US 11,739,603 B2
Core detection device of coring instrument
Zhibin Tian, Hebei (CN); Lin Huang, Hebei (CN); Zanqing Wei, Hebei (CN); Shusheng Guo, Hebei (CN); Yongren Feng, Hebei (CN); Xingfang Wu, Hebei (CN); Tiemin Liu, Hebei (CN); Yong Jiang, Hebei (CN); Bin Gao, Hebei (CN); Peng Sun, Hebei (CN); Shiwei Zong, Hebei (CN); Jianyong Zhang, Hebei (CN); and Aijun Zhang, Hebei (CN)
Assigned to China National Offshore Oil Corporation, Beijing (CN); and China Oilfield Services Limited, Tianjin (CN)
Filed by China National Offshore Oil Corporation, Beijing (CN); and China Oilfield Services Limited, Tianjin (CN)
Filed on Feb. 18, 2021, as Appl. No. 17/178,479.
Claims priority of application No. 202010171021.5 (CN), filed on Mar. 12, 2020.
Prior Publication US 2021/0285849 A1, Sep. 16, 2021
Int. Cl. G01N 1/08 (2006.01); G01B 21/02 (2006.01); E21B 25/00 (2006.01); E21B 17/10 (2006.01)
CPC E21B 25/00 (2013.01) [E21B 17/1021 (2013.01); G01B 21/02 (2013.01); G01N 1/08 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A core detection device of a coring instrument, comprising: a base body and a core switch mechanism provided on the base body, the base body being provided with a core channel in communication with a core barrel,
wherein the core switch mechanism comprises a detection portion, a connecting rod assembly and a travel switch which are sequentially arranged and connected along a length direction of the coring instrument; the detection portion is rotatably installed on the base body and one end thereof is extended into the core channel, so that a core passing through the core channel pushes the detection portion to rotate, and the connecting rod assembly is capable of being pulled by the rotating detection portion to trigger the travel switch to operate;
wherein an elastic member is provided at one end of the connecting rod assembly connected with the travel switch and configured to reset the connecting rod assembly after the core passes through the core channel, so as to trigger the travel switch;
wherein the core switch mechanism further comprises a first housing connected with the base body, the connecting rod assembly comprises a connecting rod and a pull rod, two ends of the connecting rod are respectively hinged with the detection portion and the pull rod, one end of the pull rod away from the connecting rod extends into the first housing, and the travel switch is provided in the first housing at one end away from the pull rod;
wherein the first housing is connected with the base body through a first guide post, and the pull rod is hinged with the connecting rod through a connector provided at one end of the pull rod, and the connector is slidably connected with the first guide post for guiding the pull rod.