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Integrated Supporting Products for Drilling and Drafting of Large Large Hole Lower Screen Pipe
Key words:
- Product Description
- Instructions for use
- Application Case
- Product Parameters
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- Commodity name: Integrated Supporting Products for Drilling and Drafting of Large Large Hole Lower Screen Pipe
- Commodity ID: 1248589723677118464
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1. product backgroundThe use of regular drilling technology in high-gas soft outburst coal seam drilling is easy to cause hole collapse, holding drilling and other hole events.Therefore, it not only increases the difficulty of drilling construction, but also causes the drainage hole blockage due to the instability and collapse of the hole wall after the completion of drilling construction.plug, affect the drainage effect, how to improve the soft outburst gas extraction concentration and extraction volume has been coal mine gasA major problem of governance. The construction process of lowering the screen from the inner hole of the drill pipe after drilling can solve the problem of drilling.The problem of blockage of the pumping hole caused by collapse, thus improving the pumping effect,2. products matching:
Gas (methane) is an ancient plant in the early accumulation of coal, cellulose and organic matter through the role of anaerobic bacteriaDecomposed. In the high temperature, high pressure environment, in the coal at the same time, due to physical and chemical effects, continue to produceinto gas. The gas exists in the free state and the suction state in the coal or the surrounding rock.Note: The last few sieve tubes at the bottom of the hole are with dense round holes to facilitate the influx of gas at the bottom of the hole.Three product pictures4. construction schemeThe hydraulic crawler provided by the mine is used, with our Φ89mm × 1m large hole grooved drill pipe and Φ120mm diamond PDC drill bit. The drilling diameter is Φ120mm, the drilling design depth is 200 m, the diameter of the screen tube is Φ60mm, and the drilling screen tube is simultaneously laid and drilled by air (water) cooling and dust reduction.
During the drilling operation, the pressure of the drilling rig shall be kept within 6Mpa. When the WOB increases, the advancing operation shall be stopped, the slag shall be discharged by rotation, the water supply ratio shall be reduced rapidly, or the drilling shall be withdrawn until the pressure of the drilling rig returns to the normal value. When drilling, Φ120 diamond PDC drill bit shall be used to drill holes first, then Φ89 large and large hole slotted drill pipes shall be connected in turn, the water tail connecting the drill pipe behind the power head of the drilling machine shall be removed after drilling to a fixed depth, then the suspension device shall be screwed onto a gas screen pipe, the suspension device shall be closed, then the Φ89mm × 1m large and large hole slotted drill pipes shall be inserted into the gas screen pipe in turn, after the drill pipe footage reaches the specified depth, slowly apply force to open the opening and closing blade at the top of the drill bit, then push the suspension device out of the drill bit completely to ensure that the suspension device is completely hung on the coal wall and slowly returns to the lavas screen pipe by hand to ensure that it cannot be pulled. At this time, the suspension device is completely fixed and firm, and then the drill pipe is withdrawn to ensure that the gas screen pipe will not shake and rotate until the hole is sealed and the gas drainage pipe is connected.
In order to ensure the smooth progress of drilling and prevent drilling accidents caused by rock burst, drilling holding and hole collapse deformation, it is strictly prohibited to stop the drill pipe for a long time when it is in the hole. All materials shall be adequately placed on the rig site to prevent sticking during waiting.
When the drill pipe is withdrawn, it should be ensured that the withdrawal is not more than three drill pipes and the drilling rig is rotated for 1-3 minutes. Ensure the hole-forming of the hole and the smooth withdrawal of the drill pipe.
Drill pipe repeated use, should do a good job of cleaning and maintenance. The special thread grease for geological drill pipe distributed by our company can be evenly coated with a brush, which can effectively prevent the occurrence of thread damage and thread seizure, greatly reduce the unscrewing torque of the drill pipe, and multiply the service life of the drill pipe.
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5.advantage and benefit analysis
At present, the large hole lower screen pipe products in the market are mixed, and the product quality is uneven, which brings great troubles to customers in selecting products. They are mainly limited to laying 36mm screen pipe under Φ73mm drill pipe and 50mm screen pipe under Φ89mm drill pipe. For mines with gas concentration exceeding the limit, hole collapse in soft coal seam and need to improve gas extraction efficiency, the above gas screen pipe cannot meet the requirements and is used in dry construction drilling, most of the spiral drill pipe is used, and there is also a lack of formed products for the process of laying the screen pipe of the spiral drill pipe. Our company has actively carried out research and development for the above drilling problems, and has formed a customized drilling scheme for laying the screen pipe with different diameters for different drill pipes. It can save construction cost and improve comprehensive construction efficiency for drilling construction of coal mine units.
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★ COMPANY PROFILE ★
Shandong Yikuang Drilling Technology Co.,Ltd. Located in Linqing City, a famous city of the ancient Beijing-Hangzhou Canal and an important industrial town in Shandong Province, it is located 500 meters south to the west at the intersection of 323 Provincial Highway and 247 Provincial Highway of Youth Sub-district Office. The company has a registered capital of 50 million yuan and the factory covers an area of 100000 ㎡. It is a high-tech enterprise integrating technology development and equipment manufacturing, sales and technical services in the fields of geological drilling, coal mining, engineering anchoring, gas and dust disaster control.
Since its establishment, the company has been committed to the development and application of drilling, mining, anchoring and equipment in coal mines, mines, construction and water conservancy projects, railways, highways, tunnels and bridges. In 2018, "Liaocheng industrial and mining safety protection drilling tool engineering technology research center" was settled here, and was successively rated as "national high-tech enterprise", "provincial specialized and special new enterprise", "science and technology small and medium-sized enterprise" and "Shandong gazelle enterprise" Liaocheng "one enterprise, one technology" R & D center. The company has established long-term strategic cooperative relations with many scientific research institutions and equipment enterprises. The strength of the company, there is a professor, associate professor, doctor, master and other composed of more than 40 people of high-quality scientific and technological personnel. Relying on the talent and technical advantages of many mining universities and strategic cooperation units, and aiming at the needs of coal, mining, construction engineering and other industries, it has developed and produced a number of drilling products and equipment with independent intellectual property rights.
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