Ngwá ọrụ rotators casing

Casing rotators bụ ngwaọrụ hydraulic ma ọ bụ mechanical nke na-enye ịnyịnya rotational na casing strings n'oge ọrụ drilling na ọrụ ntọala omimi. Na nkọwa nke owuwu mgbidi secant, ngwaọrụ ndị a bụ akụkụ dị mkpa nke usoro drilling nke na-enye ohere ka a na-emegharị na ịga n'ihu kwụ ọtọ nke tubes casing nke oge ma ọ bụ nke permanent, nke bụ ihe dị mkpa maka idobe nkwụsi ike nke borehole na iru geometrị pile ziri ezi na ọnọdụ geotechnical siri ike. A na-ejikarị casing rotators na mmezu mgbidi secant, ebe a na-etinye mgbidi kọntaktị na-eme ka mgbidi owuwu na-arụ ọrụ, nkwado excavation basement, na mgbochi cutoff omimi. A na-ejikwa ha na owuwu mgbidi diaphragm, karịsịa mgbe eji usoro drilling dabere na casing kama usoro mgbidi ndu ọdịnala. A na-ejikwa ha na ọrụ jet grouting nke etinyere na usoro casing, mmepụta soil-cement mixing column, na na ụfọdụ ngwa mgbidi sheet pile ebe usoro drilling rotational na-eme ka arụmọrụ driving na njikwa verticality ka mma na strata na-adịghị mma. Usoro ọrụ nke casing rotator na-agụnye ịgbanwe ike hydraulic ma ọ bụ mechanical na torque rotational na-aga n'ihu nke a na-etinye na casing string site na usoro drive head nke etinyere na elu. Rotator, nke a na-ejikarị na kelly ma ọ bụ mast nke igwe drilling, na-ejikọta na casing site na drive head nke na-ejide pipe. Ka casing na-emegharị, friction n'etiti mpụta casing na ala, tinyere omume ịkpụ nke casing shoe (nke bụ njedebe ma ọ bụ ihe na-adịgide adịgide na mbido casing), na-emebi ma wepụ ihe ala, na-enye ohere ka a na-aga n'ihu n'okpuru nrụgide feed nke igwe. Iji mee ka a na-emegharị na ịga n'ihu na-eme ka a ghara ịda borehole, na-edobe verticality, na-ebelata ihe egwu deviation casing na ọnọdụ geotechnical na-adịghị mma. Casing rotators dị na nhazi ndị a na-achọpụta site na usoro architecture drilling na ihe chọrọ diameter casing. Hydraulic rotators, nke bụ ụdị kachasị, na-ejikọta planetary gearboxes ma ọ bụ usoro direct-drive na-enye torque site na 10 ruo 150+ kilonewton-meters (kN·m), nke na-ejikọta na diameters casing na-agbanwe site na 300 mm ruo 1500 mm. Usoro manual ma ọ bụ semi-automatic na-ejikarị maka ngwa diameters dị obere. Interfaces drive head na-anabata ụkpụrụ API casing na usoro quick-coupling proprietary. Nhọrọ nke ngwaọrụ casing rotator kwesịrị ịtụle ọtụtụ ihe. Diameter casing na torque drilling a na-atụ anya, nke a kpebiri site na ngwakọta ala, depth, na nhazi casing shoe, bụ ihe ndị bụ isi. Ike dị na igwe—nke bụ ọsọ hydraulic (liters kwa nkeji) na ikike nrụgide—ga-adaba na nkọwa rotator. Ihe ndị chọrọ ọrụ gụnyere elu isi kwere omume, ọsọ rotation (na-emekarị 5 ruo 30 RPM), na njikọ na usoro ndu igwe dị ugbu a na-emetụta nhọrọ ngwaọrụ nke ukwuu. Iji bụrụ na ha na-adịgide adịgide na ọnọdụ ala na-emerụ ma ọ bụ na-emerụ, na ịdị mma nke bearing, na ịdị mma nke mkpuchi bụ ihe dị mkpa maka arụmọrụ drilling na-adịgide adịgide. Ụkpụrụ ndị a na-emetụta ọrụ casing rotator gụnyere ISO 20475 (ihe achọrọ nchekwa maka ngwaọrụ drilling), ụkpụrụ DIN kwesịrị ekwesị maka igwe hydraulic, na nkọwa pụrụ iche nke ọrụ nke a kpụpụtara site na ndị nrụpụta usoro casing na nhazi igwe. Ikwesiri ime ka a na-echebe nchekwa onye ọrụ na arụmọrụ drilling na-adịgide adịgide na ọnọdụ geotechnical dị iche iche.