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Precautions for using non-magnetic drill collars
release time：2023-12-13
source： network
Precautions for using non-magnetic drill collars
1. After use, mud and dirt should be removed, the safety of each component should be checked, then anti rust oil should be applied and stored in a dry and ventilated place.
2. On site inspection, if one of the criteria for repair or scrapping is found, it should be recycled for repair or scrapping.
3. In order to ensure the accuracy of magnetic instrument measurement results, it is necessary to choose the length of the non-magnetic drill collar reasonably.
Detail 1: Drilling for oil exploration is a very strict task, so it is necessary to achieve the most accuracy in every detail. The requirements for drilling tools such as non-magnetic drill collars are also very strict. In order to ensure the accuracy of magnetic measurement instruments such as non-magnetic drill collars, the length of non-magnetic drill collars must be reasonably selected. The length of the non-magnetic drill collar should be selected based on the measurement of the wellbore inclination angle and azimuth angle. When the inclination angle of the well is large, the length of the non-magnetic drill collar should be extended.
Detail 2: When a stabilizer is needed in the middle of a non-magnetic drill collar, attention must be paid to its impact on the magnetic measuring instrument. The best way is to manufacture the stabilizer as a non-magnetic drill collar core with a steel sleeve, which can reduce the impact on the magnetic measuring instrument and save the price of non-magnetic steel.
Non magnetic drill collars are mainly used for monitoring during oil drilling, and their structure is the same as the overall drill collar. Non magnetic drill collars are made of N1310 low-carbon alloy steel, which is forged through strict chemical composition analysis. The material has been tested for mechanical properties to ensure that its hardness, toughness, impact value, and corrosion resistance meet the standards. It has a 120 mm diamondless drill collar inner diameter, good low magnetic permeability, and good mechanical processing performance.
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