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Separate layer water injection device for casing pipe patching well

A technology of layered water injection and casing subsidy, which is applied in wellbore/well components, production fluids, earth-moving drilling, etc. Tools can not be used and other problems, to achieve significant economic benefits and improve the effect of oilfield development

Active Publication Date: 2014-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary layered water injection tools cannot be used due to the smaller inner diameter of the casing subsidized
Therefore, casing subsidized wells cannot perform layered water injection, which affects oilfield water injection and oil recovery

Method used

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  • Separate layer water injection device for casing pipe patching well

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Embodiment Construction

[0010] Embodiments of the present invention will be described below in conjunction with the accompanying drawings:

[0011] As can be seen from the figure, the embodiment of the present invention includes an upper water nozzle 3, a lower water nozzle 4, a sealing cylinder 5, a subsidy pipe 6, a casing 7, a water injection pipe 9, a salvage head 10, a dispensing body 11, an upper sealing device 12, and water distribution. The core 13, the lower sealing device 15, the outer sealing device 16, and the upper communication hole 1 and the lower communication hole 8 are shot on the casing 7, so that the upper water injection layer and the lower water injection layer are communicated with the casing 7. There is a damaged section on the upper part, and the damaged section is between the upper communication hole 1 and the lower communication hole 8, and the subsidy pipe 6 is inserted into the damaged section. Inside, the dispensing body 11 is connected to the lower part of the water inj...

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Abstract

The invention discloses a separate layer water injection device for a casing pipe patching well. A casing pipe is provided with an upper communicating hole and a lower communicating hole in a jetted mode. A patching pipe is driven into a damaged section of the casing pipe. A sealing cartridge is installed in the patching pipe first, and then is placed into the casing pipe along with the patching pipe. A separate injection body is connected to the lower portion of a water injection pipe first, and then is placed into the sealing cartridge along with the water injection pipe. An external sealing device is arranged between the separate injection body and the sealing cartridge. The separate injection body is provided with a communicating groove. The communicating groove is located above the external sealing device. An upper water nozzle is transversely installed in the middle of a water distribution core. A lower water nozzle is installed on the lower portion of the water distribution core. The upper water nozzle and the lower water nozzle are communicated with the inside of the water distribution core. An upper sealing device and a lower sealing device are installed on the water distribution core. The upper sealing device is located above the upper water nozzle. The lower sealing device is located below the upper water nozzle. After the water distribution core is placed into the separate injection body, the upper sealing device is located above the communicating groove, and the lower sealing device is located below the communicating groove. Separate layer water injection is realized through throttle control over the water distribution core, the upper water nozzle and the lower water nozzle, and then a water injection layer can meet the requirement for injection allocation.

Description

technical field [0001] The invention is an oil field water injection tool, which is a layered water injection tool which is run after casing subsidy is carried out at the damaged casing, and in particular is a layered water injection device for casing subsidized wells. Background technique [0002] After years of water injection development in water injection wells, many casings have problems such as damage and deformation. When these problems occur, the casing subsidy method should be used to subsidize the ruptured casing to prevent leakage of the casing, so that the water injection well can continue to inject water. Casing subsidy is to place the plugging pipe under the casing rupture, and pour the mud between the casing and the plugging pipe. Repaired well, so that the injection well can be produced normally. Because the inner diameter of the casing becomes smaller after the casing is subsidized, the ordinary layered water injection tool cannot be used. Therefore, casi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/20
Inventor 田冰高国强谢文献肖坤崔洁刘全国许建华郝风波张莹孙双立张丽王青潘真
Owner CHINA PETROLEUM & CHEM CORP
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