Check patentability & draft patents in minutes with Patsnap Eureka AI!

A layered water injection device for casing subsidized wells

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 the effect of improving oilfield development effect and significant economic benefits

Active Publication Date: 2016-03-09
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A layered water injection device for casing subsidized wells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

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

[0011] As can be seen from the figure, the embodiment of the present invention includes an upper faucet 3, a lower faucet 4, a sealing cylinder 5, an auxiliary pipe 6, a sleeve pipe 7, a water injection pipe 9, a fishing head 10, a dispensing body 11, an upper sealing device 12, a water distribution pipe The core 13, the lower sealing device 15, the outer sealing device 16, and the upper connecting hole 1 and the lower connecting hole 8 shot open on the casing 7, so that the upper water injection layer and the lower water injection layer are connected with the casing 7, and the casing 7 There is a damaged section on the top, and the damaged section is between the upper connecting hole 1 and the lower connecting hole 8, and the subsidizing pipe 6 is driven into the damaged section, and the sealing cylinder 5 is first installed in the subsidizing pipe 6 and then lowered in...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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 relates to a water injection tool for an oil field, which is a layered water injection tool that is lowered after the casing is subsidized at the damaged part of the casing, in particular to a layered water injection device for a casing subsidized well. Background technique [0002] After years of water injection development in water injection wells, many casings have problems such as damage and deformation. After these problems occur, the casing subsidy method should be used to subsidize the casing rupture to prevent casing leakage and enable the water injection well to continue injecting water. Casing subsidy is to put the plugging pipe under the casing rupture, pour mud between the casing and the plugging pipe, and after the mud solidifies, the casing and the plugging pipe will be consolidated into one, thereby sealing the casing rupture. The repair is complete, so that the water injection well can produce normally. Since the inner d...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com