Tool for filling and backwashing oil well

A technology for backwashing wells and tools, which is applied in wellbore/well parts, cleaning tools, earthwork drilling and mining, etc. It can solve the problems of secondary or multiple filling, short sand prevention period, long production period, etc., and achieve portable Strong power, prolonging the effective period of sand control, and long effective period
CN101915071AInactive Publication Date: 2010-12-15ZHAOYUAN GOLD RIVER OIL EQUIP TECHN DEV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
ZHAOYUAN GOLD RIVER OIL EQUIP TECHN DEV
Publication Date
2010-12-15
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a tool for filling and backwashing an oil well, which is characterized in that: the middle part in a filling outer tube (1) is movable connected with a filling central tube (2), so the tool can fill the oil well for two or more times, reduce cost, shorten construction period, reduce lifting time, improve sand prevention quality, prolong sand prevention valid period, achieve a large sand prevention diameter, form a high-performance sand blocking screen, have high fluid producing intensity and carrying capacity, reduce the pollution on an oil layer and make well repair easier, and is particularly suitable for filling the oil well for multiple times and backwashing during oil field operation.
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Description

technical field

[0001] The invention relates to a tool for filling and backwashing operations in the repairing process of oil and gas wells, in particular to a tool capable of completing oil well filling and backwashing for many times. Background technique

[0002] At present, in my country's petroleum industry, with the continuous expansion of the development scale of unconsolidated sandstone reservoirs, it is necessary to frequently repair the well walls of oil wells with such geological conditions, so as to improve the success rate of sand control, extend the validity period, and reduce operating costs; Now, in the existing technology, oil well sand control operations mainly use high-pressure isolation primary filling tools. Although this tool is a leading and cutting-edge product in use in oil wells in today's oil fields in my country, it can only be used for oil wells during use. One-time filling operation cannot be filled twice or more times, and tools need to be lifted ...

Claims

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