It is a good drill pipe to withstand tremendous internal and external pressure.
Release date:2018-03-25 Author:http://www.z-1.net.cn/ Click:
The drill pipe is a steel pipe with a striped tail, which is used to connect the surface equipment of drilling rig and drilling and grinding equipment or bottom hole device at the bottom of drilling. The purpose of the drill pipe is to transport the drilling mud to the drill bit and raise, lower or rotate the bottom hole device together with the drill bit. The drill pipe must be able to withstand tremendous internal and external pressure, distortion, bending and vibration. In the process of oil and gas extraction and extraction, drill pipes can be used many times.
Light pipes and raw steel pipes are made into drill pipes after many processing steps. First of all, through the treatment of steel pipe thickening process, the outer surface of the tube faces the inner bend, and the steel tube wall is thickened. Next, thread processing and plating copper which can increase strength. Then the non-destructive quality control test is carried out, and then the welded joints of the steel pipe joints are carried out. After that, the tube experiences welding heat treatment and welding final treatment to eliminate welding residual pressure. Other tests should be carried out before finishing and painting the finished drill pipe, including hardness test, pressure test and non-destructive test.
The drill rod is suspended slowly with the main hoist, allowing the guide rail to face the quasi mast track surface, through the power head key sleeve, then the mast is reacted and the sliding ear is fastened; finally, the mast is erect and the drilling tool is installed.
Turn on the car, make the drilling tool position, drive the power head to rotate, drive the drilling tool to move and drill. When the hard soil is encountered, the drill pipe is pressurized until the 2/3 is filled with the drill tool, and then the drill is lifted.
When drilling, the power head reverses 1~2 circles to close Doumen. At the same time, the main hoist and power head are raised, and the drilling tools are raised from the holes.
When using the machine lock drill rod, the drill rod is raised 0.3 to 0.5 meters (the main hoist is not moving) with the power head. After reversing 2~3 circles, the drill rod is raised with the main hoist, and the drilling tool is put forward from the hole.
Turn on the vehicle to the unloading position and press the power head, so that Doumen can be opened and the soil will be poured out.