US 12,339,250 B2
Magnetic flux leakage and electromagnetic acoustic transducer joint testing device and method for drill pipe at wellhead
Jianbo Wu, Chengdu (CN); Rui Ke, Chengdu (CN); and Chengjun Deng, Chengdu (CN)
Assigned to Sichuan University, Chengdu (CN)
Filed by Sichuan University, Chengdu (CN)
Filed on Jan. 22, 2025, as Appl. No. 19/034,261.
Claims priority of application No. 202411268616.7 (CN), filed on Sep. 11, 2024.
Prior Publication US 2025/0164444 A1, May 22, 2025
Int. Cl. G01N 27/83 (2006.01); E21B 47/01 (2012.01); G01N 29/22 (2006.01); G01N 29/27 (2006.01); G01N 29/44 (2006.01)
CPC G01N 27/83 (2013.01) [E21B 47/01 (2013.01); G01N 29/223 (2013.01); G01N 29/27 (2013.01); G01N 29/44 (2013.01); G01N 2291/02854 (2013.01); G01N 2291/2634 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A magnetic flux leakage and electromagnetic acoustic transducer joint testing device for a drill pipe at a wellhead, comprising:
a mounting table;
a limiting frame;
a detection mechanism; and
a signal processing mechanism;
wherein the limiting frame is mounted on the mounting table, and is provided with the detection mechanism; a middle of the detection mechanism is configured for arrangement of the drill pipe; and the detection mechanism is connected to the signal processing mechanism;
the detection mechanism comprises four detection units; the four detection units are configured to form a ring structure; and the drill pipe is located at a middle of the ring structure;
each of the four detection units comprises a probe mounting housing; an inner side of the probe mounting housing is configured to abut against the drill pipe; and an outer side of the probe mounting housing is connected to a probe mounting cover;
the probe mounting housing is provided with a first mounting groove with a spiral structure; a side of the first mounting groove near the drill pipe is provided with an electromagnetic ultrasonic detection probe; a side of the first mounting groove near the probe mounting cover is provided with an inclined permanent magnet; two sides of the first mounting groove along a circumferential direction are each provided with a second mounting groove with a spiral structure; and a magnetic flux leakage detection probe is mounted in the second mounting groove; and
two magnetic flux leakage detection probes close to each other respectively from two adjacent detection units among the four detection units are coincident in spiral trajectory.