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Lever oil pump capable of eliminating eccentric wear and directly flushing well

An oil pump and positive washing technology, applied in the field of high-efficiency and energy-saving rod oil pump, can solve the problems of not eliminating eccentric wear, not having, not having positive flushing, etc., and achieve the effect of eliminating eccentric wear and eliminating bending

Inactive Publication Date: 2008-07-16
凌建军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] But this kind of pump, like the conventional oil well pump, does not eliminate eccentric wear, does not have the function of positive well washing, and does not have the function of injecting steam or hot water from the tubing, that is, injecting steam or hot water from the oil well, and then injecting steam or hot water from the oil well. It also has the function of returning from the annular space of the sleeve; it also does not have the function of injecting other fluids from the oil pipe, and cannot generate hydraulic feedback downward force. Like the conventional large pump, the oil drainer must be used to ensure that no crude oil pollutes the wellhead during operation.

Method used

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  • Lever oil pump capable of eliminating eccentric wear and directly flushing well
  • Lever oil pump capable of eliminating eccentric wear and directly flushing well
  • Lever oil pump capable of eliminating eccentric wear and directly flushing well

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Effect test

no. 1 approach

[0019] figure 2 It is a schematic diagram of the first embodiment of a rod well pump that can eliminate eccentric wear and can flush wells in the present invention. The rod well pump that can eliminate eccentric wear and can clean the well includes a sucker rod 21, a casing 22, a fluid surface 23, a tubing 24, a disconnecting mechanism 25, a pull rod 26, a long plunger 27, and a short pump barrel 28 , fixed valve 29, fixed valve base expansion pipe 30, long pump barrel 31, formation 32, pump cavity 33, pump barrel lower diameter expansion pipe 34, short plunger support 35 with flow passage, artificial well bottom 36, short Plunger lower end surface 37, short plunger 38, floating valve 39, fixed valve channel 40, fixed valve seat 41. The upper part of the long pump barrel 31 is connected with the expansion tube 30 of the fixed valve base, and the lower part is connected with the expansion tube 34 of the lower part of the pump barrel; the fixed valve seat 41 is located at the ...

no. 2 approach

[0035] Figure 4 It is a schematic diagram of the normal oil pumping situation according to the second embodiment of the present invention, Figure 5 It is a schematic diagram of positive injection in the second embodiment of the present invention. From Figure 4 , 5 It can be seen that the second embodiment only changes the pull rod 26. Compared with the first embodiment, the pull rod 26 of the second embodiment no longer requires the diameter of the pull rod to be reduced, but the pull rod 26 is provided with a Groove 261, its slotting length will be greater than the length of short pump barrel 28, so that there is a fluid flow channel between the pull rod 26 and the short pump barrel 28, providing a fluid flow channel for positive well washing, positive injection and oil drainage.

[0036] The following analyzes how this embodiment eliminates the eccentric wear phenomenon. To eliminate the eccentric wear phenomenon in this embodiment, it is enough to ensure that the dia...

no. 3 approach

[0038] Figure 6 It is a schematic diagram of the normal oil pumping situation according to the third embodiment of the present invention, Figure 7 It is a schematic diagram of positive injection in the third embodiment of the present invention. From Figure 6 , 7 It can be seen that the third embodiment also changes the pull rod. Compared with the first embodiment, the pull rod 26 of the third embodiment no longer requires the diameter of the pull rod to be reduced, but opens the center on the pull rod. Hole 263 and open vertical hole 262,264 at the top and bottom of pull rod, vertical hole 262,264 communicates with center hole 263, the distance of upper and lower vertical hole 262,264 is greater than the length of short pump cylinder 28, makes the hole on the pull rod 262, 263, 264 become fluid flow channels, thereby providing fluid flow channels for positive well washing, positive injection and oil drainage.

[0039] The following analyzes how this embodiment eliminate...

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Abstract

The invention discloses a rod-typed oil pump which can eliminate the partial abrasion and has positive well cleanout function, comprising a disconnecting / connecting mechanism, a pulling rod, a long piston, a short pump cylinder, a fixed valve, a fixed valve base expanded pipe, a long pump cylinder, a short piston, a floating valve, a pump cylinder lower expanded pipe, and a short piston supporter with a flow passage. The fixed valve is arranged above the long pump cylinder; the short piston is arranged inside the long pump cylinder and below the fixed valve; the floating valve is arranged on the short piston; the diameter of the pulling rod is less than that of the long piston; the pump cylinder lower expanded pipe is longer than the diameter of the long pump cylinder. The invention can eliminate the partial abrasion of the oil rod and can achieve the positive well cleanout without moving a pipe string.

Description

Technical field [0001] The invention relates to a rod oil well pump in an oil field, in particular to a high-efficiency energy-saving rod oil well pump capable of eliminating eccentric wear, positively flushing wells, positively injecting steam, and automatically draining oil. Background technique [0002] From the statistical data of all oil fields in the world, about 80% of the oil wells are produced by the rod pump pumping unit, and 92% of the oil wells in China use the rod pump pumping unit. However, at present, there are problems such as serious eccentric wear of the sucker rods, inability to clean wells and low system efficiency in wells with rod pumps. [0003] For example, oil fields such as Daqing and Shengli have to put centralizers on the sucker rods in order to solve the problem of eccentric wear of the sucker rods. Because the centralizers have resistance during the downward process, the position of the eccentric wear moves upwards, so the whole well has to be c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B47/02F04B53/14F04B53/10F04B53/02E21B43/24E21B37/00
Inventor 凌建军黄鹂
Owner 凌建军
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