Likarolo tsa Molala le Pipe
Molala oa ho cheka o sebelisoa haholo-holo bakeng sa ho fana ka likotoana tsa ho phunya ka khatello e hlokahalang ea ho cheka, ho netefatsa hore matla a ho hula a fetisetsoa ho phaephe ea ho cheka le ho beha karoloana ea ho cheka bohareng.Ho latela litlhaloso tsa API Spec7-1, boleng ba thepa ke 4145H ka mor'a kalafo ea mocheso, kalafo e thatafatsang ea likhoele le phosphate ho thibela ho ts'oaroa hantle.E ka boela ea hlahisoa ho latela litlhoko tsa bareki.
Molala oa Heavy Weight Drill ke karolo ea bohlokoa ea ts'ebetso ea Jcdrilllithulusi tsa ho cheka mekoti.Li-collars tsa ho cheka li fana ka boima ba 'mele bakeng sa ho cheka ka libopeho.Li-Rig drillers li khona ho lekola boima bo sebelisitsoeng ho bit ka ho beha leihlo ka lipalo tse bonolo, le sekala sa sesupo sa boima, mokatong oa rig.Li-collars tsa ho cheka hangata li bolelele ba limithara tse 31, tse teteaneng le litšepe tse boima.Li tla ka lebokose le nang le likhokahano tse tšoanang, e le hore li kopane ka hohle kamoo ho hlokahalang, ho fihlela boima bo lakatsehang.Li-collars tse chekang li tla OD e boreleli, kapa e entsoe ka li-helical grooves (likhola tse spiral).Jink e boloka phepelo e ngata ea liboro tsa tšepe ea k'habone setokong.Morero oa li-Collar lead ke ho beha sebaka se sekhuts'oane lipakeng tsa karolo ea ho cheka, le haufi le "bit stabilizer".Ena ke tsela e 'ngoe feela ea Jcdrill e u fang bokhoni ba ho ntlafatsa litlhoko tsa hau tsa ts'ebetso ha mathata a ntse a hlaha.Ka ho eketsa sebaka sena se sekhutšoane pakeng tsa bit, le haufi le ho hlaba, u thatafatsa BHA wright hanyane, ho fokotsa ho tsamaea, ka hona, ho phahamisa lesoba le otlolohileng.Jcdrill e boloka phepelo e ngata ea li-collar tsa lead tsa carbon steel stock.
| m | |||||
| Moralo | O | D | ID | Lengh | Chamfer Diameter |
| in | mm | + 1.6-0.0mm | + 152.4 limilimithara | + 0.4 limilimithara | |
| NC23-31 | 3 1/8 | 79.4 | 31.8 | 9.15 | 76.2 |
| NC26-35 | 3 1/2 | 88.9 | 38.1 | 9.15 | 82.9 |
| NC31-41 | 4 1/8 | 104.8 | 50.8 | 9.159.45 | 100.4 |
| NC35-47 | 4 3/4 | 120.7 | 50.8 | 9.159.45 | 114.7 |
| NC38-50 | 5 | 127 | 57.2 | 9.159.45 | 121 |
| NC44-60 | 6 | 152.4 | 57.2 | 9.159.45 | 144.5 |
| NC44-60 | 6 | 152.4 | 71.4 | 9.159.45 | 144.5 |
| NC44-62 | 6 1/4 | 158.8 | 57.2 | 9.159.45 | 149.2 |
| NC44-62 | 6 1/4 | 158.5 | 71.4 | 9.159.45 | 150 |
| NC46-65 | 6 1/2 | 165.1 | 57.2 | 9.159.45 | 154.8 |
| NC46-65 | 6 1/2 | 165.1 | 71.4 | 9.159.45 | 154.8 |
| NC46-67 | 6 3/4 | 171.5 | 57.2 | 9.159.45 | 159.5 |
| NC50-70 | 7 | 177.8 | 57.2 | 9.159.45 | 164.7 |
| NC50-70 | 7 | 177.8 | 71.4 | 9.159.45 | 164.7 |
| NC50-72 | 7 1/4 | 184.2 | 71.4 | 9.159.45 | 169.5 |
| NC56-77 | 7 3/4 | 196.9 | 71.4 | 9.159.45 | 185.3 |
| NC56-80 | 8 | 203.2 | 71.4 | 9.159.45 | 190.1 |
| 6 5/8REG | 8 1/4 | 209.6 | 71.4 | 9.159.45 | 195.7 |
| NC61-90 | 9 | 228.6 | 71.4 | 9.159.45 | 212.7 |
| 7 5/8REG | 9 1/2 | 241.3 | 76.2 | 9.159.45 | 223.8 |
| NC70-97 | 9 3/4 | 247.7 | 76.2 | 9.159.45 | 232.6 |
| NC70-100 | 10 | 254 | 76.2 | 9.159.45 | 237.3 |
| 8 5/8REGc | 11 | 279.4 | 76.2 | 9.159.45 | 266.7 |
