Cnpc USA Corporation

Beijing Huamei Inc.

Chinese Academy of Sciences

China National Petroleum Corporation

General Research Institute for Nonferrous Metals

Beijing Huamel, Inc.

Yonghong Wang

Yu Liu

Jiaxiang Ren

Peng Cheng

Xiaomin C Cheng

Xiongwen Yang

Liang Zhao

Peixiang Xing

Demin Chen

Jing Wang

Qiang Li

Jiaqing Yu

Ping Song

Chris X Cheng

Qian Qian

Jianhua Guo

Javier Davila

Guifu Liu

Jiayang Li

Yongqing Jiao

Dawei Xue

Guojun Dong

Jiayu Qian

Xihui Hu

Hailing Tu

Fengyi Zhang

Co-cured blends of fluoroelastomers of tetrafluoroethylene-propylene copolymer with cure site monomer and terpolymers of Vinylidene fluoride (VDF), Hexafluoropropylene (HFP) and Tetrafluoroethylene (TFE) with peroxide as initiator and coagent TAIC as crosslinker show improved curing performance, improved mechanical properties and improved compression set as well. The co-cured fluoroelastomers show improved chemical resistance to the solvent aging systems and better retention of mechanical properties after aging at high temperature in the solvents system.

Co-cured fluoroelastomers with improved chemical resistance

A cutting element comprises a cylindrical substrate, a table bonded to the substrate, a working surface on the top of the table, and a plurality of dimples on the working surface. The table is made of super-abrasive material. The super-abrasive material can be PCD. Surface patterns of the table can reduce contact friction between the rock and the cutting element. Therefore, heat on the table can be reduced and thermal damage to the table is decreased. This results in improved cutting element service life.

Cutting element with reduced friction

The present invention provides non-planar cutting tooth and a diamond drill bit. The non-planar cutting tooth and the diamond drill bit have great ability of impact resistance and balling resistance. According to the features of drilled formation, cutting teeth are arranged on the drill bit with different mode, which can improve the mechanical speed and footage of the drill bit.

Convex ridge type non-planar cutting tooth and diamond drill bit

The present invention provides a convex ridge type non-planar cutting tooth and a diamond drill bit, the convex ridge type non-planar cutting tooth comprises a cylindrical body, the surface of the end portion of the cylindrical body is provided with a main cutting convex ridge and two non-cutting convex ridges, the inner end of the main cutting convex ridge and the inner ends of the two non-cutting convex ridges converge at the surface of the end portion of the cylindrical body, the outer end of the main cutting convex ridge and the outer ends of the two non-cutting convex ridges extend to the outer edge of the surface of the end portion of the cylindrical body, the surfaces of the end portion of the cylindrical body on both sides of the main cutting convex ridge are cutting bevels. The convex ridge type non-planar cutting tooth and the diamond drill bit have great ability of impact resistance and balling resistance. According to the features of drilled formation, convex ridge type non-planar cutting teeth are arranged on the drill bit with different mode, which can improve the mechanical speed and footage of the drill bit.

The present invention discloses a protein IPA1 related to plant architecture, its coding genes and uses, wherein the protein is 1) or 2) as follows: 1) the protein consisting of the amino acid sequence showed by sequence 1 in the sequence list; 2) the protein derived from the protein of 1) by substitution and/or deletion and/or addition of one or several amino acid residues in the amino acid sequence defined in 1) and relating to plant architecture. IPA1 gene can be used for molecular marker-assisted breeding, cultivating new rice varieties and improving rice yield.

Protein IPA1 related to plant architecture, its coding genes and uses

The present invention relates to semiconductor crystal growth equipments. A vapor controlled czochralski (VCZ) single crystal growth apparatus comprises a single crystal furnace, a heating unit, a mechanical transmission unit, and a gaseous adjustment unit. A hot-wall sealed container is mounted in the single crystal furnace, and a crucible is mounted within the hot-wall sealed container. The hot-wall sealed container includes an upper container part and a lower container part. A sealing connection device is provided between the upper and lower container parts. A crucible-transmitting shaft and a seed shaft are inserted into the hot-wall sealed container through respective sealing devices.

Vapor controlled czochralski (VCZ) single crystal growth apparatus

Growing community of inventors

Beijing, China

Yonghong Wang