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The function of square drill rods

The function of square drill rods

The square drill rod is located at the top of the drill string, and its main function is to transmit torque and bear the total amount of the drill string. The driving end face of the square drill rod is divided into square and hexagonal shapes. The most commonly used in oil drilling is square, while the water hole is hexagonal. Due to the wall thickness being about three times larger than the drill rod and made of high-strength alloy steel, it has high tensile and torsional strength.

2023/12/27

The role of petroleum drill rods

The role of petroleum drill rods

Oil drill pipe is a component in a tool that connects the drill bit and transmits power. The typical components of a drill string include: drill bit, drill collar, drill pipe, stabilizer, specialized joint, and square drill rod.

2023/12/25

The difference between drill collars and drill rods

The difference between drill collars and drill rods

The drill collar is attached to the drill pipe and plays a role in overall weighting to prevent deviation. The inner diameter of the drill collar is smaller than that of the drill pipe and the weight is larger than that of the drill pipe. During the drilling process, the drilling pressure is formed by the weight of the drill string (connected by the drill pipe), so the lower part of the drill string is subjected to compressive stress.

2023/12/19

Working principle of non-magnetic drill collars

Working principle of non-magnetic drill collars

The interference magnetic field lines above and below the non-magnetic drill collar have no effect on the measuring instrument, so the non-magnetic drill collar creates a non-magnetic environment for the magnetic measuring instrument, ensuring that the data measured by the magnetic measuring instrument is true geomagnetic field information.

2023/12/15

Precautions for using non-magnetic drill collars

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.

2023/12/13

The function of spiral drill collars

The function of spiral drill collars

Spiral drill collars are used to machine three right-handed spiral grooves on the outer cylindrical surface of circular drill collars. Leave a 305~560mm section at the external threaded end joint and a 457~610mm circular drill collar section without machining spiral grooves at the internal threaded end joint for ease of connection and repair. The weight is 4% less than that of circular drill collars of the same size.

2023/12/11

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