Southwest Petroleum University

Wen Xu

Yang Bai

Pingya Luo

Lingfeng Wu

Jing Zhang

Wenzhe Li

Haibo Liang

Gang Xie

Feng Dai

Jiading Deng

Daoxiong Li

Guancheng Jiang

Jinsheng Sun

Jingping Liu

Ren Wang

Dezhi Liu

Kesheng Rong

The present disclosure a leak-proof lost-circulation control water-based drilling fluid composition and preparation method and use thereof.

Leak-proof lost-circulation control water-based drilling fluid composition and preparation method and use thereof

An oil-based drilling fluid composition, includes a base fluid and a treating agent. The base fluid comprises a base oil and an inhibitor; the treating agent comprises an organic soil, a main emulsifier, an auxiliary emulsifier, a plugging agent, a weighting agent, a humectant, an alkaline regulator and a filtrate reducer. 5-25 parts by weight of the inhibitor, 5-12 parts by weight of the organic soil, 1-6 parts by weight of the main emulsifier, 2-8 parts by weight of the auxiliary emulsifier, 3-18 parts by weight of the plugging agent, 5-30 parts by weight of the weighting agent, 2-6 parts by weight of the humectant, 2-7 parts by weight of the alkaline regulator and 2-10 parts by weight of the filtrate reducer are used, based on 100 parts by weight of base oil.

Oil-based drilling fluid composition, oil-based drilling fluid and preparation method and use thereof

The present disclosure a pressure-bearing plugging agent, comprises a core, a first coating layer and a second coating layer which are sequentially coated on an outer surface of the core, wherein the core is made of a water-absorbing swellable material, the first coating layer is a paraffin layer, and the second coating layer is obtained by cementing the rigid particles with an adhesive.

Pressure-bearing plugging agent and preparation method and use thereof

The present discloses a pressure-bearing plugging composition comprising 1-7 parts by weight bentonite, 0.1-1.5 parts by weight deformation material, 8-18 parts by weight filling material and 4-12 parts by weight modified bridging material, based on 100 parts by weight of water; the modified bridging material comprises a core, and a coating layer coated on an outer surface of the core, and a paraffin layer disposed between the core and the coating layer; the core is made of a water-absorbing material, and the coating layer is formed by bonding rigid particles and an adhesive.

Pressure-bearing plugging composition, pressure-bearing plugging slurry and preparation method and use thereof

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Chengdu, China

Wen Xu