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Connecting mechanism of oil well pump delivery valve

A connection mechanism, oil outlet valve technology, applied in the direction of parts, pump elements, mechanical equipment, etc. of pumping devices for elastic fluids

Inactive Publication Date: 2014-09-10
CHENGDU GAOPU PETROLEUM ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Impurities are stuck, free rotation is limited, and the diameter of the threaded part between the pull rod and the oil outlet valve is the smallest, so relative rotation will occur first, and then slowly retreat after loosening buckle, causing the oil outlet valve to be separated from the pull rod

Method used

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  • Connecting mechanism of oil well pump delivery valve
  • Connecting mechanism of oil well pump delivery valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as Figure 1-2 As shown, the present invention includes an oil sucking rod 1, a pressure cap 2, a fixed nut 3, a hexagonal fixed sleeve 4 and an oil outlet valve 7, the small end of the oil outlet valve 7 is covered with a hexagonal fixed sleeve 4, and the hexagonal fixed sleeve 4 can Slide left and right; one end of the oil pump rod 1 is sequentially covered with a fixed nut 3 and a pressure cap 2, which is located between the pressure cap 2 and the hexagonal fixed sleeve 4, the pressure cap 2 is milled into a hexagonal shape, and one end of the fixed nut 3 is The car has an annular groove, which is welded on the oil sucking rod 1 as a welding cavity. The inside and outside of the hexagonal fixing sleeve 4 are hexagonally milled, and the small end of the oil outlet valve 7 and the fixing nut 3 are located in the hexagonal fixing sleeve 4. .

[0021] When connecting, first screw the pressure cap into the oil sucker rod, then install the lock nut and adjust it to t...

Embodiment 2

[0023] The preferred specific structure of this embodiment on the basis of Embodiment 1 is as follows: the outer surface of the small end of the oil delivery valve 7 is a hexagonal structure, the outer hexagonal structure of the small end of the oil delivery valve 7, the outer hexagonal structure of the fixing nut 3 and the hexagonal structure inside the hexagonal fixing sleeve 4 The structures are of equal size. It is convenient to snap both the fixing nut and the oil outlet valve into the hexagonal fixing sleeve.

Embodiment 3

[0025] This embodiment adds the following technical features on the basis of the above embodiments: the oil outlet valve 7 is also provided with a movable joint 5 .

[0026] The movable joint 5 includes left and right joints and a collar 6 connected between the left and right joints. After the coupling connects the left and right joints, the left and right joints can rotate freely. When the plunger is stuck with the pump barrel, it cannot rotate freely, but the movable joint can rotate freely, so as to ensure the effective connection of the thread and prevent the loosening of the sucker rod and the oil delivery valve. The structure is simple, reliable, reliable without change, does not change the parameters of the working structure, does not affect the work, can be disassembled repeatedly, is easy to process and manufacture, and is convenient for on-site assembly.

[0027] The outer surface of the sucker rod 1 is provided with threads.

[0028] One end of the hexagonal fixin...

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Abstract

The invention discloses a connecting mechanism of an oil well pump delivery valve. The connecting mechanism comprises an oil pumping pull rod (1), a pressing cap (2), a fixed screw cap (3), a hexagonal fixing sleeve (4) and the delivery valve (7), the small end of the delivery valve (7) is sleeved with the hexagonal fixing sleeve (4), and the hexagonal fixing sleeve (4) can slide left and right. One end of the oil pumping pull rod (1) is sequentially sleeved with the fixed screw cap (3) and the pressing cap (2), the oil pumping pull rod (1) is located between the pressing cap (2) and the hexagonal fixing sleeve (4), the pressing cap (2) is milled to be hexagonal, an annular groove is turned in one end of the fixed screw cap (3) and is welded to the oil pumping pull rod (1) as a welding cavity, the interior and the exterior of the hexagonal fixing sleeve (4) are respectively milled to be hexagonal, and the small end of the delivery valve (7) and the fixed screw cap (3) are both located in the hexagonal fixing sleeve (4). Through the structure, the delivery valve and the oil pumping pull rod are not prone to being loosened and separated, the structure is simple and reliable, the work structure parameter is not changed, the connecting mechanism can be repeatedly dismounted, machining and manufacturing are easy, and on-site assembling is facilitated.

Description

technical field [0001] The invention relates to the field of valves, in particular to a connection mechanism for an oil outlet valve of an oil pump. Background technique [0002] In the process of mechanical oil recovery in the oil field, it is often encountered that the oil well pump does not produce oil. The existing way of connecting the oil outlet valve and the pull rod of the oil well pump is to screw the lock nut into the threaded end of the pull rod longer than the thread length of the valve, and then thread the small end of the oil outlet valve to the pull rod. When it is connected to the predetermined position, Return the locking nut and tighten it to form a prestressed lock. The lower end of the oil outlet valve adopts a double-ended threaded joint to connect the valve with the plunger. When working, due to the pulling effect of the tie rod, the threaded part of the tie rod will be deformed, and the locking effect of the prestressed force will soon lose the lockin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/10
Inventor 周斌
Owner CHENGDU GAOPU PETROLEUM ENG TECH
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