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30
2022-10
What percentage of the world's coal reserves are in China?
China has 188.6 billion tons of proven coal reserves that can be directly utilized, 145 tons of proven coal reserves per capita, and 1.45 tons of coal per capita per year.
2022-10-30
11
2021-05
Low pressure gas-liquid driven reamer
In recent years, a variety of technologies have been developed and applied in coal seam permeability increasing mining technology, and many schemes have been discussed and used in many areas for coal seam gas extraction technology in bottom drainage tunnel. At present, the most widely used hole bottom hole drilling technology is an effective solution to increase the concentration of gas extraction. Using high-pressure water to punch holes can quickly and effectively achieve the purpose of hole bottom hole making, the water jet is used to break and cut the coal seam in the relative position, which increases the local space and thus improves the gas extraction rate. However, in case of soft coal seam with excessive gas content and loose coal quality, the coal powder is washed with high-pressure water, which is easy to cause the foaming flow of coal powder.
2021-05-11
17
2021-03
1. features 1. The construction process is simple, operable and easy to organize and implement. Through site investigation, design the crossing line, connect the drill bit and pipeline, and the drilling rig is in place, then construction can begin. 2. It does not pollute the environment, does not affect traffic, has little damage to the ground, and can meet the requirements of high environmental protection for urban underground pipe network construction. 3, low cost, significant social and economic benefits, can reduce the administrative examination and approval of excavation, convenient construction organization, low comprehensive cost. 4, good safety, due to the use of pipe construction, construction personnel operations are carried out on the ground, to avoid the impact of deep foundation pit operations and other adverse construction conditions, improve the safety system.
2021-03-17
16
2021-03
The main body circular grooved drill pipe, rib drill pipe and special-shaped multi-edge grooved drill pipe all have cooling function, especially the latter has directional righting function (not easy to collapse holes, good hole forming quality), taking into account multiple slag discharge principles, and will become the main drilling tool for gas extraction deep hole drilling. Compared with the current coal mine gas drainage using smooth round drill pipe and ordinary triangular drill pipe, because the rod body has no groove structure, protruding coal seam, especially soft coal seam, should not use hydraulic slag drilling. Dry drilling lacks cooling function under blockage (cinder cannot move along the axial direction). Comprehensive comparison, special-shaped multi-edge grooved drill pipe, with hole protection, pressure relief, support
2021-03-16
16
2021-03
Pneumatic crawler drilling rig-geological drill pipe-triangular drill pipe-beneficial mine
Http://www.ykzckj.com/product/1063.htmZQLC型气动履带式钻机是一种以压缩空气为动力,履带行走式轻型深孔钻机 。 It is mainly composed of crawler assembly, chassis assembly, drive assembly, fuel tank assembly, control assembly, column assembly, host assembly, hose assembly and other parts. It has the advantages of 360 ° horizontal angle drilling. Track assembly The track assembly is composed of guide wheels, rollers, sprockets, tensioning devices, etc., and is an important part of the drilling rig. This machine adopts a combined sealed track chain made of high-strength alloy steel to ensure
2021-03-16
16
2021-03
Geological drill pipe is used for coal mine water exploration, gas exploration and geological exploration with drilling construction drilling tools. The geological drill pipe produced by our company, also known as anti-British drill pipe, round drill pipe, outer flat drill pipe, geological alloy drill pipe and coal mine tunnel regular drill pipe, includes exploration drill pipe with a diameter of 89mm or less for oil drilling and down-the-hole drill pipe for mining. Diameter of geological drill pipe: the specifications and models of geological drill pipe mainly include: Φ34mm(33.5mm) and other geological drill pipe buckle types: mainly divided into cone buckle and flat buckle, flat buckle is generally used
2021-03-16
09
2020-09
What should be paid attention to when using drill tools-YiKuang Technology
(1) Before entering the rod, adjust the appropriate impact pressure, propulsion pressure, rotation speed and buffer pressure according to different geological strata, and debug the pressure values to match the geological strata and rock hardness between the pressure values. (2) When drilling, make the drilling tool group concentric to avoid bending deformation of the drill tail, drill rod and drill head. (3) Avoid empty hitting, stop drilling immediately when empty hitting occurs, and avoid causing excessive damage to drilling tools. (4) After the drilling of the drill rod is completed, each drill rod withdrawn should be coated with cooling lubricating oil in the thread end of the drill rod and the quick joint-after the drilling operation is completed, the thread connection of the drill rod is hot and
2020-09-09
09
2020-09
The relationship between drilling parameters and drilling effect-Yikuang Science and Technology
The relationship between drilling parameters and drilling effect impact pressure: the higher the pressure, the higher the piston speed and the greater the energy generated. When the drill bit is in good contact with the complete hard rock, the shock wave energy can be maximized. On the contrary, when the contact between the drill bit and the rock is not good, the energy cannot leave the drilling tool and be transmitted to the rock, but is reflected back to the drilling tool chain as a tension wave. Only when drilling holes in sufficiently hard rock can the maximum energy of each impact be used. In order to reduce energy reflection when drilling soft rock, the impact pressure or energy must be reduced. The greater any given impact pressure, the greater the stress in the drill pipe section. In order to make the drill rod, drill tail
2020-09-09
09
2020-09
Yikuang Technology analyzes the reasons for the loss of drilling tools for you.
Cause Analysis of Drill Loss (1) The non-concentric drill tail, connecting sleeve and drill pipe of the drill set cause bending deformation of the drill set and stress, resulting in non-cooperation at the joint of the drill set and loosening of the joint part. (2) The pushing pressure is too low, which reduces the penetration efficiency of rock drilling, causes the combination to loosen, causes the energy loss transmitted by the drilling tool group, causes great stress, and causes the instantaneous contact and separation of the contact joint end face. Insufficient pushing pressure is manifested by heating of the drilling tool, "clatter" at the joint, excessive heat causing excessive thread wear and corrosion pits. If the pressure is too high and the rotation speed of the drill bit is too low, there is danger of sticking, and the drill pipe is bent at the same time.
2020-09-09
