CEMENTING WORKING FLUID PREPARED BY USING RED MUD, SLAG AND WASTE DRILLING FLUID

WIPO Patent Application WO/2019/153646

A1

A cementing working fluid prepared by using red mud, slag and a waste drilling fluid, consisting of the following components in parts by weight: 100 parts of a waste drilling fluid; 50-100 parts of slag; 5-50 parts of red mud; 4-7 parts of a suspension stabilizer; 1-7 parts of an activation agent; 0.5-5 parts of an anti-pollution agent; 0.4-3.5 parts of a diluent. The waste drilling fluid is a waste water-based drilling fluid, the slag is blast furnace slag or vanadium-titanium slag, the suspension stabilizer is sodium-based bentonite, carboxymethyl cellulose or a mixture thereof, the activation agent is sodium silicate nonahydrate, sodium carbonate, or a mixture thereof, the anti-pollution agent is sodium salicylate, potassium citrate or a mixture thereof, and the diluent is sodium lignosulfonate. The working fluid is suitable for oil and gas well cementing in low-abundance and low-pressure blocks that leak easily.

CHENG XIAOWEI (CN)
LONG DAN (CN)
MEI KAIYUAN (CN)
LIU KAIQIANG (CN)
ZHANG GAOYIN (CN)
ZHAO FENG (CN)
YANG YONGSHENG (CN)
ZHANG CHUNMEI (CN)
LI ZAOYUAN (CN)
ZHANG XINGGUO (CN)
GUO XIAOYANG (CN)

PCT/CN2018/095587

August 15, 2019

July 13, 2018

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UNIV SOUTHWEST PETROLEUM (CN)

C09K8/467

CN105925254A	2016-09-07
JPS5725382A	1982-02-10
CN101037592A	2007-09-19
CN102660240A	2012-09-12

CHENGDU JINYING PATENT FIRM (CN)

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