The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 07, 2025
Filed:
Aug. 13, 2024
Cnpc Usa Corporation, Houston, TX (US);
Beijing Huamei, Inc., Beijing, CN;
China National Petroleum Corporation, Beijing, CN;
Jinjun Wang, Houston, TX (US);
Chris Cheng, Houston, TX (US);
Jiaqing Yu, Houston, TX (US);
Hems Mada, Houston, TX (US);
Kevin Waddell, Houston, TX (US);
Xiongwen Yang, Beijing, CN;
Xu Zhao, Beijing, CN;
Ming Yi, Beijing, CN;
Xin Zhang, Beijing, CN;
Yanping Zhang, Beijing, CN;
Yong Luo, Beijing, CN;
Fuxiang Hou, Beijing, CN;
Tito Zabala, Houston, TX (US);
CNPC USA Corporation, Houston, TX (US);
Beijing Huamei, Inc., Beijing, CN;
China National Petroleum Corporation, Beijing, CN;
Abstract
The present invention is a hydraulic control apparatus that activates and deactivates a downhole tool, such as a reamer, at a desired downhole location in a borehole. The apparatus includes a piston, a housing, a coil spring, and a guide pin. The piston has a cam portion with a continuous slotted groove. There is a slide member and a force member within the slotted groove so that the piston moves longitudinally and rotationally within the housing according to the guide pin within the slotted groove. At the desired downhole location, drilling fluid pressure passes a pressure threshold to move a front outlet of the piston to an opened position past an end of the housing, while rotating the piston according to the slide member and force member in the slotted groove. The apparatus alternately extends and retracts the reamer by opening and closing the front outlet by hydraulic control.