The thread joint of drill pipe is prone to fracture
failure during longdistance horizontal directional
drilling, which seriously affects its drilling performance. A twodimensional numerical simulation model of thread drill pipe joint of
horizontal directional drilling rig is established to study the stress
characteristics, tensile and compressive properties of drill pipe joint under
the action of screwingup. Then, based on orthogonal
experimental optimization method, the key structural parameters of thread drill
pipe joint are optimized. The optimized parameters of drill pipe joint thread
are: taper 1:16, pitch 6.25 mm, tooth height 3.195 mm, the bearing surface
angle 28°, and the guide surface angle 32°. By comparing the tensile and compressive properties of the
optimized drill pipe joint with those before optimization, it is found that the
tensile property and compressive property of the optimized thread joint are
improved by 9.8% and 15.2%,
respectively.
LIU Zaizheng
.
Bearing Capacity of Drill Pipe Joint Thread of Horizontal
Directional Drilling
Machine and Its Structure Optimization
[J]. Tunnel Construction, 2022
, 42(S2)
: 487
-493
.
DOI: 10.3973/j.issn.2096-4498.2022.S2.061
