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No gap adaptive scraper assembly

A scraper and self-adaptive technology, used in cleaning equipment, wellbore/well components, earth-moving drilling, etc., can solve the problems of stuck pump and scraper unable to self-adapt, so as to prolong the pump inspection period and improve comprehensive economic benefits. , the effect of simple structure

Inactive Publication Date: 2015-10-07
DAQING DAHUA HONGYE PETROLEUM ENG TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the existing scraper cannot adapt to the diameter of the pump barrel and easily causes the pump to be stuck, the present invention provides a gapless self-adaptive scraper assembly, which scrapes completely without gaps, It can adapt to pump barrels of different diameters, and the scraped dirt can flow out of the well with the well fluid to avoid pump stuck

Method used

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  • No gap adaptive scraper assembly
  • No gap adaptive scraper assembly
  • No gap adaptive scraper assembly

Examples

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with accompanying drawing:

[0017] Depend on Figure 1 to Figure 3 As shown, a gapless adaptive scraper assembly includes a connecting rod, a scraper, and a joint. The connecting rod includes an upper connecting rod 1, an intermediate connecting rod 5, and a lower connecting rod 7. The described joint includes an upper A joint 3 and an intermediate joint 6, the scraper includes an upper scraper 2 and a lower scraper 4 . Both ends of the upper joint 3 are respectively connected to the upper connecting rod 1 and the middle connecting rod 5; Oil rod, the upper scraper 2 is installed outside the upper connecting rod 1, the lower scraper 4 is installed outside the middle connecting rod 5, the upper scraper 2 can move between the lower boss of the upper connecting rod 1 and the upper joint 3, the lower The scraper 4 is movable between the upper joint 3 and the middle joint 6 . The lower part of the lower...

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PUM

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Abstract

The invention relates to a gapless self-adapting scraper assembly. The problems that existing scrapers cannot adapt to the diameter of a pump barrel and a pump is jammed easily are solved. The scraper assembly is characterized in that an upper scraper (2) is arranged outside an upper connecting rod (1), a lower scraper (4) is arranged outside a middle connecting rod (5), the lower portion of a lower connecting rod (7) is connected with a plunger (10), a leather cup (8) is arranged outside the lower connecting rod (7), a plurality of flow channels (9) are arranged on the side wall of the leather cup (8), a groove is arranged on the outer periphery of an inner mandrel (11) of the scraper, a centering supporting body (13) is embedded in the groove, a scrapping sheet (14) is fixed on the side surface of the centering supporting body (13) and a spring (15) is arranged between the centering supporting body (13) and the mandrel (11) radially. The gapless self-adapting scraper assembly can scrap completely, no gap exists, the scraper can adapt to pump barrels with different diameters, scraped dirt can flow out of a well along with well liquid and pumps cannot be jammed.

Description

technical field [0001] The invention relates to the field of oil fields, in particular to a non-gap self-adaptive scraper assembly used for oil production by three-element compound flooding rod pumps in oil fields. Background technique [0002] After the pumping well has been in operation for a long time, dirt such as cement blocks, hard wax, various salt crystals or deposits, and iron oxide produced after casing corrosion will remain on the casing, especially for ternary compound rod pumps. Well, the inner wall of the pump barrel is more prone to scaling, which needs to be removed with a scraper so that the oil pump can go into the well unimpeded. Most of the current scrapers are nylon scrapers. Due to the uneven circumferential force of the scraper, the circumferential scraping of the pump barrel is uneven, which cannot adapt to the diameter of the pump barrel, and the scraped solids tend to settle between the plunger and the pump barrel. This can lead to a stuck pump. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B37/02
Inventor 徐金超韩修廷李举辉张昊那赫楠李娟
Owner DAQING DAHUA HONGYE PETROLEUM ENG TECH
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