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A low-friction wellhead pumping device

A low-friction, oil-pumping technology, applied in the direction of wellbore/well components, production fluid, earthwork drilling and production, etc., can solve the problems of regular replacement, short service life, difficult to achieve oil pumping, etc., to reduce maintenance costs, Improve the application range and improve the service life

Active Publication Date: 2021-12-31
山东创新石油技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Furthermore, some oil wells will carry sand when they produce oil, and the sand will be stuck between the pipe string and the piston rod, so this structure is not suitable for oil wells that are prone to sand production, which reduces the scope of application
[0004] Furthermore, due to the non-stop friction between the piston and the pipe wall during the movement, its service life is short. After a long period of use, the gap between the piston rod and the pipe wall is large, and it is difficult to realize the oil pumping function. It needs to be replaced regularly, which increases the workload

Method used

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  • A low-friction wellhead pumping device
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  • A low-friction wellhead pumping device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] see Figure 2-5 , a low-friction wellhead pumping device, comprising an oil pipe 1, the oil pipe 1 is movably socketed with an oil extraction casing 2, the oil extraction casing 2 is movably socketed with a sucker rod 3, and the sucker rod 3 is hinged with an extrusion Part 4, the inner wall of the oil well casing 2 is fixedly installed with a limiter 5 that restricts the movement of the elastic member 6, an elastic member 6 is provided between the limiter 5 and the extruded member 4, and the surface of the elastic member 6 is provided with a one-way The one-way valve for outflow and one-way inflow, the sucker rod 3 drives the extrusion part 4 to reciprocate, and then drives the elastic part 6 to shrink and expand continuously, continuously sucking and pressing out crude oil, driving the crude oil to flow like a beating heart.

[0023] Wherein, the extruded part 4 includes an upper extruded plate 41, a connecting column 42 and a lower extruded plate 43, the connecting c...

Embodiment 2

[0029] Embodiment 2 is basically the same as Embodiment 1, except that the middle part of the limiting member 5 is provided with an oil outlet chamber communicating with the oil pipe 7, and the oil outlet chamber of the limiting member 5 communicates with the elastic members 6 at both ends. An oil inlet is provided between each elastic piece 6 and the connecting column 42, and the middle part of the connecting column 42 is provided with an oil inlet channel, and the connecting column 42 communicates with the oil pipe 1 through the oil inlet channel, and the oil inlets of the two connecting columns 42 The lower ends are provided with one-way inflow check valves, so that the two elastic members 6 can absorb and discharge oil sequentially, improving the efficiency and stability of oil discharge.

[0030] Working principle of the present invention:

[0031] In the first embodiment, the sucker rod 3 moves upward, and the volume of the lower elastic member 6 shrinks under the pressu...

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Abstract

The invention relates to the technical field of petroleum exploitation equipment, and discloses a low-friction wellhead oil pumping device, comprising an oil pipe, the oil pipe is movably connected with an oil extraction casing, and the oil suction casing is movably connected with an oil extraction casing. rod, the sucker rod is hinged with an extrusion. The low-friction wellhead pumping device uses elastic parts to simulate heart beating, suction and extrusion to drive crude oil to flow, and the elastic parts do not need to be in contact with the pipe wall, which reduces the energy consumption caused by friction and improves Secondly, because the elastic part does not contact with the pipe wall, and because the elastic part is constantly expanding and contracting, the gap between the elastic part and the pipe wall is constantly changing, and it is difficult to get stuck, so the sand contained in the oil will not affect the normal operation of the elastic part. In addition, there is almost no friction in the process, and no wear due to friction, which improves the service life of the device and reduces the maintenance cost during use.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, in particular to a low-friction wellhead oil pumping device. Background technique [0002] see figure 1 , the pumping unit drives the piston connected to the sucker rod in the pipe string to reciprocate, lifting the pump barrel and the crude oil at the bottom of the well to the ground. At the same time, in order to prevent the leakage of crude oil, the wellhead is usually equipped with a packing box. Tolerances and errors, as well as changes in shape and foundation brought about by long-term use, the moving direction and position of the sucker rod deviate from the axis, which increases the resistance and wear between the sucker rod, the piston and the pipe string, and reduces energy consumption while increasing production. When the device is out of service life. [0003] Furthermore, some oil wells will carry sand when they produce oil, and the sand will be stuck between the pipe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B43/00
CPCE21B43/121
Inventor 梅小军
Owner 山东创新石油技术有限公司