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Bit is the main component of rotary drill tools because of its replace and repair costs. The direct contact with rock as a hard material leads to produce variety of damages in the bit's surface during the excavation. This paper presents a proper view to the subject of bit's damages in the rotary tricones bit as a prevail tools in large open mines....
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The electric discharge and mechanical technology of hard rock breakage was developed on the ground of mechanical and electrical pulse methods and it was tested for purposes of deep drilling. It was demonstrated that, due to breakage of the rock surface by electric discharges, the rock excavation volume (breakage performance) is significantly improv...
Estimate the available kinetic energy in the system. This available kinetic energy is spent in ejection parabolic-shaped notches from the main host rock mass. Back-calculations of the average ejection speed of the center of mass of large fragments of rock can be made by using this available kinetic energy.
Citations
... In order to minimise the chances of failing during drilling [2], it is necessary to make selections and previous controls that allow managing as many variables as possible. Among the variables that can affect the perforation are: soil formation [3], types of drill bits needed during drilling [4], bits materials [5,6], drilling speed and bottom temperature [7], weather conditions and pipeline to be installed [8,9]. ...
... The direct contact with the rock generates various damage to the surface of the bit during the excavation. According to the observation of drill bits [4], after the perforation, damages appear with different characteristics and mechanisms that can occur in different surfaces of the bit. The mechanisms of wear are varied and complex, but among them, predominate: abrasive [10], chemical [11] adhesive [12], fatigue [13] and erosive wear [10]. ...
... The mechanisms of wear are varied and complex, but among them, predominate: abrasive [10], chemical [11] adhesive [12], fatigue [13] and erosive wear [10]. Observations showed that cracking, cutting, flattening, breaking, rounding and detachment were common modes of damage [4], where many of the bits suffered damage in more than one part simultaneously. ...
The tricone drill bit head is one of the main components in petroleum perforation settings because it makes possible to break the soil to establish a flow path between the reservoir and the wellbore. For this reason, it is a component that requires special analysis. This work investigates the optimization process of the parameters used in the material selection for a tricone drill bit. It includes the material selection for the bit body and the inserts. The stresses to which the drill is subjected during drilling are calculated and conditions to be fulfilled are established according to its function.
