Yakapfuura uye yazvino yeCone bit

Kubva pakatanga bhiti rekutanga rekoni muna 1909, bhiti rekoni ndiro rakanyanya kushandiswa pasi rose. Tricone bhiti ndiyo inonyanya kucherwa bhiti inoshandiswa mukuita rotary drilling mashandiro. Rudzi urwu rwekuboorera rune magadzirirwo emazino akasiyana uye anotakura junction marudzi, saka anogona kuchinjirwa kune akasiyana maumbirwo emhando. Mukushanda kwekuchera, chimiro chakakodzera chekoni bhiti chinogona kusarudzwa nenzira kwayo zvichienderana nemamiriro ekugadzirwa kwakacherwa, uye inogutsa yekumhanyisa kumhanya uye bit footage inogona kuwanikwa.

Nheyo yekushanda yekoni bit

Kana koni ichishanda nechepazasi pegomba, bhiti rose rinotenderera nekabhiti axis, inodaidzwa kunzi revolution, uye makoni matatu anokunguruka pazasi pegomba zvichienderana neakiso yawo, inodaidzwa kunzi rotation. Huremu pabhiti rinoiswa padombo nemumazino hunoita kuti dombo ritsemuke (kupwanya). Mukukunguruka, koni inobata pasi pegomba nemazino ega uye mazino maviri, uye nzvimbo yepakati pekoni yakakwira uye yakadzikira, izvo zvinoita kuti bhiti ribudise kureba kwedenda. Kudengenyeka uku kunokonzeresa kuti tambo yekubooresa isimbise uye irambe ichitambanuka, uye tambo yepasi inoshandura iyi cyclic elastic deformation kuita simba rekuita pakuumbwa kuburikidza nemazino kuti aparadze dombo. Uku kuita uye kupwanya chiito ndiyo nzira huru yekupwanya dombo nekoni bit.

Kunze kwekukanganisa nekupwanya dombo pazasi pegomba, iyo cone bit inoburitsawo shear effect padombo pazasi pegomba.

Classification uye kusarudzwa kwekoni bit

Kune vagadziri vakawanda vekoni bits, izvo zvinopa zvakasiyana-siyana zvemhando uye zvimiro zvebhiti. Kuitira kugonesa kusarudzwa nekushandiswa kwemakoni bhiti, International Institute of Drilling Contractors (IADC) yakagadzira yakabatana classification standard uye manhamba nzira yemakoni bits pasi rose.