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2021-08
Diamond Composite Bit PDC Bit Specifications-Yikuang Technology
A PDC bit is a tool used to drill through or blind holes in solid materials and enlarge existing holes. Commonly used drill bits are twist drill, plane drill, center drill, deep hole drill and sleeve drill. Reamers and countersunk drills are generally classified as drill bits, although they cannot drill into solid materials. High-speed steel hollow drill bit, also known as coring drill bit or hole opener, drill bit classification: high-speed steel drill bit, hard alloy drill bit, tungsten steel drill bit; Cutting depth: 35MM,50MM,100M; Applicable drilling: imported magnetic drill, magnetic drill, domestic magnetic drill, magnetic drill, magnet drill, steel plate drill, magnetic drill, machine tool, bench drill, etc. Diameter
2021-08-17
17
2021-08
The use of drill pipe-beneficial mining technology.
Select the appropriate drill pipe type according to the torque, tension and the minimum radius of curvature allowed by the drill bit. 2. During the construction process, avoid connecting large-diameter drill pipes with small-diameter drill pipes (that is, mixing large and small size drill pipes) to prevent small size drill pipes from breaking or deforming due to insufficient strength. 3. When clamping the drill pipe with a vise, do not clamp the female buckle of the female connector to prevent the female buckle from deforming. 4. Pay attention to the installation of the drill pipe. The preload of the upper buckle should be controlled within 15MPa to avoid difficulty in the hook and loop due to excessive pressure. Avoid baking the joint with fire, reduce the mechanical properties of the joint, (especially the female joint) will affect the use
2021-08-17
17
2021-08
How to prevent the drill from getting stuck
First, when drilling, the downhole drill bit shall not exceed 50KN, the directional well shall not exceed 100KN, and the vertical well and directional well shall not exceed 50KN. (A specific wellbore sequence can be a specific analysis data) Second, surface drilling should ensure sufficient cyclic displacement to completely transport and remove cuttings. After drilling the material, short-term take-off and landing operations should be done to ensure that the wellbore is unblocked; before the formal start of drilling, inject pre-hydrated and thickened mud with a viscosity of 50-60s (the specific amount depends on the size and depth of the hole), To suspend the remaining drill cuttings in the well and prevent drill bit resistance and adhesion. Article 3, in
2021-08-17
16
2021-08
Top 10 mining disasters in world history
1. The Momonga mine disaster in West Virginia (1907) was the worst mine disaster in American history. In 1907, an explosion in the Momonga coal mine in West Virginia killed 362 people. According to statistics, the death toll may exceed 500 people. On December 6, 1907, mines 6 and 8 exploded, and the shock was felt eight miles away. Most of the victims were immigrants from Italy, Poland, Turkey and other European countries working for fairman Coal. The mine disaster left 250 women widowed.
2021-08-16
16
2021-08
On July 24, 2021, the side roof of the goaf of the 11353 coal mining face in the Gantangbian Coal Mine in Fuquan City, Qiannan Prefecture collapsed, causing a single hydraulic pillar to squeeze the on-site operators and killing one person;
2021-08-16
16
2021-08
At about 10: 00 a.m. on July 25, 2021, when the hydraulic support was unloaded from the roadway on the 02 coal mining face in the first level and second mining area of Guo erzhuang mine of Jizhong energy Handan mining group, the hydraulic support on the transportation support pallet car was tilted, causing one person to be squeezed to death.
2021-08-16
16
2021-08
On July 24, 2021, the side roof of the goaf of the underground 11353 coal mining face of Gantangbian Coal Mine in Fuquan City, Qiannan Prefecture collapsed, causing a single hydraulic pillar to squeeze the on-site operators and killing one person.
2021-08-16
16
2021-08
At about 10: 00 a.m. on July 25, 2021, when the hydraulic support was unloaded from the roadway on the 02 coal mining face in the first level and second mining area of Guo erzhuang mine of Jizhong energy Handan mining group, the hydraulic support on the transportation support pallet car was tilted, causing one person to be squeezed to death.
2021-08-16
16
2021-08
According to the Guizhou Energy Bureau, on July 27, 2021, a roof accident occurred in the Guixing Coal Mine in Xingren City, Qianxinan Prefecture, killing one person. Since July, in less than two weeks, there have been three roof accidents in the province, killing a total of three people. The accident reflects that some coal mines have relaxed safety management in order to pursue output efficiency, and there are still serious hidden dangers and deficiencies in on-site roof management. All relevant departments and coal mines in all localities must strictly strengthen the prevention and control of this key disaster, at the same time, they must also strengthen roof management, earnestly implement the system of knocking and asking for the top, and at the same time urge coal mines to strictly implement safety publicity before entering the well.
2021-08-16
16
2021-08
On August 8, 2021, the location of the Dafengshu Coal Mine in Dazhu County, Dazhou City, Sichuan Province was interrupted by heavy rain, which caused power, communications, and traffic. Mountain torrents destroyed the wall of the mine and poured into the mine from the wellhead, causing two water pumping workers to lose contact. The accident rescue is still in progress. The mine is a township coal mine with an approved production capacity of 150000 tons/year and a medium hydrogeological type. In 2020, the mine was identified as the main mine for joint upgrading and transformation of 300000 tons/year, and is still going through the upgrading and transformation procedures. Since the shutdown in December 2019, the mine has maintained the "one stop and four non-stop" (shutdown, no power, no wind, no gas inspection, no drainage)
2021-08-16
