20.500.12556/RUL-96351 Jedrovanje z uporabo visokofrekvenčne rotacijske metode sonic Use of coring with high frequency rotary sonic method Strukturno vrtanje se uporablja v namen pridobivanja jeder litoloških plasti. Težnja jedrovanja je pridobitev kvalitetnega vzorca. Ena izmed metod pridobivanja jeder je visokofrekvenčna rotacijska ali sonic metoda jedrovanja, ki se je izkazala kot visoko učinkovita in vsestranska, s katero pridobimo kontinuirane in intaktne vzorce zemljinskih in hribinskih formacij. Slednje pridobimo z vrtalno hidravlično glavo omenjene metode, v kateri se nahajata dva nasprotno usmerjena in uravnotežena ekscentra, ki proizvajata visoke frekvence. Te se v obliki prilagodljivih visokofrekvenčnih valov, skupaj z rotacijo vrtalnega orodja, prenesejo skozi vrtalno drogovje in jedrnik na vrtalno krono za napredovanje v globino in s tem pridobitev jedra. Material v stiku z vrtalno krono pulzira; če je material hribina, ga kruši, če je material zemljina, ga iztiska. Zaradi uporabe visokofrekvenčnih valov sta vrtalna garnitura in orodje materialom primerno prilagojena. Vrtalno orodje je narejeno iz visokokakovostnega jekla s posebno temperaturno obdelavo. Glede na jedrovanje različnih litoloških plasti ločimo več vrst jedrnikov: visokotlačni jedrnik, enostenski jedrnik, dvostenski jedrnik in jedrovanje po sistemu sonic wireline, ki je v razvojni fazi. Sonic metoda jedrovanja je dokazala, da z njo pridobimo jedra s povprečno dvakrat do trikrat hitrejšim napredovanjem v primerjavi s konvencionalnimi rotacijskimi metodami pridobivanja jeder. Metoda je idealna za strukturno vrtanje na okoljevarstvenih območjih, saj nam kot izplačni medij zadostuje le voda. Structural drilling is used to obtain cores of lithological strata. The main goal of coring is to obtain a quality sample. One of the methods of coring is the high frequency rotary or the sonic coring method, which proved to be highly efficient and versatile in obtaining continuous and intact samples of rock formations and soil formations. These are obtained with the method’s hydraulic powered drill head fitted with two counter-oriented and balanced eccenters that produce high frequencies. These frequencies are transferred through the drill rods and core barrel to the drill bit in the form of adaptive high frequency waves as well as with the rotation of the drilling tools. When the material is in contact with the drill bit, it pulses; if the material is rock strata, it breaks up and if the material is soil strata, it is pushed out. Because of the use of high frequency waves, the drill rig and tools are appropriately adjusted. The drill tools are made out of high quality steel with special temperature treatment. Depending on the coring of various lithological layers, we distinguish several types of different core barrels: the Aqualock piston sampler, the single wall core barrel sampler, the dual wall core barrel sampler and the sonic wireline system, which is still in the development phase. The sonic coring method has proved to be able to obtain cores with faster progression, averaging from two to three times faster in comparison to conventional rotary coring methods. Because the method only uses water as mud, it is ideal for structural drilling purposes in environment protected areas. jedrovanje visokofrekvenčna rotacijska metoda sonic metoda visokofrekvenčni valovi jedrnik coring high frequency rotary method sonic method high frequency waves corre barrel true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2017-09-29 07:15:25 2017-09-29 07:15:28 2022-08-12 11:16:28 0000-00-00 00:00:00 2017 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 58286 521.pdf 521.pdf 1 78E3707BBBCC07F8B6CD686135A3E75C 28e9e9ead7b2f72e7d8a1a6e91cf6cad99050f799895d31bdaf0ef165ac8e560 e41f71f6-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/453522a0-634d-4224-8fb8-5b003fa115f4 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=105011 Naravoslovnotehniška fakulteta 0 0 0