Other

Petrochina Company Limited

Yongjun Lu

Yang Li

Jinzong Yang

Baoshan Guan

Mingchu Gu

Yurong Wang

Dingyi Hong

Hongde Xu

Zhanxia Lv

Yuchun Song

Xiaohui Qiu

Xingjun Lu

Li Ping Yang

Jian Ding

Wen Zhai

Haiyan Wang

Jiang Yang

Weixiang Cui

Hua Ming

Ping Liu

A performance testing device for acid fracturing fluid includes: two semiterete rock core holders, the flat face sides of the two semiterete rock core holders being arranged opposite to each other; the two semicircle sides of the two semiterete rock core holders being provided with a rotation member which is opened with a first groove; the two semiterete rock core holders being able to rotate about a first rotation axis formed corporately by the two rotation members; a pressure applying shell having a recessed portion that matches with the curved face side, the recessed portion being able to cooperate with the curved face side, the pressure applying shell being able to apply a pressure to the two rock core holders to bring the two flat face sides thereof together.

Performance testing device for acid fracturing fluid and application thereof

The present invention relates to viscoelastic fracturing fluids comprising one or more zwitterionic surfactants having multiple hydrophobic and hydrophilic groups. The viscoelastic fracturing fluids can be used to stimulate reservoir and increase oil and gas production.

Viscoelastic surfactant having multiple hydrophobic and hydrophilic groups as fracturing fluids

The present invention relates to multiblock interpolymers having the following symmetric structures and processes for their preparation: Y-X-Y, wherein Y represents a block of a random copolymer of conjugated diene and monovinyl aromatic monomer; and X represents a block of butadiene homopolymer, a block of isoprene homopolymer, or a block of butadiene/isoprene copolymer, and processes for the preparation thereof. The present multiblock interpolymers have in the same molecule both a rubber block of random copolymer of conjugated diene and monovinyl aromatic monomer and a rubber block selected from blocks of butadiene homopolymer, isoprene homopolymer and butadiene/isoprene copolymers, and hence possess excellent properties of the both two kinds of rubbers, and can be used widely as integrated rubber materials with excellent property balance, the present processes can simply prepare the above integrated rubber material in situ in a single reactor.

Multiblock interpolymers and processes for the preparation thereof

Butadiene/isoprene/monovinyl aromatic monomer heptablock copolymers and method for the preparation thereof

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Beijing, China

Yongjun Lu