Wear resistance increase of sealings of mud end of pump

In this paper, the qualification and the principle of operation of mud pumps are considered. The analysis of the malfunction of the hydraulic part of the pump is also considered. The importance of the work is due to the fact that it was proposed to introduce a support and sealing part of the cuff made of a material of different hardness. The working conditions of the drilling pump from the adopted drilling technology are also considered. An experiment was conducted with the help of which the dependence of the degree of wear of the seal on time was revealed, depending on the material. The importance of the work is due to the fact that the introduction of the support and sealing part of the cuff from a material of different hardness was proposed.

Investigation of the Strength Parameters of Drilling Pumps during the Formation of Contact Stresses in Gears

The relevance of this research lies in the need to develop scientifically based methods for calculating and designing a transmission shaft with a hardened coating of increased strength and service life of a core drilling pump drive that can allow for a redistributing of resistance forces along the contact surfaces of the gear. This relevance is confirmed by the need to improve domestic methods for designing drive shafts of increased reliability which can ensure the development of frozen soils during deposits exploration. The purpose of the research is to increase the energy efficiency and service life of the high-loaded drive gear teeth of core drilling pump transmission shafts by justifying the critical loads and stresses in hardened gear coatings acting under intense wear of the contact surface with a broken contact symmetry. The criteria for the effective wear area with an uneven contact cross-section at the maximum bending moments of the transmission shaft of the drilling pump were justified and presented in the work. Additionally, the process of interaction of the transmission shaft gear teeth with the eccentric shaft gear at uneven axial torques was investigated. The effective power (Ng) of the gearing of the drive transmission shaft gear and the eccentric shaft gear, which characterizes the energy consumption of the drill bit depth stroke, was justified. This work also proposes a method of substantiating the technological and power parameters of the transmission shaft by using Legendre polynomials. A nomographic chart was developed for the determination of the dependence of the contact stress base cycles on the change in the load distribution factor and the contact spot deviation factor from the design axis λ.

Research on Fault Diagnosis Method for Crankshaft of Drilling Pump Based on Operational Deflection Analysis

Crankshaft is the critical component of the drive system of drilling pump. A new state feature extraction method for crankshaft based on operational deflection analysis is presented in this paper. The superiority, feasibility and validity of the system deflection analysis method are figured out with comparison of traditional methods. The vibration deflection technique can supplement with the time-frequency variation of key parts of the crankshaft for the normal measurement information on which the system fault diagnosis is processed. The process illustrates that the method of vibration defection analysis can extract the working state feature entirely and accurately, while provide the valid support for the corresponding fault mode recognition.

Investigation and Application of the BOUAD Characteristics in Multidimensional Vibration’s Parametric Space of Drilling Pump

A large amount of drilling pump vibration signals are acquired and decomposed optimally into time-frequency atoms by the Pattern Filter Method. All of these time-frequency atoms are falling into the multidimensional statistical cube which is formed by the time-frequency atomic parameter (α,f,φ,A) space with certain interval length. The atoms in every cube are counted and the results are stored in a database. When keeping any two parameters in a certain range, the quantitative distribution contour maps in the plane of other two parameters are demonstrated by the Graf software tool, then all sub-space results were aggregated to construct the macro-views of the BOU quantity distribution in the four-dimensional space ,meanwhile the quantitative distribution of these atoms are investigated, the distribution characteristics for various vibration signals of drilling pump are obtained and all atoms are classified according to their clustering state in this parametric space. Furthermore, every special signal corresponding to the parametric feature clustering of atoms in this multidimensional space have been identified. The desired results have been achieved in signal identification and drilling pump fault diagnosis by use of these consequences.