Experiment And Research On Diamond Nonsmooth Bionics Bit

Diamond drilling is one of the effectual ways drilling in the hardy rocks at present. The advantages or the disadvantages of the technological and economical guideline, are decided by the effect of the diamond bit. However, the diamond bit has many disadvantages during drilling the hardy rocks, for example, the low drilling speed, the low drilling efficiency and the short life. It is easy to lubricious for drilling too. So how to increase the bit's efficiency and life is a arduous task.Bionics is a new intersectant subject which is rapidly developing . It has a broad foreground in the electronic bionic, mechanical bionic, chemic bionic and engineering bionic, etc. Drilling engineering is one necessary applied subject with which exploiting subterranean resource. The high or low technic level of this subject decides the efficiency of subterranean resources'reconnoitering and exploitation. And bionics also can be broadly applied to this subject.By many years experimenting and investigating, we know that we can increase the drilling efficiency of the bit through taking measures the nonsmooth and fixed autogeny bionics theory.Biologic nonsmooth shape are scale shape, convex closure shape, recess shape, waviness, setaceous shape, etc. The paper only studies recess shape nonsmooth , but the result is significant.Through a large amount of the tests with bionics conventional diamond core bits and bionics wire-line diamond core bits in the door and the field, we have reached the following results:1. We tested theΦ59 bionics conventional diamond bits, and came to the results: (1) Nonsmooth shape can display its structure merits such as decreasing resistance, during its shape contacted surface system, and the result is very evident: the dirlling efficiency of the bionics bit is more higher than the ordinary's one. (2) The life of the bionics bit is a bit lower than the ordinary's one in this experiment. But reasons which result in the bit's life reducing can't be finded at present. So we can't educe the conclusion that the life of the bionics bit reduces.2. We tested theΦ75 bionics wire-line diamond core bits, and came to the results: (1) Nonsmooth shape can display its structure merits such as decreasing resistance, wear resistant and non- skid. For example, under the same recipe, the same work flow, the same processing sintering and the same drilling parameters, nonsmooth bionic bits increased above 47% than the common bits. (2) When we compared the bionic bits with the common bits which were used by the Second Jilin Exploration team, the former's drilling speed and the life are higher than the latter's. (3) In this experiment, when we compared the different granularity of the diamond in the bionic bits'work surfaces, we can find that the bit life of 60/70 mesh of the diamond is longer than the 70/80 mesh.The paper is the first predicting the rough life of the diamond bionics bit on the base of the anterior data. We first apply the theory of the bionics surface to the design of the wire-line core bits. And we introduce the different granularity of the diamond in the bits'work surfaces. We also do the in-site examinations for the first time, and obtain the first data.In a word, large numbers of the experimental datas in this paper provide much experience and deficiency for the design of the bionics bit. The bionic bits resolve many difficult problems of the diamond drilling technology, such as the drilling speed and the bit"skidding"in the hardness stratum Also, it provides the new and creating thoughts for scientific researcher who engage in bits'design.