China University of Petroleum

The Procter Gamble Company

Yiqun Zhang

Zhongwei Huang

Gensheng Li

Huaizhong Shi

Mao Sheng

Xianzhi Song

Ross Strand

Yu Shi

Xiaoli Wang

Ya Qiong Liu

Xiaoxiao Li

Steven Hamilton Hoke

Yujun Li

Haizhu Wang

Lu Ji

Jingbin Li

Shouceng Tian

Hanbo Bao

A plugging and wall reinforcing device and a method of using thereof. The nesting plugging and wall reinforcing device comprises an external slotted metal pipe and an internal nested blasting tool, wherein the slotted metal pipe has spiral slits or straight slits cut on a pipe wall thereof; the nested blasting tool is a mandrel having a surface provided with a plurality of explosive grooves in which explosives are placed; the slotted metal pipe is disposed around the mandrel, with a movable fit therebetween. The present invention can effectively improve the plugging success rate.

Energy-gathered bundle type nesting plugging and wall reinforcing device and application thereof in karst cave plugging

The present disclosure provides a hydrothermal geothermal development method of multilateral well closed circulation, comprises the steps of: dividing a geothermal reservoir into single layers according to geothermal reservoir geological conditions, wherein an upper single layer with a lower water temperature and a higher permeability is taken as a recharge layer, and a lower single layer with a higher water temperature is taken as a production layer; tripping a production casing, and injecting cement for well cementation; performing casing lateral windowing in a vertical hole corresponding to the recharge layer, and drilling several branch radial horizontal holes into the recharge layer; performing casing lateral windowing in the vertical hole corresponding to the production layer, and drilling several branch radial horizontal holes into the production layer; tripping a guiding pipe into the production casing of the vertical hole, with a depth thereof reaching a well section between the recharge layer and the production layer; tripping a packer at a guiding shoe to isolate the guiding pipe and an annulus of the casing from each other, so as to prevent geothermal fluid of the recharge layer and the production layer from being communicated with each other in the vertical hole.

Hydrothermal geothermal development method of multilateral well closed circulation

An oral care composition comprising a stannous ion source and/or a zinc ion source; a phytic acid or a phytic acid salt or mixtures thereof; characterized in that the phytic acid or phytic acid salt has an average IPn of greater than 5.2. In a composition which comprises stannous, there is a decrease in soluble stannous whilst maintaining an equivalent efficacy to a composition comprising a higher level of soluble stannous and efficacy is observed for avoiding stain and astringency problems. When zinc ions are present, it has been surprisingly found that a decrease in soluble zinc can provide an equivalent antimicrobial efficacy to a composition comprising a greater level of soluble zinc.

Oral care compositions comprising phytic acid

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Beijing, China

Yiqun Zhang