Seamless alloy steel pipe is made into drill pipe after many processing steps.Firstly, through the process of steel tube thickening, the surface of the light tube faces the inner bend, and the wall of the steel tube thickens.Next, the thread is machined and plated with copper to increase strength.Then the non-destructive quality control inspection is carried out, followed by the welding of the pipe body joints.After that, the tube will undergo welding heat treatment and final treatment to eliminate welding residual pressure.Before painting and packaging the finished drill pipe, other tests should be carried out on the finished steel pipe, including hardness test, pressure test and non-destructive test.
The drill pipe is a screw tube at the end, which is used to connect the surface equipment of the rig with the drilling and grinding equipment or bottom hole device at the bottom of the well.The purpose of the drill pipe is to transfer torque, transfer drilling fluid, connect and grow the drill string, and deepen the borehole for normal drilling.The drill pipe must be able to withstand great internal and external pressure, distortion, bending and vibration.During the construction of the drilling machine, the drill pipe can be used many times.
The operation steps of attaching drill pipe to water well drilling machine:
1. When the drill pipe needs to be connected to the depth of 1 drill pipe after drilling, first stop the propulsion, then stop the rotation, and close the cooling water;
2. Operate the gripper handle to make the gripper clamp the drill pipe and open the throttle valve (right rotation);
3. The gyrator reverses, and at the same time, it moves backward to feed the cylinder, making the water braid shaft and drill pipe spin off;
4, stop rotating, control fast advance and retreat hand to fast retreat position, make chuck fast back in place;
5. The drill pipe to be added is connected to the previous drill pipe, and the rotary machine is rotating forward. When the water braid axis trapezoidal taper thread and the newly added drill pipe taper thread are screwed in contact, immediately operate the gripper handle, loosen the gripper, and complete the drill pipe adding.
