China Oilfield Services, Limited

China National Offshore Oil Corporation

Yongzeng Xue

Yongren Feng

Lin Huang

Xiaodong Chu

Tiemin Liu

Tao Lu

Minggao Zhou

Zhibin Tian

Zanqing Wei

Xingfang Wu

Xiaofei Qin

Yanmin Zhou

Shusheng Guo

Yang Shen

Guoqiang Zhang

Yongchao Chen

Kun Xu

Xinhuo Weng

Suogui Shang

Ya Jin

Changgui Xu

A coring and sampling integrated sub, including an integrally formed base body, a probe module, a coring module and a hydraulic module. The probe module, the coring module and the hydraulic module are all mounted on the base body. The hydraulic module, the probe module and the coring module are sequentially arranged from top to bottom. An output end of the hydraulic module is configured to be connected to the probe module and the coring module, respectively. The hydraulic module is configured to provide telescopic power for the probe module, and provide power for movement, flipping, and pushing of the coring module. Also disclosed is a downhole instrument including the coring and sampling integrated sub.

Coring and sampling integrated sub and downhole instrument

An integrated logging instrument for coring and sampling includes a downhole main body and a ground system. The downhole main body is connected with the ground system through a long cable. The downhole main body includes a coring and sampling mechanism, a power mechanism and an energy storage mechanism. The coring and sampling mechanism includes a coring assembly for drilling cores and a pushing and setting assembly for downhole fixation. The power mechanism is arranged at an upper end of the coring and sampling mechanism, and includes a motor, a piston structure and a pump body. The piston structure and the pump body are respectively arranged at two output ends of the motor. The piston structure is arranged to provide suction power. The pump body is arranged to provide hydraulic power. The energy storage mechanism is arranged at a lower end of the coring and sampling mechanism.

Integrated logging instrument for coring and sampling

A sampling-by-pushing system includes a setting-by-pushing mechanism and a centralizing device. The setting-by-pushing mechanism is connected with the centralizing device through a connecting pipe, and is configured to be set and sealed in a borehole. The centralizing device includes a base body and a retractable support arm arranged on the base body. The support arm is configured to be in contact with the wall of the borehole so as to position the setting-by-pushing mechanism in the center of the borehole.

Sampling-by-pushing system and setting method thereof

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Sanhe Langfang, China

Yongzeng Xue