Research Concerning the Movement Equation of the Mechanism of the Conventional Sucker Rod Pumping Units

Abstract

Establishing and then solving the movement equation of the mechanism of the conventional sucker rod pumping units allows determining the variation on the cinematic cycle of the angular speed of the cranks as a dynamic response to the motor and resistant actions on the component elements. The evaluation as accurate as possible of the dynamic response depends on a more precise determination of the variation on the cinematic cycle of the synthesis parameters that occur in the movement equation of the mechanism of the pumping units. In the paper is established the movement equation of the mechanism of the conventional pumping units and are presented a series of results regarding the variation on the cinematic cycle of some synthesis parameters in the case of the mechanism of a C-640D-305-120 pumping unit. Experimental records have been processed with the Total Well Management program and the simulations have been performed with a computer program developed by the author using the Maple programming environment.

Positive Torque Modulation Method and Key Technology of Conventional Beam Pumping Unit

“…A motion analysis sketch of the modified pumping unit suspension point is shown in Figure 3 [20][21][22][23], and can be obtained from Figure 3:…”

Analysis of the Dynamic Response of the Mechanism of Conventional Sucker rod Pumping Units

“…Establishing the variation of the angular acceleration of the cranks of the conventional sucker rod pumping units, which implies the determination of their dynamic response, is particularly important in assessing the operation of the entire pumping installation [1][2][3]. Obtaining high values of the angular acceleration of the cranks would reveal inadequate operation of the pumping unit, due to a poor balancing of the unit mechanism or due to the dynamics of the sucker rod string [4][5][6][7].…”

“…The way of the calculus of red J and red M in the case of the mechanism of the conventional sucker rod pumping units ( fig. 1) is presented in [7].…”

“…In [7] has been highlighted the fact that red J do not depends on 1  and varies very little during the cinematic cycle. So, by considering the reduced mass moment of inertia red J to be constant the following form of the movement equation is obtained: (2) where 1  is the angular acceleration of the cranks.…”

Research Concerning the Simulation of the Operation of Conventional Sucker Rod Pumping Units

“…It is well known that conventional sucker rod pumping units are used intensively in oil extraction, so the study of their optimal operation represents a topical issue [1][2][3][4][5][6][7][8][9][10]. On the other hand, the study of the kinematics and dynamics of the mechanism of these pumping units is part of a broader issue specific to the theory of mechanisms and machines [11][12][13][14][15][16][17][18][19].…”