Drill Collar-Slick and Spiral Downhole Pipe
Hana ʻia ke kola drill mai ka AISI 4145H a i ʻole ka hoʻopau ʻana i ke kila kila kila, i hana ʻia e like me ka API SPEC 7 maʻamau.
Ma ke kaʻina hana holoʻokoʻa o ka drill collar, hiki ke ʻike ʻia ka ʻikepili hōʻike o kēlā me kēia mea hana, mai ka workblank, ka mālama wela a hiki i ka hoʻopili ʻana i ke kaula a me nā kaʻina hana ʻē aʻe.
Loaʻa ka ʻike ʻana o nā kola Drill e like me ka maʻamau API.
Hoʻomaʻamaʻa ʻia nā kaula āpau i ka phosphatization a i ʻole ka hoʻopaʻa ʻana i ke keleawe keleawe i mea e hoʻonui ai i ko lākou pale ʻana i ka corrosion a pale i ke ʻano gluing thread gluing.
Hiki i kā mākou hui ke hana i nā slips a me nā ʻūhā elevator ma ka drill collar e like me nā koi o ka mea hoʻohana.
Nā ʻāpana ʻenehana：
| kŘkohu milo kola wili | OD | ID | Ka lōʻihi mm | ||
| mm | in | mm | in | ||
| NC23-31 | 79.4 | 3-1/8 | 31.8 | 1-1/4 | 9150 |
| NC26-35 | 88.9 | 3-1/2 | 38.1 | 1 1/2 | 9150 |
| NC31-41(2-7/8IF) | 104.8 | 4-1/8 | 50.8 | 2 | 9150 |
| NC35-47 | 120.7 | 4-3/4 | 50.8 | 2 | 9150 |
| NC38-50(3-1/2IF) | 127.0 | 5 | 57.2 | 2-1/4 | 9150 |
| NC44-60 | 152.4 | 6 | 57.2 | 2-1/4 | 9150/9450 |
| NC44-60 | 152.4 | 6 | 71.4 | 2-13/16 | 9150/9450 |
| NC44-62 | 158.8 | 6-1/4 | 57.2 | 2-1/4 | 9150/9450 |
| NC46-62(4IF) | 158.8 | 6-1/4 | 71.4 | 2-13/16 | 9150/9450 |
| NC46-65(4IF) | 165.1 | 6-1/2 | 57.2 | 2-1/4 | 9150/9450 |
| NC46-65(4IF) | 165.1 | 6-1/2 | 71.4 | 2-13/16 | 9150/9450 |
| NC46-67(4IF) | 171.4 | 6-3/4 | 57.2 | 2-1/4 | 9150/9450 |
| NC50-67(4-1/2IF) | 171.4 | 6-3/4 | 71.4 | 2-13/16 | 9150/9450 |
| NC50-70(4-1/2IF) | 177.8 | 7 | 57.2 | 2-1/4 | 9150/9450 |
| NC50-70(4-1/2IF) | 177.8 | 7 | 71.4 | 2-13/16 | 9150/9450 |
| NC50-72(4-1/2IF) | 184.2 | 7-1/4 | 71.4 | 2-13/16 | 9150/9450 |
| NC56-77 | 196.8 | 7-3/4 | 71.4 | 2-13/16 | 9150/9450 |
| NC56-80 | 203.2 | 8 | 71.4 | 2-13/16 | 9150/9450 |
| 6-5/8REG | 209.6 | 8-1/4 | 71.4 | 2-13/16 | 9150/9450 |
| NC61-90 | 228.6 | 9 | 71.4 | 2-13/16 | 9150/9450 |
| 7-5/8REG | 241.3 | 9-1/2 | 76.2 | 3 | 9150/9450 |
| NC70-97 | 247.6 | 9-3/4 | 76.2 | 3 | 9150/9450 |
| NC70-100 | 254.0 | 10 | 76.2 | 3 | 9150/9450 |
| 8-5/8REG | 279.4 | 11 | 76.2 | 3 | 9140/9450 |
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