Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Non-throttling self-service unsealed packer

A non-throttle and packer technology, which is applied in the directions of sealing/isolation, production fluid, wellbore/well components, etc., can solve the problem that the pipe string cannot be pulled out, and the large-scale displacement and large-scale fracturing construction cannot be satisfied. Requirements, string difficulties, etc., to achieve good setting effect, realize large displacement and large-scale fracturing reconstruction, and improve safety

Inactive Publication Date: 2019-03-29
CNPC BOHAI DRILLING ENG
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a non-throttling self-service unpacking packer to solve the problem that the existing K344 packer needs to be set through throttling, cannot meet the needs of large displacement and large-scale fracturing construction, and the process of lowering Unnecessary setting in advance and the difficulty or failure to pull out the pipe string after pressure relief are likely to occur in the process

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
  • Non-throttling self-service unsealed packer
  • Non-throttling self-service unsealed packer
  • Non-throttling self-service unsealed packer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the following embodiments in no way limit the present invention. In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and sh...

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 non-throttling self-service unsealed packer which comprises an upper connector, an upper central pipe, a sealing mechanism, a spring central pipe, a spring self-service unsealing mechanism, a lower central pipe, a setting-dissoluble unsealing mechanism and a lower connector. No throttling or setting needs to be conducted for the non-throttling self-service unsealed packer, and the setting process is convenient to control; limiting steps are arranged in the packer, it is avoided that the sealing effect is affected by the excessive compression of a rubber cylinder; by means of the compressed rubber cylinder, the borne pressure difference is large, and the setting effect is good and stable; large-discharge and large-scale cracking construction refitting can be realized; by means of the spring self-service unsealing mechanism, unnecessary advanced setting generated in the pipe column put-down process is avoided; after cracking construction ends, the rubber cylinder of the packer is rapidly unsealed under the dual effects of the rebound force of the rubber cylinder and the self-service unsealing force of a spring; by means of the setting-dissoluble unsealing mechanism, under the high pressure in a well, the rapid unsealing of the packer can still be ensured.

Description

technical field [0001] The invention belongs to the technical field of fracturing operations in oil and gas fields, and in particular relates to a downhole packer for fracturing operations in oil and gas fields, in particular to an unthrottled self-service unpacking packer. Background technique [0002] With the deepening of domestic oil and gas field development, the K344 packer layered fracturing technology has become the main technology for vertical well layered fracturing reconstruction in domestic oil and gas fields. However, this technology also has some limitations, which restrict its further development, for example: ①The throttling set packer needs to be produced by the throttling bottom valve and the throttling sandblasting sliding sleeve, which limits the construction displacement, sand addition The volume and construction scale increase the surface pump pressure, which sacrifices the construction efficiency and cannot meet the needs of large displacement and larg...

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 Applications(China)
IPC IPC(8): E21B43/26E21B33/128
CPCE21B33/1285E21B43/26
Inventor 韩永亮冯强刘志斌郭鸣周后俊詹鸿运张鹏骆劲羽任正军王学正崔振锚张华吕双
Owner CNPC BOHAI DRILLING ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com