Shandong University

Ocean University of China

Wei Lu

Zhen Liu

Weimin Cheng

Dong Wang

Jinliang Li

Guansheng Qi

Qianting Hu

Zhenmin Bao

Ning Li

Xiaoli Hu

Chuanrui Qin

Shan Wang

Jingjie Hu

Rui Hou

Dongling Sun

Xiaoliang Ren

A ground wellhole dedicated protective pipe, disposed inside a ground wellhole for gas extraction of a mining-induced area, includes a casing, and a chain inside the casing and slidable relative to the casing. The chain includes a chain formed by a plurality of chain drums through serial connection, and a detachable connecting piece connecting between chains. A plurality of air holes is opened in the chain drum along an axial direction of the chain drum.

Ground wellhole dedicated protective pipe for gas extraction of mining-induced area

A dynamically self-balancing pressurized borehole sealing apparatus and method thereof for coal seam gas pressure measurement having a pressure measuring tube arranged in a borehole with one end of the pressure measuring tube provided with a pressure measuring unit. The pressure measuring tube is wrapped with an expansion airbag and provided with a pressure introducing hole communicating with the expansion airbag. On each side of the expansion airbag, the pressure measuring tube is wrapped with a front borehole inflatable sealing airbag and a rear borehole inflatable sealing airbag respectively. A gel injection chamber is reserved between the front borehole sealing airbag and the rear borehole sealing airbag and between the expansion airbag and an inner side of the borehole. Gas from the pressure measuring tube expands the expansion airbag and squeezes sealing gel in the gel injection chamber into borehole fractures for dynamic pressurized sealing.

Dynamically self-balancing pressurized borehole-sealing apparatus and method thereof for coal seam gas pressure measurement

The present invention relates to a method in the field of shellfish breeding techniques, for breeding a scallop population that have improved carotenoid content in the orange-red adductor muscles or other muscle tissues. This method includes the steps of selecting the rare individuals that have orange-red adductor muscles from natural scallop populations, growing the selected scallops, inducing the reproduction, artificially fertilization, and finally breeding a scallop population with orange-red adductor muscles which can be expanded for the cultivation on a large scale. Comparing to other known breeding methods, the present method does not use transgenic technologies to include introduce any exogenous genes, thus does not have any bio-safety and ethics issues. All the mutant scallops with orange-red adductor muscles are selected from natural or cultivated populations. After breeding for four generations, the obtained scallops have abundant carotenoid ingredients in their orange-red adductor muscles. The obtained scallop population is genetically stable and has high survival rate, and it thus can be used for cultivation on a large scale. In summary, this breeding method is simple, low cost and the breeding scallop population has high economic and nutritious values.

Breeding method for orange-adductor-muscle scallop

Growing community of inventors

Qingdao, China

Wei Lu