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API 7-1 Nmdc Non-Magnetic Drill Collar

Description

What is a non-magnetic drill collar?

Non-magnetic drill collar belongs to the category of drilling tools in the petroleum equipment industry. It is an important tool used in petroleum drilling, and its main functions include providing drilling pressure, ensuring strength under compression conditions, and reducing the vibration of the drill bit. Non-magnetic drill collar is usually made of special alloy steel, with low magnetic permeability and good mechanical processing performance. Its structure is the same as that of the integral drill collar, but the material undergoes strict chemical composition analysis and forging treatment. In the process of drilling, the non-magnetic drill collar can reduce the interference of the magnetic field on the drilling instruments and measuring equipment to ensure the accuracy of drilling data. In addition, it can also prevent the drill collar from being corroded and worn underground, and extend the service life. According to different drilling needs, there are various specifications and models of non-magnetic drill collars for selection. When using the non-magnetic drill collar, it is necessary to conduct reasonable selection and operation according to the actual situation to ensure the safety and efficiency of drilling operations.

What are the advantages of this product?

  1. API certification
  2. It is made of high-quality alloy steel and undergoes strict composition analysis and composition forging treatment.
  3. Provide bit weight to drill bit so that drill pipe is in tension.especially drill collar can keep drill bit centralized

The connection mode and size of the product?

Connection Style and Size OD ID Length mm DF     mm Bending ratio
mm in mm in
NC23 79.4 3 1/8 31.8 1 1/4 9150 76.2 2.57:1
NC26 88.9 3 1/2 38.1 1 1/2 9150 82.9 2.42:1
NC31 104.8 4 1/8 50.8 2 9150 or 9450 100.4 2.43:1
NC35 120.7 4 3/4 50.8 2 9150 or 9450 114.7 2.58:1
NC38 127 5 57.2 2 1/4 9150 or 9450 121 2.38:1
NC44 152.4 6 57.2 2 1/4 9150 or 9450 144.5 2.49:1
NC44 152.4 6 71.4 2 13/16 9150 or 9450 144.5 2.84:1
NC44 158.8 6 1/4 57.2 2 1/4 9150 or 9450 149.2 2.91:1
NC46 158.8 6 1/4 71.4 2 13/16 9150 or 9450 150 2.63:1
NC46 165.1 6 1/2 57.2 2 1/4 9150 or 9450 154.8 2.76:1
NC46 165.1 6 1/2 71.4 2 13/16 9150 or 9450 154.8 3.05:1
NC46 171.4 6 3/4 57.2 2 1/4 9150 or 9450 159.5 3.18:1
NC50 171.4 6 3/4 71.4 2 13/16 9150 or 9450 159.5 2.37:1
NC50 177.8 7 57.2 2 1/4 9150 or 9450 164.7 2.54:1
NC50 177.8 7 71.4 2 13/16 9150 or 9450 164.7 2.73:1
NC50 184.2 7 1/4 71.4 2 13/16 9150 or 9450 169.5 3.12:1
NC56 196.8 7 3/4 71.4 2 13/16 9150 or 9450 185.3 2.70:1
NC56 203.2 8 71.4 2 13/16 9150 or 9450 190.1 3.02:1
6 5/8REG 209.6 8 1/4 71.4 2 13/16 9150 or 9450 195.7 2.93:1
NC61 228.6 9 71.4 2 13/16 9150 or 9450 212.7 3.17:1
7 5/8REG 241.3 9 1/2 76.2 3 9150 or 9450 223.8 2.81:1
NC70 247.6 9 3/4 76.2 3 9150 or 9450 232.6 2.57:1
NC70 254 10 76.2 3 9150 or 9450 237.3 2.81:1
8 5/8REG 279.4 11 76.2 3 9150 or 9450 266.7 2.84:1

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