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

A plugging method of rice stone filling trailing packer with cement injection

A plugging method and packer technology, which are applied in the field of oil drilling to achieve the effects of improving matching ability, strong on-site operability, and slowing down flow rate

Active Publication Date: 2015-10-28
CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a plugging method of rice stone filling trailing packer with cement injection, aiming at the shortage of directly using cement plugging technology, adding rice stone slurry before cement plugging construction to ensure the completion of plugging construction

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] A kind of rice stone filling trailing packer cement injection plugging method, the method is to inject rice stone slurry before cement plugging, and its specific implementation steps are as follows:

[0035] Step 1, the bare drill pipe is lowered to a packer; the differential pressure packer is fixedly installed at the lower end of the bare drill pipe, and the bare drill pipe is lowered to 100 meters above the leakage zone.

[0036] According to the sensitivity of the rubber plug of the packer to the pressure difference and the construction situation, the diameter of the water hole of the packer is reasonably selected, and the diameter of the water hole is generally 25-30 mm.

[0037] Step 2, configure rice stone slurry; according to the formula polymer gel GD-3: barite powder: bridging agent: rice stone: water is 1:20:10-15:20:100 to configure rice stone slurry, the above All are measured by weight, and the unit is KG.

[0038] The configuration process is as follows:...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of oil drilling, and relates to a method for realizing plugging by granulated stone filling and follow-up cementing on a packer. The method is characterized in that granulated stone slurry is poured into before cement plugging and prepared according to a formula of polymer gel GD-3, blanc fixe, a bridge plug agent, granulated stone and water in a weight ratio of being 1:20:(10-15):20:100, and the weight unit is KG; and simultaneously, the whole construction process is performed according to steps as follows: the lower part of a light drilling rod is connected with the packer; the granulated stone slurry is prepared; the granulated stone slurry is pumped; cement plugging is performed; cement paste is replaced with water; concretion is waited before a drill is pulled out; the drill is pulled out; a cement plug is drilled. The method aims to overcome defects existing in a plugging technology by directly using cement, and the granulated stone slurry is added before the cement plugging is constructed so as to guarantee completion of the plugging construction.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, and relates to a plugging method for cementing a trailing packer filled with rice stone. Background technique [0002] The buried depth of the Jurassic Luohe Formation in Xifeng Oilfield, Longdong block, Changqing is 700-1200m, with well-developed vertical and horizontal fractures, which are prone to return loss. In some areas, there are vertical fracture fracture zones in the Luohe formation, generally with a length of 1 -5 meters, the main feature is that when drilling in the vertical fracture fracture zone, the drill bit cannot be pressurized, and there is also a phenomenon that the drill bit cannot be pressurized in multiple sections. For this type of well, conventional bridge plugging and cement slurry plugging are basically ineffective. , need to fill more gravel combined with grouting to be effective. The success rate of plugging is less than 20%. The main influencing factors ar...

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): E21B33/13
Inventor 吴付频张迁张建卿王伟良
Owner CHINA NAT PETROLEUM CORP CHUANQING DRILLING ENG CO LTD
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