A na-akụ ọkpọkọ spiral seam submerged arc welded steel pipe na ntụgharị wee malite ịbanye n'ụdị dị nro.N'okpuru ọrụ nke tri-cone, akukuku na-ebu ụzọ mepụta nrụrụ ngbanwe nke stratum wee wepụ ya n'okpuru nrụgide nke tri-cone.Na gburugburu ebe a na-emepụta ihe, ala dị nro bụ ụrọ na-ejikọta ọnụ, n'agbanyeghị stratum na mgbawa na ala.A na-eme mkpọpu ntụzịaka kwụ n'ahịrị n'usoro n'ike, na nhazi ya na kọntaktị na-agbanwe agbanwe na obere cone rola.Esemokwu na-eme mgbe cone na-ejikọta na ala.Ike mmetụta ahụ na-eme ka ọkpọkọ nchara n'ime mmiri gbadoro agbagọ na-ama jijiji.Mgbe tri-cone bit na-esi na nhazi dị nro gaa na nhazi siri ike, ọ ga-eme ka ọ pụta ìhè n'akụkụ nnukwu mkpọtụ na elu na ala nke ịma jijiji.

Mgbe ọsọ nke mkpọpu bụ 0.008m/s na bit ntụgharị ọsọ bụ 2 radians/s, pseudo-strain ume curve n'oge na-aga n'ihu usoro nke roller cone bit tumadi gụnyere viscosity na elasticity.Otú ọ dị, ebe ọ bụ na okwu viscous na-emekarị, mgbanwe nke ọtụtụ ike n'ime ike nhụsianya bụ ihe a na-apụghị ịgbanwe agbanwe.Ike nrụrụ nke spiral seam submerged arc welded steel pipe bụ isi ike a na-eri iji chịkwaa nrụrụ nke ugogbe anya elekere.Ọ bụrụ na ike pseudo dị elu nke ukwuu, ọ pụtara na ike ike na-achịkwa nrụrụ nke hourglass dị ukwuu, na ntupu kwesịrị nụchaa ma ọ bụ gbanwee ya.Iji belata oke ike nje pseudo.Mgbanwe mberede nke pseudo strain energy na ihe nlereanya a na-emekarị mgbe ntakịrị ihe na-abanye n'ime ala dị nro na cone bit gafere site na interface nke mgbanwe mgbanwe mberede.Ka ike siri ike nke nhazi ahụ dịkwuo ukwuu, ka ike nke pseudo na-esiwanye ike nke ntanye ahụ n'ime nhazi ahụ.Mee ka usoro mkpọpu ihe nke ọkpọkọ welded gburugburu n'usoro na mberede wee buo amụma mgbanwe nke trajectory nke mkpọpu ihe.