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Top open cage

a technology of travel valve and cage, which is applied in the direction of valve housing, positive displacement liquid engine, and wellbore/well accessories, etc., can solve the problems of breaking the cage, additional hardship for the operator, and financial and time-consuming burden on the operator of the pump

Active Publication Date: 2020-05-28
SKILLMAN MILT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these large slots compromise the structure of the cage and may result in breaking the cage.
These failures create a financial and time intensive burden on the operator of the pump.
The top open cage is also extremely difficult to extract from the down hole when the structure of the cage has been compromised, creating additional hardships for the operator.
However, with the large side slots, the ball receives many opposing forces and spins and bounces as it travels, resulting in a loss of efficiency.
Lastly, the ball does not set smoothly at the top of the inside of the cage because the top is a flat surface and the ball continues to move and disrupt the flow of resources.

Method used

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Examples

Experimental program
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Embodiment Construction

[0012]With regard to FIG. 1, a prior art top open cage is discussed further. The cage has a large diameter below the sucker rod pin and is larger than the sucker rod coupling. If the pin breaks it is unlikely that it can retrieved and / or replaced. This means the tubing must be pulled at great cost to the operator in order to repair the pump.

[0013]The cage includes long slots cut into a cage body to allow fluid flow, which weakens the structure of the cage. The slots are also highly restrictive to fluid flow. It doesn't matter how long the slots are, only how wide they are matters. This cage is run inside a pump barrel or tubing which is round so a top view of the cage is the area of flow. There is a compromise of wider slots for more flow, however this comes with less cage strength. Wider guides for greater strength results in less fluid flow.

[0014]Ball guides do not control the movement of the ball and the ball spins and bounces around on the guides as fluid passes around the ball ...

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PUM

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Abstract

A top open cage may include a first outer diameter at a bottom portion, a second outer diameter smaller than the first outer diameter at a middle portion, a third outer diameter smaller than the second outer diameter at a top portion, a chamber internal to the bottom portion and at least a portion of the middle portion, a first set of inlets from an outer surface of the middle portion to a middle section of the chamber, and a second set of inlets from an outer surface of the middle portion to the top end of the chamber. The chamber may be defined by a first inner diameter at a bottom end of the chamber and a second inner diameter smaller than the first inner diameter at a top end of the chamber.

Description

FIELD OF THE INVENTION[0001]The present invention relates to travelling valves, and more specifically, to travelling valves of down hole pumps.BACKGROUND OF THE INVENTION[0002]Down hole pumps are used for extracting various resources including oil and gas. There are many different types of down hole pumps with strengths and weaknesses found in each design. Some of these pump designs include rod pumps and tubing pumps. A cage at the top of the tube or plunger is used to actuate so that fluid may be extracted every cycle.[0003]One such cage is referred to as a top open cage. The top open cage includes large slots running down the side of the cage so that the resource can flow through the cage to a collector up stream. However, these large slots compromise the structure of the cage and may result in breaking the cage. These failures create a financial and time intensive burden on the operator of the pump. The top open cage is also extremely difficult to extract from the down hole when ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B34/08F04B47/00F16K15/18F16K27/02
CPCF16K15/183E21B34/08E21B2200/04F04B47/00F16K27/0245E21B43/126F04B53/1002F04B53/1007F04B53/16F16K15/04F16K15/1823
Inventor SKILLMAN, MILT
Owner SKILLMAN MILT