How to adjust the construction angle of horizontal directional drilling rig

Horizontal directional drilling rig is a high-precision and high-efficiency drilling equipment, which is widely used in urban gas, oil mining, traffic tunnels, water conservancy and hydropower, subway engineering, etc. During the construction process, the construction angle needs to be adjusted according to different geological conditions and drilling requirements. This article will introduce the construction angle adjustment methods and precautions of horizontal directional drilling rigs.

We need to understand how a drill rig works. The drill pipe and motor transmission device are used to control the direction and angle of the drill bit. Through horizontal movement and rotation operations, it is possible to pass through rock formation obstacles in different underground directions and complete the drilling of the wellbore. In construction, adjusting the angle is to control the direction of the drill pipe to ensure that the drill bit can complete the drilling work according to the predetermined path.

For different construction requirements, the angles that the horizontal directional drilling rig needs to be adjusted are also different. Generally speaking, construction angles are divided into two types: "horizontal angle" and "vertical angle". The horizontal angle refers to the angle of the wellbore in the horizontal direction, while the vertical angle refers to the angle of the wellbore in the vertical direction. During the drilling process, if the direction of the wellbore needs to be changed, these two angles need to be adjusted.

The method of adjusting the horizontal angle is relatively simple, generally by controlling the rotation of the drill pipe to keep the direction of the drill bit consistent with the direction to be drilled. During the actual construction process, the following points need to be noted:

The drilling direction must be consistent with the design direction, and no deviation is allowed.

During the drilling process, the position of the drill bit and the direction of the wellbore need to be checked regularly based on the drilling depth and geological conditions.

If it is found that the drill bit is offset or the wellbore is in the wrong direction, it needs to be adjusted in time.

The method of adjusting the vertical angle is relatively complicated and generally requires comprehensive consideration based on the actual situation. During the construction process, you need to pay attention to the following points:

Determine the appropriate angle based on drilling depth and geological conditions.

If multiple layers of formation need to be drilled, comprehensive considerations need to be made based on the geological conditions.

During the drilling process, the high and low position of the drill bit will also affect the vertical angle and needs to be adjusted.

If the drill bit encounters difficulties, it needs to be shut down for inspection as soon as possible to avoid drilling failure.