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The function and shape classification of drill collars

The function and shape classification of drill collars

Drill collars are used to increase the weight of the drill string and provide greater drilling pressure to the drill bit, accelerating the drilling speed. Due to its strong rigidity and good stability, it also plays a role in stabilizing the drill bit and maintaining the wellbore trajectory.

2023/12/06

Main features of drill pipe

Main features of drill pipe

The smooth pipe and the raw steel pipe are made into a drill pipe after a number of processing steps. First, through the treatment of the steel pipe thickening process, the outer surface of the steel pipe is bent inward, and the steel pipe wall is thickened. Next, thread processing is performed and plated with copper to increase strength. A non-destructive quality control inspection is then performed, followed by welding of the steel pipe body joint.

2023/08/25

What is drill pipe

What is drill pipe

A drill pipe is a steel pipe with a thread at the tail, which is used to connect the surface equipment of the drilling rig and the drilling and grinding equipment or bottom hole device at the bottom of the drilling. The purpose of the drill pipe is to carry drilling mud to the drill bit and to raise, lower or rotate the bottom hole device together with the drill bit. The drill pipe must be able to withstand huge internal and external pressure, distortion, bending and vibration. In the process of oil and gas extraction and refining, drill pipe can be used many times.

2023/08/25

What should be paid attention to for daily maintenance of weighted drill pipes?

What should be paid attention to for daily maintenance of weighted drill pipes?

1, the cleaning part adopts a closed protective structure, the environment is clean, to ensure safety. 2. The external cleaning of sucker rod adopts inclined roller to rotate forward, frequency conversion speed regulation, rotation and propulsion speed can be adjusted. 3, the use of PLC detection and control system, manual and automatic two control methods (can be designed according to user requirements). 4. The external cleaning of the weighted drill pipe adopts intermediate frequency induction heating to the outer surface of the pipe, which is cleaned by a rotating steel brush, rinsed with clear water at the same time, and then derusted through a derusting box. The heating temperature of the pipe surface is controllable and adjustable, and is not affected by the seasonal temperature. The cleaning and derusting effect is completed at the same time.

2023/08/25

What are the main corrosive agents of oil drill pipe steel?

What are the main corrosive agents of oil drill pipe steel?

As long as the drill pipe through the drilling bend, even if the tension is eliminated, the accumulation of fatigue damage still exists, so if repeated several times through the drilling bend, it is possible to cause fatigue damage to the drill pipe. It should also be seen that a drill pipe may have been damaged even if there is no accident in a certain well. Therefore. When it is used again in the same well or other wells, although it is connected to the top of the drill string, even if the bending stress acting on the drill pipe is within the rated value, it may not be able to withstand it, resulting in accidents.

2023/08/25

What should be paid attention to before installing oil drill pipe?

What should be paid attention to before installing oil drill pipe?

In the construction process, when using trenchless drill pipes, it is necessary to avoid connecting diameter drill pipes with small diameter drill pipes, I .e. mixed use of large and small drill pipes, so as to prevent small drill pipes from being broken or deformed due to insufficient strength. Attention should be paid to clean up the female buckle and the male buckle in time before installing the oil drill pipe, and apply thread oil to prevent premature wear or damage of the button.

2023/08/23

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