Step Drag bit ke boro eo hangata e etselitsoeng ho sebelisoa ka mokhoa o bonolo joalo ka lehlabathe, letsopa kapa lejoe le bonolo.Leha ho le joalo, li ke ke tsa sebetsa hantle lehlohlojaneng le mahoashe kapa mafika a thata.Litšebeliso li kenyelletsa liliba tsa metsi tse chekang, merafo, geothermal.tikoloho le ho cheka ho phunya.Nako le nako ha ho khoneha, li lokela ho sebelisoa ho phunya masoba a lifofane hobane li hlahisa likotoana tseo ho leng bonolo ho li rema.
3 wings step drag bits ke karolo e le 'ngoe ea kaho ea tšepe ea alloy e nang le malebela a ho seha a tungsten carbide le mahlakoreng a gauge ho netefatsa bophelo bo bolelele.E na le mapheo a 3 le masoba a 3 a phallang.Ha ho bapisoa le mapheo a 4, mapheo a 3 a mapheo a ho hula a atisa ho phunya ka potlako le ka mabifi, athe, a khuts'oanyane a tšoarella ebile a sa tšoarelle.Lebelo la rotary la tafole ea ho hula hanyane e lokela ho ba lipakeng tsa 60 le 80 rpm ka boima bo bobebe holim'a biti (WOB).
Likotoana tse 3 tsa mapheo ke lisebelisoa tsa moruo ha ho cheka libopeho tse bonolo tsa jeoloji le botebo bo sa tebang, li etselitsoe libopeho tse bonolo tse mahareng tse kang Clay, Loam, Silt,Mostsoft-to-medium mobu o nang le mongobo, joalo-joalo. li khothaletsoa ho cheka ho Merafo, Tlhahlobo, Tikoloho, seliba sa Metsi, Geo Exchange, joalo-joalo.
Tlhokomeliso: Bophara le khoele tse bontšitsoeng ka holimo ke boholo bo tloaelehileng, boholo bo bong bo fumaneha ha u kopa.
Khoele ea boholo: 2 3/8'' API Reg, 2 7/8'' API Reg, 3 1/2'' API Reg, 4 1/2'' API Reg, 6 5/8'' API Reg, 2' ' API IF, 2 3/8'' API IF, 2 7/8'' API IF, A Rod, N Rod, AW, BW, NW, AWJ, BWJ, NWJ.
| Bit Diameter | |||||
| (Li-inche) | (mm) | (Li-inche) | (mm) | (Li-inche) | (mm) |
| 3 1/2" | 88.9 limilimithara | 6 1/8" | 155.6 limilimithara | 8 7/8" | 225.4 limilimithara |
| 3 5/8" | 92.1 limilimithara | 6 1/4" | 158.8 limilimithara | 9" | 228.6 limilimithara |
| 3 3/4" | 95.3 limilimithara | 6 1/2" | 165.1 limilimithara | 9 1/8" | 231.8mm |
| 3 7/8" | 98.4 limilimithara | 6 5/8" | 168.3 limilimithara | 9 1/4" | 235.0 limilimithara |
| 4" | 101.6 limilimithara | 6 3/4" | 171.5 limilimithara | 9 1/2" | 241.3 limilimithara |
| 4 1/8" | 104.8 limilimithara | 6 7/8" | 174.6 limilimithara | 9 5/8" | 244.5 limilimithara |
| 4 1/4" | 108.0 limilimithara | 7" | 177.8mm | 9 3/4" | 247.7 limilimithara |
| 4 1/2" | 114.3 limilimithara | 7 1/8" | 181.0 limilimithara | 9 7/8" | 250.8mm |
| 4 5/8" | 117.5 limilimithara | 7 1/4" | 184.2 limilimithara | 10" | 254.0 limilimithara |
| 4 3/4" | 120.7mm | 7 3/8" | 187.3 limilimithara | 10 5/8" | 269.9 limilimithara |
| 4 7/8" | 123.8mm | 7 1/2" | 190.5 limilimithara | 11 1/2" | 292.1 limilimithara |
| 5" | 127.0 limilimithara | 7 5/8" | 193.7 limilimithara | 12" | 304.8mm |
| 5 1/8" | 130.2 limilimithara | 7 3/4" | 196.9 limilimithara | 12 1/4" | 311.2 limilimithara |
| 5 1/4" | 133.4 limilimithara | 7 7/8" | 200.0mm | 12 1/2" | 317.5 limilimithara |
| 5 3/8" | 136.5 limilimithara | 8" | 203.2 limilimithara | 13 3/4" | 349.3 limilimithara |
| 5 1/2" | 139.7 limilimithara | 8 1/8" | 206.4 limilimithara | 14" | 355.6 limilimithara |
| 5 5/8" | 142.9 limilimithara | 8 1/4" | 209.6 limilimithara | 14 3/4" | 374.7 limilimithara |
| 5 3/4" | 146.1 limilimithara | 8 1/2" | 215.9 limilimithara | 15" | 381.0 limilimithara |
| 5 7/8" | 149.2 limilimithara | 8 5/8" | 219.1 limilimithara | 15 3/4" | 400.1mm |
| 6" | 152.4 limilimithara | 8 3/4" | 222.3 limilimithara | 17 1/2" | 444.5 limilimithara |
Hula liphutheloana tsa Bits
| Bonyane Bongata ba Order | N/A |
| Theko | |
| Lintlha tsa Sephutheloana | Sephutheloana sa Tlhahiso e Tloaelehileng ea Export |
| Nako ea thomello | 7 matsatsi |
| Melao ea Tefo | T/T |
| Matla a Phepelo | E ipapisitse le Taelo e Felletseng |
