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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

Inactive Publication Date: 2010-12-15
ZHAOYUAN GOLD RIVER OIL EQUIP TECHN DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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 prior art, oil well sand control operations mainly use high-pressure pack-off primary filling tools. Although this tool is a leading and cutting-edge product in use in oil wells in today's oilfields 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 up during repair, the production period is long, the cost is high, the quality of sand control is poor, and the validity period of sand control is short

Method used

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  • Tool for filling and backwashing oil well
  • Tool for filling and backwashing oil well
  • Tool for filling and backwashing oil well

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The filling outer tube 1 is connected to the upper end of the filling outer cylinder 5 by threading one end of the positioning sleeve 3, and the positioning key 4 is fixedly connected to the inner wall of the positioning sleeve 3 close to the filling outer cylinder 5, and the inner wall of the filling outer cylinder 5 is welded to the filling inner cylinder 6. Connect the guide ring 7 on the outer wall of the filling outer cylinder 5. The guide ring 7 half-closes the filling hole to straighten the filling orientation when going down the well. Connect the upper sealing cylinder 9 on the inner wall of the filling inner cylinder 6 opposite to the guide ring 7. There are 3 filling holes on the filling inner cylinder 6 at the junction of the sealing cylinder 9, and there are 3 filling holes on the corresponding filling outer cylinder 6. There is a spring I8 in the upper sealing cylinder 9, and the lower end of the filling outer cylinder 5 passes through the connector 10. The ...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B33/138E21B37/10
Inventor 田庆国吕风华冯永平
Owner ZHAOYUAN GOLD RIVER OIL EQUIP TECHN DEV
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