China Oilfield Services, Limited

China National Offshore Oil Corporation

Jibin Zou

Yongren Feng

Xingfang Wu

Jian Li

Qiang Yu

Tiemin Liu

Xiaodong Chu

Zhibin Tian

Lin Huang

Xiaofei Qin

Zhongtian Hao

Zhongli Bao

Guoqiang Zhang

Guangshuai Li

Yiming Wu

Yuqing Yang

A connecting structure for a drill collar of a logging while drilling instrument and drill collar sub male and female joints are provided. The connecting structure for a drill collar of a logging while drilling instrument includes a male connecting joint and a female connecting joint matched with each other. The male connecting joint and the female connecting joint are rotatable relative to each other. Electrical passages are respectively arranged in the male and female connecting joints. One of the male and female connecting joints is provided with a multi-core coaxial electrical male connector connected with the electrical passage, and the other is correspondingly provided with a multi-core coaxial electrical female connector connected with the electrical passage. The male connecting joint is coaxially nested in the female connecting joint. The multi-core coaxial electrical male connector is inserted into and fitted to the multi-core coaxial electrical female connector.

Connecting structure for drill collar of logging while drilling instrument and drill collar sub male and female joints

A horizontal-to-vertical drilling module for a deep well includes a fixed plate () provided with a first guide hole having a turning section (), a core breaking section () and a moving section (); a movable plate () movably mounted on one side of the fixed plate and provided with a second guide hole having a turning driving section (), a core breaking driving section () and a moving driving section (), the projection of the first guide hole on the movable plate intersecting with the second guide hole; a coring module () positioned at the other side of the fixed plate and provided with a moving column () on the side facing the fixed plate; and a moving slider () having an open groove (), the moving slider being installed in the first guide hole and rotatably connected to the coring module.

Horizontal-to-vertical drilling module for deep well

The present application provides a sidewall coring structure directly driven by an electric motor comprising a drill bit, an electric motor and a speed reducer, the electric motor and the speed reducer are an integrated structure and the drill bit is directly connected to an output of the speed reducer. The coring structure directly drives the drill bit through an integrated structure of the speed reducer and the electric motor; its transmission efficiency is greatly improved, meanwhile the coring structure is more simplified, with improved reliability, easier maintenance and reduced maintenance cost.

Sidewall coring structure directly driven by an electric motor

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Langfang, China

Jibin Zou