What is oil drill pipe? What types of oil drill pipes are there?

What is oil drill pipe?
Oil drill pipe is used for oil well drilling. Drill pipe is characterized by thin wall and light weight per unit length. It mainly provides mud passage and transmits pulling force and torque. (There is also a type of oil drill jack: thick wall, heavy weight per unit length, mainly providing mud passage, transmitting pulling force and torque and providing drilling weight for the drill bit.)

What are the steel grades of oil drill pipes?
Common oil drill pipe steel grades include E75, X95, G105, and S135. (drill pipe size)

Drill pipe is a steel pipe with a thread at the end, used to connect the surface equipment of the drilling rig to the drilling and grinding equipment or bottom hole device at the bottom of the drilling well. The purpose of the drill pipe is to transport drilling mud to the drill bit and to raise, lower or rotate the bottom hole device together with the drill bit. Drill pipe must be able to withstand tremendous internal and external pressure, twisting, bending and vibration. In the process of oil and gas extraction and refining, drill pipe can be used multiple times. Drill pipe is divided into three categories: kelly, drill pipe and weighted drill pipe. The connection sequence is kelly (1 piece) + drill pipe (n pieces, determined by the well depth) + weighted drill pipe (n pieces, determined by the design of the drill tool assembly). It introduces in detail the classification of drill pipes, drill pipe joints, drill pipe specifications, and the steel grade and strength of drill pipes.

What is the length of oil drill pipe?

The length of oil drill pipe is generally about 9 meters and the diameter is 5 inches. In addition, oil drill pipes are rolled seamless steel pipes. In order to strengthen the connection strength between the pipe body and the joints, both ends of the drill pipe body are roughened and thickened. The thickening forms are divided into internal thickening and external thickening according to API standards. There are three types: internal and external thickening. The thickening transition section is generally 20~65mm long, and the longest one can be 120~130 mm.

Oil drill pipe types and their differences?

Oil drill pipe is an important tool in oil drilling and is mainly used for drilling and drilling operations. According to their uses and characteristics, common oil drill pipe types and their differences are as follows:

1. Drilling and workover riser (Drill Pipe): a pipe used to connect drilling tools and drill bits. It is usually made of non-magnetic steel to prevent magnetism from interfering with logging and geomagnetic exploration. According to different needs, it can be divided into standard drill pipe and high-strength drill pipe.
2. Drill Collar: used to connect two sections of drill pipe to increase the total drill pipe weight, enhance drilling and stabilize the wellbore. According to the shape and use, it can be divided into straight drill string and turbulent drill string.
3. Anchor (Stabilizer): used to stabilize the well wall during drilling and prevent well wall collapse and diameter expansion. According to the form and function principle of stabilizing the well wall, it can be divided into cutting type stabilizer and sliding type stabilizer.

4. Magnetic pressure change detector (MWD) in the drill string: By installing a measuring device in the drill string, downhole drilling parameters, including pressure, temperature, vibration, etc., can be monitored in real time to guide drilling operations. These oil drill pipes play different roles in the oil drilling process and are suitable for different working conditions and needs. Based on the well depth, formation properties and work requirements, drilling engineers will select the appropriate oil drill pipe model to complete the drilling task.

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