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Address: Room 1407,BuildingA,No.13,Beiyuan Road,Chaoyang District,Beijing,China
Contact name:Sekura Yu
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API7-1 175 Deep Hole Water Well Drilling Spiral Drill Collars 800kgs
Application
Drill collar is mainly used for providing drill bits with required drilling pressure, ensuring pull force transmitted to drill pipe and centralize the drill bit. According to API Spec7-1 specifications, the material quality is 4145H that’s after heat treatment, thread hardening treatment and phosphate to better anti-seize. It also can be produced upon customers’ requirements.
Characteristics
Heavy Weight Drill collar is an essential part of the performance of Jinke down hole drilling tools. Drill collars provide weight on bit for drilling through formations. Rig drillers are able to monitor weight applied to bit by monitoring through simple calculations, and a weight indicator scale, on rig floor. Drill collars are typically 31’ feet in length,thick walled, and heavy steel. They come
JCDRILL keeps a generous supply of carbon steel drill collars in stock. Lead Collar Lead collars purpose is to put a short amount of space between the drilling bit, and near bit stabilizer. This is just another way Jinke gives you the ability to tweak your performance needs as down hole challenges arise. By adding this short spacing between bit, and near bit stab, you stiffen the BHA wright at the bit, reducing bit walk, therefore, promoting a straighter hole. Jinke keeps a generous supply of carbon steel lead collars in stock.
Specification
| Drill collar number | Outside diameter | Bore | Length | Beveldiameter | Reference bending | |||
| And connection label | D | d | L | DF | strength ratio | |||
| in | mm | in | mm | ft | m | mm | BSR | |
| NC23 – 31 | 3 1/8 | 79.4 | 1 1/4 | 31.8 | 30 | 9.14 | 76.2 | 2.57:1 |
| NC 26 – 35 | 3 1/2 | 88.9 | 1 1/2 | 38.1 | 30 | 9.14 | 82.9 | 2.42:1 |
| NC31 – 41 | 4 1/8 | 104.8 | 2 | 50.8 | 30/31 | 9.14/9.45 | 100.4 | 2.43:1 |
| NC 35 – 47 | 4 3/4 | 120.7 | 2 | 50.8 | 30/31 | 9.14/9.45 | 114.7 | 2.58:1 |
| NC 38 – 50 | 5 | 127 | 2 1/4 | 57.2 | 30/31 | 9.14/9.45 | 121 | 2.38:1 |
| NC 44 – 60 | 6 | 152.4 | 2 1/4 | 57.2 | 30/31 | 9.14/9.45 | 144.5 | 2.49:1 |
| NC 44 – 60 | 6 | 152.4 | 2 13/16 | 71.4 | 30/31 | 9.14/9.45 | 144.5 | 2.84:1 |
| NC 44 – 62 | 6 1/4 | 158.8 | 2 1/4 | 57.2 | 30/31 | 9.14/9.45 | 149.2 | 2.91:1 |
| NC46 – 62 | 6 1/4 | 158.8 | 2 13/16 | 71.4 | 30/31 | 9.14/9.45 | 150 | 2.63:1 |
| NC46 – 65 | 6 1/2 | 165.1 | 2 1/4 | 57.2 | 30/31 | 9.14/9.45 | 154.8 | 2.76:1 |
| NC46 – 65 | 6 1/2 | 165.1 | 2 13/16 | 71.4 | 30/31 | 9.14/9.45 | 154.8 | 3.05:1 |
| NC46 – 67 | 6 3/4 | 171.4 | 2 1/4 | 57.2 | 30/31 | 9.14/9.45 | 159.5 | 3.18:1 |
| NC 50 – 70 | 7 | 177.8 | 2 1/4 | 57.2 | 30/31 | 9.14/9.45 | 164.7 | 2.54:1 |
| NC 50 – 70 | 7 | 177.8 | 2 13/16 | 71.4 | 30/31 | 9.14/9.45 | 164.7 | 2.73:1 |
| NC50 – 72 | 7 1/4 | 184.2 | 2 13/16 | 71.4 | 30/31 | 9.14/9.45 | 169.5 | 3.12:1 |
| NC56 – 77 | 7 3/4 | 196.8 | 2 13/16 | 71.4 | 30/31 | 9.14/9.45 | 185.3 | 2.70:1 |
| NC56 – 80 | 8 | 203.2 | 2 13/16 | 71.4 | 30/31 | 9.14/9.45 | 190.1 | 3.02:1 |
| 6 5/8 REG | 8 1/4 | 209.6 | 2 13/16 | 71.4 | 30/31 | 9.14/9.45 | 195.6 | 2.93:1 |
| NC61 – 90 | 9 | 228.6 | 2 13/16 | 71.4 | 30/31 | 9.14/9.45 | 212.7 | 3.17:1 |
| 7 5/8 REG | 9 1/2 | 241.3 | 3 | 76.2 | 30/31 | 9.14/9.45 | 223.8 | 2.81:1 |
| NC70 - 97 | 9 3/4 | 247.6 | 3 | 76.2 | 30/31 | 9.14/9.45 | 232.6 | 2.57:1 |
| NC70– 100 | 10 | 254 | 3 | 76.2 | 30/31 | 9.14/9.45 | 237.3 | 2.81:1 |
| 8 5/8 REG | 11 | 279.4 | 3 | 76.2 | 30/31 | 9.14/9.45 | 266.7 | 2.84:1 |
Packing& Delivery
Service
In our after sales service system, We establish perfect control system strictly according to ISO-9000 series, in this system, technology date and problem solve solution and preventive measures will be provided in any maintain project, all the spare parts will be used in new OEM products with installation instructions, packing list, manufacturer's instruction, qualification and Warranty certificate.
We provide "one equipment & one case, endless service, namely
the after sales service begin from the order confirmation, last for
the working life of the equipment.
