Core Barrels nwere Round-Shank Bits

Core barrels nwere round-shank bits na-anọchite anya usoro drilling pụrụ iche n'ime nnukwu spectrum nke ngwaọrụ rock-socketing eji na nrụpụta ntọala miri emi. Ụdị a na-ejide ngwugwu barrels nwere njikọ round-shank bits, nke a na-eme ka ha nwee ike weghachite samples rock core zuru ezu ma na-aga n'ihu na boreholes site na rock formations nwere ikike nke a hụrụ n'okpuru ala. Round-shank bits—nke a na-akọwapụta site na njikọ cylindrical shaft kama njikọ threaded ma ọ bụ wedged—na-enye usoro njikọ dị mfe nke dabara adaba maka ngwa miri emi na formations ebe àgwà weghachite core na arụmọrụ drilling ga-ejikwa na arụmọrụ. Usoro ngwa bụ isi maka usoro ndị a gụnyere ntọala rock-socketed maka mgbidi diaphragm, mkpuchi, usoro piles secant na tangent, na ntinye auger na-agba n'ihu na bedrock. Na nrụpụta mkpuchi, core barrels na-enye ndị na-arụ ọrụ ohere ịlele ikike rock, nyochaa profaịlụ weathering, na kwado ịdị elu socketing kwesịrị ekwesị mgbe ha na-aga n'ihu na borehole maka itinye casing ma ọ bụ ọrụ grouting. Maka nchịkọta mgbidi diaphragm, usoro ndị a na-eme ka drilling na-adị mfe site na layers rock etiti na nkwado nke bearing strata tupu nrụpụta pile cap. Nhazi round-shank na-eme ka ọ bụrụ ihe dị irè na ọnọdụ mixed-face ebe ala na horizons rock na-adịghị ike na-achọ mgbanwe bits na ngwa ngwa. Na-arụ ọrụ, ngwugwu core barrels na-arụ ọrụ site na rotary percussion drilling ma ọ bụ usoro rotary, dabere na àgwà rock formation. The barrel—a hollow steel tube—na-aga n'ihu na rock n'okpuru ịtụgharị na ibu axial ebe ihe na-egbutu na ihu bit na-ewepụ ma na-emebi ihe rock. Ihe core na-abanye n'ime barrel; ka drilling na-aga n'ihu, core na-anọ n'ime barrel ma na-eweghachite ya site na iwepụ barrel. Usoro weghachite a na-enye nzaghachi geologic kpọmkwem dị mkpa maka mkpebi imewe ntọala. Njikọ round-shank na-enye ohere maka itinye na iwepụ bits n'enweghị ngwaọrụ pụrụ iche, na-eme ka mgbanwe bits na-adị ngwa ngwa na usoro rock dị iche iche. Nhazi ngwaọrụ n'ime ụdị a na-agbanwe agbanwe dabere na ike rock, ịdị elu drilling, na ihe a chọrọ. Ụdị ọkọlọtọ na-adịkarị site na 75 ruo 150 millimeters maka ngwa ntọala a na-ahụkarị, na ogologo barrels na-adịkarị n'etiti 1.0 na 1.5 meters. A na-enweta nhazi tubes otu na tubes abụọ; usoro tubes abụọ na-ejikọta barrel na-agba n'ime nke na-ebelata ọnwụ core na formations fractured ma ọ bụ na-adịghị ike. Ụdị bits gụnyere impregnated diamond, tungsten carbide insert, na surface-set diamond variants, a họpụtara dabere na lithologies a tụrụ anya site na sedimentary rock dị nro ruo granite na metamorphic formations. Usoro ịhọrọ gụnyere ike rock a tụrụ anya (nke a na-atụle site na uniaxial compressive strength), ọkwa weathering, ọkwa nke ịkekọrịta, pasent weghachite core a chọrọ, ịdị elu drilling, na oge ọrụ. Ndị na-arụ ọrụ na-enyocha usoro round-shank megide nhọrọ njikọ threaded dabere na mkpa ọsọ drilling, atụmanya ndụ bits na ụdị rock pụrụ iche, na logistics maka ịzụta bits. Nhọrọ diameter core na-ejikọta mkpa àgwà samples maka nyocha geotechnical na oge drilling na ikike ibu ngwaọrụ. Ụkpụrụ ụlọ ọrụ na-achịkwa usoro ndị a gụnyere ISO 2113 (Diamond drilling for geological exploration—Procedure and equipment) na ASTM D2113 (Diamond core drilling for site investigation), nke na-akọwapụta ụdị diameter core, metrics weghachite, na usoro àgwà. Omume Europe na-ezo aka na EN 12716 (Nrụpụta ọrụ geotechnical pụrụ iche—Jet grouting na ịkekọrịta ala) ebe ọ dị mkpa maka usoro nrụpụta mgbidi.