Tianjin University

China National Offshore Oil Corporation

China Oilfield Services, Limited

Haitao Liu

Tian Huang

Jiangping Mei

Qi Liu

Yimin Song

Shaohua Wang

Panfeng Wang

Limin Zhang

Chenglin Dong

Zenghua Ma

Huajun Liu

Xuda Qin

Tong Wang

Yongtao Sun

Tao Lin

Yubao Sun

Manxin Wang

Xueman Zhao

The present disclosure discloses a five-degree-of-freedom hybrid robot with rotational supports. A first and a second fixed shaft seats are rotatably connected to a first and a second rotational support through a hinge, respectively. One end of a first length adjustment device runs through the first rotational support, and the other end is fixedly connected to a moving platform. One end of each of the second and third length adjustment devices runs through the first rotational support and is then connected to the moving platform, respectively. Middle portions of the first, second and third length adjustment devices are each hinged onto the first rotational support. One end of a fourth length adjustment device runs through the second rotational support and is connected to the moving platform. Middle portion of the fourth length adjustment device is hinged onto the second rotational support.

Five-degree-of-freedom hybrid robot with rotational supports

The present application relates to a high temperature carbon dioxide corrosion inhibitor comprising the following components by mass percent: amide compound 15&#x2dc;50%, organic alkynol 10&#x2dc;25%, mercaptan acid 5&#x2dc;15%, piperidine 5&#x2dc;25%, mercaptopyridine 5&#x2dc;15%, and solvent 25&#x2dc;60%. The corrosion inhibitor has excellent corrosion inhibition for COcorrosion of oil field water system at a high temperature (150&#x2dc;250&#xb0; C.).

High temperature carbon dioxide corrosion inhibitor

A parallel mechanism with three-dimensional translation and one-dimensional rotation include a fixing rack, a mobile platform and four chains of the same structure which are symmetrically set between the fixing rack and the mobile platform. Each chain has a near rack rod and two parallel far rack rods. The mobile platform includes a main platform and an assistant platform connected by a revolute joint and perpendicular to each other. Each end of the main platform and the assistant platform is connected with a corresponding lower connecting shaft separately.

Parallel mechanism having three-dimensional translations and one-dimensional rotation

A parallel mechanism which has a holding bracket; a movable platform; and three branch joint assemblies of the same structure that are spatially arranged symmetrically about an axis disposed between the holding bracket and the movable platform. Each branch joint assembly has a connecting rod, a linear guide, a driving device and a carriage. The linear guide and the driving device both are secured on the connecting rod. One end of the connecting rod is connected with the movable platform through a hinge having three rotational degrees of freedom. The carriage and the linear guide are connected with each other by a sliding joint, and the carriage is connected with the holding bracket by a hinge having one rotational degree of freedom.

Parallel mechanism having two rotational and one translational degrees of freedom

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Tianjin, China

Haitao Liu