Selection of core drill according to the geological conditions

   Rotary core drill biting rig main function is to form a hole in the ground tank, work object is a rock pile hole depth due to the construction of shallow rock through tectonic movement, the role of mechanical and chemical nature, structure, grain size, porosity, bond conditions , occurrence, strength and other complex changes occur, coupled with our vast pieces of the original, so the object of rotary Arix core drill bit rig work is particularly complex. Summed up in the following categories. By lithology points (common) for shale, sandstone, limestone, granite; divided by cause magmatic rocks, sedimentary, metamorphic; divided by the mechanical properties of sturdy plastic and loose. So how to choose based on stratigraphy core drill bit it? The following classification of introduction. (1) Clay: use single bottom of auger core drill bit bucket, if the diameter is too small can or bucket with two removable panels earth core drill bit bucket. (2) slurries, viscous not strong soil, sand, cement poor gravel layer smaller particle size, can be equipped with a double bottom core drill biting core drill bit bucket. (3) hard clay: use a single port into the soil (single double bottom can) auger core drill bit bucket, bucket teeth straight or spiral. (4) the permafrost: a small amount of available ice bucket teeth straight auger hopper and auger core drill bit bucket, available in large cone ice auger, a description that auger for soil (except silt outside) are valid, but there must be no use of groundwater in the case, in order to avoid the suction effect caused stuck. (5) cemented gravel and strongly weathered rock: be equipped with a conical double bottom auger and auger Diamond Core Drill Machine bucket (large diameter single-port, dual-port with a small particle size) (6) stroke group rock: drum cutter with coring core drill bit - tapered auger - spin double bottom bucket digging core drill bit or auger cutter straight - rotary core drill bit bucket digging double bottom. (7) weathered bedrock: with a cone core drill bit coring barrel - conical auger - Rotary core drill bit bucket digging double bottom should be taken if the diameter is too large grade core drill biting process.

Drum core drill bit

At present, there are two common: tube cutter drill (for medium hard rock and gravel), core drill bit tube (for hard rock and large boulders). In barrel coring drill bit in two categories, and with and without coring device to take points of core devices, depending on the difficulty of coring. Because cone core drill is mainly used for hard rock drilling and drill the ring area, if the conditions can also pass on part in the installation of reverse circulation core drills bits drill to improve drilling efficiency. 1,4 expanding bottom pile diameter drill in deep pile does not increase without increasing basis, in order to improve the bearing capacity of single pile, the design department is often achieved through the pedestal pile, rotary drilling rig construction is expanding bottom without any changes can be construction, you can simply choose belled core drilling bits. Belled drill used to mechanically based, such drills are relatively simple to use and maintain, there is the open and under the open, the opening of the four-link mechanism is generally used for soil, strong winds, weathered even hard rock formations. Due to non-circulation drilling Rotary Drilling, completion of expansion after the end of the barrel with slag slag can be.

The classification of core drilling bits

Current common classification auger core drilling bits common helical auger core drilling bits, rotary bucket, drum core drilling bits, belled core drilling bits, impact core drilling bits, red cone core drilling bits and hydraulic grab grab, following a brief introduction by the class. 1,1 auger (1) cone: Double double spiral, suitable for hard rock. Double single screw for weathered bedrock, gravel, soil, etc. containing ice. Equipped with a variety of the above core drilling bits cutter through tooth pitch, helix angle of the change can be derived from the many types of core drilling bitss. (2) straight auger: a, bucket teeth straight Lo: Double double spiral, suitable for sand, cement poor small-diameter gravel; single-headed screw, suitable for sand, soil; single head single screw, suitable for large diameter difference cemented gravel, clay soil and hard clay. b, picks straight spiral: a double spiral, three and four-Lo Lo, then apply hard rock or gravel. 1,2 auger core drilling bits bucket teeth can be divided by the installed cutter core drilling bits bucket and bucket teeth core drilling bits bucket; the floor can be divided according to the number of double bottom bucket and single bottom bucket; can be divided according to the number of open double doors and fighting single door bucket; can be divided according to taper cone barrel barrel barrel core drill bit bucket and core drilling bits straight fight; shape can be divided according to the lower plate and flat-bottom pot core drilling bits bucket core drilling bits bucket. Above structure combined with each other, plus whether vented, change door mechanism can be combined dozens of auger core drilling bits bucket. Generally applicable double bottom formation core drilling bits bucket wide range, single bottom applies only to tack a strong soil, two-door core drilling bits formations suitable for a wide range of fighting, fighting only for single door core drills bit large diameter and pebbles hard clay.

