ã€China Deep Hole Rig Trading Network】 Reasons and Treatments of Slipping When Rotary Drilling Rig Drilled Mudstone When the rotary drilling rig drills into mudstone or sandstone, slippage often occurs, that is, there is no resistance and pressure is not added, which makes it difficult to drill or drill, thereby affecting the construction progress and production efficiency. After a long period of construction and experience, I have also participated in many mudstone geological foundation construction projects and have some understanding and insights into drilling mudstones, and through geology. Drilling tools and operation integration. Finally cracked the mudstone drilling problem. I. Mudstone Overview Sedimentary rocks such as mudstones, sandy mudstones, muddy sandstones, sandstones, and shales are rich in oxides that are red, dark red, or brown. These rocks are collectively called red sandstones. The red sandstone is mainly composed of two types of granular structure: granular debris structure and muddy cement structure. Most of the red sandstone can be disintegrated, broken, or even muddy by the action of the atmosphere. Therefore, the size and particle size distribution of the rock block will change with the time course of the wet and dry cycle. Mudstone is a kind of sedimentary rock that is solidified by mud and clay. Its composition and structure are similar to that of shale, but it is less brittle. A layered or textured clay rock. Mudstone has water absorption and adhesion characteristics. Second, the reasons for slipping During the construction process, if the dry hole is drilled into the mudstone, the spiral drilling rig is used to drill efficiently. If the double-bottomed sand hopper is selected, it can also be drilled, but the load is relatively large. Once the water in the hole immediately begins to skid, it slips. There is a direct relationship with water or mud, so the main reason for mudstone slip is composed of the following: 1 hardness of mudstone, 2 water or mud lubrication, 3 muddy water softening and so on. Third, different drilling tools drilling 1. When the auger drills into the mudstone of the water hole, the mudstone encounters water softening, and the cone head at the front end of the auger bucket will be filled with mudstone and dregs to form an integral part. The drilling tool will lose the drilling effect and cannot continue drilling. The water or mud enters between the drilling hopper and mudstone and lubricates, forming a slip. (2) When using a double-bottom cutting bite drilled into the mudstone water hole, because the cutting bit drilling method uses the alloy head of the front end to drill in, the alloy head can easily break into the mudstone, but due to the short front alloy head, the fixed alloy head The pick must follow the cut in, but the pick is too blunt to form a resistance. Because the pick breaks into the mudstone too shallow, the mudstone is cemented, so it can not reach the crushing effect, so it cannot continue drilling, water or mud. When it enters between pick and mudstone and lubricates, it forms slip. For more information, please pay attention to the China Deep Hole Rig Trading Network () Heavy Duty Electric Cylinder With Roller Screw Heavy Duty Electric Cylinder,Planetary Roller Screw Electric Cylinder,High Thrust Force Electric Cylinder,High Precision Electric Cylinder,Ball Screw Electric Cylinder,Planetary Roller Electric Cylinder,High Tonnage Linear Actuator Shenzhen Packway Technology Development Co., LTD , https://www.packwaymachines.com