Title:
NANO SELF-LOCKING BENTONITE FILM-FORMING AGENT, PREPARATION METHOD THEREFOR, AND FILM-FORMING DRILLING FLUID
Document Type and Number:
WIPO Patent Application WO/2023/201867
Kind Code:
A1
Abstract:
The present invention relates to the technical field of functional materials, and a nano self-locking bentonite film-forming agent, a preparation method therefor and a film-forming drilling fluid. The method comprises: (1) subjecting bentonite and an acid to chemical cleavage; (2) bringing the cleaved nano bentonite in contact with an aqueous sodium chloride solution and a long-chain polymer material; (3) mixing the resulting low-dimensional nano self-locking bentonite, nano bentonite and water, and then adding a structural bonding agent dropwise; (4) introducing a trichloromethane solution, a 2,2'-bipyridine matching solution, and a p-xylene solution, and then adding an N,N,N',N",N"-pentamethyldiethylenetriamine cross-linking agent to carry out a constant-temperature free reaction; and (5) carrying out cleaning, centrifugation and drying treatment by using a mixed solution of trichloromethane and methanol to obtain a nano self-locking bentonite film-forming agent. The film-forming agent forms an effective isolation barrier in microscopic pores inside and outside a target rock stratum to prevent external moisture from invading the inside of the rock stratum.
Inventors:
DONG WENXIN (CN)
PU XIAOLIN (CN)
FAN JINYANG (CN)
LIU WENHAO (CN)
CHEN SIYI (CN)
WANG HANYI (CN)
JIANG DEYI (CN)
CAO YI (CN)
CHEN JIANJUN (CN)
GE YAO (CN)
SUN JINSHENG (CN)
CHEN WEI (CN)
HAN TAO (CN)
XIAO JINGWEN (CN)
PU XIAOLIN (CN)
FAN JINYANG (CN)
LIU WENHAO (CN)
CHEN SIYI (CN)
WANG HANYI (CN)
JIANG DEYI (CN)
CAO YI (CN)
CHEN JIANJUN (CN)
GE YAO (CN)
SUN JINSHENG (CN)
CHEN WEI (CN)
HAN TAO (CN)
XIAO JINGWEN (CN)
Application Number:
PCT/CN2022/099208
Publication Date:
October 26, 2023
Filing Date:
June 16, 2022
Export Citation:
Assignee:
UNIV SOUTHWEST PETROLEUM (CN)
UNIV CHONGQING (CN)
SICHUAN XINLIN NEW MATERIAL TECH CO LTD (CN)
UNIV CHONGQING (CN)
SICHUAN XINLIN NEW MATERIAL TECH CO LTD (CN)
International Classes:
B28C1/10; C09K8/02; C09K8/03
Domestic Patent References:
| WO2019232578A1 | 2019-12-12 |
Foreign References:
| CN109809425A | 2019-05-28 | |||
| CN109837075A | 2019-06-04 | |||
| CN110396151A | 2019-11-01 | |||
| CN109837072A | 2019-06-04 | |||
| CN114106796A | 2022-03-01 |
Other References:
DONG WENXIN; PU XIAOLIN; ZHAI YUFEN: "A self-gating membrane for reservoir protection based on irreversible thermoresponsive bentonite layer structures", APPLIED CLAY SCIENCE, ELSEVIER, AMSTERDAM, NL, vol. 211, 10 June 2021 (2021-06-10), AMSTERDAM, NL , XP086698815, ISSN: 0169-1317, DOI: 10.1016/j.clay.2021.106175
Attorney, Agent or Firm:
RUNPING & PARTNERS (CN)
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