How To Deal with The Sticking of Rotary Drilling Rig

In the construction, the rotary drilling rig plays an important role, but the problems such as stuck drilling are often troubled by the construction personnel. Next, we will introduce in detail the effective methods to deal with the sticking of rotary drilling rig.

1. Preparation before drilling: fully study the geological report to understand the formation. For strata prone to hole collapse, such as sand egg layer and fluid sand layer, the performance of wall protection fluid should be adjusted in advance, and long protection cylinder should be buried to prevent large area hole collapse.

2. Control the penetration depth: the operator should control the penetration depth when drilling deep, such as 15 meters deep drilling, and the depth of drilling is generally not more than 40 centimeters. Reducing factor should be considered when drilling in clay layer. During the formation conversion, pay attention to the rule of change, do not blindly pressure.

3. Maintain the drill bit: When making the drill bit, the diameter of the drill barrel should be less than 6 cm of the hole diameter. Repair the bit in time during use, replace or repair the worn side teeth and side teeth, ensure the hole size, and ensure the effective bit hook.

4. Rig maintenance: pay attention to rig maintenance and repair, check engine power to avoid insufficient power. Maintain hydraulic system to prevent system pressure drop. Always check the wire rope, movable joints, etc., to ensure that the drill pin is properly assembled.

5. Adjust the wall protection fluid: adjust the density and viscosity of the wall protection fluid, so that the bottom of the hole is free of sediment for a short time. In this way, when the equipment fails, there is enough time to remove it and reduce the risk of sticking.

6. Sticking treatment: When sticking occurs, first analyze the cause and measure the depth. Hole collapse or equipment failure caused by stuck drilling, thick sediment first clean the hole, and then treatment. Non-collapse factors stuck drilling, less sediment can be self-rescue, such as adjusting the pressure of the hydraulic system, positive and negative rotation of the drill pipe. If self-rescue is ineffective, auxiliary equipment is used, such as direct lifting method, dredging method around drill bit, wall protection excavation method, etc.

The construction of rotary drilling rig brings trouble, but as long as we take preventive measures and calmly deal with problems, we can reduce losses and ensure the smooth progress of construction.