Okwedlule nokwamanje kwe-Cone bit

Kusukela kwavela i-cone bit yokuqala ngo-1909, i-cone bit ibilokhu isetshenziswa kakhulu emhlabeni. I-Tricone bit iwumshini wokubhola osetshenziswa kakhulu emisebenzini yokumba ejikelezayo. Lolu hlobo lokuprakthiza lunemiklamo ehlukene yamazinyo kanye nezinhlobo zokuhlanganisa ezithwalayo, ngakho-ke lungashintshwa ukuze lube nezinhlobo ezihlukahlukene zokwakheka. Emsebenzini wokumba, ukwakheka okufanele kwe-cone bit kungakhethwa ngokufanelekile ngokuya ngezakhiwo zokubunjwa okubhoboziwe, futhi isivinini sokubhola esigculisayo kanye ne-bit footage ingatholakala.

Umgomo wokusebenza we-cone bit

Lapho i-cone bit isebenza ngaphansi kwembobo, yonke ibhithi izungeza i-bit axis, ebizwa ngokuthi i-revolution, futhi ama-cones amathathu agingqika phansi embobeni ngokwe-eksisi yawo siqu, ebizwa ngokuthi ukuzungezisa. Isisindo esifakwe edwaleni emazinyweni sibangela ukuba idwala liqhekeke (liqhekeke). Enqubweni yokugoqa, i-cone ithintana ngokuhlukile phansi kwembobo ngamazinyo angashadile namazinyo aphindwe kabili, futhi indawo yesikhungo se-cone iphakeme futhi iphansi, okubangela ukuthi i-bit ikhiqize ukudlidliza kwe-longitudinal. Lokhu kudlidliza kwe-longitudinal kubangela ukuthi intambo yokubhoboza icindezele futhi yeluleke ngokuqhubekayo, futhi intambo yokubhoboza ephansi iguqula lokhu kuguga okunwebeka okujikelezayo kube amandla omthelela ekwakhekeni ngamazinyo ukuze kuphuke idwala. Lo mthelela kanye nesenzo sokuchotshozwa kuyindlela eyinhloko yokuchotshozwa kwamadwala nge-cone bit.

Ngaphandle kokuthinta nokuchoboza idwala ngaphansi kwembobo, i-cone bit iphinde ikhiqize umphumela wokugunda edwaleni elingaphansi kwembobo.

Ukuhlukaniswa nokukhethwa kwe-cone bit

Kukhona abakhiqizi abaningi be-cone bits, abahlinzeka ngezinhlobo ezihlukahlukene kanye nezakhiwo zamabhithi. Ukuze kube lula ukukhetha nokusebenzisa izingcezu zekhoni, i-International Institute of Drilling Contractors (IADC) ithuthukise izinga elihlanganisiwe lokuhlukanisa kanye nendlela yezinombolo zamabhithi ekhoni emhlabeni jikelele.