STRONG MAGNETIC SALVAGING TOOL AND STRONG MAGNETIC PERFORMANCE TESTING METHOD

WIPO Patent Application WO/2024/016567

A1

The present invention relates to a strong magnetic salvaging tool and a strong magnetic performance testing method. The strong magnetic salvaging tool comprises a mandrel (1); a plurality of ribs (11) are arranged on the outer wall of the mandrel (1) at intervals in the circumferential direction; each rib (11) extends from a first end of the mandrel (1) to a second end of the mandrel (1) in the axial direction of the mandrel (1); the gap between two adjacent ribs (11) forms an impurity storage cavity. Mounting recesses (12) penetrating through two ends of each rib (11) are formed in two side surfaces of each rib (11), and a magnetic strip structure (2) is embedded in each mounting recess (12). Two end blocking caps (3) capable of limiting both ends of each magnetic strip structure (2) are arranged at both ends of the mandrel (1); the two end blocking caps (3) are locked and fixed by means of a locking assembly located in the mandrel (1). In the present invention, magnets are simple and reliable to install and convenient to replace, and there is no risk of falling into a well; according to the present invention, the performance of the magnets in the strong magnetic salvaging tool can also be tested, and the operation is simple.

MA RUTAO (CN)
YANG XIANGTONG (CN)
HE AIGUO (CN)
YUAN GUOHAI (CN)
MU LINGYU (CN)
LIAN ZHILONG (CN)
NING KUN (CN)
GAO XIANG (CN)
ZHANG KUI (CN)
FANG YEXIN (CN)
YE YU (CN)

PCT/CN2022/137836

January 25, 2024

December 09, 2022

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PETROCHINA CO LTD (CN)
CNPC ENG TECH RES & DEV CO LTD (CN)

E21B31/06

CN115370314A	2022-11-22
US20110285155A1	2011-11-24
CN205000929U	2016-01-27
CN209761376U	2019-12-10

BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)

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