Pumping-assisting centering dropout prevention device of pumping rod

A sucker rod and centralizer technology, used in drill pipes, cleaning appliances, drilling equipment, etc., can solve the problems of single structure and function, can not fully meet the needs of oil production, and achieve reasonable structure, reduce leakage, and reduce recovery. effect of stress

CN101824971AInactive Publication Date: 2010-09-08LIAONING JIANGCHENG GASOLINEEUM TECH SERVICE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2010-09-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a pumping-assisting centering dropout prevention device of a pumping rod, comprising an upper pumping rod joint (1), a dropout prevention connecting rod (2), a movable joint (3), a seal cover (5), an oil passing valve (6), a centering device (7) and a lower pumping rod joint (8), wherein the lower end of the dropout prevention connecting rod (2) is glidingly and rotatably matched with the movable joint (3) to form the dropout prevention device; the excircle of the movable joint (3) is provided with a helical tooth (31) to form a paraffin scraper; and the seal cover (5) and the oil passing valve (6) are matched and penetrated through a connecting rod (4) to form a pumping-assisting device. The dropout prevention device is distributed on the pumping rod at intervals for use, lowers the return pressure of an oil-well pump, reduces loss and improves the work efficiency of the oil-well pump while playing the preventing dropout and centering effects on the pumping rod and the paraffin removal effect on oil tubes.
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Description

technical field

[0001] The invention relates to a sucker rod straightening, detachment prevention, wax scraping and pumping aid device connected to the sucker rod of an oil production well in an oil field. Background technique

[0002] The prior art centralizer is a bump-type slider whose outer diameter is much smaller than that of the well pipe of an oil well. When the sucker rod is running up and down, especially in inclined wells and directional wells, it prevents the eccentricity of the sucker rod from directly rubbing against the well pipe. The wax scraper is used to remove the wax on the well pipe, and the wax scraper is a piece structure. The anti-loosening device is a kind of joint, which is used to prevent the threaded buckle of the sucker rod from loosening. In the prior art, the centralizers, detachment preventers, and wax scrapers connected to the sucker rods have a single structure and function, and they are separately connected to the sucker rods, which cannot...

Examples

Embodiment Construction

[0010] The present invention is made up of oiling rod joint 1, anti-loosening connecting rod 2, live joint 3, connecting rod 4, sealing cover 5, oil passage valve 6, centralizer 7 and lower oiling rod joint 8, the anti-loosing connecting rod 2 wears Installed in the inner hole of the joint 3, the upper end of the anti-off connecting rod 2 is connected with the internal thread interface of the oiling rod joint 1, and the lower end of the anti-off connecting rod 2 passes through the shaft shoulder and the stop provided in the inner hole of the joint 3. The mouth 30 is connected with sliding rotation; 3-4 helical teeth 31 are provided on the outer circle of the movable joint 3 to form a wax scraper; the upper end of the connecting rod 4 is connected with the internal thread interface at the lower end of the movable joint 3, and the sealing cover 5 is worn Installed on the connecting rod 4 and slidingly matched with the connecting rod 4, the oil passage valve 6 is mounted on the co...