
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.
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.
The functions of drill pipe:
Drilling drill pipe is a multi-segmented tool on the drilling platform that hangs down with the drill string. It is mainly used to lower the drill bit and other materials to the bottom of the well, and at the same time bring away the oil, natural gas, water and other substances at the bottom of the well. Come up. In drilling operations, drilling drill pipe is one of the indispensable tools because it can complete the following important tasks:
1. Provide necessary strength and stiffness
Drilling drill pipe needs to bear the weight of tools such as drill bits and the torsional and lateral forces generated during drilling. Therefore, it needs to have a certain strength and stiffness to ensure the stability and safety of drilling.
2. Transfer power and torque
Drilling drill pipe not only needs to bear the weight of tools such as drill bits, but also needs to transfer the power and torque generated by the drilling rig to ensure smooth drilling.
3. Transfer fluids and samples
The inner hollow of the drilling drill pipe can be used to transport fluids such as drilling fluids and fracturing fluids, as well as materials such as rock and soil samples, so as to facilitate timely collection and analysis of geological exploration work.
Importance of drill Pipe:
Drilling drill pipe plays a very important role in drilling operations. It is not only the core component of the entire drilling system, but also a necessary tool to complete drilling tasks. In addition, drilling drill pipe also has the following important functions:
1. Ensure drilling safety and stability
Drilling drill pipe needs to bear the weight and torsion force of drill bits and other tools, and must have a certain strength and stiffness to ensure the safety and stability of drilling.
2. Collect geological samples and fluids
The inner hollow of the drilling rod can be used to transport rock, soil and other samples and liquids, and can provide reliable support for drilling geological exploration work.
3. Solve drilling problems
The tool boxes and equipment provided by the drilling pipe and drilling platform can deal with various drilling problems, such as the drill bit getting stuck in the drilling hole, formation collapse, etc.
Read more: Drill pipe connection method or Casing pipe vs Drill pipe
Related information