Blog Information

• Posted By : drilling kaiqiu
• Posted On : Sep 24, 2020
• Views : 217
• Category : Cars
• Description : Advantages Compared with rotary drills, Extension Drilling Tools has incomparable advantages.

Overview

• 1 Advantages Compared with rotary drills, Extension Drilling Tools has incomparable advantages.
  (1) The hydraulic drive power head can realize stepless speed regulation, which can meet the requirements of different drilling processes;
  (2) There is no need to use kelly, which can save a lot of auxiliary time when lifting the drilling tool, thereby increasing the pure drilling time;
  (3) Through hydraulic control, it can realize the hydraulic pressure feeding and decompression drilling of the drilling tool; 　　
  (4) The drilling tool can be lifted while rotating, which is convenient to deal with the collapse in the hole and reduces the accident in the hole; 　　
  (5) Power head drilling rigs are all long-stroke feed methods, which meet the requirements of high speed for multi-process drilling machinery; 　　 　　
  (6) The degree of mechanization is relatively high, reducing labor intensity;
  (7) The connection between the components is only connected by pipelines, so hydraulically driven drilling rigs are easy to modify, and different mechanisms can be easily added according to the requirements of use;
  (8) Since the rotary feed and the drilling tool can be operated simultaneously, and the hydraulic power system is configured, the drilling rig can quickly change different drilling techniques when needed;
  (9) As the drilling tool is equipped with power head feed function, the following operations can be achieved:
  ①During deep hole drilling, the drill gyroscope type gravity tension structure can be used for decompression drilling to improve the vertical accuracy of the drilling;
  ②Using the positive pressure feed of the drill pipe and the grouting plug, the cement mortar can be injected into the hole wall in the casing, so that the cement mortar is pressed to the four sides of the hole wall, resulting in pressure infiltration to fill the gaps between the hole walls to meet the sealing requirements. No need to use cement mortar grouting pump;
  ③When it is difficult to lower the casing, the feed force of the power head can be used to press the casing into the hole. If it is still difficult to press in, a pneumatic down-the-hole hammer can be connected to the rotary shaft end of the power head and pass through the wood. Plate cushion pressure, using the pneumatic impact energy of the down-the-hole hammer to impact the casing and press it into the hole to complete the lowering process of the casing.
  2 Disadvantages: Reaming Bit also has the following shortcomings compared with mechanical rotary drilling rigs.
  (1) The cost is relatively high: Because the full hydraulic drilling rigs are mostly vehicle-mounted, the drilling rigs must meet the requirements of different drilling processes, and the operation must be convenient and quick, so the equipment is complex and huge. Moreover, because the full hydraulic power head drilling rigs are hydraulically driven, There are many hydraulic components and high requirements on the quality of hydraulic components, which makes the cost of drilling rigs much higher than that of ordinary rotary drilling rigs;
  (2) Difficulty in maintenance: Rotary drilling rigs are usually mechanically driven. Generally, mechanical failures are not easy to occur. Even if failures occur, they are easy to repair. For full hydraulic drilling rigs, the hydraulic system often has hundreds of hydraulic pipelines and dozens of hydraulic pipelines. It is composed of two working valve groups. In the use of the drilling rig, sometimes a series of problems that the drilling rig cannot work due to the failure of the hydraulic system will occur. It is necessary to find the source of the problem in hundreds of hydraulic pipelines and dozens of working valve groups. Difficulty in diagnosis and maintenance of equipment problems;
  (3) Low trip efficiency: The mast height of the truck mounted water well drilling rig is limited, the trip root is shorter, and the number of trips increases. Compared with the bulk drill tower, the trip efficiency is lower. The continuous increase of the root length, the influence of the length of the standing root on the construction time is gradually obvious.