The application of core drill bits in oil industry

Oil diamond core drill bits for metal, a place where people both familiar and unfamiliar terms. Iron Man Wang Jinxi jumped into the mud pool is famous photograph; but into the automobile age, are inseparable from the era of oil per day, the iron man's back seems hidden in the river of time. In front of the lens and diamond core drill bit Taking this group and the case for people to expand the memory of the screen. The authors used industrial techniques of documentary photography exhibit "Machine + human" art, the subject matter is traditional and simple, and the lens is skillful sophisticated language, such as into nirvana. After years of oil creative photography, the authors would break something light 24-70mm lens 2. Regardless of hardships creation of diamond core drill bits, the most appropriate focal length documentary photography release a strong signal: return to the origin of photography. At the beginning of the invention of arix core drill bit, painting is to replace live recording, although the pictorial photography lyrical rage, but as the most direct visual language, enduring foundation for candid shots. Recent foreign academic debate "Straight Photography" The photography basic terms should be translated "direct photography" or "straight photography", there are people that such realism photography has become outdated.

Using method of core drill bit

Non-core drill bit in use process, because of the existence of these problems, at the same time by the workpiece material, quality requirements, different situations such as restrictions on  core drill bits site, the technical measures adopted accordingly in order to change. 1) due to the  diameter  core drill bits bit of low strength, poor rigidity, easy to break, so the beginning of  core drill bits, the feed force should be light, prevent the  core drill bits bending and sliding, so as to ensure the correct position before cutting  core drill bits. Note that the strength of the hand and feel feeding, when the bit bouncing, let it have a buffer range, in order to prevent the bit broken, sometimes as long as the feed force is very . The feed force is too , manual feed is not easy to feel it, then in the feed mechanism is provided with a  heavy Tuo, by weighing feed purpose. 2) in the core drill bit process, the need to pay attention to the frequent  core core drill bit withdrawing, promptly filed a bit. Because of the  diameter  core drill bits work, chip groove is narrow, chip is not smooth, so we should timely return  core drill bits chip, annealing times and hole  core drill bits depth is proportional to, can also take the opportunity to enter the cooling liquid or cooling in air. 3) use high precision  core drill bits machine,  core drill bitsing machine for  diameter  core drill bits requirements spindle sensitivity and high rotation accuracy,  vibration, good rigidity, the spindle runout should be less than 0.005mm,  spring clamping with special  core drill bits bits, and not the  core drill bits chuck or three jaw chuck clamp  core drill bits. Using circlip clamp can make accurate and reliable positioning, uniform stress and can offset a portion of deflection error, improve the rotation precision  diamond core drill bit, but should never use emery cloth, paper bold  hss core drill bit  handle clamping.

Abrasion of core drill bits

If the inside diameter of the diamond core drill bits core has been clogged badly worn without timely to diamond core drill bits, diamond core drill bits inside diameter will seriously wear. Inner tube loose rope core, inner tube upper suspension failure, are easy to cause clogging and damage the diamond core drill bits cores inside diameter. Note that the core diamond core wood sds plus auger bit blockage often cause burning or sticking. Conclusion In short, the right to judge the working conditions in the diamond diamond core drill bits hole, and for some reason abnormal wear is analyzed on the basis of targeted measures taken in order to improve operations, improve technology to reduce production costs and promote diamond core electroplated core drill bit work to improve the economic and social benefits greater.

The development of core drill bit

Core drill bits or needs to be replaced at the end of the center core drill bits, you should clear the hole, the hole bottom residue Chuijin, then stop turning, the center of the arix core drill bit slowly move up move, the size of the lifting force to move the center of the core drill bits just to mention as appropriate, to enhance the height of the eccentric core drill bits back up contact with the front end of the casing shoe; then core drill bits a low speed reverse, while slowly lifting up the test center core drill bits. When the observed center core drill bits can smoothly upgrade, show eccentric core drill bit has collapsed, then the center core drill bits can enhance a conventional manner, until all proposed center core drill bits. When reversing core drill bits, care should be taken to prevent tripping core drill bit.

Sometimes due to excessive residual rock bottom slag hole, eccentric rotary core drill bits is part of rock slag death eccentric core drill bits folded card. When try to mention a few still does not work, should convey compressed air, re-core drill bits for cleaning, and DTH for a short work, and then re-center the core drill bits lifting operations.
DTH core drill bits pipe construction technology is an effective method for overcoming the complex formation core drill bits means difficult, eccentric core drill bits pipe with its unique structure, excellent performance for complex formation to provide core drill bits construction a reliable technical support. Applied to the construction of the electroplated core drill bit pipe with the specifications of the series has also been increasingly improved.