Title:
GEL PLUGGING SLURRY FOR WELL DRILLING, PREPARATION METHOD THEREOF AND SLUG PLUGGING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/019165
Kind Code:
A1
Abstract:
Disclosed are a gel plugging slurry for well drilling, a preparation method of the plugging slurry, and a slug plugging method. The gel plugging slurry comprises water, a specialty gel, a bridging material, a jointing material and a filling material, in amounts of 1-15 parts by weight of the specialty gel, 8-20 parts by weight of the bridging material, 20-40 parts by weight of the jointing material and 25-45 parts by weight of the filling material based on 100 parts by weight of water. The gel plugging slurry has a short wait-on-cement time at rest, exhibits a rapid effect, and can quickly form a structure at fractures in a leakage formation; and the bridging material, the jointing material and the filling material can effectively plug various fractures that vary widely in width. In the slug plugging method, a packer is lowered to pack a well bore, so as to ensure that the plugging slurry can accurately reach the leakage formation and to enhance plugging efficiency.
Inventors:
BAI YANG (CN)
LUO PINGYA (CN)
DENG JIADING (CN)
LUO PINGYA (CN)
DENG JIADING (CN)
Application Number:
PCT/CN2018/096848
Publication Date:
January 30, 2020
Filing Date:
July 24, 2018
Export Citation:
Assignee:
UNIV SOUTHWEST PETROLEUM (CN)
International Classes:
C09K8/42; E21B33/13
Foreign References:
| CN104563952A | 2015-04-29 | |||
| CN105647495A | 2016-06-08 | |||
| CN101092557A | 2007-12-26 | |||
| CN103937471A | 2014-07-23 | |||
| US20140076562A1 | 2014-03-20 |
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
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