pumping cycle such that the center of gravity of said counterbalancing weight is required to follow a predetermined vertical pattern of movement throughout each pumping cycle wherein the center of gravity travels in a substantially straight line while traveling upward and in a line of curvature directed outwardly away from the Samson pivot while traveling downwardly and wherein said control means is adapted to control said straight line of upward movement to be substantially vertical.
A well pumping apparatus having a Samson post, a walking beam pivotally mounted intermediate its end portions on said Samson post, means to connect a string of sucker rods to one end portion of said walking beam, counterbalancing weight means carried by the other end portion of said walking beam, a prime mover pitman crank assembly operatively connected to said walking beam to rock said walking beam up and down about the Samson pivot in operation through pumping cycles, the improvement comprising, said counterbalancing weight means including a counterbalancing weight hingedly connected to said other end portion of said walking beam for swinging movement about an axis parallel with the axis of the Samson pivot and lever arm means pivotally connecting said counterbalancing weight with said prime mover pitman crank assembly to hingedly move the center of gravity of said counterbalancing weight longitudinally relative to the Samson pivot during pumping cycles and thereby guide the center of gravity of said weight to follow a predetermined vertical pattern of movement throughout each pumping cycle of said walking beam, said lever arm means adapted in combination with said prime mover pitman crank assembly to guide said counterbalancing weight through said predetermined vertical pattern of movement wherein the center of gravity of the weight travels in a substantially straight line while traveling upward and in a line of curvature directed outwardly away from the Samson pivot while traveling downward.
A well pumping apparatus having a Samson post, a walking beam pivotally mounted intermediate its end portions on said Samson post, means to connect a string of sucker rods to one end portion of said walking beam, a prime mover, a crank arm having one end thereof connected to said prime mover for rotation in a vertical plane, a pitman post pivotally connected at one end thereof to the other end of said crank arm and a pitman pivot pivotally connecting the other end of said pitman post to said walking beam for rocking said beam up down about the Samson pivot in operation through pumping cycles, a counterbalancing weight hingedly connected to said other end portion of said walking beam for swinging movement of said weight about an axis parallel with the axis of the Samson pivot, and lever arm means pivotally connecting said counterbalancing weight with said pitman post at predetermined positions of connection without intermediate engagement thereof with said walking beam to drive said weight through a predetermined pattern of vertical movement when said walking beam is rocking through each pumping cycle.
A well pumping apparatus having a Samson post, a walking beam pivotally mounted intermediate its end portions on said Samson post, means to connect a string of sucker rods to one end portion of said walking beam, counterbalancing weight means carried by the other end portion of said walking beam, a prime mover and pitman crank assembly operatively connected to rock said walking beam up and down about the Samson pivot through pumping cycles;
The method of counterbalancing an operating well pumping apparatus having a Samson post, a walking beam pivotally mounted intermediate its end portions on said Samson post, means to connect a string of sucker rods to one end portion of said walking beam, a counterbalancing weight carried by the other end portion of said walking beam, and power means operatively connected to said walking beam to rock said walking beam up and down in operation through pumping cycles, comprising the steps of connecting said counterbalancing weight to said walking beam for relative movement thereto, and driving said counterbalancing weight relative to said walking beam during each pumping cycle such that its center of gravity follows a vertical pattern of movement throughout each pumping cycle wherein the center of gravity travels in a substantially straight line while traveling upward and in a line of curvature directed outwardly away from the Samson pivot while traveling downward, and wherein the step of driving said counterbalancing weight is characterized in that said straight line of upward movement is controlled to be substantially vertical.
Dependencies are inferred from the claim text.