Qodista Collar-Slick iyo Spiral Downhole Pipe
Qoorta daloolintu waxay ka samaysan tahay AISI 4145H ama dhammayn birta daawaynta qaab dhismeedka, oo loo habeeyey sida ku cad heerka API SPEC 7.
Guud ahaan habka wax soo saarka ee collar, xogta tijaabada shay kasta ee tijaabada waxqabadka, laga bilaabo bannaanka shaqada, daawaynta kulaylka ilaa isku xidhka dunta iyo habka kale ee wax soo saarka, waa la raadin karaa.
Ogaanshaha qoob-ka-cayaarka 'Drill collars' waa gabi ahaanba sida ku cad heerka API.
Dhammaan duntu waxay maraan daawaynta fosfatization ama naxaasta dahaadhidda si ay u kordhiyaan caabbinta daxalka oo ay uga fogaadaan ifafaale xabagta dunta qalabka.
Shirkaddayadu waxay ku shaqayn kartaa silbashooyinka iyo jeexjeexyada wiishka ee kuleejka daloolista sida shuruudaha isticmaalaha.
Qiyaasta Farsamada：
| Qaabka dunta qoob-ka-cayaarka | OD | Aqoonsiga | Dhererka 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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